99% Al2O3 Ceramic Substrate

99%Al2O3 ceramic substratesare mostly used in thin-film circuit of electronics industry,large scale integrated circuit,power hytrid IC. 1. Small medium grain size, high density and hardness. 2. High smooth and flat surface. 3. Low dielectric loss and high stabilization. PROPERTY TESTINGCONDITIONS UNITS VALUE Color White Appearance Compate Density g/cm3 3.8 WaterAbsorption % 0 Mediumgrainsize μm 2 Hardness Loaded4.9N GPa ≥16.2 BendingStrength Mpa ≥343 Coefficientofliner Expansion 20 500°C 1×10-6mm/°C 6.5 7.5 20 800°C 6.5 8.2 ThermalConductivity 20°C W/(m·K) ≥25.1 SpecificHeat kJ/(kg·K) ≥0.8 DielectricStrength KV/mm ≥12 VolumeResistivity 20°C Ω·cm ≥1014 300°C ≥1011 500°C ≥109 DielectricConstant 1MHz 9.5 10.5 tangentofDielectricloss 1MHz ≤2×10-4 Surfaceroughness μm 0.2