The stability and mixed conductivity in La and Fe doped SrTiO3 in the search for potential SOFC anode materials

被引：110

作者：

Fagg, DP ^{[1
]}

Kharton, VV

Kovalevsky, AV

Viskup, AP

Naumovich, EN

Frade, JR

机构：

[1] Univ Aveiro, UIMC, Ceram & Glass Engn Dept, P-3810 Aveiro, Portugal

[2] Belarusian State Univ, Inst Physicochem Problems, Minsk 220080, BELARUS

来源：

JOURNAL OF THE EUROPEAN CERAMIC SOCIETY | 2001年 / 21卷 / 10-11期

关键词：

electrical conductivity; ionic conductivity; perovskites; strontium titanate ferrites; thermal expansion;

D O I：

10.1016/S0955-2219(01)00125-X

中图分类号：

TQ174 [陶瓷工业]; TB3 [工程材料学];

学科分类号：

0805 ; 080502 ;

摘要：

Both physical properties and the level of mixed conduction obtained in La and Fe doped SrTiO3 are widely influenced by composition. In contrast to La free compositions, La containing compositions show high stability against reaction with yttria stabilised zirconia (YSZ) and a closely matching thermal expansion coefficient (similar to1 X 10(-5) K-1). Faradaic efficiency measurements for Sr0.97Ti0.6Fe0.4O3-delta, and La0.4Sr0.5Ti0.6Fe0.4O3-delta show ionic transference numbers in air between 5 x 10(-3) to 4 x 10(-2), and 2 x 10(-4) to 6 x 10(-4) respectively, decreasing with decreasing temperature. The substitution of La for Sr is observed to deplete the level of both ionic and total conductivity obtained in air. (C) 2001 Published by Elsevier Science Ltd.

引用

页码：1831 / 1835

页数：5

共 13 条

[1] Characterisation, conductivity and mechanical properties of the oxygen-ion conductor La0.9Sr0.1Ga0.8Mg0.2O3-x [J].

Drennan, J ;

Zelizko, V ;

Hay, D ;

Ciacchi, FT ;

Rajendran, S ;

Badwal, SPS .

JOURNAL OF MATERIALS CHEMISTRY, 1997, 7 (01) :79-83

[2] Oxygen stoichiometry of Sr0.97(Ti,Fe)O3-δ materials [J].

Ferreira, AAL ;

Abrantes, JCC ;

Jurado, JR ;

Frade, JR .

SOLID STATE IONICS, 2000, 135 (1-4) :761-764

[3] OXYGEN REDUCTION AT LA0.5SR0.5MNO3 THIN-FILM YTTRIA-STABILIZED ZIRCONIA INTERFACE STUDIED BY IMPEDANCE SPECTROSCOPY [J].

GHARBAGE, B ;

PAGNIER, T ;

HAMMOU, A .

JOURNAL OF THE ELECTROCHEMICAL SOCIETY, 1994, 141 (08) :2118-2121

[4] STRUCTURAL TRANSITIONS AT HIGH-TEMPERATURE IN SR2FE2O5 [J].

GRENIER, JC ;

EA, N ;

POUCHARD, M ;

HAGENMULLER, P .

JOURNAL OF SOLID STATE CHEMISTRY, 1985, 58 (02) :243-252

[5] Electrochemical permeability of Sr0.7(Ti,Fe)O3-δ materials [J].

Jurado, JR ;

Figueiredo, FM ;

Gharbage, B ;

Frade, JR .

SOLID STATE IONICS, 1999, 118 (1-2) :89-97

[6] Faradaic efficiency and oxygen permeability of Sr0.97Ti0.60Fe0.40O3-δ perovskite [J].

Kharton, VV ;

Kovalevsky, AV ;

Viskup, AP ;

Figueiredo, FM ;

Frade, JR ;

Yaremchenko, AA ;

Naumovich, EN .

SOLID STATE IONICS, 2000, 128 (1-4) :117-130

[7] OXIDE-ION CONDUCTION IN SOLID-SOLUTIONS LN(1-X)SR(X)COO(3-DELTA)(LN=LA,PR,ND) [J].

KHARTON, VV ;

NAUMOVICH, EN ;

VECHER, AA ;

NIKOLAEV, AV .

JOURNAL OF SOLID STATE CHEMISTRY, 1995, 120 (01) :128-136

[8] ELECTRICAL-PROPERTIES OF CERIA-DOPED YTTRIA [J].

MARQUES, FMB ;

WIRTZ, GP .

JOURNAL OF THE AMERICAN CERAMIC SOCIETY, 1991, 74 (03) :598-605

[9] STABILITY OF THE PEROVSKITE PHASE LABO3 (B = V, CR, MN, FE, CO, NI) IN REDUCING ATMOSPHERE .1. EXPERIMENTAL RESULTS [J].

NAKAMURA, T ;

PETZOW, G ;

GAUCKLER, LJ .

MATERIALS RESEARCH BULLETIN, 1979, 14 (05) :649-659

[10] Niobium based tetragonal tungsten bronzes as potential anodes for solid oxide fuel cells: synthesis and electrical characterisation [J].

Slater, PR ;

Irvine, JTS .

SOLID STATE IONICS, 1999, 120 (1-4) :125-134

← 1 2 →