Estimation of theoretical oxygen permeation rate through La(Sr)Ga(Fe)O 3 mixed conductor

Tatsumi Ishihara, Shinji Ishikawa, Tetsuro Furuno, Chunying Yu, Masaki Ando, Hiroyasu Nishiguchi, Yusaku Takita

Research output: Contribution to journalConference article

3 Citations (Scopus)

Abstract

Partial electronic and oxide ion conductivity in La0.7Sr 0.3Ga0.6Fe0.4O3 (LSGF) was investigated in this study by the ion blocking method. It was seen that LSGF stably exhibits the electronic hole conduction over wide oxygen partial pressure. The estimated oxide ion conductivity decreased with decreasing P O2 and this seem to be caused by decreasing amount of VO which is balanced with Fe valence number. The estimated transport number of oxide ion is reasonably agreed with those estimated by oxygen concentration cell. It was found that the theoretical oxygen permeation rate in LSGF is much larger than that of observed value. Therefore, it is expected that the oxygen permeation rate could be improved by increasing activity of surface catalyst.

Original languageEnglish
Pages (from-to)367-370
Number of pages4
JournalSolid State Ionics
Volume175
Issue number1-4
DOIs
Publication statusPublished - Nov 30 2004
EventFourteenth International Conference on Solid State Ionics - Monterey, CA., United States
Duration: Jun 22 2003Jun 27 2003

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Permeation
conductors
Ions
Oxides
Oxygen
oxygen
oxides
ions
conductivity
electronics
Partial pressure
partial pressure
valence
catalysts
conduction
Catalysts
cells

All Science Journal Classification (ASJC) codes

  • Chemistry(all)
  • Materials Science(all)
  • Condensed Matter Physics

Cite this

Ishihara, T., Ishikawa, S., Furuno, T., Yu, C., Ando, M., Nishiguchi, H., & Takita, Y. (2004). Estimation of theoretical oxygen permeation rate through La(Sr)Ga(Fe)O 3 mixed conductor. Solid State Ionics, 175(1-4), 367-370. https://doi.org/10.1016/j.ssi.2004.03.033

Estimation of theoretical oxygen permeation rate through La(Sr)Ga(Fe)O 3 mixed conductor. / Ishihara, Tatsumi; Ishikawa, Shinji; Furuno, Tetsuro; Yu, Chunying; Ando, Masaki; Nishiguchi, Hiroyasu; Takita, Yusaku.

In: Solid State Ionics, Vol. 175, No. 1-4, 30.11.2004, p. 367-370.

Research output: Contribution to journalConference article

Ishihara, T, Ishikawa, S, Furuno, T, Yu, C, Ando, M, Nishiguchi, H & Takita, Y 2004, 'Estimation of theoretical oxygen permeation rate through La(Sr)Ga(Fe)O 3 mixed conductor', Solid State Ionics, vol. 175, no. 1-4, pp. 367-370. https://doi.org/10.1016/j.ssi.2004.03.033
Ishihara, Tatsumi ; Ishikawa, Shinji ; Furuno, Tetsuro ; Yu, Chunying ; Ando, Masaki ; Nishiguchi, Hiroyasu ; Takita, Yusaku. / Estimation of theoretical oxygen permeation rate through La(Sr)Ga(Fe)O 3 mixed conductor. In: Solid State Ionics. 2004 ; Vol. 175, No. 1-4. pp. 367-370.
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AU - Ishihara, Tatsumi

AU - Ishikawa, Shinji

AU - Furuno, Tetsuro

AU - Yu, Chunying

AU - Ando, Masaki

AU - Nishiguchi, Hiroyasu

AU - Takita, Yusaku

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AB - Partial electronic and oxide ion conductivity in La0.7Sr 0.3Ga0.6Fe0.4O3 (LSGF) was investigated in this study by the ion blocking method. It was seen that LSGF stably exhibits the electronic hole conduction over wide oxygen partial pressure. The estimated oxide ion conductivity decreased with decreasing P O2 and this seem to be caused by decreasing amount of VO which is balanced with Fe valence number. The estimated transport number of oxide ion is reasonably agreed with those estimated by oxygen concentration cell. It was found that the theoretical oxygen permeation rate in LSGF is much larger than that of observed value. Therefore, it is expected that the oxygen permeation rate could be improved by increasing activity of surface catalyst.

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