Calcined alumina 99.5% Al2O3 99.5%min SiO2 0.036%max Fe2O3 0.02% ... produced according to clients' needs2) Al2O3: 99.00% min., 99.5% min., 99.7% min. 3) Alpha alumina: 95% min. 4) LOI ... , wear resistant ceramic, textile ceramic unit, corundum brick, chemical packing ball, refractory production Calcined Alumina