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

Journal article


Publication Details

Author(s): Mashkina E, Baier M, Magerl A, Göbbels M, Seifert F
Journal: Ionics
Publisher: Springer Verlag (Germany)
Publication year: 2005
Volume: 11
Pages range: 269-274
ISSN: 0947-7047
Language: English


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.



FAU Authors / FAU Editors

Göbbels, Matthias Prof. Dr.
Lehrstuhl für Mineralogie
Magerl, Andreas Prof. Dr.
Lehrstuhl für Kristallographie und Strukturphysik


External institutions with authors

Universität Bayreuth


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.

BibTeX: 

Last updated on 2018-09-08 at 12:08