期刊
CERAMICS INTERNATIONAL
卷 31, 期 2, 页码 293-296出版社
ELSEVIER SCI LTD
DOI: 10.1016/j.ceramint.2004.05.019
关键词
microwave processing; calcination; powders; beta-Al2O3; Al2O3; synthesis
The synthesis of beta-alumina powder by microwave heating of the precipitate obtained through solution-precipitate techniques was described. A homogeneous mixture of Al-2(SO4)(3)(.)18H(2)O and Na(2)SO(4)(.)10H(2)O was precipitated by dropping the mixed solution of kaolin-derived aluminum sulfate and sodium hydroxide into ethanol with agitation by stirring. The precipitates were calcined at various temperatures for 1 h under conventional and microwave heating process for obtaining the beta-alumina powder with the structure consisting of beta- and beta-alumina phases with a larger amount of beta-alumina phase. The amount of beta-alumina phase in the microwave-calcined samples was larger than that in the conventionally calcined samples. (C) 2004 Elsevier Ltd and Techna Group S.r.l. All rights reserved.
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