cordierite ceramics

The main chemical ingredient of cordierite is 2MgO·2Al2O3·5SiO2,main material is steatite、clay、alumina、feldspar,etc. Manufactured by normal ceramic technic,can be used for loop framework,insulators of arc-resistance、element of composite materials、burnable nozzle of electrical insulators,and etc. Cordierite material parameters: Item Test Condition Unit&Symbol Cordierite ceramics The main chemical ingredient 2MgO 2Al2O3 5SiO2 Bulk Density gm/cc 2.5 Maximum Use Temperature 1000°C Water absorption % 0 Hardness HV 800 Bending Strength 20° C Kgf/cm2 900 Compressive Strength 20° C Kgf/cm2 3500 Fracture Toughness K(I c) Map.m3/2 - Coefficient of thermal expansion 1X 10-6/°C ≤2.0 Coefficient of thermal conductivity 25° C-30° C W/m °K 1.3- Thermal Shock Resistance Tc °C 250 Dielectricity constant 1MHz.25°C 6 Dielectric strength ac-kV/mm (ac V/mil) 10 Volume Resistivity 20°C ohm-cm > 1012 Inner packing: Soft packaging material Outer packing: Five-ply paper case