Superionic Conductors in the Bi2WO6-Bi2VO5.5 System

Bi2VXW1-x6-y ceramics are synthesized, and their structure and electrical properties are studied. The results indicate that the Bi2WO6-Bi2VO5.5 system contains Bi2WO6- and Bi2VO5.5-based solid solutions in the ranges 0 < x < or = 0.2 and 0.75 < or = x < 1, respectively. Tungsten stabiliz...

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Bibliographic Details
Published in:Inorganic materials 2005-07, Vol.41 (7), p.760-765
Main Authors: Voronkova, V. I., Yanovskii, V. K., Kharitonova, E. P., Rudnitskaya, O. G.
Format: Article
Language:English
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Summary:Bi2VXW1-x6-y ceramics are synthesized, and their structure and electrical properties are studied. The results indicate that the Bi2WO6-Bi2VO5.5 system contains Bi2WO6- and Bi2VO5.5-based solid solutions in the ranges 0 < x < or = 0.2 and 0.75 < or = x < 1, respectively. Tungsten stabilizes the high-temperature, tetragonal phase gamma-Bi2VO5.5, which persists down to room temperature at 0.75 < or = x < or = 0.84. In the range 350-550DGC, the electrical conductivity of the bismuth-vanadate-based solid solutions exceeds that of Bi2VO5.5 by about one order of magnitude. The conductivity of the Bi2WO6-based solid solutions is also higher than that of the host phase.
ISSN:0020-1685
1608-3172
DOI:10.1007/s10789-005-0205-y