Ion dynamics in organic-inorganic composite superionic conductor glasses

Ryo Asayama, Naoaki Kuwata, Junichi Kawamura

Research output: Chapter in Book/Report/Conference proceedingConference contribution

1 Citation (Scopus)

Abstract

Ionic conductivity of organic-inorganic composite superionic conductor glasses composed of AgI and alkylammoniumiodides is measured as a function of frequency, temperature and composition. A clear transition from insulator to superionic conductor is confirmed at the volume fraction of AgI is about 35 %. The dc component of the conductivity is fitted to the σ∼(- c)μ with c=0.36, μ=2.5 for the present data. Near the percolation threshold, a power-law type frequency dependence of ωn (n∼0.67) is seen in mid frequency and ω1.0 at higher frequency corresponding to the constant loss region power-law is observed. The activation energies and preexponential factors derived from the temperature dependence increase from 0.3 to 0.7 eV approaching to the threshold. From these results, the ion dynamics in these glasses can be explained by the static site percolation theory at first approximation, but require the consideration on the chemical bond variation between the Ag and I modified by the organic ions.

Original languageEnglish
Title of host publicationFLOW DYNAMICS
Subtitle of host publicationThe Second International Conference on Flow Dynamics
Pages176-179
Number of pages4
DOIs
Publication statusPublished - 2006 May 5
EventFLOW DYNAMICS: The Second International Conference on Flow Dynamics - Sendai, Japan
Duration: 2005 Nov 162005 Nov 18

Publication series

NameAIP Conference Proceedings
Volume832
ISSN (Print)0094-243X
ISSN (Electronic)1551-7616

Other

OtherFLOW DYNAMICS: The Second International Conference on Flow Dynamics
CountryJapan
CitySendai
Period05/11/1605/11/18

Keywords

  • Frequency dependent ionic conductivity
  • Organic-inorganic composite glass
  • Percolation transition
  • Superionic conductor glass

ASJC Scopus subject areas

  • Physics and Astronomy(all)

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