Structure and ionic conductivity of rapidly quenched AgI-Ag2WO4 superionic conductor glasses

Megumi Hosono, Junichi Kawamura, Hiroyuki Itoigawa, Naoaki Kuwata, Takashi Kamiyama, Yoshio Nakamura

研究成果: Article査読

33 被引用数 (Scopus)

抄録

Silver ion conducting glasses composed of (AgI)x-(Ag2WO4)1-x (x = 0.80-0.55) were prepared by a rapid melt quenching method. Their physical properties were investigated by X-ray, DSC, impedance and Ag-109 NMR measurements. The glass transition temperatures were in the range from 110°C to 187°C. The glasses show unusually high ionic conductivities of 2.5 × 10-3 S/cm at x=0.55 and 2.3 × 10-1 S/cm at x=0.80, which varied exponentially with increasing AgI content. Ag-109 NMR spectra also support the high mobility of silver ions in the glasses. Structures of the glasses were investigated by FTIR and W-L1 edge XANES. From these results it is concluded that the tungsten ions are octahedrally coordinated by oxygen ions as in crystalline Ag2WC4 and Ag26I18W4O16, which is quite different from the structure of AgI-Ag2MoO4 glasses.

本文言語English
ページ(範囲)81-88
ページ数8
ジャーナルJournal of Non-Crystalline Solids
244
1
DOI
出版ステータスPublished - 1999
外部発表はい

ASJC Scopus subject areas

  • 電子材料、光学材料、および磁性材料
  • セラミックおよび複合材料
  • 凝縮系物理学
  • 材料化学

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