Frequency dependent conductivity of organic-inorganic mixed superionic conductor glasses

Junichi Kawamura, Naoaki Kuwata, Yoshio Nakamura

Research output: Contribution to journalArticlepeer-review

14 Citations (Scopus)

Abstract

In order to detect local motion of mobile silver cations in organic-inorganic mixed glasses composed of AgI and alkylammonium iodides, their electrical conductivity at radio and microwave frequencies was measured in different compositions. Although their DC conductivity shows a clear transition from insulator to superionic conductor at AgI volume fraction φ ∼0.35, the high frequency value is continuous at the threshold. Details of frequency dependence were measured at room temperatures from DC to 10 GHz. Only a small dependence was seen in the high conducting glasses, however, the sample near the percolation threshold showed power-law dependence σ[ω] ∼ ωn at low frequency whose slope n ∼ 0.6 and approaches to unity at high frequencies.

Original languageEnglish
Pages (from-to)703-709
Number of pages7
JournalSolid State Ionics
Volume113-115
DOIs
Publication statusPublished - 1998 Dec 1

Keywords

  • Alkylammonium iodides
  • Composite
  • Percolation threshold
  • Silver iodide

ASJC Scopus subject areas

  • Chemistry(all)
  • Materials Science(all)
  • Condensed Matter Physics

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