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The Properties And Applications of Aluminum Oxide Powder

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Aluminum oxide Al2O3 has the chemical formula Al2O3. Aluminum oxide, also known as bauxite, is used in materials science and ceramics.

Aluminum Oxide Properties

Alumina (aluminium dioxide) is a hard compound that has the chemical formula Al2O3. Alumina, an amphoteric alloy, can be reacted with alkali and form aluminate or it can be reacted with acid to produce aluminum salt of that acid.
Aluminum oxide is the typical amphoteric compound (corundum has an alpha shape and is one of the densest hexagonal packings, it is inert and slightly soluble in alkali and acid, and is corrosion resistant). Aluminum oxide dissolves in inorganic alkali and acids, but is insoluble in water or non-polar organic solvents.

Alumina contains more than ten homogeneous 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

Aluminum oxide is the main raw material used for electrolytic aluminum production. But many other sectors, such as electronic products, pharmaceuticals and chemicals, as well ceramics, plastics textiles and papermaking also need oxidation.

There are over 300 different types of nonmetallurgical oxides, all of which have excellent chemical and physical properties. They also have a variety of uses. However, the prices of these oxides are much higher than those of metallurgical oxides.

Due to its excellent properties such as high melting point and hardness, corrosion resistance and wear resistance, ultra-fine high-purity aluminum oxide can be used in a variety of applications including: light-transmitting sintered bodies, phosphors carrier, 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 mainly used in the production and processing for LED artificial crystals, PDP PDPs, high-performance ceramics and other materials. The raw material for sapphire crystal can be powder, granules or blocks, depending on the requirements.

The 99.99% high purity aluminum oxide series can be used in high pressure sodium lamps, new luminescent substances, special ceramics or coatings, as well as three primary colors and high performance materials.

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