Zircar Zirconia, Inc.
“Manufacturer of the original ZIRCAR products” ©

ZIRCONIA CYLINDERSTYPE ZYC

Zirconia Cylinders Type ZYCFEATURES• Rigid and Machinable• Silica Bond for Thermal ShockResistance• Our Most Economical ZrO2 Cylinder• Fibers Stabilized with ~10 wt% Yttria• Low Thermal Conductivity• Can be Cemented with Zircar Zirconia
Cement Type ZR-CEM• Can be Surface Hardened with Zircar
Zirconia Rigidizer Type ZR-RIG• Pre-fired and Organic FreeZircar Zirconia Cylinders Type ZYC are rigid, free standing refractory structures composedof yttria stabilized zirconia fibers that are bonded with silica. The material is evenly
bonded, allowing intricate shapes to be machined with tight tolerances. Type ZYC Cylinders possess low thermal conductivity and good resistance to thermal shock and are ideally suited for thermal insulation and protection applications under conditions of ultra-hightemperatures and severe environments.
ZYC is dimensionally stable to 1650°C although it can be used at higher temperatures inareas where additional sintering can be tolerated or as back-up insulation. It has good hot
strength up to 1400°C. ZYC is resistant to attack by most molten metals and has a highresistance to reaction with other oxide materials.
ZYC Cylinders are phase stabilized with yttria and therefore do not undergo the usualphase transitions associated with zirconia. Electrical conductivity at elevated temperatures
is also minimized with low density Zirconia fibers whereas dense Zirconia is an effective
conductor at elevated temperatures. ZYC does not couple with radio frequency (RF) radiation used in induction heating, but does couple with microwave energy.
ZYC has no organic binders and will produce no smoke or odor when heated.

Zircar Zirconia, Inc.
PO Box 287
Florida, NY 10921-0287
USA

Tel: 845-651-3040
Fax: 845-651-0074
email: sales@zircarzirconia.com
web: www.zircarzirconia.com

Product Data
Bulletin #A-G
January 2004
Page 1 of 6

Zircar Zirconia, Inc.
“Manufacturer of the original ZIRCAR products” ©

ZIRCONIA CYLINDERSTYPE ZYC
Shown below are SEM micrographs of a Zirconia Cylinder Type ZYC that show the silica
binder and porous structure of the material .
The micrograph on the left illustrates the ZYC fiber’s serrated surface structure that is characteristic of all of our Zirconia fibers and fiber products. The ZYC’s silica binder is also visible in the micrograph and appears as the solid cracked matrix behind the fibers. The parallel fiber orientation that results from the ZYC vacuum forming process is also evident inthe photo.
The micrograph on the right is an enlargement of the end of the fiber which is boxed inwhite in the picture on the left. The fiber measures approximately 7.5 microns across andis composed of grains that measure approximately 0.2 microns. The interior of the fiber ismade of individual sub micron grains. The silica binder has coated the surface of the fiberand has penetrated several grains deep into the fiber structure. Some porosity internal tothe fiber can also be seen in this view.

Zircar Zirconia, Inc.
PO Box 287
Florida, NY 10921-0287
USA

Tel: 845-651-3040
Fax: 845-651-0074
email: sales@zircarzirconia.com
web: www.zircarzirconia.com

Product Data
Bulletin #A-GJanuary 2004
Page 2 of 6Zircar Zirconia, Inc.
“Manufacturer of the original ZIRCAR products” ©

ZIRCONIA CYLINDERSTYPE ZYCCHEMICAL COMPOSITION
Zircar Zirconia’s Type ZYC is nominally 85 wt% ZrO2 + HfO2 and 10 wt% Y2O3. 1 - 2 wt%
hafnia, HfO2, occurs naturally with zirconia, ZrO2, and does not affect performance. Only
the highest purity starting materials are used to make Type ZYC minimizing trace oxides.
Trace Oxide

Typical Wt%

Trace Oxide

Typical Wt%

SiO2 (binder)

5

Al2O30.01

TiO20.14

Na2O

0.01

CaO

0.09

SnO20.001

MgO

0.03

Cr2O30.0005

Fe2O30.04

Ag2O0.0005

MACHINING INFORMATION
Zirconia Type ZYC has the consistency of soft chalk and can be cut or machined with avery wide range of tooling. For manual cutting, place the ZYC part on a smooth clean surface and hold it in place with gentle finger pressure. When close tolerances are not required and the amount of cutting is limited, small holes can be drilled by hand with a standard high speed steel twist drill rotated between the fingers and boards can be cut with aback saw. If closer tolerances are needed, holes can be drilled using a drill press andboards can be cut with a radial arm saw. Table saws are not recommended without a carrier board since the motion of the material over the saw bed will tend to abrade away thematerial. For very close tolerances and large amounts of cutting, CNC machining with solid
carbide or carbide tipped tooling is recommended. While quite soft, Type ZYC is very abrasive and will cause rapid wear of high speed steel tooling which over time could result in an
out of tolerance condition. ZYC boards can be held in place for CNC machining with avacuum hold down set up. Hot glue can also be used to fixture ZYC but will generally forma very strong bond that will pull away material from the machined part. Crystal Bond ™
which burns away cleanly when heated has also been used to fixture ZYC.
Zircar Zirconia, Inc.
PO Box 287
Florida, NY 10921-0287
USA

Tel: 845-651-3040
Fax: 845-651-0074
email: sales@zircarzirconia.com
web: www.zircarzirconia.com

Product Data
Bulletin #A-GJanuary 2004
Page 3 of 6

Zircar Zirconia, Inc.
“Manufacturer of the original ZIRCAR products” ©

ZIRCONIA CYLINDERSTYPE ZYCPROPERTIES & CHARACTERISTICS
Bulk Density, g/cc (pcf)

0.48 (30)Porosity, %91

Melting Point, ºC (ºF)

2200 (3992)

Continuous Maximum Use Temperature, ºC (ºF)

1650(3002)

Intermittent Maximum Use Temperature, ºC (ºF)

1700(3092)

Flexural Strength, (Parallel to thickness) MPa (psi)0.55 (81)Compressive Strength, (Parallel to thickness) MPa (psi)@ 10% Compression

0.21 (31)Outgassing in Vacuum

Nil

Dilatometric Softening Temperature, oC (oF) at 10psi

950 (1740)

Thermal Expansion Coefficient RT - 950oC (1740oF)(Perpendicular to thickness)

9 x 10-6/oC (5 x10-6/oF)

Linear Shrinkage (Perpendicular to thickness) , %1 hour at 1650oC (3002oF)

2.5

24 hours at 1650oC (3002oF)

4

Thermal Conductivity, (Parallel to thickness)
W/mK (BTU/hr ft2 oF/inch) at 400oC (752oF)

0.08 (0.6)

W/mK (BTU/hr ft2 oF/inch) at 800oC (1472oF)

0.11 (0.8)

W/mK (BTU/hr ft2 oF/inch) at 1100oC (2012oF)

0.14 (1.0)

W/mK (BTU/hr ft2 oF/inch) at 1400oC (2552oF)

0.19 (1.3)

W/mK (BTU/hr ft2 oF/inch) at 1650oC (3002oF)

0.23 (1.6)

Zircar Zirconia, Inc.
PO Box 287
Florida, NY 10921-0287
USA

Tel: 845-651-3040
Fax: 845-651-0074
email: sales@zircarzirconia.com
web: www.zircarzirconia.com

Product Data
Bulletin #A-GJanuary 2004
Page 4 of 6

Zircar Zirconia, Inc.
“Manufacturer of the original ZIRCAR products” ©

ZIRCONIA CYLINDERSTYPE ZYCAPPLICATION INFORMATION•ZYC is used in both resistance heated and induction furnaces. It is particularly suitedfor insulation in hot pressing, crystal growing and annealing furnaces.

•ZYC, as well as other ZIRCAR flexible and rigid insulating products, find use in a varietyof research and development high temperature applications.

•ZYC is used as radiation shielding in vacuum furnaces, replacing five or six metalshields without loss of insulation value. In processes where carbon contamination cannot be tolerated, Zircar Zirconia’s products are used instead of graphite felts and carbon
black as insulation.

•ZYC is excellent insulation for pipes or molten metal transporting and feed tubes.

•For cylindrical applications where silica is undesirable our zirconia bonded fiber materials ZYFB-3, ZYFB-6 and/or FBD are recommended.

ORDERING INFORMATION
Zircar Zirconia Insulation Type ZYC is available in standard sized Cylinders which arelisted on page 6 with their ordering item number. Please contact our Sales Department for
pricing and availability.
•To order one of our standard sized Cylinders specify the Quantity you wish to order ,the Item Number and Size.
For example: 12 each, Item # AG512, ZYC, 6" ID x 7" OD x 12”L.

•Custom sizes are available on request. Our forming process and machining capabilities allow a wide variety of custom shapes and sizes to be made. Please contact uswith your special requirements and we’ll be happy to provide you with a quotation.

Zircar Zirconia, Inc.
PO Box 287
Florida, NY 10921-0287
USA

Tel: 845-651-3040
Fax: 845-651-0074
email: sales@zircarzirconia.com
web: www.zircarzirconia.com

Product Data
Bulletin #:A-GJanuary 2004
Page 5 of 6Zircar Zirconia, Inc.
“Manufacturer of the original ZIRCAR products” ©

ZIRCONIA CYLINDERSTYPE ZYC

Standard Sizes

Item NumberCylinder, 1” ID x 2” OD x 6” LG

AG501

Cylinder, 1” ID x 2” OD x 12” LG

AG502

Cylinder, 2” ID x 3” OD x 6” LG

AG503

Cylinder, 2” ID x 3” OD x 12” LG

AG504

Cylinder, 3” ID x 4” OD x 6” LG

AG505

Cylinder, 3” ID x 4” OD x 12” LG

AG506

Cylinder, 4” ID x 5” OD x 6” LG

AG507

Cylinder, 4” ID x 5” OD x 12” LG

AG508

Cylinder, 5” ID x 6” OD x 6” LG

AG509

Cylinder, 5” ID x 6” OD x 12” LG

AG510

Cylinder, 6” ID x 7” OD x 6” LG

AG511

Cylinder, 6” ID x 7” OD x 12” LG

AG512

Cylinder, 7” ID x 8” OD x 6” LG

AG513

Cylinder, 7” ID x 8” OD x 12” LG

AG514

Cylinder, 8” ID x 9” OD x 12” LG

AG515

Cylinder, 9” ID x 10” OD x 12” LG

AG516

Cylinder, 10” ID x 11” OD x 12” LG

AG517

Cylinder, 11” ID x 12” OD x 12” LG

AG518

Cylinder, 12” ID x 13” OD x 12” LG

AG519

Standard Cylinder Tolerances: +/- 1/16” on ID and OD, +/- 1/16” on Length

Zircar Zirconia, Inc.
PO Box 287
Florida, NY 10921-0287
USATel: 845-651-3040
Fax: 845-651-0074
email: sales@zircarzirconia.com
web: www.zircarzirconia.com

Product Data
Bulletin #A-G
January 2004
Page 6 of 6