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Issue J. Phys. Colloques
Volume 47, Number C1, Février 1986
Thirteenth International Conference on Science of Ceramics
Page(s) C1-543 - C1-548
DOI http://dx.doi.org/10.1051/jphyscol:1986182

Thirteenth International Conference on Science of Ceramics

J. Phys. Colloques 47 (1986) C1-543-C1-548
DOI: 10.1051/jphyscol:1986182

A MODIFICATION OF DARKEN'S EQUATION FOR THE INTERDIFFUSION COEFFICIENT IN P-TYPE OXIDE SOLID SOLUTIONS

F. GESMUNDO1 et F. VIANI2

1  Istituto di Chimica Fisica Applicata dei Materiali, C.N.R., Lungobisagno Istria 34, I-16141 Genova, Italy
2  Istituto di Chimica, Facoltà di Ingegneria, Università di Genova, Fiera del Mare, Pad. D, I-16129 Genova, Italy


Résumé
Une forme modifiée de l'équation de Darken pour le coefficient d'interdiffusion est obtenue pour le cas de solutions solides d'oxydes de type (A,B)O en considérant l'effet de la différence entre les coefficients de diffusion des deux ions sur la concentration des défauts réticulaires pendant l'équilibration.


Abstract
A modified form of Darken's equation for the interdiffusion coefficient is obtained for the case of solid solution oxides of the (A,B)O type by considering the effect of the difference between the diffusion coefficients of the two ions on the concentration of the lattice defects during equilibration.



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