Resistivity relaxation, a new approach to study ionic mobility in perovskite mixed conductors like CaTi0.7Fe0.3O3-ð

Mashkina E, Baier M, Magerl A, Göbbels M, Seifert F (2005)

Publication Language: English

Publication Type: Journal article

Publication year: 2005

Journal

Ionics Springer Verlag (Germany)

Publisher: Springer Verlag (Germany)

Book Volume: 11

Pages Range: 269-274

Abstract

Oxygen transport of mixed ionic-electronic conductors can be measured by a 'relaxation' technique that permits to investigate the material dynamic properties with oxygen partial pressure change. However, for materials exhibiting higher electronic conductivity than ionic, the time for conductivity change is controlled by bulk ionic transport and any surface reaction can be neglected. By fitting the experimental relaxation data of CaTi 0.7Fe0.3O3-δ composition, the oxidation and reduction kinetics was found to be independent on oxygen partial pressure (PO2) and the rate constants were derived therefrom. From a relaxation experiment at a single PO2 we therefore obtain both the electronic and ionic contributions to the total conductivity as well as the chemical diffusion coefficient.

Authors with CRIS profile

Andreas Magerl Lehrstuhl für Kristallographie und Strukturphysik (ICSP) Matthias Göbbels Lehrstuhl für Mineralogie

Involved external institutions

Universität Bayreuth DE Germany (DE)

How to cite

APA:

Mashkina, E., Baier, M., Magerl, A., Göbbels, M., & Seifert, F. (2005). Resistivity relaxation, a new approach to study ionic mobility in perovskite mixed conductors like CaTi0.7Fe0.3O3-ð. Ionics, 11, 269-274.

MLA:

Mashkina, Elena, et al. "Resistivity relaxation, a new approach to study ionic mobility in perovskite mixed conductors like CaTi0.7Fe0.3O3-ð." Ionics 11 (2005): 269-274.

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