... materials 2,precision sand mold, 3,casting,spraying 4,coating materials. White Fused Alumina White Fused Alumina is used as polishing materials and ... ceramics and high refractory materials. GB/T2479-1996CHEMICAL COMPOSITION OF WHITE ALUMINIUM OXIDERange of Grit SizesChemical Composition%(by weight) Al2O3 Na2O12 ... than 0.80W10-W5more than 97.00less than 0.80 White Fused Alumina for casting and spraying