Calcined alumina 99.5% Al2O3 99.5%min SiO2 0.036%max Fe2O3 0.02%max Na2O ... .4mm, can be produced according to clients' needs2) Al2O3: 99.00% min., 99.5% min., 99.7% min. 3) Alpha alumina: 95% min. 4 ... ) LOI: 0.1% (max.)5) Applications: advanced ceramic, plugs insulator, wear ...