... Calcined alumina 99.5% Al2O3 99.5%min SiO2 0.036%max Fe2O3 0.02%max Na2O 0.35%max1) Particle size: from ... .00% min., 99.5% min., 99.7% min. 3) Alpha alumina: 95% min. 4) LOI: 0.1% (max.)5) Applications: advanced ... , textile ceramic unit, corundum brick, chemical packing ball, refractory production Calcined Alumina-50kg