High quality brown fused alumina, not only strictly control six chemical composition of AL2O3, TIO2, SIO2, etc. also pay more attention to CaO content, and before specially strengthening to get rid of iron and coat iridium, make it have more strength, purity, toughness, hydrophilicity. Ceramic abrasives products with it not only have more strength and wear-resisting, and don't cause ironspeck, microcrack, sand strip and some other problems. It is used for manufacturing all kinds of high grade bonded abrasives products.