ABRASIVE MATERIAL

PURPOSE:An abrasive material that contains a specific amount of corundum which forms secondary coagulation particles together with tricalcium aluminate hexahydrade, thus showing high grinding ability and giving mirror-finish surfaces with low roughness and no scratch polish. CONSTITUTION:The objective abrasive material contains 10-70wt% of corundum and the corundum and tricalcium aluminate hexahydrate (abbreviated to C3AH6), both of which are composed of primary particles of 0.1-0.5mum, coagulate into secondary particles of less than 10mum particle sizes in such a state that the corundum particles are covered with the C3AH6 to give the abrasive material. EFFECT:The resultant abrasive material gives good-quality mirror surfaces with one-step grinding, resulting in rationalization of grinding operation. USE:Mirror finish for optical glass, lenses, cathode ray tubes and metal surfaces.