1.98.5% industry gamma alumina powder 2.Material origin: Australia 3.LOI: 0.76% ... 4.Particle Size: 45um(325mesh) 5.SGS, ISO 98.5% Gamma alumina powder Application:Metallurgy ceramic, refractories, glazing Physical Property: white ... .76%BET surface area: 72 m2/g 98.5% Industry gamma alumina powder