High-purity, superfine, the grain-size distribution is even, colorless tasteless white powder High-purity alumina Use:The high-pressured sodium lamp inner tube,long Yu Huiye the burnishing powder, grinds the material, the catalyst carrier, the ruby, the sapphire. Quality:SpecificationCrystalPurity(%)≥Center position particle sized50(um)Relative surface product(m2/g)The pine installs the density( ...