Characterization of adsorbed water layers on Y2O3-doped ZrO2

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

Research output: Contribution to journalArticle

132 Citations (Scopus)

Abstract

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.

Original languageEnglish
Pages (from-to)181-204
Number of pages24
JournalSolid State Ionics
Volume143
Issue number2
DOIs
Publication statusPublished - Jun 2 2001
Externally publishedYes

Fingerprint

yttria-stabilized zirconia
conduction
Water
Powders
Oxides
Ionic conduction
water
thermogravimetry
atmospheres
oxides
Thermogravimetric analysis
Protons
Defects
Physisorption
protons
defects
Chemisorption
oxygen ions
chemisorption
Enthalpy

All Science Journal Classification (ASJC) codes

  • Chemistry(all)
  • Materials Science(all)
  • Condensed Matter Physics

Cite this

Characterization of adsorbed water layers on Y2O3-doped ZrO2. / Raz, S.; Sasaki, K.; Maier, J.; Riess, I.

In: Solid State Ionics, Vol. 143, No. 2, 02.06.2001, p. 181-204.

Research output: Contribution to journalArticle

Raz, S. ; Sasaki, K. ; Maier, J. ; Riess, I. / Characterization of adsorbed water layers on Y2O3-doped ZrO2. In: Solid State Ionics. 2001 ; Vol. 143, No. 2. pp. 181-204.
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