Defects in scandium doped barium zirconate studied by Sc-45 NMR

Itaru Oikawa, Mariko Ando, Yasuto Noda, Koji Amezawa, Hajime Kiyono, Tadashi Shimizu, Masataka Tansho, Hideki Maekawa

Research output: Contribution to journalArticle

11 Citations (Scopus)

Abstract

Local structure around Sc in BaZr1 - xScxO3 - δ protonic conductor has been investigated by 45Sc MAS-NMR. The MAS-NMR spectra were consisted of several peaks, which can be assigned to Sc in different coordination environment. Compositional dependence of the spectrum was observed. The coordination environment of Sc is determined from the peak deconvolution, and the oxygen vacancy concentration and the protonic defect concentration around Sc were obtained. The present investigation suggests that oxygen vacancies preferentially located around Sc and the concentration of oxygen vacancies in the vicinity of Sc increases with increasing the Sc content. Protonic defects were found to be preferentially located around Sc at lower Sc content.

Original languageEnglish
Pages (from-to)83-87
Number of pages5
JournalSolid State Ionics
Volume192
Issue number1
DOIs
Publication statusPublished - 2011 Jun 16

Keywords

  • BaZrO
  • Defect structure
  • Magic-angle spinning NMR
  • Protonic conductor
  • Sc-45 NMR

ASJC Scopus subject areas

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

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    Oikawa, I., Ando, M., Noda, Y., Amezawa, K., Kiyono, H., Shimizu, T., Tansho, M., & Maekawa, H. (2011). Defects in scandium doped barium zirconate studied by Sc-45 NMR. Solid State Ionics, 192(1), 83-87. https://doi.org/10.1016/j.ssi.2010.04.025