Chemical stability of La 1-xSr xCrO 3 in oxidizing atmospheres

Shogo Miyoshi, Shigenori Onuma, Atsushi Kaimai, Hiroshige Matsumoto, Keiji Yashiro, Tatsuya Kawada, Junichiro Mizusaki, Harumi Yokokawa

Research output: Contribution to journalArticle

24 Citations (Scopus)

Abstract

The single-phase region of La 1-xSr xCrO 3 (x=0.1, 0.2, 0.3) was precisely determined as a function of temperature, P O2 and Sr content. The powders with the nominal composition of La 1-xSr xCrO 3 were equilibrated under various conditions, and then identified by XRD analyses. To confirm the equilibration, two independent experiments were performed for each composition observing (i) the precipitation of the second phase from a single-phase solid solution, and (ii) the formation of the single phase from the constituent oxides. Two kinds of second phases, SrCrO 4 and an unknown phase, were observed depending on the conditions. The second phases tended to appear at low temperature, in high P O2 and with a large Sr content. The single-phase regions obtained via the two equilibration routes were in good agreement with each other. The thermodynamic calculations on the supposition of ideality of the solid solution essentially reproduced the experimental results. When this material is used as the interconnects of solid oxide fuel cells, much attention should be paid to its relatively narrow solubility range of Sr; for example, the solubility limit is approximately 0.1 under a typical cathode-side condition (1273K, air).

Original languageEnglish
Pages (from-to)4112-4118
Number of pages7
JournalJournal of Solid State Chemistry
Volume177
Issue number11
DOIs
Publication statusPublished - Nov 1 2004
Externally publishedYes

Fingerprint

Chemical stability
Solid solutions
Solubility
atmospheres
solid solutions
solubility
Solid oxide fuel cells (SOFC)
Chemical analysis
Powders
Oxides
Cathodes
Thermodynamics
solid oxide fuel cells
Temperature
Air
cathodes
routes
thermodynamics
oxides
Experiments

All Science Journal Classification (ASJC) codes

  • Inorganic Chemistry
  • Physical and Theoretical Chemistry
  • Materials Chemistry

Cite this

Miyoshi, S., Onuma, S., Kaimai, A., Matsumoto, H., Yashiro, K., Kawada, T., ... Yokokawa, H. (2004). Chemical stability of La 1-xSr xCrO 3 in oxidizing atmospheres. Journal of Solid State Chemistry, 177(11), 4112-4118. https://doi.org/10.1016/j.jssc.2004.04.054

Chemical stability of La 1-xSr xCrO 3 in oxidizing atmospheres. / Miyoshi, Shogo; Onuma, Shigenori; Kaimai, Atsushi; Matsumoto, Hiroshige; Yashiro, Keiji; Kawada, Tatsuya; Mizusaki, Junichiro; Yokokawa, Harumi.

In: Journal of Solid State Chemistry, Vol. 177, No. 11, 01.11.2004, p. 4112-4118.

Research output: Contribution to journalArticle

Miyoshi, S, Onuma, S, Kaimai, A, Matsumoto, H, Yashiro, K, Kawada, T, Mizusaki, J & Yokokawa, H 2004, 'Chemical stability of La 1-xSr xCrO 3 in oxidizing atmospheres', Journal of Solid State Chemistry, vol. 177, no. 11, pp. 4112-4118. https://doi.org/10.1016/j.jssc.2004.04.054
Miyoshi, Shogo ; Onuma, Shigenori ; Kaimai, Atsushi ; Matsumoto, Hiroshige ; Yashiro, Keiji ; Kawada, Tatsuya ; Mizusaki, Junichiro ; Yokokawa, Harumi. / Chemical stability of La 1-xSr xCrO 3 in oxidizing atmospheres. In: Journal of Solid State Chemistry. 2004 ; Vol. 177, No. 11. pp. 4112-4118.
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