Chemical surface exchange of oxygen on Y2O 3-stabilized ZrO2

K. Sasaki, J. Maier

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17 Citations (Scopus)

Abstract

The chemical surface exchange of oxygen at single-crystalline Y 2O3-stabilized ZrO2 surfaces is studied using the in situ optical absorption relaxation technique. The surface exchange coefficients depend on temperature, oxygen partial pressure, and redox-active dopant concentration in a dilute concentration range; they depend only slightly on surface orientation, and become independent of annealing time after a long time treatment (typically at 800 °C). Using the thermodynamic factor of oxygen (which sensitively depends on redox-active impurities) derived from the known defect chemical parameters of this material, the effective macroscopic chemical rate constants are analyzed. The correlation with effective tracer rate coefficients is discussed for this model electron-poor ionic conductor.

Original languageEnglish
Pages (from-to)145-154
Number of pages10
JournalSolid State Ionics
Volume161
Issue number1-2
DOIs
Publication statusPublished - Jul 2003

All Science Journal Classification (ASJC) codes

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

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