Structural Stability and Conductivity of Phase-Stabilized Cubic Bismuth Oxides

Autor:	Eric D. Wachsman, Naixiong Jiang
Rok vydání:	2004
Předmět:	Lanthanide Ionic radius Dopant Inorganic chemistry Doping Oxide chemistry.chemical_element Conductivity Bismuth chemistry.chemical_compound chemistry Electrical resistivity and conductivity Materials Chemistry Ceramics and Composites Physical chemistry
Zdroj:	Journal of the American Ceramic Society. 82:3057-3064
ISSN:	1551-2916 0002-7820
DOI:	10.1111/j.1151-2916.1999.tb02202.x
Popis:	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.
Databáze:	OpenAIRE
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