Nonstoichiometry of the perovskite-type solid solution La0.9Ca0.1Cr1-yAlyO3-δ

Junichiro Mizusaki, Mamoru Hasegawa, Keiji Yashiro, Hiroshige Matsumoto, Tatsuya Kawada

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Abstract

Nonstoichiometry of the perovskite-type solid solutions La0.9Ca0.1Cr1-yAlyO3-δ was studied by high-temperature gravimetry under controlled P(O2) atmospheres of 1-10- 23 bar at 1073-1273 K. The observed data were described by a regular solution-like model for the randomly distributed defects of VÖ{radical dot}{radical dot}, CrCr.{radical dot}, CaLa,, and AlCrX. With the increase in y, VÖ{radical dot}{radical dot} formation becomes much easier. For y > 0.8, some fraction of CaLa, becomes surrounded only by AlCrX and VÖ{radical dot}{radical dot} remains around such CaLa, up to high P(O2) to reduce the maximum oxygen content below 3.000.

Original languageEnglish
Pages (from-to)1925-1928
Number of pages4
JournalSolid State Ionics
Volume177
Issue number19-25 SPEC. ISS.
DOIs
Publication statusPublished - Oct 15 2006
Externally publishedYes

All Science Journal Classification (ASJC) codes

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

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