... 45um(325mesh) 5.SGS, ISO 98.5% Gamma alumina powder Application:Metallurgy ceramic, refractories, glazing Physical Property ... : white powder, no block.Industrial grade alumina with little dust floated, good solubility, strong ... electrorefining aluminium, corundum, enamel, refractories and other alumina Specification is as following:Al2O3 : 98.5% ... /g 98.5% Industry gamma alumina powder