Influence of the method of alumina modification on formation of low-temperature solid solutions in magnesia—alumina systems

Formation of solid solutions in magnesia—alumina systems has been studied. It has been shown that depending on the method of introduction of magnesium and the temperature of heat treatment, formation of three types of solid solutions with the structure of γ-alumina is possible; the anionic, the anio...

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Bibliographic Details
Published in:Applied catalysis 1991-05, Vol.72 (1), p.63-69
Main Authors: Koryabkina, N.A., Ismagilov, Z.R., Shkrabina, R.A., Moroz, E.M., Ushakov, V.A.
Format: Article
Language:English
Subjects:
calcination
heat treatment
magnesia—alumina
solid solutions
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Summary:Formation of solid solutions in magnesia—alumina systems has been studied. It has been shown that depending on the method of introduction of magnesium and the temperature of heat treatment, formation of three types of solid solutions with the structure of γ-alumina is possible; the anionic, the anionic-cationic and the cationic type. The mechanical strength of the obtained samples of spherical alumina depends on the method of modification; the strongest samples are produced if magnesium is added to aluminium hydroxide with subsequent calcination at 820 K.
ISSN:0166-9834
DOI:10.1016/0166-9834(91)85028-T