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Aluminium Oxide
Molecular formula: Al₂O₃
CAS NO. : 1344-28-1
EINECS No. : 215-691-6
Appearance: white solid
Min. order: 20 tons
Packing: 25 kg packed in woven bag
Direct manufacture with lowest price

Aluminium oxide is an amphoteric oxide with the chemical formula Al₂O₃. It is commonly referred to as alumina (α-alumina), aloxide, or corundum in its crystalline form, as well as many other names, reflecting its widespread occurrence in nature and industry. Its most significant use is in the production of aluminium metal, although it is also used as an abrasive owing to its hardness and as a refractory material owing to its high melting point. There is also a cubic γ-alumina with important technical applications.

The great majority of alumina is consumed for the production of aluminium, usually by the Hall process.

1)As a filler
2)As a catalyst and catalyst support
3)As an abrasive
4)As an effect pigment
5)As a fiber for composite materials
6)Alumina has been used in a few experimental and commercial fiber materials for high-performance applications (e.g., Fiber FP, Nextel 610, Nextel 720).
7)Aluminium oxide is an electrical insulator used as a substrate (Silicon on sapphire) for integrated circuits but also as a tunnel barrierfor the fabrication of superconducting devices such as single electron transistors and superconducting quantum interference (SQUID) devices.
8)Small pieces of alumina are often used as boiling chips in chemistry.
9)It is also used to make spark plug insulators.
10)Using a plasma spray process and mixed with titania, it is coated onto the braking surface of some aluminium bicycle rims to provide abrasion and wear resistance.