Thermodynamic properties of complex oxides in the La-Ni-O system

被引：68

作者：

Bannikov, D. O. ^{[1
]}

Cherepanov, V. A. ^{[1
]}

机构：

[1] Ural State Univ, Ekaterinburg 620083, Russia

来源：

JOURNAL OF SOLID STATE CHEMISTRY | 2006年 / 179卷 / 08期

基金：

俄罗斯基础研究基金会;

关键词：

lanthanum nickelates; thermodynamic stability; phase diagram; oxygen nonstoichiometry; CRYSTAL-STRUCTURE; PHASES; PEROVSKITE; NICKEL; CO; DIFFRACTION; STABILITY; ELECTRON; PR; CU;

D O I：

10.1016/j.jssc.2006.05.026

中图分类号：

O61 [无机化学];

学科分类号：

070301 ; 081704 ;

摘要：

Complex oxides La2NiO4+delta, LaN2O7-delta, La4Ni3O10-delta and LaNiO3-delta, the members of Ruddlesden-Popper series Lan+1NinO3n+1, were prepared using citrate precursors. The stability range of LaNiO3-delta in air as well as the oxygen nonstoichiometry of La3Ni2O7-delta and La4Ni3O10-delta as a function of temperature and oxygen partial pressure was determined by means of thermogravimetric technique. Decomposition temperatures of La3N2O7-delta, La4Ni3O10-delta and LaNiO3-delta in air were determined by conductivity measurement method. The boundary of stability for La4Ni3O10-delta was determined by EMF measurements of galvanic cell with oxygen conducting solid electrolyte. The isothermal (1400 K) projection of La-Ni-O system phase diagram to the plane "log(PO2)-relative mole fraction of metal components" was suggested. (c) 2006 Elsevier Inc. All rights reserved.

引用

页码：2721 / 2727

页数：7

共 33 条

[1] COMPOSITION AND STRUCTURE OF 2 HITHERTO UNIDENTIFIED PHASES IN THE SYSTEM LA2O3-NIO-O [J].