メカニカルミリング法によるAgI-Ag_2WO_4系銀イオン伝導性材料の合成 : その1. 非晶質化領域とイオン伝導特性

概要

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Silver-ion-conducting amorphous materials in the system AgI-Ag2WO4 were prepared by use of a high-energy ball-milling process. The amorphous materials were obtained over the wide composition range of 30 to 70 mol% AgI content. The composition range in which the amorphous materials were obtained by the ball-milling process was much wider than the glass-forming region by conventional melt-quenching methods. Raman spectra revealed that the tungsten ions in the amorphous samples were octahedrally coordinated by oxygens as in crystalline α-Ag2WO4. The silver-ion conductivities of the obtained amorphous materials increased with an increase in the AgI content. The amorphous 70AgI-30Ag2WO4(mol%) sample showed the maximum conductivity 1.8×10-2Scm-1 at 298 K among the amorphous samples obtaining by the ball-milling process.
社団法人粉体粉末冶金協会の論文
2004-09-15