Journal
PHYSICS OF THE SOLID STATE
Volume 46, Issue 3, Pages 453-457Publisher
PLEIADES PUBLISHING INC
DOI: 10.1134/1.1687859
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The electron-density functional method (in the gradient approximation) and the pseudopotential method are used to study the mechanism of ionic conductivity in the cubic phase of zirconia stabilized with magnesium or yttrium. The oxygen-ion migration in the stabilized zirconia is shown to be a two-stage process, which consists in the formation of active oxygen vacancies and in oxygen-ion jumps from one active vacancy to another. The total activation energy of these processes is calculated to be 1.0-1.5 eV, which agrees with experimental data. (C) 2004 MAIK Nauka / Interperiodica.
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