Structural Stability and Conductivity of Phase‐Stabilized Cubic Bismuth Oxides
Authors:
- 1 November 1999
- journal article
- Published by Wiley in Journal of the American Ceramic Society
- Vol. 82 (11) , 3057-3064
Abstract
Bismuth oxide, when stabilized in the face‐centered cubic phase by lanthanide doping, has one of the highest oxygen‐ion conductivities among all solid oxide electrolytes. We previously reported a time‐dependent aging phenomenon in phase‐stabilized bismuth oxides that involves ordering of the anion sublattice, as distinct from a crystallographic phase change, and results in decreased conductivity. In this paper, we report on the structural stability of the disordered lattice in terms of aging, as a function of both dopant species and dopant concentration. The aging rate decreases with both increased dopant cation radius and increased dopant concentration.Keywords
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