Molecular dynamics simulation of yttria-stabilized zirconia

H.W. Brinkman, H.W. Brinkman, Willem J. Briels, H. Verweij

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Abstract

Oxygen diffusion in the oxygen ionic conductor yttria-stabilized zirconia is investigated by means of the molecular dynamics simulation technique. Oxygen ions migrate by means of a discrete hopping process, mainly between neighbouring tetrahedral sites. Diffusion appears to occur in a short time and a long time regime. Only when the oxygen ions have moved over distances much larger than the characteristic distances of the underlying crystal structure, a linear relation is found between the mean square displacement and time. The oxygen tracer diffusion coefficient, obtained from this long time regime, is 1.86 x 10−6 and 3.23 x 10−6 cm2/s at 1759 and 2057 K, respectively. The ionic conductivity, calculated from the tracer diffusion coefficient, agrees well with experimental values.
Original languageUndefined
Pages (from-to)386-390
Number of pages5
JournalChemical physics letters
Volume247
Issue number4-6
DOIs
Publication statusPublished - 1995

Keywords

  • METIS-106453
  • IR-12018

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