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氧化鋁陶瓷件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.

 

	項目 Items 單位 Unit 條件 Condition 指標(biāo)值 Value 體密度 Bulk Density g/cm3   >=3.65 抗折強(qiáng)度 Break-Resistivity Mpa   >280 線膨脹系數(shù) Linear Expansion x10-6/K 20-500°C 6.3-7.3   20-800°C 6.3-7.3 相對介電常數(shù) Dielectric Coefficient   1MHz,25°C 9-10   1MHz,500°C 9-10   10GHz,25°C 9-10 介質(zhì)損耗角正切值 Dielectric Loss tge x10-4 1MHz,25°C <4   1MHz,500°C 30-40   10GHz,25°C <10 體電阻率 Resistivity W·cm 25°C >1013   300°C >1010   500°C >108 介電強(qiáng)度 Dielectric Breakdown kV/mm   >20 耐腐蝕性能 Corrosion-Resistivity mg/cm2 1:9HCl <7.5   10%NaOH <0.2