... materials precision sand mold, casting,spraying coating materials. Brown Fused Alumina is made by alumina as raw material, which is meited at high tempreture ... 1.0refractoriness1790The abrasive tools that made from it are suitable for the grinding of high carbon steel, high speed steel and ... materials, chemical catolyst carrier, soecial ceranics and high refractory materials. Brown fused Alumina oxide