High-temperature ion transport in La1-xSrxFeO 3-δ

Julia A. Bahteeva; Ilia A. Leonidov; Mikhail V. Patrakeev; Edward B. Mitberg; Victor L. Kozhevnikov; Kenneth R. Poeppelmeier

High-temperature ion transport in La_1-xSr_xFeO _3-δ

Julia A. Bahteeva, Ilia A. Leonidov, Mikhail V. Patrakeev, Edward B. Mitberg, Victor L. Kozhevnikov^*, Kenneth R. Poeppelmeier

^*Corresponding author for this work

Chemistry

Research output: Contribution to journal › Article › peer-review

43 Scopus citations

Abstract

The conductivity of the entire solid solution La_1-xSr _xFeO_3-δ, where x = 0.2, 0.4, 0.5, 0.7 and 0.9, in the oxygen partial pressure range 10^-19 to 0.5 atm and temperatures between 750 and 950°C is reported. The analysis of the isothermal pressure dependences of the conductivity reveal that the lanthanum-strontium ferrites can be characterized as mixed ion-electron conductors in the low-oxygen pressure/high-oxygen deficiency limit. The partial contribution to conductivity from oxygen ions increases with strontium content and attains a maximal value at x = 0.5. Further increase in doping results in the development of oxygen vacancy ordering phenomena and deterioration of the conducting properties.

Original language	English (US)
Pages (from-to)	578-584
Number of pages	7
Journal	Journal of Solid State Electrochemistry
Volume	8
Issue number	9
State	Published - Aug 1 2004

Keywords

Electron conductivity
Lanthanum-strontium ferrite
Oxygen conductivity
Oxygen-vacancy ordering

ASJC Scopus subject areas

Materials Science(all)
Condensed Matter Physics
Electrochemistry
Electrical and Electronic Engineering

Cite this

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title = "High-temperature ion transport in La1-xSrxFeO 3-δ",

abstract = "The conductivity of the entire solid solution La1-xSr xFeO3-δ, where x = 0.2, 0.4, 0.5, 0.7 and 0.9, in the oxygen partial pressure range 10-19 to 0.5 atm and temperatures between 750 and 950°C is reported. The analysis of the isothermal pressure dependences of the conductivity reveal that the lanthanum-strontium ferrites can be characterized as mixed ion-electron conductors in the low-oxygen pressure/high-oxygen deficiency limit. The partial contribution to conductivity from oxygen ions increases with strontium content and attains a maximal value at x = 0.5. Further increase in doping results in the development of oxygen vacancy ordering phenomena and deterioration of the conducting properties.",

keywords = "Electron conductivity, Lanthanum-strontium ferrite, Oxygen conductivity, Oxygen-vacancy ordering",

author = "Bahteeva, {Julia A.} and Leonidov, {Ilia A.} and Patrakeev, {Mikhail V.} and Mitberg, {Edward B.} and Kozhevnikov, {Victor L.} and Poeppelmeier, {Kenneth R.}",

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TY - JOUR

T1 - High-temperature ion transport in La1-xSrxFeO 3-δ

AU - Bahteeva, Julia A.

AU - Leonidov, Ilia A.

AU - Patrakeev, Mikhail V.

AU - Mitberg, Edward B.

AU - Kozhevnikov, Victor L.

AU - Poeppelmeier, Kenneth R.

PY - 2004/8/1

Y1 - 2004/8/1

N2 - The conductivity of the entire solid solution La1-xSr xFeO3-δ, where x = 0.2, 0.4, 0.5, 0.7 and 0.9, in the oxygen partial pressure range 10-19 to 0.5 atm and temperatures between 750 and 950°C is reported. The analysis of the isothermal pressure dependences of the conductivity reveal that the lanthanum-strontium ferrites can be characterized as mixed ion-electron conductors in the low-oxygen pressure/high-oxygen deficiency limit. The partial contribution to conductivity from oxygen ions increases with strontium content and attains a maximal value at x = 0.5. Further increase in doping results in the development of oxygen vacancy ordering phenomena and deterioration of the conducting properties.

AB - The conductivity of the entire solid solution La1-xSr xFeO3-δ, where x = 0.2, 0.4, 0.5, 0.7 and 0.9, in the oxygen partial pressure range 10-19 to 0.5 atm and temperatures between 750 and 950°C is reported. The analysis of the isothermal pressure dependences of the conductivity reveal that the lanthanum-strontium ferrites can be characterized as mixed ion-electron conductors in the low-oxygen pressure/high-oxygen deficiency limit. The partial contribution to conductivity from oxygen ions increases with strontium content and attains a maximal value at x = 0.5. Further increase in doping results in the development of oxygen vacancy ordering phenomena and deterioration of the conducting properties.

KW - Electron conductivity

KW - Lanthanum-strontium ferrite

KW - Oxygen conductivity

KW - Oxygen-vacancy ordering

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SN - 1432-8488

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JO - Journal of Solid State Electrochemistry

JF - Journal of Solid State Electrochemistry

IS - 9

ER -

High-temperature ion transport in La_1-xSr_xFeO _3-δ

Abstract

Keywords

ASJC Scopus subject areas

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