Oxide ion conduction in A-site deficient La-Ti-Al-O perovskite

被引：27

作者：

Yoshioka, H ^{[1
]}

Kikkawa, S

机构：

[1] Hyogo Prefectural Inst Ind Res, Kobe, Hyogo 6540037, Japan

[2] Osaka Univ, Inst Sci & Ind Res, Osaka 5670047, Japan

来源：

JOURNAL OF MATERIALS CHEMISTRY | 1998年 / 8卷 / 08期

关键词：

D O I：

10.1039/a801926f

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：

Oxide ion conduction in A-site deficient La-Ti-Al-O perovskites is demonstrated by complex impedance analysis and EMF measurements with an oxygen concentration cell. The oxide ion conductivity increases with decreasing the Al content. The enhancement of the conductivity has strong relation to the cation vacancy ordering and c-axis parameter expansion which were revealed by Rietveld refinement on the X-ray diffraction patterns. Dielectric relaxation which is remarkable considering the small Al content is explained by high ionic conductivity in the bulk grain and a high capacitance value in the grain boundary.

引用

页码：1821 / 1826

页数：6

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