Definitionn. any of various forms of aluminum oxide occurring naturally as corundum
Last update: September 30, 2015
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The oxide is a black or brown powder according as it is prepared from the exalate or sulphate, and when pure it is non-fluorescent, but mixed with gadolinia or alumina it possesses this property. [Please select]
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Ores of iron contain the earths, silex, alumina, lime, and magnesia. [Please select]
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Can we then use "red liquor" (acetate of alumina), acetate of iron, copperas, etc. [Please select]
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THE MANUFACTURE OF ALUM AND THE SULPHATES AND OTHER SALTS OF ALUMINA AND IRON. [Please select]
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When aluminum is melted it forms alumina, an oxide of the metal. [Please select]
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Sulfate of alumina neutralizes one-third of its weight of caustic. [Please select]
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Since sulfate of alumina neutralizes one-third of its weight in caustic, and there are say 9 lbs. [Please select]
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United to oxygen it becomes alumina, the chief substance in clay. [Please select]
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Being made from a rigidly controlled artificial mixture of lime, silica and alumina the product of the best mills is a remarkably strong, uniform and stable material. [Please select]
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It is made by calcining and grinding a limestone rock containing naturally enough clayey matter (silica and alumina) to make a cement that will harden under water. [Please select]
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