High Temperature Zirconium Oxide Felts 2000°C

Zirconium Oxide Felt, up to 2,000 °C

ZYF zirconium oxide fibre felts are the result of the Zircar Process by Zircar Zirconia which transforms an organic fibre into a ceramic fibre. The new fibre usually has a diameter of 6 to 10 μm and a serrated outer face. Zirconium oxide fibres are made of nearly 100 % zirconia phase stabilized with 10 % yttria. 

ZYF is a flexible, light weight, porous, needled felt. ZYF is an excellent all-purpose high temperature insulation that can be used in methods of crystal growing as iridium and platinum crucible insulation, and precious metal condensate reclamation material. These felts can withstand up to 2,000 °C without losing their properties. They are inorganic and do not require organic binders.

Because zirconium oxide fibers are yttria stabilized, they do not undergo the disruptive phase transition of pure zirconia. ZYF is non-reactive to alkali vapors, salts or strong hot solutions and is not wet by most molten metals. ZYF excels at extremely high temperatures and in severe environments such as corrosive, oxidizing and reducing atmospheres. 

Properties and Applications of Zirconium Oxide Fibre Felt

Version Properties Applications

ZYF-50, 

ZYF-100 

&

ZYF-150

Exceptional thermal insulation even > 1,930 °C

Flexible up to 1,350 °C

Low outgassing and odor even at HT

Light and porous structure

Low thermal conductivity

High thermal stability

High resistance to corrosive, oxidizing and reducing atmospheres

All-purpose

High temperature setter

High temperature shield and cover

High temperature insulation

Crystal growth

ZYF-100A

Similar to the ZYF-100 version but with a lower level of sodium.

All-purpose

Glass melting

High temperature setter

High temperature shield and cover

High temperature insulation

Crystal growth

Electrolytic cell gasket

ZYF-A2.13

Similar to the ZYF-150 version but harder.

Filled with alumina powder
and high fired to a rigid board.

Diffusion burner membrane for fuel fired heaters installed
in long-haul trucks and high-end passenger cars.

Setter plate for vacuum sintering flat sheets
of powdered metal materials.

ZYF-S.75G 

Similar to the ZYF-100 version but more flexible

Filled with 0.75 g of silica powder per 1 g of ZYF, remaining pliable.

Gasket material in fuel cells

ZYF-Z1.5G

Similar to the ZYF-100 version

Filled with 1.5 g of zirconia powder
per 1 g of ZYF and dyed green for identification

Gasket material in fuel cells


Technical Data of Zirconium Oxide Fibre Felt

Property

Unit

ZYF-50

ZYF-100

ZYF-100A

ZYF-150

ZYF-A2.13

ZYF-S.75G

ZYF-Z1.5G

Composition

ZrO2* + Y2O3

Wt. %

99 +

99+

99+

99+

97+

56+

99+

Al2O3

< 0.01

< 0.01

-

< 0.01

2 ± 1

< 0.01

< 0.01

SiO2

< 0.02

< 0.02

-

< 0.02

< 0.02

43

< 0.01

Na2O

-

-

< 500 ppm

-

-

-

-

Thickness

mm

1.27

2.54

2.54

3.81

4.06

± 0.89

2.54

± 0.76

2.54

± 0.76

Bulk Porosity

%

96

96

96

96

94

88

89

Bulk Density

g/cm3

0.24

0.24

0.24

0.24

0.32

0.48

0.64

Tensile Strength

g/cm

107

286

714

357

1,250

304

196

Area Density

g/m²

342

635

-

1,123

1,025

1,074

1,514

Melting Point

°C

2,593

2,593

2,593

2,593

-

-

-

Operating Temperature

°C

2,000

2,000

2,000

2,000

1,600

1,600

2,000

Compressive Strength

at 10 % compr.

Psi

3

3

-

5

13

13

13

Minimum Wrapping Diamater before Breaking

mm

6.35

19.05

19.05

76.20

914.40

50.80

304.8

Heat Capacity

93 °C

J.kg-1.K-1

544

544

544

544

-

-

-

2,371 °C

754

754

754

754

-

-

-

Vapour Pressure at 1,371 °C

Torr

8 x 10-12

-

-

-

% Shrinkage after 1 hr at 1,679 °C

%

5

4

6

4

1.5

5

14

**Maximum use temperature is dependent of variables such as chemical environment and stresses; both thermal and mechanical.*1-2 % weight hafnia (HfO2) occurs naturally with zirconia (ZrO2) and does not affect performance. 

Item N° and Packaging of Zirconium Oxide Fibre Felt

Zircar Item N°

Final Item N°

Name

Dimensions (mm)

CA001

225-0100

ZYF-50

457 x 610

CB001

225-0110

ZYF-100

457 x 610

CB047

225-0111

ZYF-100

457 x 686

CBA01

225-0120

ZYF-150

305 x 457

CBA03

225-0119

ZYF-150

457 x 610

CB048

225-0113

ZYF-100A

457 x 610

CB039

225-0121

ZYF-A2.13

216 x 406 x thick. 4

CB050

225-0114

ZYF-A2.13

406 x 406 x thick. 4

CB008

225-0122

ZYF-S.75G

457 x 610 x thick. 2.54

CB036

225-0115

ZYF-Z.1.5G

457 x 610 x thick. 2.54

Physical variables included in this documentation are provided by way of indication only and do not, under any circumstances, constitute a contractual undertaking. Please contact our technical service if you require any additional information.

Zirconia Felts (171.68k)

Technical data sheet: zirconia fibre felts.

Zirconium Oxide Fibre (326.87k)

Technical datasheet: Zirconium Oxide Fibre

High Temperature Felts (357.74k)

Technical Data Sheet: High Temperature Felts