氧化铝陶瓷件Alumina Ceramics

These parts possess the characteristics of high mechanical strength, high rigidity, withstanding thermal shocks and corrosion, high dielectric strength, high isolativity, a lower loss in high frequency, high thermal conductivity and vacuum tightness. They are widely applied in electrical vacuum devices, I.C. chip setting, power transistors and solid integrated devices. In addtion to electronics, they are used in space technique, machinary, textile industry, chemistry, tectonics, etc.

 

	项目 Items 单位 Unit 条件 Condition 指标值 Value 体密度 Bulk Density g/cm3   >=3.65 抗折强度 Break-Resistivity Mpa   >280 线膨胀系数 Linear Expansion x10-6/K 20-500°C 6.3-7.3   20-800°C 6.3-7.3 相对介电常数 Dielectric Coefficient   1MHz,25°C 9-10   1MHz,500°C 9-10   10GHz,25°C 9-10 介质损耗角正切值 Dielectric Loss tgð x10-4 1MHz,25°C <4   1MHz,500°C 30-40   10GHz,25°C <10 体电阻率 Resistivity W·cm 25°C >1013   300°C >1010   500°C >108 介电强度 Dielectric Breakdown kV/mm   >20 耐腐蚀性能 Corrosion-Resistivity mg/cm2 1:9HCl <7.5   10%NaOH <0.2