|  名称Description |  
            堇青石陶瓷 |  
          
 
           
           |  化学成份Chemical composition 2MgO 2Al 2 O 3 5SiO 2 (%) |  
            ≥ 90.2 |  
          
 
           
           |  物质特性 Material characteristics |  
            体积密度volume density (g/cm 3 ) |  
            ≥ 2.0 |  
          
 
           
           |  吸水率water absorption  (%) |  
            ≤ 1 |  
          
 
           
           |  烧结温度sintering temperature  (℃) |  
            1350 |  
          
 
           
           |  维氏硬度Vickers Hardness (HV) |  
            800-1600 |  
          
 
           
           |  物理性质physical property |  
            耐压强度Compressive Strength  (MPa) |  
            280~500 |  
          
 
           
           |  抗折强度(抗弯强度)Flexual Strength  (MPa) |  
            50~60 |  
          
 
           
           |  弹性模量Modulus of Elasticity  (GPa) |  
            50 |  
          
 
           
           |  热力特性 thermodynamic property |  
            最高使用温度Maximum Use Temperature  (℃) |  
            1350 |  
          
 
           
           |  热膨胀系数 Thermal Expansion Coefficient×10 -6 (20 ~ 100 ℃ ) |  
            1.1~1.8 |  
          
 
           
           |  耐热冲击力Heat-resistant wallop T(℃) |  
            260-350 |  
          
 
           
           |  导热系数 Thermal Conductivity kJ/(m 2 ·h· ℃ )(0 ~ 100 ℃ ) |  
            3.35~5.02 |  
          
 
           
           |  热震稳定性Thermal Shock Resistance  (△T℃) |  
            360 |  
          
 
           
           |  电气特性 electrical characteristic |  
            20℃体积电阻Volume Resistivity at 20℃(Ω×cm) |  
            ≥10 13 |  
          
 
           
           |  (400 ~ 600 ℃ ) 绝缘强度 Dielectric Strength  (MΩ·cm) |  
            2.3~5.6 |  
          
 
           
           |  绝缘破坏强度Dielectric Strength  (KV/mm) |  
            10 |  
          
 
           
           |  介质损耗角正切值dielectric loss factor tgδ  50Hz |  
            200×10 -4 |  
          
 
           
           |  介电常数Dielectric Constant100MHz(E) |  
            6 |