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Alumina Disc specifications
Al2O3 [%] |
≈99.8 |
MgO [%] |
≈0.1 |
Na2O [%] |
≈0.04 |
SiO2 [%] |
≈0.06 |
Fe2O3 [%] |
≤0.01 |
specific gravity (g/cm3) |
3.93 |
Vickers hardness（HV） |
2000 |
compressive strength（Mpa） |
3900 |
Bending strength（Mpa） |
390 |
Coefficient of thermal expansion（10-6K-1） |
5.5～8.4 |
dielectric strength（Ωcm） |
30 |
polishing (µm) |
Ra＜0.1 |