Aluminum oxide



.
the natural or synthetic oxide of aluminum, Al 2 O 3 , occurring in nature in a pure crystal form as corundum.
Historical Examples

Earlier in this chapter I said that the slag, or aluminum oxide, from the thermit process was an almost useless product.
The Boy’s Book of New Inventions Harry E. Maule

Thus it is really to be regarded as a compound of the two oxides, aluminum oxide and beryllium oxide.
A Text-Book of Precious Stones for Jewelers and the Gem-Loving Public Frank Bertram Wade

It is virtually a compound of the two oxides, aluminum oxide and magnesium oxide.
A Text-Book of Precious Stones for Jewelers and the Gem-Loving Public Frank Bertram Wade

When, finally, a precipitation of aluminum oxide takes place the liquid is almost free from iron.
Scientific American Supplement No. 299 Various

noun
another name for aluminium oxide
aluminum oxide
See alumina.
alumina
(ə-l’mə-nə)
Any of several forms of aluminum oxide used in aluminum production and in abrasives, refractories, ceramics, and electrical insulation. Alumina occurs naturally as the mineral corundum and, with minor traces of chromium and cobalt, as the minerals ruby and sapphire, respectively. In its hydrated form it also occurs as the rock bauxite. Also called aluminum oxide. Chemical formula: Al2O3.

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