lapping abrasive powder Al2O3: 95.5% min SiO2: 0.8% max Fe2O3:0.08% max TiO2:2.3% maxCaO: 0.4% max Lapping abrasive powderProperties: The bauxite, coke (anthracite) as main raw material, by smelting at high temperature in the EAF, the main chemical composition: Al²0³, Ti 0² also small amounts of Si0² and Fe²0³. Characteristics: higher toughness than SiC, Micro hardness 1800-2200 kg/mm², bulk ...