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Home  >  Journal list  >  Journal of the Ceramic Society of Japan  >  Vol.118  No.1380 (August) (2010)  >  pp.741-744

Journal of the Ceramic Society of Japan
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Preparation of needle-like NaNbO3 by molten NaOH method

Seiji YAMAZOE1), Takuya KAWAWAKI1), Takahito IMAI1) and Takahiro WADA1)
1) Department of Materials Chemistry, Ryukoku University

  Needle-like NaNbO3 has been prepared in two steps by a molten NaOH method. First, Na7(H3O)Nb6O19·14H2O precursor was synthesized by the reaction of Nb2O5 with a molten NaOH at 450°C for 50 h in air. The Na7(H3O)Nb6O19·14H2O precursor was a needle-like single crystal 0.25–1.5 µm wide and >3 µm long. Then, the Na7(H3O)Nb6O19·14H2O precursor crystal transformed to NaNbO3 through an intermediate Na7(H3O)Nb6O19 by a heating above 500°C. The NaNbO3 was a needle-like polycrystal with a perovskite-type structure.

NaNbO3, Molten NaOH, Na7(H3O)Nb6O19·14H2O, Na7(H3O)Nb6O19·H2O, Perovskite

Received: April 22, 2010
Accepted: May 20, 2010 , Published online: August 01, 2010
Copyright (c) 2010 The Ceramic Society of Japan



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