Slow relaxation kinetics of Sr(Zr, Y)O3 in wet atmosphere

Takao Kudo, Keiji Yashiro, Hiroshige Matsumoto, Kazuhisa Sato, Tatsuya Kawada, Junichiro Mizusaki

Research output: Contribution to journalArticlepeer-review

15 Citations (Scopus)


The electrical conductivity of SrZr0.9Y0.1O3 - δ was measured as a function of temperature and gas partial pressure. Extremely slow conductivity relaxation was observed below 973 K. This is attributed to slow water incorporation/evolution reaction. Unexpectedly, measured electrical conductivities increased with decrease in temperature at temperatures lower than 1023 K. Proton and oxide ion conductivities were deconvoluted from the total conductivity by simple defect-chemical analysis. At low temperatures, the actual proton conductivity was found to be several times higher than those reported.

Original languageEnglish
Pages (from-to)851-854
Number of pages4
JournalSolid State Ionics
Issue number21-26
Publication statusPublished - 2008 Sept 15


  • Electrical conductivity
  • Proton conductor
  • Slow relaxation process
  • Strontium zirconate
  • Water vapor pressure

ASJC Scopus subject areas

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


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