| Message: | 99.8% Al2O3 Ceramics specificationsAl2O3 [%]≈99.8MgO [%]≈0.1Na2O [%]≈0.04SiO2 [%]≈0.06Fe2O3 [%]≤0.01specific gravity (g/cm3)3.93Vickers hardness（HV）2000compressive strength（Mpa）3900Bending strength（Mpa）390Coefficient of thermal expansion（10-6K-1）5.5～8.4dielectric strength（Ωcm）30polishing (µm)Ra＜0.1
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