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Ionic and electronic conductivity in CaTi1−xFexO3−δ (x=0.1–0.3)

Ionic and electronic conductivity in CaTi1−xFexO3−δ (x=0.1–0.3) Electrical conductivity measurements on CaTi1−xFexO3−δ (x=0.1, 0.2, 0.3) were performed on polycrystalline pressed and sintered tablets using the van der Pauw four point method in controlled atmospheres. The results were interpreted to reflect n-type, ionic and p-type conductivity at different oxygen partial pressures. An increasing iron content increases the number of oxygen vacancies and increases the ionic conductivity at high temperatures, but also increases the tendency of ordering, which suppresses the ionic conductivity at more moderate temperatures. These findings are in accordance with the phase diagram of the system CaTiO3-CaFeO2.5 based on X-ray and Mössbauer studies. http://www.deepdyve.com/assets/images/DeepDyve-Logo-lg.png Ionics Springer Journals

Ionic and electronic conductivity in CaTi1−xFexO3−δ (x=0.1–0.3)

Ionics , Volume 5 (6) – Mar 21, 2006

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References (14)

Publisher
Springer Journals
Copyright
Copyright © 1999 by IfI - Institute for Ionics
Subject
Chemistry; Biomedicine general; Analytical Chemistry; Physical Chemistry; Electrochemistry; Optical and Electronic Materials
ISSN
0947-7047
eISSN
1862-0760
DOI
10.1007/BF02376002
Publisher site
See Article on Publisher Site

Abstract

Electrical conductivity measurements on CaTi1−xFexO3−δ (x=0.1, 0.2, 0.3) were performed on polycrystalline pressed and sintered tablets using the van der Pauw four point method in controlled atmospheres. The results were interpreted to reflect n-type, ionic and p-type conductivity at different oxygen partial pressures. An increasing iron content increases the number of oxygen vacancies and increases the ionic conductivity at high temperatures, but also increases the tendency of ordering, which suppresses the ionic conductivity at more moderate temperatures. These findings are in accordance with the phase diagram of the system CaTiO3-CaFeO2.5 based on X-ray and Mössbauer studies.

Journal

IonicsSpringer Journals

Published: Mar 21, 2006

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