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Aluminum oxide Al2O3 has the chemical formula Al2O3. In materials science, mining and ceramics, aluminum oxide can also be called bauxite.

Aluminum Oxide Properties

Alumina (aluminium dioxide) is a hard compound that has the chemical formula Al2O3. Alumina, an amphoteric alloy, can be reacted with acid or alkali in order to form the aluminum salt.
Aluminum oxide is the typical amphoteric compound (corundum has an alpha shape and belongs to a hexagonal dense packing. It is an inert material, slightly soluble both in acid and in alkali and is corrosion resistant). Aluminum oxide dissolves in alkaline or inorganic solutions but is insoluble in water.

Alumina contains more than ten homogeneous, uniform crystals. There are three main types of crystals: gAl2O3,bAl2O3,and aAl2O3(corundum). Different structures are characterized by different properties. They almost entirely transform into a -Al2O3 when heated above 1300degC.

Applications of Aluminum Oxide

Aluminium oxide is the main raw material used for electrolytic aluminum production. But many other sectors, such as electronics and petroleum, as well as chemicals, ceramics, plastics (refractories), textiles, papermaking or pharmaceuticals, also need oxidation.

Currently, there are over 300 different types of nonmetallurgical oxide. They all have excellent chemical and physical properties. Their price is higher than the price for metallurgical oxide.

Due to its excellent properties such as high melting point and hardness, good mechanical and electrical properties, wear resistance, resistance to corrosion, and green heat resistance, ultra-fine high-purity aluminum oxide can be used for a variety of applications including: light-transmitting sintered bodies, single-crystal materials, advanced porcelains, artificial bones and teeth, semiconductors and integrated circuit substrates.

The high-purity series of aluminum oxides with a purity of 99.995% is used for artificial sapphire, PDP, ceramics and high-performance material. The raw material for sapphire crystal can be powder, granules or blocks, depending on the requirements.

99.99% high purity aluminum oxide is used primarily in high pressure sodium lamps, new luminescents materials, advanced coatings. Three primary colors are also used, as well as catalysts, and high performance materials.

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