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 Seal
materials > |
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Alumina ceramics |
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Al2O3 - 99% |
Al2O3 -97% |
Al2O3 -Fe |
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Purity |
% |
>99.5 |
>97.0 |
>88 |
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Density |
g/cm^3 |
3.89 |
3.71 |
4.06 |
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Hardness Vickers 1kg |
kg/mm^2 |
2000 |
1900 |
1500 |
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Modulus of Elasticity |
GPa |
330 |
280 |
270 |
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Fracture toughness |
MPa*m^1/2 |
3.8 |
3.5 |
>5.6 |
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Flexural Strength (MOR) |
MPa |
330 |
320 |
300 |
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Compressive Strength |
MPa |
2600 |
2300 |
2300 |
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Thermal Expansion (CTE) |
10^-6/K |
8.2 |
8.0 |
9.1 |
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Thermal Conductivity |
W/(m·K) |
30.0 |
26.0 |
33.2 |
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