... treatment. 2.purity 99.8% 3.with ISO 9011-2000 certificated al2o3 99.8%,calcined grade Calcined alumina for ... we are able to produce a range of high alpha alumina grades with controlled soda chemistry, surface area ... of grinding media, glazes, technical and advanced ceramics.Alpha alumina is also used in surface treatment applications, careful ... a specific finish aluminuim oxide powder,99.8%,1-9 um