Defect structure and electrical properties of La1-ySryFe1-xAlxO3-δ

被引：18

作者：

Kuscer, D ^{[1
]}

Hanzel, D ^{[1
]}

Holc, J ^{[1
]}

Hrovat, M ^{[1
]}

Kolar, D ^{[1
]}

机构：

[1] Jozef Stefan Inst, Ljubljana 1000, Slovenia

来源：

JOURNAL OF THE AMERICAN CERAMIC SOCIETY | 2001年 / 84卷 / 05期

关键词：

D O I：

10.1111/j.1151-2916.2001.tb00803.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：

La1-ySryFe1-xAlxO3-delta perovskites were studied as potential materials for solid-oxide fuel cell (SOFC) cathodes. The phase relations in the LaFeO3-SrFeO3-delta-LaAlO3 system were investigated by X-ray powder diffraction analysis. The defect structure of the La1-ySryFe1-xAlxO3-delta perovskites was investigated by Mossbauer spectroscopy and weight-loss analysis. Relations between the nonstoichiometry and the conductivity of the La1-ySryFe1-xAlxO3-delta perovskites were investigated. The incorporation of aluminum (x) into LaFe1-xAlxO3 was found to have no influence on the defect structure but to decrease the conductivity. The incorporation of strontium OI) into La1-ySryFe1-xAlxO3-delta promotes the formation of anion vacancies and Fe4+ that lead to higher conductivity.

引用

页码：1148 / 1154

页数：7

共 17 条

[1] BERKSTRESSER GW, 1991, J CRYST GROWTH, V109, P467, DOI 10.1016/0022-0248(91)90218-T
[2] THE EFFECT OF OXYGEN STOICHIOMETRY ON PHASE-RELATIONS AND STRUCTURE IN THE SYSTEM LA1-XSRXFEO3-DELTA (0-LESS-THAN-OR-EQUAL-TO-X-LESS-THAN-OR-EQUAL-TO-1, 0-LESS-THAN-OR-EQUAL-TO-DELTA-LESS-THAN-OR-EQUAL-TO-0.5)
DANN, SE
CURRIE, DB
WELLER, MT
THOMAS, MF
ALRAWWAS, AD
[J]. JOURNAL OF SOLID STATE CHEMISTRY, 1994, 109 (01) : 134 - 144
[3] CRYSTALLOGRAPHIC STUDIES OF PEROVSKITE-LIKE COMPOUNDS .1. RARE EARTH ORTHOFERRITES AND YFEO3, YCRO3, YALO3
GELLER, S
WOOD, EA
[J]. ACTA CRYSTALLOGRAPHICA, 1956, 9 (06): : 563 - 568
[4] CRYSTALLOGRAPHIC STUDIES OF PEROVSKITE-LIKE COMPOUNDS .4. RARE EARTH SCANDATES, VANADITES, GALLIATES, ORTHOCHROMITES
GELLER, S
[J]. ACTA CRYSTALLOGRAPHICA, 1957, 10 (04): : 243 - 248
[5] HIGH-PRESSURE STUDIES ON FERRITES
HALASA, NA
DEPASQUALI, G
DRICKAMER, HG
[J]. PHYSICAL REVIEW B, 1974, 10 (01) : 154 - 164
[6] Electrical and microstructural characterisation of (La0.8Sr0.2)(Fe1-xAlx)O-3 and (La0.8Sr0.2)(Mn1-xAlx)O-3 as possible SOFC cathode materials
Holc, J
Kuscer, D
Hrovat, M
Bernik, S
Kolar, D
[J]. SOLID STATE IONICS, 1997, 95 (3-4) : 259 - 268
[7] ELECTRICAL CONDUCTIVITIES OF SRFEO3-DELTA AND BAFEO3-DELTA PEROVSKITES
HOMBO, J
MATSUMOTO, Y
KAWANO, T
[J]. JOURNAL OF SOLID STATE CHEMISTRY, 1990, 84 (01) : 138 - 143
[8] HROVAT M, 1996, P 2 EUR SOL OX FUEL, V1, P383
[9] ELECTRIC AND MAGNETIC PROPERTIES OF STRONTIUM TERRATES
MACCHESNEY, JB
SHERWOOD, RC
POTTER, JF
[J]. JOURNAL OF CHEMICAL PHYSICS, 1965, 43 (06) : 1907 - +
[10] ELECTRONIC CONDUCTIVITY, SEEBECK COEFFICIENT, AND DEFECT STRUCTURE OF LAFEO3
MIZUSAKI, J
SASAMOTO, T
CANNON, WR
BOWEN, HK
[J]. JOURNAL OF THE AMERICAN CERAMIC SOCIETY, 1982, 65 (08) : 363 - 368

← 1 2 →