Korund

Corundum is made by alumina as raw material which is melted at high temperature. Its hardness is higher, but toughness is lower than that of brown corundum. The abrasive tools made from above that are suitable for the grinding of high carbon steel, high speed steel and quenching steel. They are also used as polishing materials and precision Sand mold Casting, spraying and coating materials, Chemical catalyst carrier, special ceramics and high refractory materials. 1.Chemical and Physical property : Item IndexAl2O3≥90%SiO2≤8%Fe2O2≤0.5%BD,g/cm3 ≥3.0AP,%≥19CSS,MPa≥800.20MPa,RUL,1600-1700PCL,%±0.2 1600*3hThermal conductivity W/m,k≤1.0Refractoriness1790