White Aluminum Oxide Sand, Calcined Alumina Use for ceramics, refractory, polishing, depending on grade you choose. Aluminum oxide white powderWhite Aluminum Oxide Sand, Calcined Alumina powderAppearance: White powder Material: A-AL203Medium Particle Size (D50): 3 um Ultimate Crystal Size: 2-4umOrder Online, Use for ceramics, refractory, polishing, depending on grade you choose. Chemical ...