NBS SPECIAL PUBLICATION 260-98

F COMMERCE/National Bureau of Standards

Standard Reference Materials:

Glass Fiberboard

SRM for Thermal

Resistance

oc100 Jerome G. Must

U57

260-98

1985

C 2

U.S. DEPARTMENT
T'M he National Bureau of Standards' was established by an act of Congress on March 3, 1901. The M Bureau's overall goal is to strengthen and advance the nation's science and technology and facilitate their effective application for public benefit. To this end, the Bureau conducts research and provides: (1) a

basis for the nation's physical measurement system, (2) scientific and technological services for industry and

government, (3) a technical basis for equity in trade, and (4) technical services to promote public safety. The Bureau's technical work is performed by the National Measurement Laboratory, the National Engineering Laboratory, the Institute for Computer Sciences and Technology, and the Institute for Materials Science and Engineering

The National Measurement Laboratory

Provides the national system of physical and chemical measurement;

coordinates the system with measurement systems of other nations and

furnishes essentiaJ services leading to accurate and uniform physical and

chemical measurement throughout the Nation's scientific community, in- dustry, and commerce; provides advisory and research services to other .Government agencies; conducts physical and chemical research; develops, produces, and distributes Standard Reference Materials; and provides

calibration services. The Laboratory consists of the following centers:

Basic Standards^ Radiation Research Chemical Physics

Analytical Chemistry

The National Engineering Laboratory

Provides technology and technical services to the public and private sectors to address national needs and to solve national problems; conducts research in engineering and applied science in support of these efforts; builds and maintains competence in the necessary disciplines required to carry out this research and technical service; develops engineering data and measurement

capabilities; provides engineering measurement traceability services; develops

test methods and proposes engineering standards and code changes; develops and proposes new engineering practices; and develops and improves mechanisms to transfer results of its research to the ultimate user. The

Laboratory consists of the following centers:

Applied Mathematics

Electronics and Electrical Engineering^ Manufacturing Engineering

Building Technology

Fire Research Chemical Engineering^

The Institute for Computer Sciences and Technology

Conducts research and provides scientific and technical services to aid Federal agencies in the selection, acquisition, application, and use of computer technology to improve effectiveness and economy in Government

operations in accordance with Public Law 89-306 (40 U.S.C. 759), relevant Executive Orders, and other directives; carries out this mission by managing

the Federal Information Processing Standards Program, developing Federal ADP standards guidelines, and managing Federal participation in ADP

voluntary standardization activities; provides scientific and technological advisory services and assistance to Federal agencies; and provides the technical foundation for computer-related policies of the Federal Government. The Institute consists of the following centers:

Programming Science and

Technology Computer Systems

Engineering

77?^ Institute for Materials Science and Engineering

Conducts research and provides measurements, data, standards, reference

materials, quantitative understanding and other technical information funda- mental to the processing, structure, properties and performance of materials; addresses the scientific basis for new advanced materials technologies; plans

research around cross-country scientific themes such as nondestructive

evaluation and phase diagram development; oversees Bureau-wide technical programs in nuclear reactor radiation research and nondestructive evaluation; and broadly disseminates generic technical information resulting from

its programs. The Institute consists of the following Divisions:

Inorganic Materials Fracture and Deformation^ Polymers

Metallurgy Reactor Radiation

'Headquarters and Laboratories at Gaithersburg, MD, unless otherwise noted; mailing address

Gaithersburg, MD 20899. ^Some divisions within the center are located at Boulder, CO 80303. 'Located at Boulder. CO. with some elements at daither^hiiro MP)
Standard Reference Materials:

Glass Fiberboard SRM for

Thermal Resistance

Jerome G. Must

Center for Chemical Engineering

National Engineering Laboratory

National Bureau of Standards

Boulder, CO 80303

Sponsored by: Office of Standard Reference Materials National Measurement Laboratory

National Bureau of Standards

Gaithersburg, MD 20899

U.S. DEPARTIVIENT OF COMMERCE, Malcolm Baldrige, Secretary

NATIONAL BUREAU OF STANDARDS, Ernest Ambler, Director Issued August 1985
Library of Congress Catalog Card Number: 85-600566

National Bureau of Standards Special Publication 260-98

Natl. Bur. Stand. (U.S.), Spec. Publ. 260-98, 31 pages (Aug. 1985)

CODEN: XNBSAV

U.S. GOVERNMENT PRINTING OFFICE

WASHINGTON: 1985 For sale by the Superintendent of Documents, U.S. Government Printing Office, Washington, DC 20402
Preface

Standard Reference Materials (SRM's) as defined by the National Bureau of Standards (NBS) are well-characterized materials, produced in quantity and certified for one or more physical or chemical properties. They are used to assure the accuracy and compatibility of measurements

throughout the Nation. SRM's are widely used as primary standards in many diverse fields in science, industry, and technology, both within the United States and throughout the world. They are also used extensively in the fields of environmental and clinical analysis. In many applications, traceability of quality control and measurement processes to the national measurement system is carried out through the mechanism and use of SRM's. For many of the Nation's scientists and technologists it is therefore of more than passing interest to know the details of the measurements

made at NBS in arriving at the certified values of the SRM's produced. An NBS series of papers, of which this publication is a member, called the NBS Special Publication - 260 Series , is reserved for this purpose.

The 260 Series is dedicated to the dissemination of information on different phases of the preparation, measurement, certification and use of NBS SRM's. In general, much more detail will be found in these papers than is generally allowed, or desirable, in scientific journal articles. This enables the user to assess the validity and accuracy of the measurment processes employed, to judge

the statistical analysis, and to learn details of techniques and methods utilized for work entailing

the greatest care and accuracy. These papers also should provide sufficient additional information

not found on the certificate so that new applications in diverse fields not foreseen at the time the SRM was originally issued will be sought and found. Inquiries concerning the technical content of this paper should be directed to the author(s). Other questions concered with the availability, delivery, price, and so forth, will receive prompt attention from: Office of Standard Reference Materials National Bureau of Standards Gaithersburg, MD 20899

Stanley D. Rasberry, Chief Office of Standard Reference Materials

ili
OTHER NBS PUBLICATIONS IN THIS SERIES

Catalog of NBS Standard Reference Materials

(1984-85 edition), Catherine H. Hudson, ed., NBS

Spec. Publ. 260 (February 1984)'. $5.50* SN003-

003-02558-5.

Michaelis, R. E., and Wyman, L. L. Standard

Reference Materials: Preparation of White Cast

Iron Spectrochemical Standards. NBS Misc. Publ. 260-1 (June 1964). COM74- 1 1061

Michaelis, R. E., Wyman, L. L., and Flitsch, R., Standard Reference Materials: Preparation of NBS Copper-Base Spectrochemical Standards. NBS Misc. Publ. 260-2 (October 1964). COM74-

11063**

Michaelis, R. E., Yakowitz, H., and Moore, G. A., Standard Reference Materials: Metallographic

Characterization of an NBS Spectrometric LowAlloy Steel Standard. NBS Misc. Publ. 260-3 (October 1964). COM74-1 1060** Hague, J. L. Mears, T. W., and Michaelis, R. E., Standard Reference Materials: Sources of

Information, NBS Misc. Publ. 260-4 (February

1965). COM74-11059

Alvarez, R., and Flitsch R., Standard Reference

Materials: Accuracy of Solution X-Ray Spectrometric Analysis of Copper-Base Alloys. NBS

Misc. Publ. 260-5 (March 1965). PB168068**

Shultz, J. I., Standard Reference Materials: Methods for the Chemical Analysis of White

Cast Iron Standards, NBS Misc. Publ. 260-6

(July 1965). COM74-11068**

Bell, R. K., Standard Reference Materials: Methods for the Chemical Analysis of NBS

Copper-Base Spectrochemical Standards. NBS

Misc. Publ. 260-7 (October 1965). COM74-

11067** Richmond, M.S., Standard Reference Materials: Analysis of Uranium Concentrates at the

National Bureau of Standards. NBS Misc. Publ. 260-8 (December 1965). COM74-1 1066** Anspach, S. C, Cavallo, L. M. Garfinkel, S. B. Hutchinson, J. M. R., and Smith, C. N., Standard Reference Materials: Half Lives of Materials Used in the Preparation of Standard Reference Materials of Nineteen Radioactive Nuclides

Issued by the National Bureau of Standards NBS Misc. Publ. 260-9 (November 1965). COM74-I1065**

Yakowitz, H., Vieth, D. L., Heinrich, K. F. J., and

Michaelis, R. E., Standard Reference Materials: Homogeneity Characterization of NBS Spectrometric Standards II: Cartridge Brass and LowAlloy Steel, NBS Misc. Publ. 260-10 (December

(1965). COM74-11064**

Napolitano, A., and Hawkins, E. G., Standard Reference Materials: Viscosity of Standard

Lead-Silica Glass, NBS Misc. Publ. 260-11 (November 1966). NBS Misc. Publ. 260-11** Yakowitz, H., Vieth, D. L., and Michaelis, R. E., Standard Reference Materials: Homogeneity

Characterization of NBS Spectrometric Standards III: White Cast Iron and Stainless Steel Powder Compact, NBS Misc. Publ. 260-12

(September 1966). NBS Misc. Publ. 260-12**

Spijkerman, J. L., Snediker, D. K., Ruegg, F. C,

and DeVoe, J. R., Standard Reference Materials: Mossbauer Spectroscopy Standard for the Chemical Shift of Iron Compounds, NBS Misc. Publ. 260-13 (July 1967). NBS Misc. Publ.

260-13**

Menis, O., and Sterling, J. T., Standard Reference

Materials: Determination of Oxygen in Ferrous

Materials - SRM 1090, 1091, and 1092, NBS

Misc. Publ. 260-14 (September 1966). NBS Misc.

Publ. 260-14**

Passaglia, E., and Shouse, P. J., Standard Refer- ence Materials: Recommended Method of Use

of Standard Light-Sensitive Paper for Calibrat- ing Carbon Arcs Used in Testing Textiles for Colorfastness to Light, NBS Misc. Publ. 260-15 (June 1967). (Replaced by NBS Spec. Publ.

260-41.) Yakowitz, H., Michaelis, R. E., and Vieth, D. L., Standard Reference Materials: Homogeneity

Characterization of NBS Spectrometric Standards IV: Preparation and Microprobe Characterization of W-20% MO Alloy Fabricated by Powder Metallurgical Methods, NBS Spec.

Publ. 260-16 (January 1969). COM74-1 1062** Catanzaro, E. J., Champion, C. E., Garner, E. L., Marinenko, G., Sappenfield, K. M., and Shields, W. R., Standard Reference Materials: Boric

Acid; Isotopic and Assay Standard Reference

Materials, NBS Spec. Publ. 260-17 (February

1970). Out of Print. Geller, S. B., Mantek, P.A., and Cleveland, N.

G., Standard Reference Materials: Calibration of NBS Secondary Standard Magnetic Tape (Computer Amplitude Reference) Using the Reference Tape Amplitude Measurement

"Process A," NBS Spec. Publ. 260-18 (November

1969). (See NBS Spec. Publ. 260-29.) Paule, R. C, and Mandel, J., Standard Reference

Materials: Analysis of Interlaboratory Measurements on the Vapor Pressure of Gold (Certifica- tion of Standard Reference Material 745). NBS

Spec. Publ. 260-19 (January 1970). PBI90071**

Paule, R. C, and Mandel, J., Standard Reference

Materials: Analysis of Interlaboratory Measurements on the Vapor Pressures of Cadmium and

Silver, NBS Spec. Publ. 260-21 (January 1971). COM74- 11359** Yakowitz, H., Fiori, C. E., and Michaelis, R. E., Standard Reference Materials: Homogeneity

Characterization of Fe-3 Si Alloy, NBS Spec.

Publ. 260-22 (February 1971). COM74-1 1357**

Napolitano, A., and Hawkins, E. G., Standard

Reference Materials: Viscosity of a Standard

Borosilicate Glass, NBS Spec. Publ. 260-23 (December 1970). COM71-00I57**

Sappenfield, K. M., Marineko, G., and Hague, J. L., Standard Reference Materials: Comparison

of Redox Standards, NBS Spec. Publ. 260-24 (January 1972). COM72-50058**

iv
Hicho, G. E., Yakowitz, H., Rasberry, S. D., and

Michaelis, R. E., Standard Reference Materials: A Standard Reference Material Containing

Nominally Four Percent Austenite, NBS Spec.

Publ. 260-25 (February 1971). COM74-1 1356** Martin, J. F., Standard Reference Materials:

National Bureau of Standards-US Steel Corporation Joint Program for Determining Oxygen and Nitrogen in Steel, NBS Spec. Publ. 260-26

(February 1971). 85 cents* PB 81176620

Garner, E. L., Machlan, L. A., and Shields, W. R., Standard Reference Materials: Uranium

Isotopic Standard Reference Materials, NBS

Spec. Publ. 260-27 (April 1971). COM74-

1I358**

.Heinrich, K. F. J., Myklebust, R. L., Rasberry, S. D., and Michaelis, R. E., Standard Reference Materials: Preparation and Evaluation of SRM's 481 and 482 Gold-Silver and GoldCopper Alloys for Microanalysis, NBS Spec.

Publ. 260.-28 (August 1971). COM71-50365"

Geller, S. B., Standard Reference Materials: Cali- bration of NBS Secondary Standard Magnetic Tape (Computer Amphtude Reference) Using

the Reference Tape Amplitude Measurement

"Process A-Model 2," NBS Spec. Publ. 260-29

(June 1971). COM71-50282

Gorozhanina, R. S., Freedman, A. Y., and

Shaievitch, A. B. (translated by M. C. Selby), Standard Reference Materials: Standard

Samples Issued in the USSR (A Translation from the Russian). NBS Spec. Publ. 260-30 (June

1971). COM71-50283**

Hust, J. G., and Sparks, L. L., Standard Reference

Materials: Thermal Conductivity of Electrolytic Iron SRM 734 from 4 to 300 K, NBS Spec. Publ. 260-31 (November 1971). COM71-50563**

Mavrodineanu, R., and Lazar, J. W., Standard

Reference Materials: Standard Quartz Cuvettes,

for High Accuracy Spectrophotometry, NBS

Spec. Publ. 260-32 (December 1973). 55 cents* SN003-003-01213-1 Wagner, H. L., Standard Reference Materials: Comparison of Original and Supplemental SRM 705, Narrow Molecular Weight Distri- bution Polystyrene, NBS Spec. Publ. 260-33 (May 1972). COM72-50526**

Sparks, L. L., and Hust, J. G., Standard Reference

Materials: Thermoelectric Voltage, NBS Spec.

Publ. 260^34, (April 1972). COM72-5037I**

Sparks, L. L., and Hust, J. G., Standard Refer- ence Materials: Thermal Conductivity of

Austenitic Stainless Steel, SRM 735 from 5

to 280 K, NBS Spec. Publ. 260-35 (April 1972.) 35 cents* COM72-50368**

Cali, J. P., Mandel, J., Moore, L. J., and Young, D.

S., Standard Reference Materials: A Referee Method for the Determination of Calcium in Serum, NBS SRM 915, NBS Spec. Publ. 260-36 (May 1972). COM72-50527**

Shultz, J. 1. Bell., R. K. Rains, T. C, and Menis,

O., Standard Reference Materials: Methods of Analysis of NBS Clay Standards, NBS Spec.

Publ. 260-37 (June 1972). COM72-50692**

Richmond, J. C, and Hsia, J. J., Standard Refer- ence Materials: Preparation and Calibration of Standards of Spectral Specular Reflectance, NBS Spec. Publ. 260-38 (May 1972). COM72-

50528**

Clark, A. F., Denson, V.A., Hust, J. G., and

Powell, R. L., Standard Reference Materials: The Eddy Current Decay Method for Resistivity Characterization of High-Purity Metals, NBS

Spec. Publ. 260-39 (May 1972). COM72-50529**

McAdie, H. G., Garn, P.D., and Menis, O., Standard Reference Materials: Selection of Thermal

Analysis Temperature Standards Through a Cooperative Study (SRM 758, 759, 760), NBS

Spec. Publ. 260-40 (August 1972.) COM72-

50776** Wood, L. A., and Shouse, P. J., Standard

Reference Materials: Use of Standard LightSensitive Paper for Calibrating Carbon Arcs Used in Testing Textiles for Colorfastness to Light, NBS Spec. Publ. 260-41 (August 1972) COM72-50775**

Wagner, H. L. and Verdier, P. H., eds.. Standard

Reference Materials: The Characterization of Linear Polyethylene, SRM 1475, NBS Spec. Publ. 260-42 (September 1972). COM72-

50944**

Yakowitz, H., Ruff, A. W., and Michaelis, R. E., Standard Reference Materials: Preparation and Homogeneity Characterization of an Austenitic Iron-Chromium-Nickel Alloy, NBS Spec. Publ. 260-43 (November 1972). COM73-50760**

Schooley, J. F., Soulen, R. J., Jr., and Evans, G. A.,

Jr., Standard Reference Materials: Preparation and Use of Superconductive Fixed Point

Devices, SRM 767, NBS Spec. Publ. 260-44 (December 1972). COM73-50037**

Greifer, B., Maienthal, E. J., Rains, T. C, and

Rasberry, S. D., Standard Reference Materials: Powdered Lead-Based Paint, SRM 1579, NBS

Spec. Publ. 260-45 (March 1973). COM73-

50226**

Hust, J. G., and Giarratano, P. J., Standard Refer- ence Materials: Thermal Conductivity and

Electrical Resistivity Standard Reference Materials: Austenitic Stainless Steel, SRM's 735 and

798, from 4 to 1200 K, NBS Spec. Publ. 260-46 (March 1975). SN0O3-O03-0 1278-5*

Hust, J. G., Standard Reference Materials: Electrical Resistivity of Electrolytic Iron, SRM 797, and Austenitic Stainless Steel, SRM 798, from 5

to 280 K, NBS Spec. Publ. 260-47 (February

1974). COM74-50I76** Mangum, B. W., and Wise, J. A., Standard Refer- ence Materials: .Description and Use of Precision Thermometers for the Clinical Laboratory, SRM 933 and SRM 934, NBS Spec. Publ. 260-48 (May 1974). 60 cents* SN003-003-OI278-5

Carpenter, B. S., and Reimer, G. M., Standard

Reference Materials: Calibrated Glass Standards for Fission Track Use, NBS Spec. Publ. 260-4§ (November 1974). COM74-5II85

V
Hust, J. G., and Giarratano, P. J., Standard Refer- ence Materials: Thermal Conductivity and Electrical Resistivity Standard Reference Materials:

Electrolytic Iron, SRM's 734 and 797 from 4 to 1000 K, NBS Spec. Publ. 260-50 (June 1975). $1.00* SN003-003-0I425-7 Mavrodineanu, R., and Baldwin, J. R., Standard

Reference Materials: Glass Filters As a Standard Reference Material for Spectrophotometry;

Selection; Preparation; Certification; Use-SRM

930, NBS Spec. Publ. 260-51 (November 1975). $1.90* SN003-003-01481-8

Hust, J. G., and Giarratano, P. J., Standard Refer- ence Materials: Thermal Conductivity and Electrical Resistivity Standard Reference Materials 730 and 799, from 4 to 3000 K, NBS Spec. Publ. 260-52 (September 1975). $1.05* SN003-003-

01464-8 Durst, R. A., Standard Reference Materials: Standardization of pH Measurements, NBS

Spec. Publ. 260-53 (December 1975, Revised). $1.05 SN0O3-OO3-01551-2

Burke, R. W., and Mavrodineanu, R., Standard

Reference Materials: Certification and Use of Acidic Potassium .Dichromate Solutions as an

Ultraviolet Absorbance Standard, NBS Spec.

Publ. 260-54 (August 1977). $3.00* SN003-003-

01828-7

Ditmars, D. A., Cezairliyan, A., Ishihara, S., and

Douglas, T. B., Standard Reference Materials: Enthalpy and Heat Capacity; Molybdenum SRM 781, from 273 to 2800 K, NBS Spec. Publ. 260-55 (September 1977). $2.20* SN003-003-

01836-8

Powell, R. L., Sparks, L. L., and Hust, J. G., Standard Reference Materials: Standard

Thermocouple Materials, Pt.67: SRM 1967, NBS

Spec. Publ. 260-56 (February 1978). $2.20* SN003-003-0 18864

Cali, J. P. and Plebanski, T., Guide to United

States Reference Materials, NBS Spec. Publ. 260-57 (February 1978). $2.20* PB 277173

Barnes, J. D., and Martin, G. M., Standard Refer- ence Materials: Polyester Film for Oxygen Gas

Transmission Measurements SRM 1470, NBS

Spec. Publ. 260-58 (June 1979) $2.00* SN003-

003-02077 Chang, T., and Kahn, A. H. Standard Reference

Materials: Electron Paramagnetic Resonance

Intensity Standard; SRM -2601, NBS Spec.

Publ. 260-59 (August 1978) $2.30* SN003-

003-01975-5 Velapoldi, R. A., Paule, R. C, Schaffer, R., Mandel, J., and Moody, J. R., Standard Refer- ence Materials: A Reference Method for the Determination of Sodium in Serum, NBS Spec.

Publ. 260-60 (August 1978). $3.00* SN003-003

01978-0

Verdier, P. H., and Wagner. H. L., Standard Refer- ence Materials: The Characterization of Linear Polyethylene (SRM 1482, 1483, 1484), NBS

Spec. Publ. 260-61 (December 1978). $1.70* SN003-003-02006-1

Soulen, R. J., and Dove, R. B., Standard Reference

Materials: Temperature Reference Standard

for Use Below 0.5 K (SRM 768). NBS Spec.

Publ. 260-62 (April 1979). $2.30* SN003-003-

02047-8 Velapoldi, R. A., Paule, R. C, Schaffer, R. Mandel, J., Machlan, L. A., and Gramlich, J. W., Standard Reference Materials: A Reference Method for the Determination of Potassium in Serum. NBS Spec. Publ. 260-63 (May 1979). $3.75* SN003-003-02068

Velapoldi, R. A., and Mielenz, K. D., Standard

Reference Materials: A Fluorescence Standard

Reference Material Quinine Sulfate Dihydrate (SRM 936), NBS Spec. Publ. 260-64 (January

1980). $4.25* SN003-003-02 148-2 Marinenko, R. B., Heinrich, K. F. J., and Ruegg,

F. C, Standard Reference Materials: Micro- Homogeneity Studies of NBS Standard Reference

Materials, NBS Research Materials, and Other Related Samples. NBS Spec. Publ. 260-65

(September 1979). $3.50* SN003-003-021 14-1 Venable, W. H., Jr., and Eckerle, K. L., Standard

Reference Materials: Didymium Glass Filters for Calibrating the Wavelength Scale of Spectro- photometers (SRM 2009, 2010, 2013). NBS Spec.

Publ. 260-66 (October 1979). $3.50* SN003-003-

02127-0

Velapoldi, R. A., Paule, R. C, Schaffer, R., Mandel,

J., Murphy, T. J., and Gramhch, J. W., Standard

Reference Materials: A Reference Method forthe Determination of Chloride in Serum, NBS Spec.

Publ. 260-67 (November 1979). $3.75* SN003-

003-02136-9 Mavrodineanu, R. and Baldwin, J. R., Standard

Reference Materials: Metal-On-Quartz Filters as a Standard Reference Material for Spectrophoto- metry-SRM 2031, NBS Spec. Publ. 260-68

(April 1980). $4.25* SN003-003-02 167-9 Velapoldi, R. A., Paule, R. C, Schaffer, R., Mandel, J., Machlan, L. A., Gamer, E. L., and

Rains, T. C, Standard Reference Materials: A

Reference Method for the Determination of Lithium in Serum, NBS Spec. Publ. 260-69 (July)

1980). $4.25* SN003-003-02214-4 Marinenko, R. B., Biancaniello, F., Boyer, P. A., Ruff, A. W., DeRobertis, L., Standard Reference

Materials: Preparation and Characterization of an Iron-Chromium-Nickel Alloy for Microanalysis, NBS Spec. Publ. 260-70 (May 1981). $2.50* SNO03-OO3-02328-1 Seward, R. W., and Mavrodineanu, R., Standard

Reference Materials: Summary of the Clinical Laboratory Standards Issued by the National Bureau of Standards, NBS Spec. Publ. 260-71 (November 1981). $6.50* SN003-003-02381-7

Reeder, D.J., Coxon, B., Enagonio, D., Christensen,

R. G., Schaffer, R., Howell, B. F., Paule, R. C,

Mandel, J., Standard Reference Materials: SRM

900, Antiepilepsy Drug Level Assay Standard, NBS Spec. Publ. 260-72 (June 1981). $4.25* SN003-003-02329-9

vi
Interrante, C. G., and Hicho, G. E., Standard Refer- ence Materials: A Standard Reference Material Containing Nominally Fifteen Percent Austenite (SRM 486), NBS Spec. Publ. 260-73 (January

1982). $2.75* SN003-OO3-O2386-8 Marinenko, R. B., Standard Reference Materials: Preparation and Characterization of K-41 1 and

K-414 Mineral Glasses for Microanalysis: SRM

470. NBS Spec. Publ. 260-74 (April 1982). $3.50 SN0O3-OO3-O23-95-7

Weidner, V. R., and Hsia, J. J., Standard Reference

Materials: Preparation and Calibration of First Surface Aluminum Mirror Specular Reflectance Standards (SRM 2003a), NBS Spec. Publ. 260-75 (May 1982). $3.75 SN003-003-023-99-0

Hicho, G. E. and Eaton, E. E., Standard Reference Materials: A Standard Reference Material

Containing Nominally Five Percent Austenite (SRM 485a), NBS Spec. Publ. 260-76 (August

1982). $3.50 SNOO3-OO3-024-33-3 Furukawa, G. T., Riddle, J. L., Bigge, W. G., and

Pfieffer, E. R., Standard Reference Materials: Apphcation of Some Metal SRM's as Thermometric Fixed Points, NBS Spec. Publ. 260-77 (August 1982). $6.00 SN003-003-024-34-1

Hicho, G. E. and Eaton, E. E., Standard Reference

Materials: Standard Reference Material Containing Nominally Thirty Percent Austenite (SRM

487), NBS Spec. Publ. 260-78 (September 1982). $3.75* SN003-003-024-35-0 Richmond, J. C, Hsia, J. J. Weidner, V. R., and

Wilmering, D. B., Standard Reference Materials: Second Surface Mirror Standards of Specular

Spectral Reflectance (SRM's 2023, 2024, 2025), NBS Spec. Publ. 260-79 (October 1982). $4.50* SN003-003-024-47-3

Schaffer, R., Mandel, J., Sun, T., Cohen, A., and

Hertz, H. S., Standard Reference Materials: Evaluation by an ID/ MS Method of the AACC

Reference Method for Serum Glucose, NBS

Spec. Publ. 260-80 (October 1982). $4.75* SN003-

003-024-43-1 Burke, R. W., and Mavrodineanu, R. (NBS retired). Standard Reference Materials: Accuracy in Analytical Spectrophotometry, NBS Spec. Publ. 260-81 (April 1983). $6.00* SN003-003-024-8

Weidner, V. R., Standard Reference Materials: White Opal Glass Diffuse Spectral Reflectance Standards for the Visible Spectrum (SRM's 2015 and 2016). NBS Spec. Publ. 260-82 (April 1983). $3.75* SN003-003-024-89-9**

Bowers, G. N., Jr., Alvarez, R., Cali, J. P. (NBS

retired), Eberhardt, K. R., Reeder, D. J., Schaffer, R., Uriano, G. A., Standard Reference

Materials: The Measurement of the Catalytic

(Activity) Concentration of Seven Enzymes in NBS Human Serum SRM 909, NBS Spec.

Publ. 260-83 (June 1983). $4.50* SN003-003-024-

99-6

Gills, T. E., Seward, R. W., Collins, R. J., and

Webster, W. C, Standard Reference Materials: Sampling, Materials Handling, Processing, and Packaging of NBS Sulfur in Coal Standard

Reference Materials, 2682, 2683, 2684, and 2685, NBS Spec. Publ. 260-84 (August 1983). $4.50* SN0O3-O03-O25-2O-8

Swyt, D. A., Standard Reference Materials: A Look

at Techniques for the Dimensional Calibration of Standard Microscopic Particles, NBS Spec. Publ. 260-85 (September 1983). $5.50* SN003-003-

025-21-6 Hicho, G. E. and Eaton, E. E., Standard Reference Materials: A Standard Reference Material

Containing Two and One-Half Percent Austenite, SRM 488, NBS Spec. Publ. 260-86 (December

1983). $1.75* SN003-003-025-4I-1 Mangum, B. W., Standard Reference Materials: SRM 1969: Rubidium Triple-Point - A Temperature Reference Standard Near 39.30 °C, NBS

Spec. Publ. 260-87 (December 1983). $2.25* SN003-003-025-44-5 Gladney, E. S., Burns, C. E., Perrin, D. R., Roelandts, I., and Gills, T. E., Standard Reference Materials: 1982 Compilation of Elemental

Concentration Data for NBS Biological, Geological, and Environmental Standard Reference

Materials. Spec. Publ. 260-88 (March 1984). $7.00* SN003-003-02565-8

Hust, J. G., Standard Reference Materials: A Fine- Grained, Isotropic Graphite for Use as NBS

Thermophysical Property RM's from 5 to 2500 K, NBS Spec. Publ. 260-89 (September 1984). $4.50* SN003-003-02608-5 Hust, J. G., and Lankford, A. B., Standard Reference Materials: Update of Thermal

Conductivity and Electrical Resistivity of

Electrolytic Iron, Tungsten, and Stainless Steel, NBS Spec. Publ. 260-90 (September 1984). $3.00* SN003-003-02609-3

Goodrich, L. F., Vecchia, D. F., Pittman, E. S., Ekin, J. W., and Clark, A. F., Standard Reference

Materials: Critical Current Measurements on an NbTi Superconducting Wire Standard Reference

Material, NBS Spec. Publ. 260-91 (September

1984). $2.75* SN003-003-026I4-0

Carpenter, B. S., Standard Reference Materials: Calibrated Glass Standards for Fission Track Use (Supplement to NBS Spec. 260-49). NBS

Spec. Publ.. 260-92 (September 1984). $1.50* SNOO3-OO3-O26I0-7

Ehrstein, J., Preparation and Certification of Standard Reference Materials for Calibration of Spreading Resistance Probes, NBS Spec. Publ. 260-93 (January 1985).

Gills, T. E., Koch, W. F. Stolz, J. W., Kelly, W. R., Paulsen, P. J., Colbert, J. C. Kirklin, D. R., Pei, P.T.S., Weeks, S., Lindstrom, R. M.

Fleming, R. F., Greenberg, R. R., and

Paule, R. C, Methods and Procedures Used at the National Bureau of Standards to Certify Sulfur

in Coal SRM's for Sulfur Content, Calorific Value, Ash Content, NBS Spec. Publ. 260-94 (December 1984). Mulholland, G. W., Hartman, A. W., Hembree,

G. G., Marx, E., and Lettieri, T. R., Standard

Reference Materials: Development of a I p m

Diameter Particle Size Standard, SRM 1690, NBS Spec. Publ. 260-95 (May 1985). Carpenter, B. S., Gramlich, J. W., Greenberg, R. R., and Machlan, L. A., Standard Reference

Materials: Uranium-235 Isotopic Abundance Standard Reference Materials for Gamma

Spectrometry Measurements, NBS Spec. Publ. 260-96 (In Press).

vii
Mavrodincanu, R. and Gills, T. E., Standard

Reference Materials: Summary of the Coal, Ore,

Mineral, Rock, and Refractory Standards Issued by the National Bureau of Standards, NBS Spec.

Publ. 260-97 (In Press). Hust, J. G., Standard Reference Materials: Glass Fiberboard SRM for Thermal Resistance, NBS

Spec. Publ. 260-98 (In Press).

* Send order with remittance to Superintendent

of Documents, US Government Printing Office Washington, DC 20402. Remittance from

foreign countries should include an additional one-fourth of the purchase price for postage. May be ordered from: National Technical Information Services (NTIS). Springfield

Virginia 22161.
TABLE OF CONTENTS

Page Preface iii Abstract 1

1. Introduction 1 2. Material Characterization 2 3. Measurements 2

4. Data Analysis 6

5. Comparisons 6

6. Certified Values -

• . 16

7. Summary 20

8. Acknowledgments 20

9. References 20

ix

standard Reference Materials: Glass Fiberboard SRM for Thermal Resistance

J. G. Hust Chemical Engineering Science Division

Center for Chemical Engineering

National Bureau of Standards

Boulder, Colorado 80303

The apparent thermal conductivity data that provide the basis for the certification of glass fiberboard as an SRM of thermal resistance are reported and analyzed. New data for the extension of the temperature range

of this SRM to 100 K are included. Detailed analysis and i ntercompari sons of previously described NBS and other published data are given. These data

are represented by an equation describing the dependencies of the data on temperature and density. Certified values of thermal resistance are given for temperatures from 100 to 330 K and densities from 113 to 145 kg/m-^. Key words: apparent thermal conductivity; density; glass fiberboard;

Standard Reference Material; temperature; thermal resist- ance

1. Introduction

The National Bureau of Standards (NBS) has an on-going program to establish

physical property Standard Reference Materials (SRM's) as needed to improve mea- surement reliability. The Center for Chemical Engineering (CCE) has been active

in a portion of this effort for about 20 years in establishing SRM's for thermal conductivity over a broad range of conductivities and temperatures. The status

of this effort was recently summarized by Hust [1]. The Center for Building

Technology (CBT) has supplied calibrated transfer specimens (CTS's) for thermal resistance of insulations for over 50 years. More recently they have utilized

the large data base of the CTS effort to provide the basis for establishing glass

fiberboard as an SRM [2,3].

During the mid 19 70 's, the American Society for Testing and Materials recognized the strong need for thermal insulation SRM's. As a consequence, a task group was established under the auspices of ASTM subcommittee C16.30 on thermal measurements. The recommendations for establishing thermal insulations SRM's was published in 1978 [4]. The purpose of the present publication is to describe the combined effort of CCE and CBT of NBS to establish the first of a series of insulation SRM's as recommended by the ASTM subcommittee. The first insulation SRM is a glass fiber- board material. It was established as an SRM of thermal resistance by Siu and Hust [2] for the temperature range 255 to 330 K in 1982. The new data provided

in this publication are the basis for extending this certification down to 100 K. First, a description of the basis for the new certification is presented. Com- parisons between this new certification and the previous certification and other

published data are also included.

1
2. Material Characterization

During the past twenty five years, CBT has performed over 300 thermal re- sistance calibrations for industry and government laboratories. Several distinct

lots of material have been used for this purpose. These lots are designated in this publication by the year in which they were acquired by NBS, e.g., lot 58,

59, etc. The thermal resistance data from these calibrations have been compiled

and published by Siu [3]. Four lots of material (58, 59, 61, and 70) are described by Siu [3]. The material for each lot consists of fibrous glass made

into a semirigid board with a phenolic binder. The fibers are oriented with their lengths extending primarily parallel to the face of the boards. Subsequent to the publication by Siu [3], two additional lots of material were acquired by NBS and are designated as lots 80 and 81. Because the earlier

lots were rapidly consumed as CTS and SRM material , the 80 and 81 lots represent

the present NBS supply of material for SRM 1450b. Although nominally the same, these lots differ somewhat in their thermal characteristics. These differences are attributed to variations in manufacturing

processes and the resultant differences in fiber diameter and orientation as well

as differences in phenolic content. The bulk densities of the material in the

lots range from 70 to 150 kg/m^.

3. Measurements

The data reported and described in this publication were obtained from three

NBS apparatus:

a) The CBT square guarded hot plate with a 20 cm square plate and a 10 cm

square meter section. This apparatus has been used many years for CTS calibrations but is not specifically described in the literature.

b) The CBT line source guarded hot plate with a 30 cm diameter plate and a 15 cm diameter meter section. It is described by Hahn [5].

c) The CCE circular guarded hot plate with a 20 cm diameter plate and a 10 cm diameter meter section. It is described by Smith, Must, and Van Poolen [6]. Prior to 1980 numerous measurements were conducted on four lots of similar

fiberboard material. The results of these tests are discussed in section 5. After 1980 specimens from lots 80 and 81 were measured by both CBT and CCE. These data indicated that lots 80 and 81 were indistinguishable and the data were

used to certify the two lots as SRM 1450b [2]. At that time, the density dependence of these lots had not been well-established for low temperatures and, consequently, only informational values were presented for temperatures below 255 K. Since that time, CCE conducted low temperature measurements on specimens over the entire density range of the 80/81 lot. The data for the 80/81 lot are reported

in Tables 1, 2, and 3 and are the basis for this certification from 100 K to 330 K.

2
Table 1. CCE thermal conductivity data for lot 80.

^iTiean ^hot ^col d Density Thickness

^obs ppprpnl" rci LfCiio npvi ucv 1 (K) (K) (K)

3 (kg/m^) (cm)

-1 -1 > (mW-m -K ^)

310 32? U ^ L. • 560 -J \J\J 298.267 128. 67 2. 5367 36. 548 .68 310 322. 713 298.236 121.14 2. 5367 36.397 .81 325 337.826 312.867 121. 12 2. 5372 38. 1 74 .60 119 131. 157 105 QOO 121.46 2. 5301 14. 396 -.09 141.303 116.067 121.44 2. 5304 15. 604 -.26

139 151.448 126.301 121.43 2, 5307 16.936 .29 167.898 136 545 121.41 2. 5312 18. 563 .39

i uo 1^1. C.C\J 95. 755 11 ?1C J. . 47T / 2. 5298 1 3 . 2 79 169 181.980 1 56 650 121.38 2. 531

7

20.412 -. 52

1 7Q 1Q1 Q4Q 1 66 843 121.37 2. 5320 21 . 587 -.39

1i -J J 171. 760 146.477 121 .40 2. 5314 19. 147 -. 92 190 202.213 176.964 121.35 2. 5324 22. 760 -.20 200 212. 243 187 005 121.33 2. 5327 23.864 -.12

210 222.335 19 7.070 121.32 2. 5330 24 . 9 70 .04 220 232.403 207.215 121.30 2.5334 26.063 .18 230 242.446 217.266 121.28 2. 5337 27.150 .32 240 252.481 227. 356 121.27 2. 5341 28.241 .45 250 262. 534 237.443 121.25 2.5344 29.313 .46 275 287. 758 262. 587 121.21 2. 5354 32.047 .32 300 312. 791 287. 758 121.16 2. 5363 34.865 -.01 300 312.829 287.870 144. 58 2. 5363 35. 592 .20

oc u 31 3 013 144. 53 2 . 53 72 38. 673 .18 108 121. 140 95. 713 144. 95 2. 5298 13.812 -.16

118 131.138 105. 792 144.93 2. 5301 14.864 -1.22

128 141. 161 115. 748 144.92 2. 5304 16.023 -1.48

139 151.599 126.064 144.90 2. 5307 17.394 -. 75 152 167.936 136. 123 144.87 2. 5312 19.293 .94 159 1 71 . 941 146. 574 144.86 2. 5314 20. 186 1.00

1 69 181.987 156. 712 144.84 2.5317 21.339 .81

1 79 192.000 166.873 144.82 2.5320 22.481 . 72 190 176. 986 144.81 2. 5324 23. 618 .69 200 187.044 144. 79 2. 5327 24.546 .03 210 222.306 197.105 144.77 2.5330 25.668 .25 220 232.246 207.099 144.75 2.5334 27.020 1.38 230 242.399 217.299 144.73 2. 5337 27.845 .50 240 252.340 227.314 144.71 2.5341 28.829 .28 250 262.529 237.387 144.69 2. 5344 29.958 .46 275 287.641 262.507 144.63 2.5353 32. 754 .54 230 242.345 217.132 144.73 2. 5337 27. 723 .11

Percent Deviation = (^obs'^cal c^^^°/^calc

3
Table 2. CCE thermal conductivity data for lot 81.

T

(Tiean not CO 1 U Density Thickness ^nhQ UDb Percent Devi

(K) (K) (K) (kg/rn-^) (cm)

1 1 (mW-m" -K"-^)

"^99 c;fi9

•JL.L. • OOc 9Qft 90"^ 1 A9 A 7 i t£ . t / 9 Ci'2fi7 £. OOD

/

00. "^fi Oftfi yoo ftA . Ot oil "^99 Q1 fi cyo. 9Qft 1AQ ity ioo 1 ftn . ou 9£ . R'^fi7 000/ "^fi 9 7*3 00. £ /o - Rl . Oi

1 n 7 i u /1iiy.'+y't 1 Q AQA Ck'X yo. ft9 oL 711ioo. "2^ O'^ yo 9 Ci90ft £ . 0£yo 1

"3 fiA'3 iO. DtO 1 77 i . / /

1iOU"^n itt • H /

U

n c; 070 1 "^fi ftO £ * OOU 0 11 fi0. AfiO 1 03 1 "^n i • ou

1itOZL« 1 fin 9"^^ iOU. cOO 1iot. -3A Q 7ft y /o i 00. 0 0 £. 00 iU 1iO.ft £00 9K'^ _— . A7t / 9^iU1 n c; 7Z1

. 0 /t 1 ftc; 9 71 ioo. ^1 /i 1 7fi 77 iO 0. / / 9 c:'?9fi £. 00£0 9A£t.UtO nAft - . 00

0

9-27 tO fioy / • \JJ 1 CIO. JOO IOU. 1 fi 79/

£

9 S'^'^ fi 97 1 RQ . A9t £ 9RQ f^nd doo . Dty 1 "^fi fift £ . JOtt 9Q£5 fiftA . OOt fil . Oi ^ot 9ftZl

• 009 yu£ 9 fi^ A fiA ^ 00 . t Ot 1iOO. "^fi fi'3 00 £. 0000 0£"^9 "^A? . OtO 9ft . £0 ouy "^nQ . ^tu 9An 9ftfi ^0 0. OUO 1ioo. "^fi Rft 00 9 c;'3fi9 £ . 000£ Ot"^A QAfi . yt

0

-. 1iOft 0 i 0 0^0 • U DO out. ^DA At 7Q/y 1iOO. "^fi RAOt 9 R'^fiO £ . oooy 00. "^fi Q7A y /t _~ 71 . / i OoD "2^7 ft9'2 Of / • OcO '29A nft7 o^t . uo

/

iOO. DU 9 R'^ 77 £ . 00 / / "20 "^Aft oy . oto - on . yu 000 '2Aft n 1

Q

OM-o. uiy Oct '39A nft7 . uo

/

1 "^fi c:n ioo. ou 9 ^"^77 £ . 00 / / oy . 000 _~ 91 . £ i 00 D

"247 771 OH- / . / / i o^t.uyy '29A nao 1 "^fi Rn io 0. ou 9 R'^ 77 £ . 00 / / "30 Rftft oy . 000 - . 90£y ouy "200 1 7ft

. i /o £00. 9ftfi fi'31 OOi 1 "^fi Rft i 00. 00 9£ R'2fi9 . 000£ ot"^A 0fi9 . y o£ ~ . i 0 £oy . /ot 9'3ft ftc;c: £00.000 1 "^fi fift i 0 0 . 00 £ . OOtt 90£y RA1 . oti . nRuo

9ZIQ coy • / to £00. ooo T^fi ioo. fift 00 9£ . R'^AA JOtt 90£^ • S77 J /

/

1 7 9Qft ouy "200 "21 1 . oi i

9ftfi £00. AAI Oti 1ioo. "^fi Rft 00 9 R'3fi9 £ . 00 0£ Ot2 A . ftotyAO -~ . A7t / 000 oto. ^io 0£t 7 9A n Q 7 . uy

/

1 "^fi Rn ioo. ou 9£. 00 77/ / 70 R'2fi oy . 000 _

. ty/I Q ou / oiy ^i Q 99n

.

clm 9QA c:fi9 £yt . 00£ 1iOO. ^fi Rfi 00 £ . 00 00 00. "^fi ftAft oto 9£ . Ofi UD

7n 7 ou /

"21 Q 99A Oiy. cc.'^ 9QA c;fi9 £yt. D0£ 1 "^fi c:fi iOO. 00 £. 0000 00. OiO 1 1 fi i . i 0 oiy OtO. OOcj 9QA £y fi^Q t . ooy 1iO"^fi0. otRA 9£ . 00R'^ 7n/U 0

"^7

/ • 0^fvK DO ~ . 1

1

0 iiJ OH-0 • 0 / y 9QA ^^f^ft £yt . ooo 1iO"^fi0. RAot £9 . R'^ 00 7n/ U

'^7 - nfi OOi ^A"? A1 Q OH-0 . M-iy Oiy. ^l Q 11ft iio 1 "^fi Rl iOO. Oi 9 ^"3 7c; £.00/0 ^Q A1

1

oy • tii 7fi . / D OOi Of"^A"^0. AAn ft

u

Oiy. '2 10 cuu 9nn 1 "^fi c;i iOO. Oi 9 R"? 7c; £ . 00 / 0 oy"^0

. AAfi tto ft'-? . 00 OOi oto. "2 A "2 Afift too Oiy. "310 ££0 99fi 1 '3fi c;i iO 0. Oi 9£ • 00R'^ 7R/ 0 oo. "^ft ft'30 ooy -~ . 79/ £ OOi OHO. DOU Oiy "210

. 917 £ i /

1 t^ c;n io D. ou £. 0000 "20 9c;fi oy . £00 "^0

. oy OOi OtO . OOD "310 19 7 Oiy . i£

/

iO / . 00 9 Rl ftA £ . OiOt 00. 0 /o 1 Afi -i • to iUD 1 1 Q noft iiy . uyo o'2 yo. Ann tuu 1 "^fi 0'2 iOD. yo 9 c:9Qft £. 0£yo 1

"3 '3n9 iO. 0U£ - 00"^ft

1 1 Q i iy 1 "3 1 1 7Q iOi . i /O 1 ofi 1 nft iUD. iUo 1 "5 fi 01 iOD. yi 9 R^ni £. OOUi 1 A OftA it. yot 09 . y£

i io 1 1 1 A 7 iOi . i t / inc; cft 7 iUD. Oo

/

1 "^fi 01 iOO. y i 9 R^ni £. OOUi 1 R n9ft i 0. U£0 1 '20 i . oy

i iO 1 "21 01 A iOi . Uit inc; iU 0. cmOUi 1 "^fi 01 io 0. y

i

£. OOUi 1 A ^ftc; it. 000 _9 0"^ ~£ . yo ioy 1 Rl fil Q iDi. Oiy 1 9fi A9 7 i£0. t£ /

1 2fi ftft ioo. 00 £. OOU / i1 7/. AAn ttu fiA . ot 164 176.850 151.718 136.83 2.5315 20.217 -.69

184 197.109 171.842 136.80 2.5322 22.380 -1.27

210 222.063 197.116 136.75 2.5330 25.070 -1.20 235 247.568 222.427 136. 71 2.5339 27.937 -.30

249 259. 715 238.762 136.68 2.5344 29.693 .59 250 260. 700 238. 799 136.68 2.5344 29.472 -.35

250 260.934 238.830 135.66 2.5535 30.094 1.77

Percent Deviation = (Us'^cal c^^^^/^calc

4
Table 3. CBT thermal conductivity data for lot 81.

TmeanT'hotT'cold uenb 1 ty 1 m CKness

Percent Devi ^Kg/m ; (cmj ^mw m 'N )

29 7 309.109 284.901 122.30 2.5220 34.471 -.11 303 314.616 290.679 133.50 2.5590 35.546 .15 297 308.886 284.818 128.60 2.5310 34.453 -.61 325 336.112 313.591 128.80 2.5270 38.113 .06 255 265. 766 243.950 128.70 2.5290 29.552 -1.19

324 335.811 312.971 120.60 2.5390 38.020 .56 297 309.217 285.258 120.40 2.5680 34.457 -.08 256 267.123 245.808 120.80 2.5350 29.734 -.42 326 336. 654 314.677 136.70 2. 5530 38. 508 .26 297 309.379 285.408 136.80 2.5520 34.713 -.69 297 309.021 285.536 112.60 2.5250 34.332 .17 255 265.517 243.653 113.30 2.5260 29.204 -.85

327 338.088 316.088 141.50 2.5720 38.495 -.58 297 309.408 285.056 141.50 2.5720 34.853 -.60 258 268.459 246.639 141.50 2.5730 30.152 -1.30

314 326.265 302.564 137.80 2.5790 37.063 .06

291 302. 743 278.327 137.40 2.5010 34.003 -.46

279 289.249 268.599 132.90 2.5690 32.325 -1.12 305 317.058 293.551 133.10 2.5640 35.928 .35

318 329.630 306.632 119.40 2.5400 37.090 .25 303 314.816 290.667 119.40 2.5400 35.167 .15 269 279.396 257.635 133.70 2.5560 31.182 -1.13 326 337.591 314.999 135.90 2. 5600 38.337 -.34

302 314.482 290.506 136.90 2.5510 35.371 -.55

327 338.448 315.835 141.40 2. 5750 38. 706 -.04 297 309.336 285.056 141.60 2.5730 34.994 -.19 258 269. 522 247.073 141.40 2.5740 30.133 -1.63

297 308.844 285.114 112.50 2.5270 34.277 .12 289 301.164 277. 573 133.10 2.5280 33.697 -.61

314 324.535 302.498 133.10 2.5280 33.846 .12 297 308.933 285.002 131.30 2. 5790 34.901 .43 304 315.950 292.434 131.30 2.5800 35.893 .77 297 309.087 284. 733 126.40 2.5430 34. 776 .48 297 308.756 284.777 128.40 2.5300 34.843 .56 275 284.907 264.978 128.60 2.5260 31.894 -.69

iation

Percent Deviation =

5
4. Data Analysis

This report is the basis of the certification of SRM 1450b over the extended temperature range from 100 to 330 K with air as the fill gas at atmospheric pressure.

To provide a basis for the certification, a model was selected and optimized

to represent the data for lots 80 and 81. A variety of models from the litera- ture were examined for this purpose. None of them proved adequate for the entire

temperature range of this certification. As a consequence, an empirical modification of the form presented in the previous certification by Siu and Hust [2] was obtained. This model described the 114 data points from the 80 and 81 lots with no systematic deviations either as a function of temperature from 100 to 340 K or a function of density from 113 to 145 kg/m-^. The model is given by

equation (1).

3

2 x(T,p) = + a^p + a3T + a^T"^ + a^ exp -[(T-180)/75] (1) where the values of the parameters, a-j , are given in Table 4, p is the bulk density in kg/m-^, T is temperature in K, and X(T,p) is the apparent thermal conductivity in mW*m"l'K" . The deviations of the data from this model are shown in figure 1 as a func- tion of temperature, and in figure 2 as a function of bulk density. Two times the standard deviation computed from the residuals of the fit, 2s, is 1.5%. For illustration, values of x(T,p) are calculated and plotted in figure 3 as a func- tion of temperature at a density of 130 kg/m-^, and in figure 4 as a function of density at a temperature of 300 K.

5. Comparisons

Prior to 1980 measurements were conducted at CCE on several specimens from

lots 58 and 70 at temperatures ranging from 100 K to 330 K. In addition, the CCE measurements were conducted with various fill gases (air, nitrogen, argon and helium) and over a range of fill-gas pressure from atmospheric pressure to high vacuum. The CCE measurements also involved a range of temperature differences between the hot cold plates from as small as 10 K to as large as 100 K. These variations in test conditions were helpful in separating the heat transfer

mechanisms in this material. The data obtained prior to 1980 by CCE have been reported [7, 8, and 9].

To facilitate comparison equation (1) was also fitted to the atmospheric

pressure data obtained by CCE with air and nitrogen as fill gas for lots 58 and

70. The data are listed in Tables 5 and 6. The coefficients for each fit are listed in Table 4. The large interlot variation of the a^ parameter in Table 4 is noted. This indicates that the radiant heat transfer is a small part of the

total in this material. The deviations of the lot 58 data from the model are shown in figure 5 as a function of temperature, and as a function of density in figure 6. No systematic

trends are observed for either variable. Two times the standard deviation of the data, 2s, is 2.1%.

6
Table 4. Coefficients determined by least squares fitting of equation (1) to the indicated data sets. Coefficients for 80/81 lot^ 58 lot'^ 70 lot^

i CBT & CCE CCE only CCE only

1 -2.228 -3.002 4.935

2 0.02743 0.04137 0.034

3 0.1063 0.1030 0.1128

4 64.73 X 10"^ 6.579 x 10"^ -56.42 x 10"^

5 1.157 0.4551 0.6315

NOTE: Equations describing the CBT data on the 58, 59, 61 and 70 lots are reported by Si u [3]. \

a - The experimental data are listed in Tables 1,2, and 3.

b - The experimental data are listed in Table 5.

c - The experimental data are listed in Table 6.

7
Table 5. CCE thermal conductivity data for lot 58. T

irean T'hot

T'cold Densi ty Thickness

^obs Percent Devi;

11^^

1 it n/n\^ \ \<g/m ) (cm) ^inH'in •^ ) 302 314.673 289. 783 127.07 2. 5900 33.329 -.82 302 314.630 290.047 127.07 2.5900 33.258 -1.07

104 112.198 95.327 127.07 2.5900 12.750 -2.85

118 130.161 106.128 127.07 2.5900 14.503 -1.13

171 182.074 159.135 127.07 2. 5900 20.024 -1.37

225 236.819 213.318 127.07 2.5900 25.688 -.54 275 285.470 264.168 127.07 2.5900 30.726 -.22

273 28 5. 724 260.876 127.07 2.5900 30.362 -.92 230 248.759 210.312 127.07 2. 5900 26.172 -.37

251 256.752 246.112 127.07 2.5900 28.235 -.73 274 285.331 262.523 127.07 2.5900 30.653 -.17

239 244.066 233.597 127.07 2.5900 27.465 1.00 239 244.092 233.571 127.07 2.5900 27. 301 .40 273 285.589 260.570 127.07 2.5900 30 . 787 .54

101 110.958 90.614 127.07 2.5900 12.791 -.03 224 235.378 213.198 127.07 2.5900 26.050 1.15 273 285.173 260.691 127.07 2.2900 31.070 1.50

178 197.529 159.054 127.07 2.5900 21.169 .41 178 197.526 159.032 127.07 2. 5900 21.262 .85 99 106.418 91.026 127.07 2.5900 12.639 .53 99 106.430 90.893 127.07 2. 5900 12.541 -.20

122 134.455 110.134 127.07 2.5900 14.983 -.89

122 134.431 109.981 127.07 2.5900 15.316 1.37

172 184.917 159.503 127.07 2.5900 20.538 .36 172 184.938 159.565 127.07 2. 5900 20.571 .50 97 104.042 90.264 127.07 2.5900 12.155 -2.05

121 134.299 108.344 127.07 2. 5900 15.381 2.40 147 159.669 134.459 127.07 2.5900 18.060 1.48

198 210.271 185.369 127.07 2.5900 23.186 .37 248 260.628 235.379 127.07 2.5900 28.284 .64 297 308.983 285.709 127.07 2.5900 33.292 .58 297 309.110 285. 715 127.07 2.5900 33.122 .05 297 308.941 285.691 127.11 2. 5892 33.696 1.78 297 308.996 285.674 127.11 2.5892 33.342 .73 29 7 308.993 285. 790 147.23 2.5892 34.267 .96 297 309.168 285.787 147.23 2.5892 33.872 -.22 297 309.059 285.820 147.23 2.5892 33.838 -.31 297 308.969 285.818 147.23 2.5892 33.852 -.25 147 159.777 134.172 147.53 2.5839 18.661 .17 198 210.061 185.095 147.43 2.5856 23. 791 -.54 248 260. 606 235.579 147.33 2.5873 28.968 .06 297 309.021 285.894 104.90 2.5892 32.548 1.09 248 260.607 235.369 104.9 7 2.5873 27.048 -.52

100 108.078 92.556 105.17 2.5825 12.071 1.94 147 159. 732 134.898 105.11 2. 5839 16.988 .45 198 210.356 185.872 105.04 2.58 56 22.061 -.72 99 104.536 93.999 114.78 2.5824 12.303 1.48 147 159.816 134.854 114.71 2.5839 17.248 -.36

198 210.341 185.143 114.64 2.5856 22.677 .43 247 256. 779 238.144 114.56 2.5873 27.591 .22 297 309.002 285.860 114.48 2. 5892 32.860 .83 298 309.022 286.138 114.48 2.5892 32.274 -1.01 298 309.135 286.178 114.48 2. 5892 32.434 -.54 349 361.286 336.523 114.39 2.5912 38.204 .66 310 322.820 298.163 116.85 2.5367 33.631 -1.20 147 160.100 134.847 117.11 2.5310 17.078 -2.03 198 210. 760 185.175 117.03 2.5326 22.381 -1.43 245 255.245 234.940 116.97 2.5340 27.274 -.44 298 309.557 286.407 116.87 2.5362 32.2 70 -1.46

298 309.664 286.398 114.43 2.5902 32.479 -.51

Percent Deviation = {>^obs-\a]c^^°^^^ca]c

8
Table 6. CCE thermal conductivity data for lot 70. Tmean no L CO 1 u Density Thickness

ODS Percent Devi a (K) (K) (K) (kgV) (cm) (mW-m" -K'-^)

00/1 "31 0 3^4. oi8 on Q n 7n d^o, y /O 1 90 CK ido. 00 0 coon d. booO OA nn9 o4. Oy^: 9 c -.00

00/1 'i CI ono 7no ^lyo. I^d TOO C C Ldo* Ob 9 coon ^1 . booO 90 0 cn 33. 8 by 1 nn -1 . 00

oil oil 6d6. 1 b4 on 7 one d^ /. 8yo 100 c c ld6. 00 0 coon ii. b8o0 on 9n 7 34. ^y / c c

. bb 188 249. 637 125. 587 123. 65 2. 5880 00 0 00 22. 228 1 . 90 165 on/1 1; 7C ^:04. b /b 10c C 71 ido, o/i 1 9 0 C C i^o. Ob 0 coon ^. booO in 0 7n ly.o/y 1 cn 1. by

1 CO 15o 1 on m c ioO.Oio 1 9 C 90 C i^b. dob 1 9 0 cc Ldo, 00 9 coon booO 10 0/11 lo. £41 n9 139 1 CO 1 cc lb2. ibb 10c 0/11 l^ib. ^41 1 00 cc 1^:3. 6b 0 coon ^. b880 1 c c/i

n

16. 640 on -. 2y

lit; iio 19 7 9Q K id / ,doo 1 no nci iU^. ybi 100 cc

i<io. Ob 9 CQQn d . booU 1/1 n 79 14.0 Q 7. y /

1 OA IOC no 1 1 1 n KQfi iiU. boU 1 00 ct; i£0. Ob 9 CQQn d. booU 1 c 907 1 Q/l i .o4 144 1 CO m 0 Ib8.0i3 ion nn

i

130. yol 100 cc 1^3. 6b 9 coon d, b880 1 7 7ni

1 /. /Ol 1 n c1. y6

1 71 i /i

1 on 00c io4. doO i bo. oo4 1 9'3 i^o. Ob 9 KQQn ii. booU on n cn ^U. 404 /I 9 , .40

1 Q 7 OflQ cn9 100 Q91 100 cc i^>3. Db ii. booU 99 9t;t; do. doo 7C . /O

9 on ooQ cnQ doy . ouy 1 QQ /I n t; iyy. 4Ub 1 9 '3 ico. Ob 9 t;QQn c . booU OC OQQ db. doo -. 9Q^0 ocQ Q7(; dby . y /b 9 1 Q 9*3 t; 199 (^C^ i£0. Ob 9 t;QQn

(1 . booU 9 7 9 K9 ^ /. obo 1 1 . 11 cod OC7 70/1 do/

,

/o4 OA c; 9 cc ^:4b. doo 1 9*3 cc: Ldo, 00 9 KQtfn ^1. booU OQ cc/i<:o. 004 CO . oy

0 CO ^08 0 CO /I on one ~i(\n d'\b, /y4 TOO c c 1^:3. 6b 0 coon d, b880 9n 1 C9 ^y. Ib3 9 c

. ob 000 ono /ir^i 30^1. 401 0 C/I C 71 d4 . b /

1

1 00 cc 1^3. bb 0 coon d, b880 01 C 0 7 31 . b3 / ni .01 doo OQQ OCQ dvo, obo 9 71 Qf;^; /i . ODD 1 00 CK ido. Ob ^. booU 91 79Q Oi

.

/d^ 1 A

. 14

"3 1 n oiO OOO /ICC 4bo on 7 c 0/1 ^ly /. bo4 100 c c idO. 00 9 coon ^. booO OA CCQ o4. bby 1 91 1. ol

"311 oil 000 QQ/I o^io. yy4 OQQ C/1 /I iiyo. b44 1 99 CC i^io. Ob 9 CQOn ^ . booU OA t;i 7 o4. bi / QQ . yo iod 0/10 0 cc o4o. ODb oon Q01 1 99 Kt; LdO. 00 9 KQnn ^. byuu 0 c oon OO. dd)3 OA . ^4 300 oil 010 311. ol<: 007 no

n

do 1 ,'\6'\ TOO C C 1^:3. bb d. byoo 00 091 7C -. /O

JUL) 01 1 Q91 9Q 7 (^0 7 do 1 .Od 1 199 c;f; LdO. 00 9 c;Qnn d. byuu 99 Q91 oc. yoi A7

'inn "31 1 7Q<; oil. /oo 00 7 01

n

^0 /. oiU 1 99 Kt; i^o. bb 9 c;Qnn ^1. byuu OOtUO/ 99 n(^7 -. 09Ud 9QQ dvv "31 1 0*3 7 Oil. Oo / 9H 7 0 77 do / .\J / /

1 99 c;f; icO. DO 9 ciQnn c. oyuu 00. 99 n9n u^u 1 1 -. i i ouu

010 n/1 n oi^. U4U 00 7 ceo CO / . Dbo 1 99 t;c; i^o. bb 9 i^Qon ^. byuu 99 Q1 c; o<:. oiD -. O'f oUU oil no 7 oi i . y^i / OQ7 ccn do /

»

ObU 199 idO» 00 9 t;Qnn d. byuu 99 Q^;t; od . yoo -. 9 7 0 / noyy

1 1 n 7cn 110. / oO 07 c 7/1 8 /. b/4 TOO C C 1^3. bb 9 cnnn d, byoo 1 9 n/1

9

id.04o -. 99<1C yy

1 1 n no 7 110. y3 / 07 /11c 8/. 41b 100 c c 1^:3. bb 0 cnnn ^1. byoo 1 1 Q/1 C ii.y4b 1 0 c; -l.Ub

iUo 191 1 O'i idl, ido n/i con y4. boy 199 i£0. bb 9 conn ^1. byou 1 9 QKI i^i. ybi -11 09 . (Jd lib IOC /ICO iob.4bo n/i n 0 ~i y4. 43

/

TOO C C 1^3. bb 9 cnnn byoo 1 9 Q9 C io.O^lD -. CQOo

1/10 143 101 0 cn 181. 86y 1 n /I "7n n 104. /oy 100 c c 123. bb 2. 5900 1 7 n C9

L /.(JOd c;9 -. Od

1 "39 i od 1 <^'3 QQQ ioo. yyo QQ 799 yy. fdd 1 99 c;k i^io. bb 9 t;Qnn

<i. byuu 1 1; 77n ID. / /U - . DO

159 177.654 140. 721 123.55 2.5900 18.830 -.99 158 177.228 138.651 123.55 2. 5900 18.591 -1.52

160 177.468 143.271 123.55 2.5900 19.115 -.20 214 249.081 178.859 123.55 2.5900 24.518 -.97

222 243.068 201.315 123.55 2.5900 25.396 -.89 215 228.239 201.674 123.55 2.5900 24.683 -.96

248 258.948 236. 764 123.55 2.5900 2 7.840 -.99

Percent Deviation = i\^s-\a^c^^^^^\a^c

9
2.5 I

' ' '

I

'

' ' '

I

' ' '

I

' ' '

'

I

' '

I I

' ' '

'

I

'

I ' '

I ' ' ' '

I 2s = 1.5% A

1.5 A O

A A ^

0.5 A° O O

o

o ^ o ^ ^ o ^ 9

n n

0.5 A

A A

1 - O

1.5 o

2.5

100 125 150 175 200 225 250 275 300 325 350 TEMPERniURE.K

Figure 1 Deviations of measured apparent thermal conductivities from values calculated with equation (1) versus the mean temperature of the measurements for densities from 113 to 145 kg/m^

O - CCE Lot 80 A - CCE Lot 81

- CBT Lot 81

10
2.5

DENSITY, kg/m^

Figure 2 Deviations of measured apparent thermal conductivities from values calculated with equation (1) versus the bulk density of the speci- mens for mean temperatures from 105 to 340 K O- CCE lot 80 A - CCE Lot 81

- CBT Lot 81

11
40 I

'

I

I M I 'I '

I

'

'

'

'

I

' '

I I

I

r I I I I I I I I I I I I I I I I I I I I I I I I I I I I I I I I I I I I I I I I I I I I I I I I 1

100 125 150 175 200 225 250 275 300 325 350 TEMPERnTURE.K

Figure 3 Thermal conductivity as a function of temperature at a density of 130 kg/m^ as calculated from equation (1) for lots 80 and 81

12
35.5 I ' ' ' '

I

I 'I I I

I

' ' I

I

' I I I

I

I I I '

I

34.5 ' ' ' I

' i 110 115 120 125 130 135 140 145 DENSITY, kg/m^

Fiyure 4 Thermal conductivity as a function of bulk density at a temperature of 300 K as calculated from equation (1) for lots 80 and 81

13
2.5 ' '

1

'

' ' '1 ' ' ' '

1

' ' '

1 ' ' ' '1

' ' ' '

1

' ' ' •

1

' ' ' '

1

' ' ' ' 1 o

= 2.1%

2 o

- o

1 q o o o

o o o

1 o o

_ o o

0.5 o

o QO o

o

o

o - o

o

o o 0 u

o 8 o o

-0.5 o o °o §

o o

-1 o

o o

• o

-

-1.5 o o o -

-2 o o

-2.5

-3 o

1 1 1 1 1 1 1 1 1 .1 1 1 1

. . 1 .

1 1 1 1 1 1 1 1 1 1 t 1 1 1 1 1 1 1 1 75 100 125 150 175 200 225 250 275 300 325 350 TEMPERRTURE^K

Figure 5 Deviations of measured apparent thermal conductivities from values calculated with equation (1) versus the mean temperature of the measurements for lot 58 as measured by CCE for densities from 105

to 148 kg/m^

14
2.5 . '

' ' '

1

'

'

' '

1

' ' ' '

1

' ' '

1 ' " ' '(b

' '

1

' ' ' '

1

' ' '

' 2s = 2.1%

2 O o

1.5 o oo

1 O

o

o

o

o

o

o

-

0.5 7 o o

0 o

8

oo

i

-0.5 oo

o©

o

o

o

o

O

"

-1 o

o 8

-1.5 o

-2 o o

-2.5

-3 1 1 1 1 1 1 1 1 o

1 1 1 1 1 1 1 1 1 1 1 1 100 105 110 115 120 125 130 135 140 145 150 DENSITY, kg/m^

Figure 6 Deviations of measured apparent thermal conductivities from values calculated with equation (1) versus the bulk density of the speci- mens for lot 58 as measured by CCE for mean temperatures from 100 to 350 K

15
The data for lot 70 were previously reported by Smith and Hust [7, 8, and 9], but were smoothed with a different model. For consistency, the above model

is used for smoothing. The coefficients are listed in Table 4. The deviations

of the lot 70 data from the model are shown in figure 7 as a function of temperature. No systematic trends in the deviations are observed. For the lot 70 data

the density term in the model was taken to be the average value for lots 80/81

and 58. This was done because the measured densities ranged only from 123.6 to 125.7 kg/m^ which was insufficient to determine a coefficient for the density

term. As a consequence, deviations versus density are not plotted. Two times the standard deviation of the fit, 2s, is 1.8%.

It is desirable to compare the various lots of the NBS glass fiberboard

material (now exhausted) as well as the results from measurements on similar

materials from other laboratories to the present 80/81 lot designated as SRM 1450b. It is most convenient to make these comparisons of X(T,p) through the

use of the models. The baseline for these comparisons will be the values as calculated from the model for the 80/81 lot. Figure 8 compares the following equations to the lot 80/81 equation:

1. equations for lots 58, 59, 61, and 70 from Siu [3],

2. equations for lots 58 and 70 from this work,

3. equations for the European SRM as reported by DePonte [10] for a density

of 88 kg/m3. The data reported by Siu [3] on lots 58, 59, 61, and 70 show that the mea- sured values of apparent thermal conductivity (and therefore thermal resistance)

within each lot agree to +2% from the mean value at a given temperature and density. Th smoothed mean values for each of the four lots differ slightly in value

and slopes but not appreciably more than the combined measurement and material uncertainty associated with each lot. Figure 8 shows good agreement between the present certification for the tem- perature range 100 to 330 K and the previous certification for the temperature

range from 255 to 330 K. Figure 8 also shows that lot 80/81 (SRM 1450b) differs

significantly from all of the previous NBS lots as well as the European SRM. The latter lots are in agreement with each other to within about ±l7o as measured by CCE, CBT, and the European participants.

The reason lot 80/81 differs from the other lots is not clearly understood.

However, it is known that the phenolic resin content of lot 80/81 is considerably

lower than the previous NBS lots: about 14 wt% compared to about 20 wt%. Other differences, such as in fiber diameter and orientation, are also possible ex- planations, but these characteristics have not been determined.

6. Certified Values For certification purposes values of thermal resistance, R, are desirable. Values of R at a thickness of 0.0254 m (l-|^in), Rq, calculated from equation (2) are listed in Table 7 in units of m^'K'W" •

16
I

' ' ' '

I

' ' ' ' I

' ' ' '

I

' ' ' '

I ' ' '

'

I '

'

'

'

I ' ' ' ' I

' ' ' '

I 2s = 1.8%

o

°

o o

o o

o o

o

75 100 125 150 175 200 225 250 275 300 325 350 TEMPERRTURE,K

Figure 7 Deviations of measured apparent thermal conductivities from values calculated with equation (1) versus the mean temperature of the measurements for lot 70 as measured by CCE for densities from 123.6 to 125. 7 kg/m3

17
175 200 225 250 275 TEMPERRTURE.K

Figure 8 Comparison of various lots of glass fiberboard with respect to the equation for lots 80 and 81 as a function of temperature at a den- sity of 130 kg/m^ except for the European SRM which is for a density of 88 kg/m^, percent difference =

(^i -^30/81 ^ ^^^^^80/81 o - SRM 1450b [2] O - Lot 70 [3] A - Lot 58 [3] + - Lot 58 CCE n- Lot 59 [3] x - European SRM [10]

V- Lot 61 [3] 5K- Lot 70 CCE

18
Table 7. Certified Values of Thermal Resistance of a 2.54 cm Thick Specimen,

Rq, as a Function of Density and Temperature (These values have been corrected for the thermal expansion of the measurement plates.)

Density (kg-m" )

Temperature

(K) 110 120 130 140 150

100 2.143* 2.094 2.049 2.004 1.961

110 1.946 1.906 1.867 1.831 1.795

120 1.780 1.747 1.714 1.683 1.653

130 1.640 1.611 1.583 1.557 1.531

140 1.519 1.495 1.471 1.448 1.426

150 1.416 1.395 1.374 1.354 1.334

160 1.327 1.308 1.290 1.272 1.255

170 1.250 1.234 1.217 1.202 1.186

180 1.184 1.169 1.154 1.140 1.126

190 1.126 1.112 1.099 1.086 1.073

200 1.074 1.062 1.050 1.038 1.027

210 1.028 1.017 1.006 .995 .985

220 .987 .977 .966 .956 .947 230 .949 .939 .930 .921 .912 240 .913 .905 .896 .887 .879 250 .880 .872 .864 .856 .848 260 .848 .841 .833 .826 .818

2 70 .818 .811 .804 .797 .790 280 .790 .783 .776 .770 .764 290 .762 .756 .750 .744 .738 300 .736 .730 .724 .719 .713 310 .711 .706 .700 .695 .690 320 .687 .682 .677 .672 .667 330 .665 .660 .655 .651 .646

*Rq values are in units of m^.K.W-l

19
= 0.0254/x(T,p). (2) The as-tested thickness will most likely be slightly different from 0.0254 m. The R value at different thicknesses, L, are calculated from

R = RqL/0.0254 (3) where R is the thermal resistance at the tested thickness and Rq is the certified value interpolated from the table or calculated from equation (2).

It should be noted that this material is certified only for thicknesses

within the range of the tests reported, nominally 2.54 cm (1 in). The specimens

should be in firm contact with the apparatus plates, but not under excessive

pressure. Excessive pressure can lead to both apparatus errors as well as mea- surable deviations from the certified thermal resistances. Compression of the specimen to a thickness less than 2.4 cm should be avoided. Values of thermal resistance of this SRM are expected to be within two per- cent of the computed values at temperatures from 250 to 330 K and increasing to three percent at 100 K. These estimates are based on the experimental data and include both material variability and measurement uncertainty.

7. Summary

New measurements are presented to extend the certification range of SRM 1450b [2] from 255-330 K to 100-330 K. A model is presented that describes

the data over the entire temperature and density range to within the imprecision

of the data. Comparisons of previously published values for similar material are presented.

8. Acknowledgments

This project has extended over a period of several years. During this time numerous people have contributed to this effort. M. C. I. Siu performed the mea- surements attributed to CBT in this report. D. R. Smith and A. B. Lankford con- ducted some of the measurements attributed to CCE. Keith Kirby and Lee Kieffer

provided support through the Office of Standard Reference Materials, OSRM. In addition, funding was supplied by the Department of Energy (DoE, ORNL) with the guidance of Ted Lundy and Dave McElroy.

9. References

[1] Hust, J. G. Status of thermal conductivity standard reference materials at the National Bureau of Standards. Proceedings of the 18th International

Thermal Conductivity Conference; Ashworth, T. , ed. Plenum Press, New York;

1985. [2] Siu, M. C. I.; Hust, J. 6. Standard reference material 1450b, thermal resistance-fibrous glass board. Nat. Bur. Stand, certificate, 1982 (avail- able from OSRM, NBS, Gai thersburg, Maryland).

20
[3] Siu, M. C. I. Fibrous glass board as a standard reference material for thermal resistance measurement systems, thermal insulation performance. ASTM STP 718. McElroy, D. L. and Tye, R. P., eds. American Society for Testing and Materials, 343-360; 1980. [4] ASTM Subcommittee C16. 30. Reference materials for insulation measurement

comparisons. Thermal Transmission Measurements of Insulation. ASTM STP 660,

Tye, R. P., ed. American Society for Testing and Materials, 7-29; 19 78. [5] Hahn, M. H.; Robinson, H. E.; Flynn, D. R. Robinson line-heat-source

guarded hot plate apparatus. Heat Transmission Measurements in Thermal In- sulations. ASTM STP 544, Type, R. P., ed. 167-192; 1974. [6] Smith, D. R. ; Hust, J. G. ; Van Poolen, L. J. A guarded-hot-plate apparatus

for measuring effective thermal conductivity of insulations between 80 K and 360 K. Nat. Bur. Stand. (U.S.) NBSIR 81-1657; 1982. 49 p. [7] Smith, D. R.; Hust, J. G. Effective thermal cnductivity of glass-fiber

board and blanket standard reference materials. Proceedings of the 17th International Thermal Conductivity Conference; Hust, J. G., ed. Plenum

Press, New York, 408-410; 1980. [8] Smith, 0. R. ; Hust, J. G. Effective thermal conductivity of a glass fiber- board standard reference material. Nat. Bur. Stand. (U.S.) NBSIR 81-1639;

1981. 28 p. [9] Smith, D. R. ; Hust, J. G. Measurement of thermal conductivity of a glass

fiberboard standard reference material. Cryogenics, Vol. 21, No. 7, 408-

410; 1981. [10] De Ponte, F. Standard reference materials in the European community.

J. Thermal Insulation, Vol. 8, 94-106; Oct. 1984.

/

21
(BS-114A (REV. 2-8C) U.S. DEPT. OF COMM. BIBLIOGRAPHIC DATA

SHEET (See instructions)

1. PUBLICATION OR REPORT NO. NBS/SP-260/98

2. Performing Organ. Report No. 3. Publication Date August 1985

4. TITLE AND SUBTITLE Standard Reference Materials:

Glass Fiberboard SRM for Thermal Resistance

5. AUTHOR(S)

J. G. Hust

6. PERFORMING ORGANIZATION (If joint or other than NB5. see instructions) NATIONAL BUREAU OF STANDARDS

U.S. DEPARTMENT OF COMMERCE

GAITHERSBURG, MD 20899

7. Contract/Grant No.

8. Type of Report & Period Covered Final

9. SPONSORING ORGANIZATION NAME AND COMPLETE ADDRESS (Street. City. State. ZIP) Same as item 6

10. SUPPLEMENTARY NOTES Library of Congress Catalog Card Number: 85-600566

Document describes a computer program; SF-185, FlPS Software Summary, is attached.

11. ABSTRACT fA 200-word or less factual summary of most si gnificant information. If document includes a si gnificant bibliography or literature survey, mention it here) The apparent thermal conductivity data that provide the basis for the certification

of glass fiberboard as an SRM of thermal resistance are reported and analyzed. New data

for the extension of the temperature range of this SRM to 100 K are included. Detailed

analysis and intercomparisons of previously described NBS and other published data are

given. These data are represented by an equation describing the dependencies of the data on temperature and density. Certified values of thermal resistance are given for temperatures from 100 to 300 K and densities from 113 to 145 kg/m^.

12. KEY WORDS (Six to twelve entries; alphabetical order; capitalize only proper names; and separate key words by semicolons) apparent thermal conductivity; density; glass fiberboard; Standard Reference Material;

temperature; thermal resistance

13. AVAILABILITY

Unlimited

I I For Official Distribution. Do Not Release to NTIS

fx] Order From Superintendent of Documents, U.S. Government Printing Office, Washington, D.C.

20402. Order From National Technical Information Service (NTIS), Springfield, VA. 22161

14. NO, OF

PRINTED PAGES 31

15. Pr

USCOMM-DC 6043-P80
Technical Pubttcations

Periodical

Journal of Research—The Journal of Research of the National Bureau of Standards reports NBS research ana development in those disciplines of the physical and engineering sciences in which the Bureau is active. These include physics, chemistry, engineering, mathematics, and computer sciences. Papers cover a broad

range of subjects, with major emphasis on measurement methodology and the basic technology underlying

standardization. Also included from time to time are survey articles on topics closely related to the Bureau's

technical and scientific programs. Issued six times a year.

Nonperiodicals

Monographs—Major contributions to the technical literature on various subjects related to the Bureau's scientific and technical activities. Handbooks—Recommended codes of engineering and industrial practice (including safety codes) developed in cooperation with interested industries, professional organizations, and regulatory bodies.

Special Publications—Include proceedings of conferences sponsored by NBS, NBS annual reports, and other

special publications appropriate to this grouping such as wall charts, pocket cards, and bibliographies. Applied Mathematics Series—Mathematical tables, manuals, and studies of special interest to physicists, engineers, chemists, biologists, mathematicians, computer programmers, and others engaged in scientific and

technical work.

National Standard Reference Data Series—Provides quantitative data on the physical and chemical properties of materials, compiled from the world's literature and critically evaluated. Developed under a worldwide pro- gram coordinated by NBS under the authority of the National Standard Data Act (Public Law 90-396). NOTE: The Journal of Physical and Chemical Reference Data (JPCRD) is published quarterly for NBS by

the American Chemical Society (ACS) and the American Institute of Physics (AIP). Subscriptions, reprints, and supplements are available from ACS, 1155 Sixteenth St., NW, Washington, DC 20056.

Building Science Series—Disseminates technical information developed at the Bureau on building materials, components, systems, and whole structures. The series presents research results, test methods, and perfor- mance criteria related to the structural and environmental functions and the durability and safety

characteristics of building elements and systems. Technical Notes—Studies or reports which are complete in themselves but restrictive in their treatment of a

subject. Analogous to monographs but not so comprehensive in scope or definitive in treatment of the subject

area. Often serve as a vehicle for final reports of work performed at NBS under the sponsorship of other government agencies. Voluntary Product Standards—Developed under procedures published by the Department of Commerce in Part 10, Tide 15, of the Code of Federal Regulations. The standards establish nationally recognized re- quirements for products, and provide all concerned interests with a basis for common understanding of the

characteristics of the products. NBS administers this program as a supplement to the activities of the private

sector standardizing organizations. Consumer Information Series—Practical information, based on NBS research and experience, covering areas of interest to the consumer. Easily understandable language and iUustrations provide useful background

knowledge for shopping in today's technological marketplace. Order the above NBS publications from: Superintendent of Documents, Government Printing Office, Washington, DC 20402. Order the following NBS publications—FIPS and NBSIR's—from the National Technical Information Service, Springfield, VA 22161.

Federal Information Processing Standards Publications (FIPS PUB)—Publications in this series collectively constitute the Federal Information Processing Standards Register. The Register serves as the official source of

information in the Federal Government regarding standards issued by NBS pursuant to the Federal Property and Administrative Services Act of 1949 as amended, Public Law 89-306 (79 Stat. 1127), and as implemented

by Fj(ecutive Order 1 1717 (38 FR 12315, dated May 11, 1973) and Part 6 of Title 15 CFR (Code of Federal

Regulations). NBS Interagency Reports (NBSIR)—A special series of interim or final reports on work performed by NBS

for outside sponsors (both government and non-government). In general, initial distribution is handled by the sponsor; public distribudon is by the National Technical Information Service, Springfield, VA 22161, in paper copy or microfiche form.
U.S. Department of Commerce

National Bureau of Standards

Gaithersburg, MD 20899

Official Business

Penalty for Private Use $300