Lanthanum-based perovskites obtained in molten nitrates or nitrites

被引：27

作者：

Matei, C.

Berger, D.

Marote, P.

Stoleriu, S.

Deloume, J. P.

机构：

[1] Univ Bucharest, Fac Appl Chem & Mat Sci Politehn, Bucharest 011061, Romania

[2] Univ Lyon 1, UFR Chim & Biochim, F-69622 Villeurbanne, France

来源：

PROGRESS IN SOLID STATE CHEMISTRY | 2007年 / 35卷 / 2-4期

关键词：

molten salt synthesis; LaMO3; perovskite; nanopowders;

D O I：

10.1016/j.progsolidstchem.2007.01.002

中图分类号：

O61 [无机化学];

学科分类号：

070301 ; 081704 ;

摘要：

Lanthanum-based perovskites, LaMO3 (where M = Mn, Fe, Co, Ni), have been synthesised from lanthanum precursors and corresponding 3d transition metal salts in molten alkali metal nitrates or nitrites. The reactivity of eight precursors in three molten salts of different basicity was analysed. Single phase orthorhombic LaMnO3.11, and orthorhombic LaFeO3 have been obtained in molten NaNO2 at 723 K, for 2 h. LaCoO3 is also formed in molten nitrite, but an increase of basicity, by adding Na2O2, was necessary to obtain LaNiO3. The reaction systems were investigated by thermal analysis. X-ray diffraction (XRD), scanning electron microscopy (SEM), energy dispersive X-ray analysis (EDX) and specific surface area measurements (BET method) were used to characterise the synthesised nanopowders. (C) 2007 Elsevier Ltd. All rights reserved.

引用

页码：203 / 209

页数：7

共 18 条

[1] Synthesis of solid materials in molten nitrates [J].