Dc and ac Conductivities of (V2O5)x(B2O3) 1-X oxide glasses

H. El Mkami, B. Deroide*, R. Backov, J. V. Zanchetta

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review

42 Citations (Scopus)

Abstract

Glasses of composition (V2O5)x(B2O3) 1-x with x = 0.1, 0.3, 0.5, 0.7 and 0.9 were obtained by a quenching technique. Conductivity measurements using σac were performed on compact pellets of these materials. The conductivity behavior in direct regime, σdc, is described by the "small polaron" model. The room temperature variation of log σdc with the activation energy of each composition, suggests an adiabatic hopping character to the conduction. Application of Hunt's model to describe the ac conductivity behavior shows that the relaxation process has a local character and can be described by hops between each pair of sites.

Original languageEnglish
Pages (from-to)819-826
Number of pages8
JournalJournal of Physics and Chemistry of Solids
Volume61
Issue number5
DOIs
Publication statusPublished - 1 Jan 2000

Keywords

  • Dielectric losses

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