Cover Image

Synthesis and Properties of Vanadium Substituted Bismuth Tungstates with Fluorite-like Structure

Olga S. Kaimieva, Irina E. Sabirova, Elena S. Buyanova, Sophia A. Petrova

Abstract


The samples of vanadium substituted bismuth tungstates with a cubic structure were obtained by solid state method. The unit cell volume of the compounds slightly contracts with increasing tungsten content and in case of vanadium doping. Thermal expansion coefficient of bismuth tungstate is equal to 13×10-6 °C-1. The electrical conductivity was investigated using ac impedance spectroscopy. The results showed that the substitution of tungsten with vanadium ions increased electrical conductivity values by one order of magnitude.

Keywords


bismuth tungstate; fluorite-like structure; oxide-ion conductivity; solid electrolyte

Full Text:

PDF

References


Shuk P, Wiemhöfer H-D, Guth U, Göpel W, Greenblatt M. Oxide ion conducting solid electrolytes based on Bi2O3. Solid State Ionics. 1996;89:179–96. doi:10.1016/0167-2738(96)00348-7

Azad AM, Larose S, Akbar SA. Bismuth oxide-based solid electrolytes for fuel cells. Journal of Materials Science. 1994;29:4135–51. doi:10.1007/BF00414192

Ling CD, Johnson M. Modelling, refinement and analysis of the ‘Type III’ δ-Bi2O3-related superstructure in the Bi2O3-Nb2O5 system. Journal of Solid State Chemistry. 2004;177:1838–46. doi:10.1016/j.jssc.2004.01.003

Firman K, Tan KB, Khaw CC, Zainal Z, Tan YP, Chen SK. Doping mechanisms and electrical properties of bismuth tantalite fluorites. Journal of Materials Science. 2017;52:10106–18. doi:10.1007/s10853-017-1216-1

Mokhosoev MV, Alekseev FP, Lutsyk VI. Diagrammy sostoyaniya molibdatnykh I vol’framatnykh system [State diagrams of molybdate and tungstate systems]. Novosibirsk: Nauka; 1978. 320 p. Russian.

Wind J, Auckett JE, Withers RL, Piltz RO, Maljuk A, Ling CD. Type II Bi1-xWxO1.5+1.5x: a (3+3)-dimensional commensurate modulation that stabilizes the fast-ion conducting delta phase of bismuth oxide. Acta Crystallographica B. 2015;71:679–87. doi:10.1107/S2052520615018351

Wind J, Kayser P, Zhang Z, Evans IR, Lind CD. Stability and range of the type II Bi1-xWxO1.5+1.5x solid solution. Solid State Ionics. 2017;308:173–80. doi:10.1016/j.ssi.2017.07.015

Takahashi T, Iwahara H. High oxide ion conduction in sintered oxides of system bismuth oxide – tungsten oxide. Journal of Applied Electrochemistry. 1973;3:65–72. doi:10.1007/BF01119469

Shannon RD. Revised Effective Ionic Radii and Systematic Studies of Interatomie Distances in Halides and Chalcogenides. Acta Crystallographica A. 1976;32:751–67. doi:10.1107/S0567739476001551




DOI: http://dx.doi.org/10.15826/chimtech.2019.6.2.02

Copyright (c) 2019 Olga Kaimieva, Irina Sabirova, Elena Buyanova, Sophia Petrova

© Chimica Techno Acta, 2014-2019
ISSN 2411-1414 (Online), ISSN 2409-5613 (Print)

ROAD logo WorldCat logo DOAJ logo CAS logo BASE logo eLibrary logo