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

ZIRCONIA BOARDS & DISCSTYPE ZYZZYZ Boards & Discs are Available in FourStandard Thicknesses.

FEATURES• Rigid and Machinable• Silica Bond for Thermal ShockResistance• Available in Two Densities; 30 & 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 Free

Type ZYZ Boards and Discs are rigid, refractory structures composed of yttria-stabilized
zirconia fibers that are bonded with silica. This unique composition provides Type ZYZ insulation with the low thermal conductivity of zirconia fibers combined with the strength andmachinability of a silica bonded material. ZYZ is evenly bonded, allowing it to be machined
to tight tolerances and intricate shapes. ZYZ has a lower coefficient of thermal expansion
than our Type ZYFB materials.
Type ZYZ is ideally suited for thermal insulation and protection applications under conditions of ultra-high temperatures and in a variety of severe environments. ZYZ is fired at ahigh temperature to impart good dimensional stability up to 1650°C. ZYZ has good hot
strength up to 1400°C and can be used as a self supporting setter for loads equal to twice
its own weight up to this temperature. ZYZ produces no smoke or odor and undergoes nophysically disruptive phase transitions when heated. ZYZ is available in two forms. ZYZ-3
has a bulk density of 30 pcf and possesses extremely low thermal conductivity. ZYZ-6 hasa bulk density of 60 pcf and is stronger than ZYZ-3.
Zirconia loses a small amount of oxygen at very high temperatures in vacuum and inert orreducing atmospheres. Although this reaction results in a color change from white to gray,other properties remain essentially unchanged and insulation effectiveness is not impaired.

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-EF
January 2004
Page 1 of 6Zircar Zirconia, Inc.
“Manufacturer of the original ZIRCAR products” ©

ZIRCONIA BOARDS & DISCSTYPE ZYZ
Shown below are SEM micrographs of ZYZ-3 (left) and ZYZ-6 board surfaces. Both materials are made by vacuum forming zirconia fibers and sintering at a high temperature. The
fibers used in ZYZ-6 are generally shorter than those used in ZYZ-3 and are packed tighter
resulting in a higher density, lower porosity and higher strength.

Shown on the left is anenergy
dispersive
spectroscopy (EDS)
graph of the intersection of two fibers on thesurface of ZYZ-3. Thesilica peak is from thesilica binder.

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-EF
January 2004
Page 2 of 6

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

ZIRCONIA BOARDS & DISCSTYPE ZYZCHEMICAL COMPOSITION
Zircar Zirconia’s Type ZYZ is nominally 85 wt% ZrO2 + HfO2 and 10 wt% Y2O3. 1 to 2 wt%
hafnia (HfO2) occurs naturally with zirconia (ZrO2) and does not affect performance. Onlythe highest purity starting materials are used to make Type ZYZ minimizing trace oxides.
Trace Oxide

Typical Wt%

Trace Oxide

Typical Wt%

SiO2 (binder)

5

Al2O30.01

TiO2

0.14

Na2O

0.01

CaO

0.09

SnO20.001

MgO

0.03

Cr2O30.0005

Fe2O30.04

Ag2O

0.0005

MACHINING INFORMATION
Zirconia Type ZYZ has the consistency of soft chalk and can be cut or machined with avery wide range of tooling. For manual cutting place the ZYZ 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 ZYZ is very abrasive and will cause rapid wear of high speed steel tooling which over time could result in an
out of tolerance condition. ZYZ boards can be held in place for CNC machining with avacuum hold down set up. Hot glue can also be used to fixture ZYZ 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 ZYZ.
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-EF
January 2004
Page 3 of 6

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

ZIRCONIA BOARDS & DISCSTYPE ZYZPROPERTIES & CHARACTERISTICS
ZYZ-3

ZYZ-6

0.48 (30)0.96 (60)9185

Melting Point, ºC (ºF)

2200 (3992)

2200 (3992)

Continuous Maximum Use Temperature, ºC (ºF)

1650(3002)

1650(3002)

Intermittent Maximum Use Temperature, ºC (ºF)

1700(3092)

1700(3092)

Flexural Strength, (Parallel to Thickness) MPa (psi)0.28 (40)

1.74 (252)Compressive Strength, (Parallel to Thickness)
MPa (psi) @ 10% Compression

0.39 (56)0.92 (134)

Nil

Nil

Dilatometric Softening Temperature, oC (oF) at 10psi

1250 (2282)

1275 (2372)

Thermal Expansion Coefficient RT - 1250oC (2282oF)(Perpendicular to Thickness)

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

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

1 hour at 1650oC (3002oF)

1.7

1.6

24 hours at 1650oC (3002oF)

2.3

2.6

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)

0.20 (1.4)

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

0.14 (1.0)

0.23 (1.6)

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)

0.23 (1.6)

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-EF
January 2004
Page 4 of 6

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

ZIRCONIA BOARDS & DISCSTYPE ZYZAPPLICATION INFORMATION•ZYZ Boards are used as self-supporting, primary thermal insulation in laboratory andindustrial furnaces.

•ZYZ Boards and Discs may be used as high temperature heat shielding. It can replaceor reduce the number of conventional refractory metal shields needed in many vacuum
furnace applications and is not restricted to non-oxidizing conditions.

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

•Complex assemblies and fixtures can be fabricated by bonding ZYZ boards and shapes
together using Zircar Zirconia Cement Type ZR-CEM. The cemented ZYZ assembly
can be easily machined into the custom shape require for your application. ZYZ surfaces can also be hardened with Zirconia Rigidizer Type ZR-RIG.

•ZYZ is not suitable for use in reducing atmospheres because the silica binder is removed in service. For 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 ZYZ is available in Standard sized Boards and Discs. which
are listed on page 6 along with their ordering item number. Please contact our Sales Department for Pricing ad Availability.
•To order one of our standard sized Boards or Discs specify the Quantity you wish to order, Product Type, Item #, and Size.
For example: 12 each, ZYZ-3, Item # AE011, 12" x 12” x 1.00" TK•

Our forming process and machining capabilities allow a wide variety of custom sizedparts to be made (such as: boards, discs and other shapes ). Please contact us withyour 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-EF
January 2004
Page 5 of 6

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

ZIRCONIA BOARDS & DISCSTYPE ZYZStandard Sizes

ZYZ-3 Item No.

ZYZ-6 Item No.

Board, 8” x 8” x 0.50” TKAE001

AF001Board, 8” x 8” x 0.75” TK

AE002

AF002

Board, 8” x 8” x 1.00” TK

AE003

AF003

Board, 8” x 8” x 1.50” TK

AE004

AF004

Board, 10” x 10” x 0.50” TK

AE005

AF005

Board, 10” x 10” x 0.75” TK

AE006

AF006

Board, 10” x 10” x 1.00” TK

AE007

AF007

Board, 10” x 10” x 1.50” TK

AE008

AF008

Board, 12” x 12” x 0.50” TK

AE009

AF009

Board, 12” x 12” x 0.75” TK

AE010

AF010

Board, 12” x 12” x 1.00” TK

AE011

AF011

Board, 12” x 12” x 1.50” TKAE012

AF012

Disc, 8” DIA x 0.50” TK

AE301

AF301

Disc, 8” DIA x 0.75” TK

AE302

AF302

Disc, 8” DIA x 1.00” TK

AE303

AF303

Disc, 8” DIA x 1.50” TK

AE304

AF304

Disc, 10” DIA x 0.50” TK

AE305

AF305

Disc, 10” DIA x 0.75” TK

AE306

AF306

Disc, 10” DIA x 1.00” TK

AE307

AF307

Disc, 10” DIA x 1.50” TK

AE308

AF308

Disc, 12” DIA x 0.50” TK

AE309

AF309

Disc, 12” DIA x 0.75” TK

AE310

AF310

Disc, 12” DIA x 1.00” TK

AE311

AF311

Disc, 12” DIA x 1.50” TK

AE312

AF312Zircar 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-EF
January 2004
Page 6 of 6