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 |
Diffusion burner membrane for fuel fired heaters installed Setter plate for vacuum sintering flat sheets |
|
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 |
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
|
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|
Composition
|
ZrO2* + Y2O3
|
Wt. %
|
99 + |
99+ |
99+ |
99+ |
97+ |
56+ |
99+ |
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|
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 |
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|
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 |
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|
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 |
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|
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 |
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|
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 |
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**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.