Calcined alumina 99.5% Al2O3 99.5%min SiO2 0.036%max ... .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 resistant ceramic, textile ceramic unit, corundum brick, chemical packing ball, refractory production Calcined Alumina