Interactions between lanthanum gallate based solid electrolyte and ceria

被引：64

作者：

Hrovat, M

Ahmad-Khanlou, A

Samardzija, Z

Holc, J

机构：

[1] Jozef Stefan Inst, Ljubljana 1001, Slovenia

[2] Forschungszentrum Julich, D-52425 Julich, Germany

来源：

MATERIALS RESEARCH BULLETIN | 1999年 / 34卷 / 12-13期

关键词：

oxides; electron microscopy; x-ray diffraction; microstructure;

D O I：

10.1016/S0025-5408(99)00220-2

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

Possible interactions between La(0.9)Sr(0.1)Ga(0.8)Mg(0.2)O(2.85) and Gd(2)O(3)-doped CeO(2) (solid electrolyte and anode binding materials, respectively, for solid oxide fuel cells (SOFC)) at 1300 degrees C were studied with diffusion couples and fired powder mixtures. The SrLaGa(3)O(7) compound was detected and its formation was attributed to the diffusion of La(2)O(3) from La(0.9)Sr(0.1)Ga(0.8)Mg(0.2)O(2.85) into Ce(1-x)La(x)O(2-x/2) solid solution. As the resistivity of SrLaGa(3)O(7) is rather high, around 1 M.ohm at 800 degrees C, its presence in the solid electrolyte/anode interface could significantly increase the internal resistivity of an SOFC. (C) 2000 Elsevier Science Ltd.

引用

页码：2027 / 2034

页数：8

共 20 条

[1]

FENG M, 1994, EUR J SOL STATE INOR, V31, P663

[2]

GODICKEMEIER M, 1997, J ELECTROCHEM SOC, V144, P1653

[3] Subsolidus phase equilibria in the La2O3-Ga2O3-NiO system [J].