Characterization of adsorbed water layers on Y2O3-doped ZrO2

S. Raz, K. Sasaki, J. Maier, I. Riess

研究成果: ジャーナルへの寄稿学術誌査読

162 被引用数 (Scopus)

抄録

Chemisorption and physisorption of water from a humid atmosphere, on the oxide Y2O3-doped ZrO2 (YSZ), were investigated by conductivity measurements and thermogravimetry (TG), in the temperature range 35-700°C. Ionic conduction is indicated to take place in a thin layer of water adsorbed on the oxide. That ionic conduction is most probably proton conduction. At T < 600°C, it can exceed the oxygen ion conduction within the YSZ bulk when the oxide is made of fine powder. The electrical conductivity measurements of YSZ fine powder in humid atmosphere are analyzed in terms of water coverage, defect formation and proton mobility in the water layers. Further analysis of the water coverage is done using TG measurements. The enthalpies of defect formation and migration are determined. Results of preliminary conduction measurements of Al2O3 fine powder in a humid atmosphere reveal considerable similarities to those of YSZ.

本文言語英語
ページ(範囲)181-204
ページ数24
ジャーナルSolid State Ionics
143
2
DOI
出版ステータス出版済み - 6月 2 2001
外部発表はい

!!!All Science Journal Classification (ASJC) codes

  • 化学一般
  • 材料科学一般
  • 凝縮系物理学

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