High conductivity and mechanical loss due to mobile fluoride ions in PbF2MnF2Al(PO3)3 glasses

A. R. Kulkarni, C. A. Angell

Research output: Contribution to journalArticlepeer-review

14 Scopus citations


New fluoride glasses in the system PbF2MnF2Al(PO3)3 have been synthesised and found to have high d.c. conductivities, presumably due to mobile F ions. A.C. electrical data (25-200°C) have been analyzed by impedance spectroscopy. A glass with the composition 85PbF25MnF210Al(PO3)3 yields a record value for conductivity in an anionic conducting glass, σ200 = 1.1 × 10-4(ω-cm)-1, nearly two orders of magnitude higher than the best values so far reported. Electrical and mechanical relaxation data have been compared in the isofrequency-inverse temperature representation. As seen previously for cation conductors, the mechanical relaxation is less exponential (broader) than the electrical relaxation. However, in the present case the most probable mechanical relaxation time is shorter than the most probable electrical relaxation time.

Original languageEnglish (US)
Pages (from-to)1115-1121
Number of pages7
JournalMaterials Research Bulletin
Issue number9
StatePublished - Sep 1986
Externally publishedYes


  • Fluoride glasses

ASJC Scopus subject areas

  • Materials Science(all)
  • Condensed Matter Physics
  • Mechanics of Materials
  • Mechanical Engineering


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