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    2. 氧化鋁陶瓷

       

       
      項目 Items 單位 Unit 條件 Condition 指標值 Value
      體密度
      Bulk Density
      g/cm3   >=3.65
      抗折強度
      Break-Resistivity
      Mpa   >280
      線膨脹系數
      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
      Dielectric Coefficient
        1MHz,25°C 9-10
        1MHz,500°C 9-10
        10GHz,25°C 9-10
      介質損耗角正切值
      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
      介電強度
      Dielectric Breakdown
      kV/mm   >20
      耐腐蝕性能
      Corrosion-Resistivity
      mg/cm2 1:9HCl <7.5
        10%NaOH <0.2
       

       

       

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