Oxygen nonstoichiometry in SrCeO3-based high-temperature protonic conductors evaluated by Raman spectroscopy

Atsushi Mineshige, Sachio Okada, Katsura Sakai, Masafumi Kobune, Satoshi Fujii, Hiroshige Matsumoto, Tetsuo Shimura, Hiroyasu Iwahara, Zempachi Ogumi

Research output: Contribution to journalConference articlepeer-review

16 Citations (Scopus)

Abstract

Raman spectra of Yb-doped strontium cerate SrCe1-xYb xO3-δ were measured to evaluate their defect structure, which is much expected to influence their physical properties, such as solubility and diffusivity of protons in these oxides. In spectra, a signal showing existence of oxygen vacancies was observed at about 630 cm-1 for doped samples. The intensity of this band increased with oxygen vacancy formation by Yb-doping and by annealing at high temperatures in dry [low P(H2O)] or reducing [low P(O2)] conditions. Since a clear relationship between a peak intensity of the oxygen vacancy band and dopant concentration was obtained, it was found oxygen nonstoichiometry in SrCe 1-xYbxO3-δ system could be evaluated using this relationship.

Original languageEnglish
Pages (from-to)41-45
Number of pages5
JournalSolid State Ionics
Volume162-163
DOIs
Publication statusPublished - Sep 2003
Externally publishedYes
Event11th Cpnference on Solid (SSPC11) - Guildford, United Kingdom
Duration: Aug 27 2002Aug 30 2002

All Science Journal Classification (ASJC) codes

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

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