... treatment. 2.purity 99.7% 3.good quality&cheap 4.with ISOcertified aluminum oxide,calcined alumina Calcined alumina for ceramics, ... are able to produce a range of high alpha alumina grades with controlled soda chemistry, surface area ... media, glazes, technical and advanced ceramics.Alpha alumina is also used in surface treatment applications, careful ... a specific finish. aluminum oxide,calcined alumina