aluminum oxide

aluminum oxide
aluminum oxide n ALUMINA

* * *

a compound, occurring naturally as corundum and in hydrated form as bauxite, that is the raw material in aluminum production; impure crystalline forms include emery, ruby, and sapphire. Very fine grains are used in the production of abrasives, refractories, ceramics, catalysts, laboratory wares, and fluxes, to strengthen dental ceramics, and in chromatography.

Medical dictionary. 2011.

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