• Search Research Projects
  • Search Researchers
  • How to Use
  1. Back to previous page

Evidence of Percolation transition in superionic conductor glasses

Research Project

Project/Area Number 05640432
Research Category

Grant-in-Aid for General Scientific Research (C)

Allocation TypeSingle-year Grants
Research Field 物性一般(含基礎論)
Research InstitutionHokkaido University

Principal Investigator

KAWAMURA Junichi  Hokkaido University, Graduate School of Science, Lecturer, 大学院理学研究所, 講師 (50142683)

Project Period (FY) 1993 – 1994
Project Status Completed (Fiscal Year 1994)
Budget Amount *help
¥2,100,000 (Direct Cost: ¥2,100,000)
Fiscal Year 1994: ¥1,300,000 (Direct Cost: ¥1,300,000)
Fiscal Year 1993: ¥800,000 (Direct Cost: ¥800,000)
Keywordssuperionic conductor glass / percolation transition / ionic conductivity / neutron scattering / パーコレーション転移 / 交流伝導度 / 中性子準弾性散乱 / 中性子小角散乱 / マルチ・フラクタル / 有機無機混合系ガラス / 超イオン導電体 / ガラス / 緩和 / 臨界指数 / 中距離秩序
Research Abstract

Percolation theory is one of the promising candidates for explaining universal frequency response in superionic conductor glasses. However, there had been found no real glasses exhibiting a good percolation threshold from ionic conductor to insulator.
In this research project, authors found a clear evidence of percolation transition from superionic conductor to insulators in newly developed organic-inorganic mixed ionic conductor glasses such as AgI-alkylammonium iodides. At higher concentration of AgI the glasses are very good ionic conductors, however below a thresholdphi=0.35 their conductivities are below 10^<-8> S/cm and are almost insulator.
The intermediate range structure of the glasses were investigated by neutron-small angle scattering which revealed the inhomogeneous structure in nano meter scale with fractal dimension 2.8 close to the value predicted by the percolation theory.

Report

(3 results)
  • 1994 Annual Research Report   Final Research Report Summary
  • 1993 Annual Research Report
  • Research Products

    (9 results)

All Other

All Publications (9 results)

  • [Publications] J.Kawamura: "Neutron scattering from AgI-CsI-(CH_3)_4NI glasses" Solid State Ionics. 79. 264-272 (1995)

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      1994 Final Research Report Summary
  • [Publications] J.Kawamura: "Photoelectrochemical pvoperties of multi-layered thin films composed of chalcogenide and superionic conductor glasses" Solid State Ionics. 90. 303-306 (1996)

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      1994 Final Research Report Summary
  • [Publications] J.Kawamura: "Intermediate range structure of organic-inorganic mixed superionic conductor glasses : AgI and tetiaalkylammoniam iodides" Solid State Ionics. 86-88. 517-520 (1996)

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      1994 Final Research Report Summary
  • [Publications] J.Kawamura: "Frequency dependent conductivity of organic-inorganic mixed superionic conductor glasses" Solid State Ionics. (in press). (1998)

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      1994 Final Research Report Summary
  • [Publications] J.Kawamura: "Neutron scattering from AgI-CsI-(CH3)4NI glasses" Solid State Ionics. 79. 264-272 (1995)

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      1994 Final Research Report Summary
  • [Publications] J.Kawamura: "Photoelectrochemical properties of multi-layred thin films composed of chalcogenide and superionic conductor glasses" Solid State Ionics. 90. 303-306 (1996)

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      1994 Final Research Report Summary
  • [Publications] J.Kawamura: "Intermediate range structure of organic-inorganic mixed superionic conductor glasses : AgI and tetraalklammonium iodides" Solid State Ionics. 86-88. 517-520 (1996)

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      1994 Final Research Report Summary
  • [Publications] J.Kawamura: "Frequency dependent conductivity of organic-inorganic mixed superionic conductor glasses" Solid State Ionics. (in press). (1998)

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      1994 Final Research Report Summary
  • [Publications] T.Kamiyama and Y.Nakamura: "AgI-CsI-(CH_3)_4 NI Superionic glasses." Solid State Ionics. (印刷中).

    • Related Report
      1994 Annual Research Report

URL: 

Published: 1993-04-01   Modified: 2016-04-21  

Information User Guide FAQ News Terms of Use Attribution of KAKENHI

Powered by NII kakenhi