Influence of acceptor doping on ionic conductivity in alkali earth titanate perovskites View Full Text


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Article Info

DATE

2002-05

AUTHORS

L. A. Dunyushkina, E. A. Mashkina, I. Yu. Nechaev, A. A. Babkina, N. O. Esina, B. V. Zhuravlev, A. K. Demin

ABSTRACT

The electrical conductivity of the SrTi1−xFexO3−δ, BaTi1−xFexO3−δ and SrTi1−xMnxO3−δ systems has been studied in a range of oxygen partial pressures between 10−16 and 0.21 atm at 900 and 1000 °C. The materials exhibit predominantly ionic conductivity in a wide range of intermediate oxygen partial pressures. It has been found that in Fe doped strontium and barium titanates, the dependencies of the ionic conductivity on the acceptor concentration show a local maximum near x=0.2. Taking into account that in the CaTi1−xFexO3−δ system (x=0−0.5), the concentration dependence of the ionic conductivity also has a maximum near x=0.2, it can be concluded that this is a common phenomenon for Fe doped alkali earth titanates. An assumption has been made that a scheme of defect formation devised earlier for Fe doped calcium titanate is applicable for other alkali earth titanates. More... »

PAGES

293-299

Identifiers

URI

http://scigraph.springernature.com/pub.10.1007/bf02376082

DOI

http://dx.doi.org/10.1007/bf02376082

DIMENSIONS

https://app.dimensions.ai/details/publication/pub.1007260207


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