Cordierite insulator or cordierite ceramic insulator belongs to cordierite ceramic. The main chemical ingredient of cordierite is 2MgO, 2Al2O3, 5SiO2. Main material is steatite, clay, alumina, feldspar etc. It is manufactured by normal ceramic technic. It can be used for loop framework, insulators of arc-resistance, element of composite materials, burnable nozzle of electrical insulators and so on.