Synthesis and characterization of (La1-xMx)2Mo2O9-δ; M=Ca2+, Sr2+ or Ba2+

被引：96

作者：

Subasri, R ^{[1
]}

Matusch, D ^{[1
]}

Näfe, H ^{[1
]}

Aldinger, F ^{[1
]}

机构：

[1] Max Planck Inst Met Res, Pulvermet Lab, Heisenbergstr 3, D-70569 Stuttgart, Germany

来源：

JOURNAL OF THE EUROPEAN CERAMIC SOCIETY | 2004年 / 24卷 / 01期

关键词：

functional applications; impedance; ionic conductivity; powders-chernical preparation; solubility limit; X-ray methods;

D O I：

10.1016/S0955-2219(03)00123-7

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：

The system (La1-xCax)(2)Mo2O9-delta was characterized in the region x = 0.01 less than or equal to x less than or equal to 0.15 by slow-scan powder X-ray diffraction measurements in order to determine the solubility limit of CaO. For the sake of comparison, the same was repeated for (La1-x M-x)(2)Mo2O9-delta where M = Sr2+ or Ba2+ and x = 0.05 and 0.10, respectively. In addition, the electrical conductivities of some of the typical compositions investigated in the present study were measured as a function of temperature by means of the ac impedance technique. The suppression of the phase transition in La2Mo2O9 by the alkaline-earth dopants was verified by differential thermal analysis of the samples. (C) 2003 Elsevier Ltd. All rights reserved.

引用

页码：129 / 137

页数：9

共 7 条

[1]

Fournier J. P., 1970, Bulletin de la Societe Chimique de France, P4277

[2] Crystal structure of La2Mo2O9, a new fast oxide-ion conductor [J].

Goutenoire, F ;

Isnard, O ;

Retoux, R ;

Lacorre, P .

CHEMISTRY OF MATERIALS, 2000, 12 (09) :2575-2580

[3] Structural and transport characteristics of the LAMOX family of fast oxide-ion conductors, based on lanthanum molybdenum oxide La2Mo2O9 [J].

Goutenoire, F ;

Isnard, O ;

Suard, E ;

Bohnke, O ;

Laligant, Y ;

Retoux, R ;

Lacorre, P .

JOURNAL OF MATERIALS CHEMISTRY, 2001, 11 (01) :119-124

[4] The LPS concept, a new way to look at anionic conductors [J].

Lacorre, P .

SOLID STATE SCIENCES, 2000, 2 (08) :755-758

[5] Designing fast oxide-ion conductors based on La2Mo2O9 [J].

Lacorre, P ;

Goutenoire, F ;

Bohnke, O ;

Retoux, R ;

Laligant, Y .

NATURE, 2000, 404 (6780) :856-858

[6] REVISED EFFECTIVE IONIC-RADII AND SYSTEMATIC STUDIES OF INTERATOMIC DISTANCES IN HALIDES AND CHALCOGENIDES [J].

SHANNON, RD .

ACTA CRYSTALLOGRAPHICA SECTION A, 1976, 32 (SEP1) :751-767

[7] Effects of Ca doping on the oxygen ion diffusion and phase transition in oxide ion conductor La2Mo2O9 [J].

Wang, XP ;

Fang, QF .

SOLID STATE IONICS, 2002, 146 (1-2) :185-193

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