Electronic conductivity of scandia-stabilized zirconia doped with 1 mol% CeO2

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

研究成果: Conference contribution

1 被引用数 (Scopus)

抄録

The electronic conductivity of scandia-stabilized zirconia doped with 1 mol% CeO2 (1 mol% CeO2 - 10 mol% Sc2O 3 - 89 mol% ZrO2, 1Ce10ScSZ) was measured at 1173-1273 K in the oxygen partial pressure range (p(O2)) 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(O2) due to the hole and electron conductions in higher and lower p(O2) regions (> 10-6 and < 10-17 MPa), respectively. Upper deviation of electronic conductivity was observed at 1273 K in p(O2) range of 10-6-10-17 MPa. Such a deviation had the p(O 2) dependency similar to the product of Ce3+ 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 xZr1-xO2)0.8(YO1.5) 0.2 with Ce content of x = 0.1.

本文言語English
ホスト出版物のタイトルIonic and Mixed Conducting Ceramics 8
出版社Electrochemical Society Inc.
ページ193-199
ページ数7
1
ISBN(電子版)9781607683148
ISBN(印刷版)9781566779531
DOI
出版ステータスPublished - 2012
外部発表はい
イベントIonic and Mixed Conducting Ceramics 8 - 221st ECS Meeting - Seattle, WA, United States
継続期間: 2012 5 62012 5 10

出版物シリーズ

名前ECS Transactions
番号1
45
ISSN(印刷版)1938-5862
ISSN(電子版)1938-6737

Other

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

ASJC Scopus subject areas

  • 工学(全般)

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