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.
Read Also:
- Aluminum plant
a glossy green- or silver-leaved herb, Pilea cadierei, often grown as a houseplant.
- Aluminum silicate
any of a group of naturally occurring, water-insoluble substances, obtained from clay or synthesized, containing varying amounts of oxides of aluminum and silicon, Al 2 O 3 and Si 2 O 3 , and used in the manufacture of glass, ceramics, paints, printing inks, rubber, and plastics. Historical Examples China clay, or aluminum silicate, is […]
- Aluminum soap
any of the salts formed by higher carboxylic acids and aluminum, as aluminum oleate, aluminum palmitate, and aluminum stearate.
- Aluminum sulfate
a white, crystalline, water-soluble solid, Al 2 (SO 4) 3 , used chiefly as a water-purifying agent, as a mordant, and as a size in the manufacture of paper. Historical Examples Vitriol is copper or iron sulfate, saltpeter is potassium nitrate, and alum is an aluminum sulfate salt. Rembrandt’s Etching Technique: An Example Peter Morse
- Alumna
a woman who is a graduate or former student of a specific school, college, or university. Contemporary Examples “They claim me as an alumna, though I did not alum,” she said. Melissa Leo Breaks Oscar Silence Jacob Bernstein February 20, 2011 “Women are expected to do everything, do it well, and look hot while doing […]