New Synthesis Process of Li, Na and K Niobates from Metal Alkoxides

ISSN 1121-7588

Yoko Suyama,Tetsuya Yamada ,Yosuke Hirano ,Kazuo Takamura, Kenjiro Takahashi
Division for Research of Science and Engineering, Graduate School, Shimane University, Nishikawatsu 1060, Matsue, 690-8504, Japan

Abstract

New synthesis process to prepare nano-particles of lithium niobate, sodium niobate and potassium niobate by thermal decomposition of the constituent double metal alkoxides was developed. Single crystals of such double-metal alkoxides as Na-Nb, Li-Nb and K-Nb ethoxides were newly synthesized from a mixed solution of the constituent metal ethoxides. The doublemetal alkoxides of the Li-Nb, Na-Nb and K-Nb systems decomposed at low temperatures below
673 K to form nano-particles of LiNbO₃, NaNbO₃ and LiNbO3. The lattice constants and crystallite size of the obtained LiNbO₃, NaNbO₃ and LiNbO₃ particles were elucidated. It was shown that this new synthesis process was useful for preparation of niobate nano-particles at low temperatures.

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