16 Facts About Aluminium oxide


Aluminium oxide is a chemical compound of aluminium and oxygen with the chemical formula.

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Aluminium oxide is responsible for the resistance of metallic aluminium to weathering.

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The aluminium oxide generated by anodising is typically amorphous, but discharge assisted oxidation processes such as plasma electrolytic oxidation result in a significant proportion of crystalline aluminium oxide in the coating, enhancing its hardness.

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Aluminium oxide was taken off the United States Environmental Protection Agency's chemicals lists in 1988.

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Aluminium oxide is on the EPA's Toxics Release Inventory list if it is a fibrous form.

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Aluminium oxide is an amphoteric substance, meaning it can react with both acids and bases, such as hydrofluoric acid and sodium hydroxide, acting as an acid with a base and a base with an acid, neutralising the other and producing a salt.

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Aluminium oxide exists in other metastable phases, including the cubic ? and ? phases, the monoclinic ? phase, the hexagonal ? phase, the orthorhombic ? phase and the d phase that can be tetragonal or orthorhombic.

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Product aluminium oxide tends to be multi-phase, i e, consisting of several phases of aluminium oxide rather than solely corundum.

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Aluminium oxide is a common ingredient in sunscreen and is sometimes present in cosmetics such as blush, lipstick, and nail polish.

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Aluminium oxide serves as a catalyst support for many industrial catalysts, such as those used in hydrodesulfurization and some Ziegler–Natta polymerizations.

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Aluminium oxide flakes are used in paint for reflective decorative effects, such as in the automotive or cosmetic industries.

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Aluminium oxide can be grown as a coating on aluminium by anodizing or by plasma electrolytic oxidation .

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Aluminium oxide is an electrical insulator used as a substrate for integrated circuits but as a tunnel barrier for the fabrication of superconducting devices such as single-electron transistors and superconducting quantum interference devices .

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Aluminium oxide, being a dielectric with relatively large band gap, is used as an insulating barrier in capacitors.

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Aluminium oxide is used in preparation of coating suspensions in compact fluorescent lamps.

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Aluminium oxide is used in the coating of stanchions in the motorcross and mountainbike industry.

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