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Home  >  Journal list  >  Journal of the Ceramic Society of Japan  >  Vol.115  No.1348 (December) (2007)  >  pp.808-812

Journal of the Ceramic Society of Japan
<<Previous article Vol.115  No.1348 (December) (2007)   pp.808 - 812 Next article>>

Water Soluble Na[Nb(O2)3]•2H2O as a New Molecular Precursor for Synthesis of Sodium Niobate

Deepa DEY1), Valery PETRYKIN1), Satoshi SASAKI2) and Masato KAKIHANA1)
1) Institute of Multidisciplinary Research for Advanced Materials, Tohoku University
2) Materials and Structures Laboratory, Tokyo Institute of Technology


  A water-soluble tetraperoxo niobate [Nb(O2)4]3- was prepared by reaction of niobic acid with H2O2 at pH=11 in aqueous ammonia solution. The corresponding ammonium salt, (NH4)3[Nb(O2)4], was grown as a single crystal, and its crystal structure was solved. A white precipitate has been obtained from the solution containing (NH4)3[Nb(O2)4] and Na2CO3. Based on the elemental, TG, redox titration and Raman spectroscopic analyses, we have concluded that the obtained compound was Na[Nb(O2)3]•2H2O. This compound has been demonstrated to be a convenient precursor for synthesis of NaNbO3 by simple calcinations in air at the reduced temperature of 400-500°C.



Keyword:
Water-soluble molecular precursor, Sodium triperoxo niobium, Tetraperoxo niobium complex, Low-temperature synthesis, NaNbO3

Received: August 31, 2007
Accepted: October 18, 2007 , Published online: December 01, 2007
Copyright (c) 2007 The Ceramic Society of Japan

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