Oxygen transport properties in ZrO2-CeO2-Y2O3 by SIMS analysis

Hitoshi Naito, Natsuko Sakai, Takanori Otake, Hiroo Yugami, Harumi Yokokawa

研究成果: Article査読

30 被引用数 (Scopus)

抄録

A mixed conductor, ZrO2-CeO2-Y2O3 (Ce-YSZ), exhibits anomalous electrical properties depending on oxygen partial pressure and CeO2 concentration. We measured surface reaction rates and oxygen tracer diffusion coefficients of YSZ with various CeO2 concentrations by secondary ion mass analyses. The Ce concentration dependence of oxygen tracer diffusion coefficient in air corresponds with that of the total electrical conductivity, over which the ionic conductivity is dominant. The surface exchange coefficient, however, had a higher value in the region of 20 to approximately 60 mol% CeO2 containing YSZ compared to other compositions. Ce-YSZ, which contains this region of CeO2 concentration, exhibits high electronic conduction at reducing conditions. The ionic and electronic conductivities are considered to affect the oxygen tracer diffusion coefficient and the surface exchange coefficient, respectively.

本文言語English
ページ(範囲)669-673
ページ数5
ジャーナルSolid State Ionics
135
1-4
DOI
出版ステータスPublished - 2000 11 1

ASJC Scopus subject areas

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

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