Apr 30 2003
Background
Zirconia stabilised with Yttria has similar properties to those of Zirconia stabilised with Magnesia, although it is harder and tougher. It also has a finer grain structure.
The non-woven fabrics are felts fabricated by mechanically locking fibres, and firing at a high temperature.
The fabrics are flexible and chemically unreactive, being especially stable to hot caustic. The properties listed below are those of the sheet form.
Key Properties
The key properties of Zirconia stabilised with Yttria are tabulated below.
Applications
Applications of Zirconia stabilised with Yttria include thermal insulation, filtration and catalysis.
Table 1. Key properties
| Mechanical Properties |
| Compressive strength ( MPa ) |
2000 |
| Hardness - Vickers ( kgf.mm-2 ) |
1250 |
| Tensile modulus ( GPa ) |
200 |
| Tensile strength ( MPa ) |
300-600 |
| Physical Properties |
| Density ( g.cm-3 ) |
5.9 |
| Thermal Properties |
| Coefficient of thermal expansion ( x10-6 K-1 ) |
10 @ 20-1000 |
| Melting point ( °C ) |
2700 |
| Specific heat ( J.K-1.kg-1 ) |
400-500 @ 25 |
| Thermal conductivity ( W.m-1.K-1 ) |
2.5 @ 20 |
| Upper continuous use temperature (°C ) |
2200 |
| Properties Zirconia - stabilised with Yttria Non-Woven Fabric |
| Property |
|
Value |
| Compressive Strength |
MPa |
0.096 |
| Density |
g.cm-3 |
0.24 |
| Melting point |
°C |
2590 |
| Porosity |
% |
96 |
| Specific Heat @ 25 °C |
J.K-1.kg-1 |
545 |
| Thermal Conductivity @ 20 °C |
W.m-1.K-1 |
0.5 |
| Upper Continuous Use Temperature |
°C |
1930 |
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