Anionic and Cationic Diffusion in Ionic Conducting Oxides

Abstract:

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This paper concerns an analysis of the transport processes at high temperature in anionic conducting oxides subjected to a chemical potential gradient or an applied electrical field. The general equations are given. The principle of the cationic kinetic demixing under a “generalized“ thermodynamical potential gradient is reviewed. Experimental results obtained with yttria-doped zirconia are reported. An experimental procedure for the determination of the oxygen diffusion coefficient in ionic and semiconducting oxides is also described. The results obtained with yttriastabilized zirconia are compared to both self diffusion and conductivity data. This has allowed us to obtain information concerning the defect structure.

Info:

Periodical:

Defect and Diffusion Forum (Volumes 237-240)

Edited by:

M. Danielewski, R. Filipek, R. Kozubski, W. Kucza, P. Zieba, Z. Zurek

Pages:

843-848

DOI:

10.4028/www.scientific.net/DDF.237-240.843

Citation:

G. Petot-Ervas et al., "Anionic and Cationic Diffusion in Ionic Conducting Oxides", Defect and Diffusion Forum, Vols. 237-240, pp. 843-848, 2005

Online since:

April 2005

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$35.00

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