Electronic conductivity of scandia-stabilized zirconia doped with 1 mol% CeO 2

T. Shimonosono, H. Kishimoto, K. Yamaji, M. Nishi, M. E. Brito, T. Horita, H. Yokokawa

Research output: Chapter in Book/Report/Conference proceedingConference contribution

Abstract

The electronic conductivity of scandia-stabilized zirconia doped with 1 mol% CeO 2 (1 mol% CeO 2 - 10 mol% Sc 2O 3 - 89 mol% ZrO 2, 1Ce10ScSZ) was measured at 1173-1273 K in the oxygen partial pressure range (p(O 2)) of 10 -4-10 -20 MPa. At 1273 K, the electronic conductivity of 1Ce10ScSZ was in proportion to the 1/4 and -1/4 power of p(O 2) due to the hole and electron conductions in higher and lower p(O 2) regions (> 10 -6 and < 10 -17 MPa), respectively. Upper deviation of electronic conductivity was observed at 1273 K in p(O 2) range of 10 -6-10 -17 MPa. Such a deviation had the p(O 2) dependency similar to the product of Ce 3+ and Ce 4+ concentrations obtained by thermodynamic calculations. Interestingly, the deviation of electronic conductivity disappeared at 1173 K. This indicates that the activation energy of electronic conduction contributed by 1 mol% Ce dopant was significantly higher than 2.01 eV reported for (Ce xZr 1-xO 2) 0.8(YO 1.5) 0.2 with Ce content of x = 0.1.

Original languageEnglish
Title of host publicationECS Transactions
Pages193-199
Number of pages7
Volume45
Edition1
DOIs
Publication statusPublished - 2012
Externally publishedYes
EventIonic and Mixed Conducting Ceramics 8 - 221st ECS Meeting - Seattle, WA, United States
Duration: 2012 May 62012 May 10

Other

OtherIonic and Mixed Conducting Ceramics 8 - 221st ECS Meeting
CountryUnited States
CitySeattle, WA
Period12/5/612/5/10

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ASJC Scopus subject areas

  • Engineering(all)

Cite this

Shimonosono, T., Kishimoto, H., Yamaji, K., Nishi, M., Brito, M. E., Horita, T., & Yokokawa, H. (2012). Electronic conductivity of scandia-stabilized zirconia doped with 1 mol% CeO 2 In ECS Transactions (1 ed., Vol. 45, pp. 193-199) https://doi.org/10.1149/1.3701309