... -size distribution is even, colorless tasteless white powder High-purity alumina Use:The high-pressured sodium lamp inner tube,long Yu Huiye the ... , grinds the material, the catalyst carrier, the ruby, the sapphire. Quality:SpecificationCrystalPurity(%)≥Center position particle sized50(um)Relative surface product(m2 ... the customer request. 99.99% Min( r-AL2O3/a-AL2O3)High-Purity Alumina