1987•Inorg. Mater. (Engl. Transl.); (United States)Requires access
Reactions of lithium carbonate with niobium oxide in the presence of molten alkali chlorides and sulfates
A.K. Doroshenko, S.S. Lopatin, Т. Г. Лупейко, S. V. LOGVINOVA
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Abstract
We examine the reactions of Li/sub 2/CO/sub 3/ with Nb/sub 2/O/sub 5/ in molten lithium, sodium, and potassium chlorides and sulfates in order to identify fluxes that provide pure lithium metaniobate. The temperature for the start of reaction between lithium carbonate and niobium oxide is reduced in the presence of flux. The best results are obtained with LiCl, LiCl + NaCl and KCl. A lithium chloride melt enables one to make lithium metaniobate at temperatures lower by at least 100/sup 0/C than in solid-state reaction. The products consist of individual single-crystal particles of size up to 3 ..mu..m, which have high uniformity in grain-size composition and are free from impurities.