Effect of ionic polarizability on oxygen diffusion in δ-Bi2O3 from atomistic simulation

Dilpuneet S. Aidhy, Susan B. Sinnott, Eric D. Wachsman, Simon R. Phillpot

Research output: Contribution to journalArticle

22 Scopus citations

Abstract

The effect of polarizability of cation dopants on oxygen diffusion in δ-Bi2O3 is determined using molecular-dynamics simulation in which the polarizability of the ions is treated within the shell model. It is found that the magnitude of the oxygen polarizability has no affect on diffusion. However, the high cation polarizability, associated with the lone pair of electrons in Bi, is found to be the key to achieving sustained oxygen diffusion. Consistent with earlier experimental results, the oxygen diffusion path is found to be between oxygen equilibrium sites, which are displaced from the 8c oxygen sites of the fluorite lattice.

Original languageEnglish (US)
Pages (from-to)297-303
Number of pages7
JournalIonics
Volume16
Issue number4
DOIs
StatePublished - May 1 2010

All Science Journal Classification (ASJC) codes

  • Chemical Engineering(all)
  • Materials Science(all)
  • Engineering(all)
  • Physics and Astronomy(all)

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