... .strong tenacity, 3.better bonding ability and hydrophilicity, Abrasive material Black Fused Aluminum Oxideblack aluminium oxide main chemical components of segment sand ... 73%MINF8-F80 Al2O3 73%MINF90-F400 Al2O3 67%MINBlack Fused Alumina main chemical components of the choicest goods:F16-F80 Al2O3 ... wheels, grinding wheels, sand cloth, paper and paste. Abrasive material Black Fused Aluminum Oxide