POTENTIOSTATIC STEP TECHNIQUE TO STUDY IONIC TRANSPORT IN MIXED CONDUCTORS

被引：33

作者：

NISANCIOGLU, K ^{[1
]}

GUR, TM ^{[1
]}

机构：

[1] NORWEGIAN INST TECHNOL,DEPT CHEM,N-7034 TRONDHEIM,NORWAY

来源：

SOLID STATE IONICS | 1994年 / 72卷

关键词：

D O I：

10.1016/0167-2738(94)90147-3

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：

A potentionstatic step technique was used to measure oxygen transport in the mixed-conducting perovskite SrCo1-xFexO3-delta where x = 0.2, 0.5 and 0.8. A solid state sealed electrochemical cell configuration was employed for this purpose featuring a single crystal yttria-stabilized zirconia solid electrolyte. The chemical diffusion coefficient of oxygen was found to be fast but highly thermally activated. At 850 degrees C, the chemical diffusion coefficient for oxygen was in the range 10(-7)-10(-6) cm(2)/s With the SrCo0.5Fe0.5O3-delta composition exhibiting the higher value. Such rapid rate of oxygen transport makes this material attractive for oxygen selective membranes for high temperature gas separation applications.

引用

页码：199 / 203

页数：5

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