Crossword clues for alumina
The Collaborative International Dictionary
Alumina \A*lu"mi*na\, n. [L. alumen, aluminis. See Alum.] (Chem.) One of the earths, consisting of two parts of aluminium and three of oxygen, Al2O3.
Note: It is the oxide of the metal aluminium, the base of aluminous salts, a constituent of a large part of the earthy siliceous minerals, as the feldspars, micas, scapolites, etc., and the characterizing ingredient of common clay, in which it exists as an impure silicate with water, resulting from the decomposition of other aluminous minerals. In its natural state, it is the mineral corundum.
Wiktionary
n. aluminium oxide used especially in mining, material sciences and ceramics.
WordNet
n. any of various forms of aluminum oxide occurring naturally as corundum [syn: aluminum oxide, aluminium oxide]
Wikipedia
Usage examples of "alumina".
The iron is reduced to the ferrous state and phosphate of alumina precipitated in an acetic acid solution.
Suppose we know the capital and operating costs for bauxite mining, alumina production and aluminum smelting in the twentieth century.
Preliminary Treatment of the Fabric -- Waterproofing with Acetate of Alumina -- Impregnation of the Fabric -- Drying -- Waterproofing with Paraffin -- Waterproofing with Ammonium Cuprate -- Waterproofing with Metallic Oxides -- Coloured Waterproof Fabrics -- Waterproofing with Gelatine, Tannin, Caseinate of Lime and other Bodies -- Manufacture of Tarpaulin -- British Waterproofing Patents -- Index.
The th-iso-lysergic acid N,N-diethyl amide which remains absorbed on the alumina column as the second fluorescent zone is removed from the column by elution with chloroform.
Similarly, if to a silicate of lime we add oxide of iron, or soda, or even alumina, a fusible double silicate will be formed.
Generally a small, but decided, precipitate of alumina comes down, together with sulphides of any zinc or manganese which is present.
These shistose pyrites being composed principally of coal, flint, alumina, and sulphuret of iron--the latter in excess--it was necessary to separate the sulphuret of iron, and transform it into sulphate as rapidly as possible.
Lastly, this liquid being partly evaporated, crystals of sulphate of iron were deposited, and the not evaporated liquid, which contained the sulphate of alumina, was thrown away.
Thus Alizarine with alumina gives a scarlet, with chrome a dark red, and with iron a dull violet.
They stirred this mixture, let it settle, then decanted it, and obtained a clear liquid containing in solution sulphate of iron and sulphate of alumina, the other matters remaining solid, since they are insoluble.
Lastly, this liquid being partly evaporated, crystals of sulphate of iron were deposited, and the not evaporated liquid, which contained the sulphate of alumina, was thrown away.
Right in the midst of this half-sad, half-sentimental reverie, she heard a familiar voice behind her say earnestly: "And allophite is the new hydrous silicate of alumina and magnesia, much resembling pseudophite, which Websky found in Silesia.
Also, the moisture in the air reacts with the cryolite to form sodium fluoride, hydrofluoric acid, and alumina, thus further worsening the ratio.
Aurbach, Nonaqueous Electrochemistry, 503) A typical electrolyte is 2-8% alumina, 5-7% calcium fluoride, 5-7% excess aluminum fluoride, 0-7% lithium fluoride, and 80-85% cryolite.