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

ZIRCONIA BOARDS, DISCS & CYLINDERSTYPE ZYFBZYFB Boards & Discs are Available in FourStandard Thicknesses.

FEATURES• Rigid and Machinable• High Purity Zirconia Bonded• Two Densities Available 30 pcf & 60 pcf• Extreme High Temperature Stability• 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 FreeType ZYFB Boards, Discs and Cylinders are rigid, refractory structures composed ofyttria-stabilized zirconia fibers that do not undergo the usual phase transitions associatedwith pure zirconia. Type ZYFB is ideally suited for thermal insulation applications underconditions of ultra-high temperatures and in a variety of severe environments. ZYFB isfired at a high temperature to impart good dimensional stability up to 1650°C and can beused at higher temperatures where some additional sintering can be tolerated. It has good
hot strength up to 1400°C and can be used as a self supporting setter for loads equal totwice its own weight up to this temperature.
ZYFB is available in two densities. ZYFB-3 has a bulk density of 30 pcf and possesses
extremely low thermal conductivity. ZYFB-6 has a bulk density of 60 pcf and is stronger
than ZYFB-3. Both are zirconia bonded and have exceptional resistance to oxidizing andreducing atmospheres at high temperatures. Zirconia does, however, lose a small amountof oxygen at very high temperatures in vacuum and inert or reducing atmospheres. This
reaction results in a color change from white to gray while most other properties remain essentially unchanged and insulation effectiveness is not impaired.
ZYFB has exceptional resistance to most corrosive environments. It undergoes little attackby molten alkali metal chlorides and carbonates at temperatures up to 700°C and withstands aqueous solutions of alkali metal hydroxides at temperatures as high as 230°C.
ZYFB will also tolerate exposure to inorganic acids at their boiling point for short lengths oftime.
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-ABJanuary 2004
Page 1 of 6

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

ZIRCONIA BOARDS, DISCS & CYLINDERSTYPE ZYFBShown below are SEM micrographs of ZYFB-3 (left) and ZYFB-6 board surfaces. Bothmaterials are made by vacuum forming zirconia fibers and sintering at a high temperature.
The fibers used in ZYFB-6 are shorter than those used in ZYFB-3 resulting in a higher density, lower porosity and higher strength.

Shown on the left is an SEM micrograph of theend of a fiber on the surface of a ZYFB-6 board.
This micrograph has been reduced to 75% of its
original size. Grains ranging in size from about
0.5 to about 3 microns make up the fiber which
is about 6.5 microns across. The serrated
structure which is characteristic of all Zircar zirconia fibers can be seen both in the lower magnification images shown above and in the closeup view on the left. The very porous nature ofType ZYFB can also be clearly seen in the micrographs.

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-AB
January 2004
Page 2 of 6

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

ZIRCONIA BOARDS, DISCS & CYLINDERSTYPE ZYFBCHEMICAL COMPOSITION
Zircar Zirconia’s type ZYFB is nominally 90 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 ZYFB minimizing trace oxides.
Trace Oxide

Typical Wt%

Trace Oxide

Typical Wt%

SiO2

0.12

Al2O30.01

TiO2

0.14

Na2O

0.01

CaO

0.09

SnO20.001

MgO

0.03

Cr2O30.0005

Fe2O30.04

Ag2O0.0005

MACHINING INFORMATION
Zirconia Type ZYFB has the consistency of soft chalk and can be cut or machined with avery wide range of tooling. For manual cutting, place the ZYFB part on a smooth cleansurface 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 ZYFB is very
abrasive and will cause rapid wear of high speed steel tooling which over time could resultin an out of tolerance condition. ZYFB boards can be held in place for CNC machining
with a vacuum hold down set up. Hot glue can also be used to fixture ZYFB but will generally form a 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 ZYFB.
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-AB
January 2004
Page 3 of 6

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

ZIRCONIA BOARDS, DISCS & CYLINDERSTYPE ZYFBPROPERTIES & CHARACTERISTICSZYFB-3ZYFB-60.48 (30)0.96 (60)9284

Melting Point, ºC (ºF)

2590 (4694)

2590 (4694)

Flexural Strength, (Parallel to thickness) MPa (psi)0.60 (85)2.10 (300)Compressive Strength, (Parallel to thickness)@ 10% Compression MPa (psi)0.29 (42)1.59 (230)

Nil

Nil

Dilatometric Softening Temperature, oC (ºF) at 10 psi

1180 (2156)

1240 (2264)

Thermal Expansion Coefficient (Perpendicular toThickness) Room Temperature to 1180oC (2156oF)

10.7 x 10-6/C (6 x10-6/F)

10.7 x 10-6/C (6 x10-6/F)

1 hour at 1650oC (3002oF)

1.2

1.024 hours. at 1650oC (3002oF)

2.8

1.7

W/mK (BTU/hr ft2 oF/inch) at 400oC (752oF)

0.08 (0.6)

0.16 (1.2)

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

0.11 (0.8)

0.19 (1.3)

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

0.14 (1.0)

0.22 (1.5)

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

0.19 (1.3)

0.25 (1.7)

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

0.24 (1.7)

0.27 (1.9)

Bulk Density, g/cc (pcf)Porosity, %Outgassing in Vacuum

Linear Shrinkage (Perpendicular to Thickness) , %Thermal Conductivity, (Parallel to thickness)

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-AB
January 2004
Page 4 of 6

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

ZIRCONIA BOARDS, DISCS & CYLINDERSTYPE ZYFBAPPLICATION INFORMATION•ZYFB is used as a high temperature, machinable hot face insulation in glass melting
furnaces.

•ZYFB is used as high temperature heat shielding. It can replace or reduce the numberof conventional refractory metal shields needed in many vacuum furnace applications
and is not restricted to non-oxidizing conditions.

•ZYFB is used as insulation in directional solidification furnaces for jet turbine blades.

•ZYFB Boards and Discs are excellent setter and fixturing materials. ZYFB's ready machinability, dimensional stability and low heat capacity favor its use as a setter in bothcontinuous and batch processes.

•Zircar Zirconia Cement Type ZR-CEM can be used to bond ZYFB boards and shapes
together to build up complex fixtures. Custom shapes for your particular application
may be easily machined out of these products.

•ZYFB can be treated with surface coatings to meet your needs. Please inquire.

ORDERING INFORMATION
Zircar Zirconia Insulation Type ZYFB is available in standard sized Boards and Discs which
are listed on page 6 with their ordering item number. Please contact our Sales Department
for Pricing and Availability.
•To order one of our standard sized Boards or Discs specify the Quantity you wish toorder, Product Type, Item #, and Size. For example: 12 each, ZYFB-6, Item # AB312,
12" DIA. x 1.50" TK•

Our forming process and machining capabilities allow a wide variety of custom sizedparts to be made (such as: boards, discs, cylinders and other shapes ). Pleasecontact us with your special requirements and we’ll be happy to provide you with a quotation.

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-AB
January 2004
Page 5 of 6

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

ZIRCONIA BOARDS, DISCS & CYLINDERSTYPE ZYFBStandard Sizes

ZYFB-3 Item No.

ZYFB-6 Item No.

Board, 8” x 8” x 0.50” TK

AA001

AB001

Board, 8” x 8” x 0.75” TK

AA002

AB002

Board, 8” x 8” x 1.00” TK

AA003

AB003

Board, 8” x 8” x 1.50” TK

AA004

AB004

Board, 10” x 10” x 0.50” TK

AA005

AB005

Board, 10” x 10” x 0.75” TK

AA006

AB006

Board, 10” x 10” x 1.00” TK

AA007

AB007

Board, 10” x 10” x 1.50” TK

AA008

AB008

Board, 12” x 12” x 0.50” TK

AA009

AB009

Board, 12” x 12” x 0.75” TK

AA010

AB010

Board, 12” x 12” x 1.00” TK

AA011

AB011

Board, 12” x 12” x 1.50” TK

AA012

AB012

Disc, 8” DIA x 0.50” TK

AA301

AB301

Disc, 8” DIA x 0.75” TK

AA302

AB302

Disc, 8” DIA x 1.00” TK

AA303

AB303

Disc, 8” DIA x 1.50” TK

AA304

AB304

Disc, 10” DIA x 0.50” TK

AA305

AB305

Disc, 10” DIA x 0.75” TK

AA306

AB306

Disc, 10” DIA x 1.00” TK

AA307

AB307

Disc, 10” DIA x 1.50” TK

AA308

AB308

Disc, 12” DIA x 0.50” TK

AA309

AB309

Disc, 12” DIA x 0.75” TK

AA310

AB310

Disc, 12” DIA x 1.00” TK

AA311

AB311

Disc, 12” DIA x 1.50” TK

AA312

AB312

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-AB
January 2004
Page 6 of 6