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

研究成果: Contribution to journalConference article査読

17 被引用数 (Scopus)


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.

ジャーナルSolid State Ionics
出版ステータス出版済み - 9 2003
イベント11th Cpnference on Solid (SSPC11) - Guildford, 英国
継続期間: 8 27 20028 30 2002

All Science Journal Classification (ASJC) codes

  • 化学 (全般)
  • 材料科学(全般)
  • 凝縮系物理学


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