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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 an organic substance with the chemical Formula Al2O3, and it is a compound of high hardness. Alumina, an amphoteric alloy, can be reacted with alkali and form aluminate or it can be reacted with acid in order to form the aluminum salt of that acid.
Aluminum oxide is the typical amphoteric compound (corundum has an alpha shape and belongs to a hexagonal dense packing. It is a corrosion-resistant, inert material that is only slightly soluble with acid and alkali. Aluminum oxide dissolves in alkaline or inorganic solutions but is insoluble in water.
Alumina has over 10 homogeneous crystalline types. These include gAl2O3,bAl2O3,and aAl2O3(corundum). The properties of different structures are different, and at temperatures over 1300degC they almost entirely transform into a -Al2O3.
Applications of Aluminum Oxide
More than 90% of the aluminum oxide used for electrolytic aluminum is aluminum oxide. But many other sectors, such as electronics and petroleum, as well as chemicals, ceramics and plastics, textiles and papermaking, as well as pharmaceuticals, also need oxidation.
At the moment, there are over 300 different types of nonmetallurgical oxide. They all have excellent chemical and physical properties and can be used in a variety of ways. However, their price is significantly higher than for metallurgical oxide.
Due to its excellent properties such as high melting point and hardness, wear resistance, corrosion, and green heat resistance, ultra-fine high-purity aluminum oxide can be used for a variety of applications including: light-transmitting sintered bodies, phosphors carrier, advanced porcelains, artificial bones and teeth, semiconductors and integrated circuit substrates.
Aluminum oxides with a purity of 99.995% are mainly used in the production of artificial sapphire crystals for LEDs, ceramics advanced, PDPs 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 mainly in high pressure sodium lamps, new luminescents materials, special coatings, three primaries colors, catalysts and high performance materials.
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