... for loop framework, insulators of arc-resistance, element of composite materials, burnable nozzle. Cordierite CeramicsThe main chemical ingredient of cordierite is 2MgO•2Al2O3•5SiO2 ... , can be used for loop framework, insulators of arc-resistance, element of composite materials, burnable nozzle of electrical insulators, and etc. ItemTest ConditionUnit& SymbolCordierite ...