Comprehensive survey of Nd3+ substitution In La2Mo2O9 oxide-ion conductor

被引：42

作者：

Corbel, Gwenael ^{[1
]}

Durand, Pierrick ^{[1
]}

Lacorre, Philippe ^{[1
]}

机构：

[1] Univ Maine, UMR 6010, CNRS, Lab Oxydes & Fluorures, F-72085 Le Mans 9, France

来源：

JOURNAL OF SOLID STATE CHEMISTRY | 2009年 / 182卷 / 05期

关键词：

La2Mo2O9; LAMOX; Phase diagram; Metastability; Internal strain gradient; CRYSTAL-STRUCTURE; LAMOX FAMILY; METASTABILITY;

D O I：

10.1016/j.jssc.2009.01.016

中图分类号：

O61 [无机化学];

学科分类号：

070301 ; 081704 ;

摘要：

Differential thermal analysis Coupled to temperature-control led diffraction have given evidence of a topological metastability phenomenon in an extended compositional range of the La2-xNdxMo2O9 solid Solution. A metastable-stable phase diagram is proposed for this series of LAMOX-type fast oxide-ion conductors. In the Nd range 0<x <= 0.35, a freezing of the oxygen/vacancy disorder of the beta-phase at ambient temperature can be achieved through a splat-quenching to water-ice mixture or/and shaping/sintering into pellet. In the intermediate 0.4 <= x <= 1.2 range, the amount of beta-metastable phase grows upon substitution for powders. The negative impact of beta-metastable to alpha phase transition on conductivity tends to disappear through the partial stabilization of the P phase by shaping/sintering. (C) 2009 Elsevier Inc. All rights reserved.

引用

页码：1009 / 1016

页数：8

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