A Formalism to Describe Demixing of Mixed Oxides of Large and Small Grain Size in an Electric Field
作者： Irina V. Belova , Mandy J. Brown , Graeme E. Murch
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摘要: In this paper, we address the theory of electric field demixing cations in semi-conducting and initially homogeneous mixed ceramic oxides. We include off-diagonal phenomenological transport coefficients by assuming a random distribution making use an exact sum-rule expression. The steady state atomic composition profiles are shown to be quite different when assumptions made about vacancy equilibration. show that case large grained material (where vacancies interior do not equilibrate easily external oxygen partial pressure), maximum develops profiles. This behaviour is verified independent Monte Carlo simulations.
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