Hydrogen permeability in Ce0.8Yb0.2O1.9 at high temperatures

被引：23

作者：

Nigara, Y ^{[1
]}

Kawamura, K ^{[1
]}

Kawada, T ^{[1
]}

Mizusaki, J ^{[1
]}

机构：

[1] Tohoku Univ, Sci Measurements Res Inst, Aoba Ku, Sendai, Miyagi 9808577, Japan

来源：

SOLID STATE IONICS | 2000年 / 136卷 / 136-137期

关键词：

hydrogen permeability; fluorite-type oxide; electron-proton mixed conductor; activation energy of Ce0.8Yb0.2O1.9;

D O I：

10.1016/S0167-2738(00)00313-1

中图分类号：

O64 [物理化学（理论化学）、化学物理学];

学科分类号：

070304 ; 081704 ;

摘要：

It was found that hydrogen permeated Ce0.8Yb0.2O1.9 (fluorite-type) at 1800-1000 K, which was sintered at 1970 K in air. The tube shared two specimens were used to measure the hydrogen permeability, J(H). Log(J(H)/mol h(-1) cm(-1)) decreases with reducing temperature and is proportional to reverse temperature at 1800-1500, 1500-1300 and 1200-1000/K. The activation energies were 0.92+/-0.06, 1.10+/-0.06 and 0.58+/-0.05/eV, respectively. Ce0.8Yb0.2O1.9 would be an electron-proton mixed conductor under H-2-H2O atmosphere at high temperature. (C) 2000 Elsevier Science B.V. All rights reserved.

引用

页码：215 / 221

页数：7

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