材料AL2O3(99瓷)Ceramics(99%)AL2O3+MgO含量≥%ContentofAL2O3andMgO≥%99.5抗折強(qiáng)度Kg/cm2BendingStrengthKg/cm23000體積密度g/cm3Densityg/cm33.9硬度（HRA）Hardness(HRA)90熱膨脹系數(shù)(10-6/℃)CoefficientofHeatExpansion5.3導(dǎo)熱系數(shù)(W/M.K)ThermalConductivity(W/M.K)26.7