Ionic conduction and nonstoichiometry in BaxCe0.90Y0.10O3-α

被引：196

作者：

Ma, GL ^{[1
]}

Shimura, T ^{[1
]}

Iwahara, H ^{[1
]}

机构：

[1] Nagoya Univ, Ctr Integrated Res Sci & Engn, Chikusa Ku, Nagoya, Aichi 46401, Japan

来源：

SOLID STATE IONICS | 1998年 / 110卷 / 1-2期

关键词：

protonic conduction; perovskite-type oxide; hydrogen concentration cell;

D O I：

10.1016/S0167-2738(98)00130-1

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：

Ionic conduction in both stoichiometric and nonstoichiometric perovskite-type oxide sinters BaxCe0.90Y0.10O3-alpha (x = 0.80-1.20) has been investigated over temperature range 600-1000 degrees C. X-ray powder diffraction patterns of the specimens sintered at 1650 degrees C for 10 h suggested that these oxides consist of a single phase of orthorhombic perovskite-type BaCeO3, except for Ba0.80Ce0.90Y0.10O3-alpha that was observed to contain both perovskite and CeO2 phases. These oxides exhibited excellent protonic conduction under hydrogen-containing atmosphere, whereas they showed poor oxide ionic conduction with predominant electronic one under oxygen-containing atmosphere at high temperatures. Among these oxides, Ba0.95Ce0.90Y0.10O3-alpha showed the highest conductivities under dry air, wet air and wet hydrogen. (C) 1998 ElsevierScience B.V. All rights reserved.

引用

页码：103 / 110

页数：8

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