White alumina is a high-purity alumina powder that is melted in an electric arc furnace, and the cooled crystal blocks are processed into products of various particle sizes. When melting alumina powder, chromium corundum can be obtained by adding appropriate amount of chromium trioxide.
Sintered corundum abrasive is alumina or alumina powder with a high alumina content, ground to less than 10 microns, adding appropriate amounts of additives (such as zirconia, magnesia) and a binder, extruded and cut into short fine Rod-shaped (approximately 1 mm in diameter and 5 mm in length), sintered in a kiln
