Electrical conductivity and ionic transference number of Sr and Baβ-aluminas

被引：10
作者：
He, G
Goto, T [1 ]
Narushima, T
Iguchi, Y
机构：
[1] Tohoku Univ, Inst Mat Res, Sendai, Miyagi 9808577, Japan
[2] Tohoku Univ, Dept Met, Sendai, Miyagi 9808579, Japan
来源：
SOLID STATE IONICS | 1999年 / 124卷 / 1-2期
关键词：
beta-alumina; solid electrolyte; ionic conductor; ionic transference number; oxygen concentration cell;
D O I：
10.1016/S0167-2738(99)00128-9
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：
Ba and Sr beta-alumina ionic conductors were synthesized by solid state sintering at 2033 to 2073 K and their electrical conductivities were measured by a.c. impedance spectroscopy. The electrical conductivities at 1673 K were 2.05 x 10(-2) and 4.6 x 10(-3) S m(-1) for Sr and Ba beta-aluminas, respectively. An oxygen concentration cell and d.c. polarization methods were applied to measure the ionic transference numbers. The values obtained by the two methods were almost in agreement at more than 1400 and 1673 K for Sr beta-alumina and Ba beta-alumina, respectively. Sr beta-alumina could have slightly greater ionic transference numbers than Ba beta-alumina. (C) 1999 Elsevier Science B.V. All rights reserved.
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页码：119 / 124
页数：6
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