Brown fused aluminum oxide 1. Verified in high temperature 2. Al2O3>95%, SiO2<1% 3.supplied to Saint-gobain,Cumi,Comet... Brown fused alumina calcined in higher temperature is a kind of brown fused alumina treated with high temperature. Through calcination, the foreing substances are vaporized or separated out of the abrasive, so the sruface of abrasive is more pure and rough, the pre-water ...