What can aluminum oxide be used for?

Nature of Alumina oxide

Alumina is a stable oxide of aluminum with the chemical formula Al2O3. They are also known as bauxite in mining, pottery, and materials science. Properties: White solid insoluble in water, odorless, tasteless, extremely hard, easy to absorb but not deliquescence (burned does not absorb moisture). Alumina is a typical amphoteric oxide (corundum is α-shaped and belongs to the hexagonal closest packing, it is an inert compound, slightly soluble in acid and alkali corrosion resistance [1]), soluble in inorganic acid and alkaline solution, almost insoluble in the water And non-polar organic solvents; relative density (d204) 4.0; melting point 2050 ° C.

Physical properties of Alumina oxide

Molecular weight: 101.96

Melting point: 2054 °C

Boiling point: 2980°C

True density: 3.97 g/cm3

Bulk density: 0.85 g/mL (325 mesh~0) 0.9 g/mL (120 mesh~325 mesh)

Crystal structure: Trigonal (hex)

Solubility: insoluble in water at room temperature

Conductivity: non-conductive at room temperature


Application of Alumina oxide

1 Manufacture of strengthened glass

Information: Corundum powder has high hardness and can be used as abrasive, polishing powder, high-temperature sintered alumina, called artificial corundum or artificial gemstone, and can be used to make mechanical bearings or diamonds in watches. Alumina is also a high-temperature material to make refractory bricks, crucibles, porcelain, artificial gemstones, etc. Alumina is also a raw material for aluminum smelting. Calcining aluminum hydroxide can produce γ-Al2O3. γ-Al2O3 has strong adsorption capacity and catalytic activity and can be used as an adsorbent and catalyst. The main component of corundum is α-Al2O3.

2 Alumina is why metal aluminum is not easily corroded in the air. Pure metallic aluminum quickly reacts with oxygen in the mood to form a thin aluminum oxide film covering the aluminum surface exposed to the air. This layer of the aluminum oxide film can prevent the aluminum from being further oxidized. Both the thickness and the properties of the oxide film can be enhanced through a treatment process called anodizing (anodic corrosion protection).

3 Aluminum oxide is suitable for various dry and wet processing processes, can polish the rough surface of any workpiece to fineness, and is one of the most economical abrasives. This kind of sharp and water chestnut artificial synthetic abrasive has a hardness second only to diamond and is especially suitable for use when there are strict requirements on iron pollution. For the roughest cuts, it can also be made into a pebble shape for processing workpieces with precise dimensions to achieve extremely low roughness. Due to its dense, sharp, water chestnut structure, it is one of the fastest-cutting abrasives.

4 Alumina is divided into calcined alumina and general industrial alumina. Calcined alumina is an important raw material for producing antique bricks, while industrial alumina can be used to create the microcrystalline stone. In traditional glazes, alumina is often used for whitening. Due to the popularity of antique bricks and microcrystalline rocks in the market, alumina consumption is also increasing yearly.


Price of Alumina oxide

Particle size and purity will affect the product's price, and the purchase volume can also affect the cost of particle size. A large amount of large amount will be lower. The price of particle size can be found on our company's official website.


Alumina oxide supplier

Luoyang Tongrun Nano Technology Co. Ltd. (TRUNNANO) Luoyang City, Henan Province, China, is a reliable and high-quality global chemical material supplier and manufacturer. It has more than 12 years of experience providing ultra-high quality chemicals and nanotechnology materials, including Zinc sulfide, nitride powder, Zinc sulfide powder, sulfide powder, and 3D printing powder. If you are looking for high-quality and cost-effective Alumina oxide, you are welcome to contact us or inquire at any time.

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