Microlite aluminum oxide ceramic is one alumina ceramic material made of high purity α – Al₂O₃ and processed by several ceramic manufacturing procedures with crystal grain size less than 6μ m and the main crystal phase is corundum. This material has the character of high melting point, ultra high hardness, good mechanical strength, anti-corrosion, good insulation. Corundum is naturally of ultra high hardness, Mohs 9 in scale, almost equal to diamond in hardness.

Aluminum oxide has several crystal structure, mainly are the mesophase created by the dehydration of aluminum hydrate. The familiar crystal forms of alumina oxide are α – Al₂O₃, β – Al₂O₃ and γ – Al₂O₃.

Microlite aluminum oxide ceramic grinding ball as one most ideal grinding media is mainly used in the production of top grade sanitary ware and ceramic tiles. Using the microlite aluminum oxide ceramic grinding ball can improve productivity, reduce consumption of energy in clay grinding, reduce the requirement of natural grinding media like pebbles and preserve the ecological environment.