... of cordierite is 2MgO·2Al2O3·5SiO2,main material is steatite,clay,alumina,feldspar, etc. Manufactured by normal ceramic technical ... materials,burnable nozzle of electrical insulators, and etc.Cordierite porcelainEssential components2MgO 2Al2O3 5SiO2Densityg/cm32.5Water Absorption0Material characteristicsAgglomeration ... breakdown intensityKV/mm10Dielectric constant100MHz(E)6 cordierite ceramic parts