... With high hardness, high density, low wear loss, good normalization, good corrosion-resistance, used as grinding media in ... ceramics, cements, paints, refractories, inorganic mineral powders, and other industries. Al2O3 60-70%, 90-95%, 99%, 99 ... to offer you best price.Also alumina ball can be made according to user's special requirements. Alumina Ceramic Ball Grinding Media