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 Seal
materials > |
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Silicon carbides and Silicon Nitride
ceramics |
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SiC, Reaction Bonded |
SiC, Sintered |
Si3N4 |
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Purity |
% |
>90 |
>98 |
>98 |
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Density |
g/cm^3 |
>2.98 |
>3.10 |
>3.20 |
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Hardness Vickers 1kg |
kg/mm^2 |
2200 |
2400 |
2300 |
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Modulus of Elasticity |
GPa |
390 |
420 |
290 |
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Fracture toughness |
MPa*m^1/2 |
4.3 |
4.5 |
>5.6 |
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Flexural Strength (MOR) |
MPa |
420 |
450 |
650 |
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Compressive Strength |
MPa |
2500 |
3200 |
3000 |
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Thermal Expansion (CTE) |
10^-6/K |
4.3 |
4.4 |
3.3 |
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Thermal Conductivity |
W/(m·K) |
120 |
140 |
30 |
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