Re-analysis of defect equilibria and transport parameters in Y2O3-stabilized ZrO2 using EPR and optical relaxation

K. Sasaki, J. Maier

研究成果: Contribution to journalArticle

127 引用 (Scopus)

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The defect chemistry and transport properties of single-crystalline 9.5 mol% Y2O3-stabilized ZrO2 selectively doped with 3d transition metal or rare earth ions, are analyzed. In-situ and ex-situ EPR (ESR) and optical absorption spectroscopy are applied to quantify the concentrations of the redox-active ions in specific valence states as a function of temperature and oxygen partial pressure, as well as to measure the chemical diffusion coefficients of oxygen. Relevant self-consistent defect equilibrium constants (oxygen incorporation, dopant ion ionization) and transport coefficients (mobilities of electrons, holes, and oxygen vacancies) are extracted. The analysis uses the significance of trapping effects for the thermodynamic factor of oxygen, and the fact that the activity coefficient of oxygen vacancies, even though non-trivial, does not depend on pO2 or minor redox-active impurities.

元の言語英語
ページ(範囲)303-321
ページ数19
ジャーナルSolid State Ionics
134
発行部数3-4
DOI
出版物ステータス出版済み - 10 2 2000
外部発表Yes

All Science Journal Classification (ASJC) codes

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

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