Electronic and ionic conductivities and point defects in ytterbium sesquioxide at high temperature

  • Carpentier J
  • Lebrun A
  • Perdu F
 et al. 
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Abstract

From the study of complex impedance diagrams applied to a symmetric cell Pt-Yb2O3-Pt, the authors have shown the mixed character of electrical conduction within the ytterbium sesquioxide. The measurements were performed at thermodynamic equilibrium in the temperature range from 1423 to 1623 K and the partial pressure of oxygen range from 10-12to 1 atm. The variations of ionic and electronic conductivity as a function of PO2, were interpreted in terms of point defects e′, ḣ, V‴Yband YbI {combining triple dot above}, in the general case of a Frenkel disorder. The relative contributions and the activation energies of conduction of these different defects were determined. © 1982.

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Authors

  • Jean Louis Carpentier

  • André Lebrun

  • Francis Perdu

  • Pierre Tellier

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