Characterisation and stability of the fast ion conductor (Bi2O3)1-x(PbO)x

  • Sammes N
  • Tompsett G
  • Phillips R
 et al. 
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Abstract

β-(Bi1-xSbx)8Pb5O17has been shown to have very high oxygen-ion conductivity at temperatures as low as 600°C; 1 s/cm has been reported in the literature. This paper describes how the material can be characterised using high temperature Raman spectroscopy. The effect of increasing x allows for a broadening of the peaks in the Raman spectra and a shift towards lower wavenumber. This can be explained in terms of the Sb atom deforming the room temperature tetragonal β-structure and an incipient phase change in the high temperature β-phase. This paper also describes the effect of low oxygen partial pressure on the sample. In general, as x increases, the width of the ionic domain, and hence the low Po2stability, increases down to approximately Po2= 10-13atmospheres. Below this dopant concentration, the stability again reduces.

Author-supplied keywords

  • Ion conduction
  • Raman spectroscopy
  • Stability

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Authors

  • N. M. Sammes

  • G. Tompsett

  • R. Phillips

  • C. Carson

  • A. M. Cartner

  • M. G. Fee

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