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Journal of Materials Science

, Volume 41, Issue 19, pp 6256–6259 | Cite as

The effect of Sb and Nb on the electrical conductivity of tin dioxide based ceramics

  • D. R. Leite
  • I. O. Mazali
  • E. C. Aguiar
  • W. C. Las
  • M. Cilense
Article

Abstract

The electrical conductivity of Mn doped SnO2 systems prepared by an organic route (Pechini’s method) has been investigated as a function of antimony and niobium concentration. The conductivity increases with the increase of both concentration ions, however, in a different manner. While the conductivity of niobium doped ceramics increases with the power of 1.6 for the entire range of concentrations studied (0.01–0.7 mol%), the conductivity of antimony doped ceramics increases with the power of 1.9 in the range 0.01–0.05 mol% of Sb; 3.7 in the range 0.05–0.30 mol% and 1.8 in the range 0.30–0.70 mol%. This behavior is attributed to the existence of two stable oxidation states for antimony: Sb3+ and Sb5+, while for niobium there is only one: Nb5+. The power of 3.7 for Sb would be related to the segregation of this ion on the grain boundary accompanied by an additional contribution coming from the substitution of Sn2+ by Sb3+ on the grain surface.

Keywords

SnO2 Oxygen Vacancy Antimony Sb2O4 Conductivity Behavior 

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Copyright information

© Springer Science+Business Media, LLC 2006

Authors and Affiliations

  • D. R. Leite
    • 1
  • I. O. Mazali
    • 1
  • E. C. Aguiar
    • 1
  • W. C. Las
    • 1
  • M. Cilense
    • 1
  1. 1.Departamento de Físico-QuímicaInstituto de Química – UNESPAraraquaraBrazil

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