Grain boundary conductivity enhancement in ceria-gadolinia solid solutions

被引：0
|
作者：
Ralph, JM [1 ]
Kilner, JA [1 ]
机构：
[1] Univ London Imperial Coll Sci Technol & Med, London SW7 2BP, England
来源：
PROCEEDINGS OF THE FIFTH INTERNATIONAL SYMPOSIUM ON SOLID OXIDE FUEL CELLS (SOFC-V) | 1997年 / 97卷 / 40期
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D O I：
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中图分类号：
O646 [电化学、电解、磁化学];
学科分类号：
081704 ;
摘要：
The electrical conductivity of ceria-gadolinia (CGO) with small additions of calcium have been studied in an attempt to improve the grain boundary conductivity. The results show that a large increase in the grain boundary conductivity is obtained, which is attributed to a higher ionic conductivity calcium phase at the grain boundary. The best total conductivity was found for a 9mol% Gd-1mol% Ca sample. D.C. Conductivity results taken at selected pO(2) at 750 degrees C, showed the conductivity to be ionic at high pO(2)'s and electronic at pO(2)'s lower than 10(-15) atm.
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页码：1021 / 1030
页数：10
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