1 aluminum oxide powder for refractories 2.Al2O3 content ... : 98.6%min 3.attrition index:5-10 4.we are a manufacture basic raw material for ... as high- alumina refractories, equipments and tools for polishing and grinding, spark plug, electroceramics, ... refractory material, alumina, aluminum hydroxide, high temperature aluminum oxide and white corundum, etc..