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 article

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 1 2003
Event11th Cpnference on Solid (SSPC11) - Guildford, United Kingdom
Duration: Aug 27 2002Aug 30 2002

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Oxygen vacancies
Raman spectroscopy
conductors
Oxygen
oxygen
Doping (additives)
Strontium
Defect structures
Temperature
Oxides
Protons
Raman scattering
Solubility
Physical properties
strontium
Annealing
diffusivity
solubility
physical properties
Raman spectra

All Science Journal Classification (ASJC) codes

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

Cite this

Oxygen nonstoichiometry in SrCeO3-based high-temperature protonic conductors evaluated by Raman spectroscopy. / Mineshige, Atsushi; Okada, Sachio; Sakai, Katsura; Kobune, Masafumi; Fujii, Satoshi; Matsumoto, Hiroshige; Shimura, Tetsuo; Iwahara, Hiroyasu; Ogumi, Zempachi.

In: Solid State Ionics, Vol. 162-163, 01.09.2003, p. 41-45.

Research output: Contribution to journalConference article

Mineshige, A, Okada, S, Sakai, K, Kobune, M, Fujii, S, Matsumoto, H, Shimura, T, Iwahara, H & Ogumi, Z 2003, 'Oxygen nonstoichiometry in SrCeO3-based high-temperature protonic conductors evaluated by Raman spectroscopy', Solid State Ionics, vol. 162-163, pp. 41-45. https://doi.org/10.1016/S0167-2738(03)00232-7
Mineshige, Atsushi ; Okada, Sachio ; Sakai, Katsura ; Kobune, Masafumi ; Fujii, Satoshi ; Matsumoto, Hiroshige ; Shimura, Tetsuo ; Iwahara, Hiroyasu ; Ogumi, Zempachi. / Oxygen nonstoichiometry in SrCeO3-based high-temperature protonic conductors evaluated by Raman spectroscopy. In: Solid State Ionics. 2003 ; Vol. 162-163. pp. 41-45.
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AU - Mineshige, Atsushi

AU - Okada, Sachio

AU - Sakai, Katsura

AU - Kobune, Masafumi

AU - Fujii, Satoshi

AU - Matsumoto, Hiroshige

AU - Shimura, Tetsuo

AU - Iwahara, Hiroyasu

AU - Ogumi, Zempachi

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AB - 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.

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