Ceramic Technical Specifications Content of AL2O3(%): ≥ 95% Density(g/cm3): 3.6 Rockwell hardness(HRA): 85 Rupturing toughness(MPa.m1/2): 4 Compression-resistant strength(MPa): ≥850 Bend-resistant(MPa): 300 Thermal conductivity(W/m.K): 24 Thermal expansion coefficient(10-6 m/m.K): 5.0-8.3 Rubber Technical Specification Shore A hardness: duro 55-65 Tensile strength: ≥12 Mpa Elongation at rupture: ≥250% Elongation permanent deformation: ≤24% Ceramic and rubber composite bond strength: ≥4.0Mpa