Used for lithium battery separator coatings and electrode materials, precision polishing materials, alumina ceramic substrates, high-purity alumina grinding balls, toughening agents for zirconia grinding balls, electronic packaging materials, raw materials for producing aluminum nitride via carbon reduction method, fillers for thermally conductive engineering plastics, advanced refractory materials, automotive spark plugs, inorganic membranes, bioceramics, and other functional and structural ceramic materials.