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Mixed Conductivity and Oxygen Permeability of (BaxSr1-x)0.98Fe1-yMyO3-&[delta] ( x = 0.1-0.3, y = 0.1-0.4 and M = Ga, Al )

Published online by Cambridge University Press:  26 February 2011

Kang Chun Yong ,
Hajime Kusaba ,
Hisahiro Einaga  and
Yasutake Teraoka
Kang Chun Yong
Affiliation:
mirraju@mm.kyushu-u.ac.jp, Kyushu-univ, Department of Molecular and Material science, Kasuga kouenn6-1, Kasuga, 816-8580, Japan, +81-92-583-7527, +81-92-573-0342
Hajime Kusaba
Affiliation:
Kusaba@mm.kyushu-u.ac.jp, Kyushu Univ., Department of Molecular and Material Science, Faculty of Engineering Sciences, Kasugakouenn 6-1, Kasuga, 816-8580, Japan
Hisahiro Einaga
Affiliation:
einaga@mm.kyushu-u.ac.jp, Kyushu Univ., Department of Molecular and Material Science, Faculty of Engineering Sciences, Kasugakouenn 6-1, Kasuga, 816-8580, Japan
Yasutake Teraoka
Affiliation:
teraoka@mm.kyushu.ac.jp, Kyushu Univ., Department of Molecular and Material Science, Faculty of Engineering Sciences, Kasugakouenn 6-1, Kasuga, 816-8580, Japan
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Abstract

Substitution effects of Ga and Al for Fe in (BaxSr1-x)0.98FeO3-δ were studied with respect to crystal structure, conductivity and oxygen permeability. The solubility limits of Ga and Al in (BaxSr1-x)0.98Fe1-yMyO3-δ (M=Ga, Al) were between 20 and 30 mol%. The substitution of Ga and Al caused decreases in electronic and oxide ionic conductivities (mixed conductivities) but the enhancement of the reduction tolerance. Sintered membranes of the Ga- and Al-substituted oxides showed oxygen permeability under the He/air oxygen partial pressure gradient and were stable under the condition of methane partial oxidation at 900 °C.

Keywords

ionic conductorelectrical propertiesGa
Type
Research Article
Information
MRS Online Proceedings Library (OPL) , Volume 972: Symposium AA – Solid-State Ionics—2006 , 2006 , 0972-AA02-05
Copyright
Copyright © Materials Research Society 2007

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References

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