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Interdiffusion in ionic compounds

By Irina V. Belova and Graeme E. Murch

Abstract

In this chapter, we review the Nernst-Planck equation describing the cation interdiffusion coefficient, the two tracer cation diffusion coefficients and the thermodynamic factor in ionic compounds and how it is related to the analogous Darken-Manning relationship in binary alloy systems. We make use of the Onsager flux equations of non-equilibrium thermodynamics to rigorously address the problem. The recently found correction factor to the Nernst-Planck equation is analyzed visually by means of computer simulation

Topics: interdiffusion, ionic comopunds, Manning factor, vacancy wind factor
Publisher: Trans Tech Publications
Year: 2016
DOI identifier: 10.4028/www.scientific.net
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