alumina - meaning and definition. What is alumina
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What (who) is alumina - definition

CHEMICAL COMPOUND
Aluminum oxide; Al2O3; Aluminum Oxide; Aloxite; Axolite; Al2o3; Alumina ceramic; Alumina; Alundum; Aluminum(III) oxide; Aluminium(III) oxide; ATC code D10AX04; ATCvet code QD10AX04; Aluminium sesquioxide; Aluminum sesquioxide; Dialuminiumtrioxide; Aloxide; Aluminium Oxide; Alpha-Alumina; Aluminum trioxide

Alumina         
·noun One of the earths, consisting of two parts of aluminium and three of oxygen, Al2O3.
alumina         
n.
Oxide of aluminum, argillaceous earth, argil.
alumina         
[?'lu:m?n?]
¦ noun aluminium oxide, a white solid that is a major constituent of many clays and is found crystallized as corundum and sapphire. [Al2O3.]
Origin
C18: from L. alumen (see alum), on the pattern of words such as magnesia.

Wikipedia

Aluminium oxide

Aluminium oxide (or Aluminium(III) oxide) is a chemical compound of aluminium and oxygen with the chemical formula Al2O3. It is the most commonly occurring of several aluminium oxides, and specifically identified as aluminium oxide. It is commonly called alumina and may also be called aloxide, aloxite, or alundum in various forms and applications. It occurs naturally in its crystalline polymorphic phase α-Al2O3 as the mineral corundum, varieties of which form the precious gemstones ruby and sapphire. Al2O3 is significant in its use to produce aluminium metal, as an abrasive owing to its hardness, and as a refractory material owing to its high melting point.

Examples of use of alumina
1. Of the four holdings, World Wide Alumina includes RusAl‘s alumina assets, while Aluminium Group controls Deripaska‘s four Russian aluminum smelters.
2. United Company Rusal will also produce 11 million tonnes of alumina, making it the world‘s largest alumina maker.
3. Tom–Einar Rysst Jensen, head of global alumina and smelter growth at Hydro Aluminum, said Guinea was "a priority" for alumina projects.
4. A 35–member team from RusAl visited the Jamaican plants of West Indies Alumina Company, or Windalco, and Alumina Partners, or Alpart, this week, Jamaican media reported Wednesday.
5. Last year, RusAl bought from Kaiser Aluminum a 20 percent stake in the world‘s largest alumina mine, Queensland Alumina, for $460 million.