Effect of the conditions of obtaining aluminum hydroxide and oxide on the properties of powders and their sintering.

Autor: Degtyareva, É., Pozdnyakova, E., Boyarina, I., Girich, N., Dribinskii, A., Smirnov, E., Khanamirova, A., Nikogosyan, B., Simonyan, B., Apresyan, L.
Zdroj: Refractories; 1989, Vol. 30 Issue 1/2, p15-18, 4p
Abstrakt: A study of the effect of the conditions of obtaining aluminum hydroxide and alumina on the properties of the powders showed that fine milling and washing with water increase their dispersion and decreases the content of the alkali compounds. After fine milling and washing with water, the phase composition of the commercial-grade alumina undergoes a change: its a-AlO content decreases due to the transformation into the hydrated forms of AlO. Fine milling and washing of the alumina obtained from anode slimes lead to a significant reduction of the content of the alkali compounds in it and significantly improve the degree of sintering at 1650°C at a specific surface less than that of the milled commercial-grade alumina, i.e., the sintering temperature is 100°C lower than that required for the milled alumina of KirAF. [ABSTRACT FROM AUTHOR]
Databáze: Complementary Index
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