Phase equilibria and crystal structures of mixed oxides in the La-Mn-Ni-O system

被引：10

作者：

Demina, AN ^{[1
]}

Cherepanov, VA ^{[1
]}

Petrov, AN ^{[1
]}

Klokova, MV ^{[1
]}

机构：

[1] Gorki State Univ, Ekaterinburg 620083, Russia

来源：

INORGANIC MATERIALS | 2005年 / 41卷 / 07期

基金：

俄罗斯基础研究基金会;

关键词：

D O I：

10.1007/s10789-005-0201-2

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

The phase equilibria and crystal structures of mixed oxides in the ternary system La2O3-Mn3O4-NiO are studied at 1100 degrees C in air. The projection of the La-Mn-Ni-O phase diagram at 1100 degrees C and p(O2) = 0.21 x 10(5) Pa onto the metal-composition triangle is found to comprise 12 phase fields. The lattice parameters of La2NiO4 (sp. gr. I4/mmm), La3Ni2O7 (sp. gr. Cmcm), La4Ni3O10 (sp- gr. Cmca), and La1+xMn1-x-yNiyO3 solid solutions (sp. gr. Pnma, -0.04 <= x <= 0.05, 0 <= 0.4) are determined. The composition stability limits of La4Ni3-yMnyO10 solid solutions are 0 < y <= 0.05. With increasing Ni concentration in La1-xMn1-x-yNiyO3, the metal nonstoichiometry decreases from -0.04 <= x <= 0.05 at y = 0 to x = 0 at y = 0.4.

引用

页码：736 / 742

页数：7

共 34 条

[31] Neutron diffraction, synchrotron radiation and EXAFS spectroscopy study of crystal structure peculiarities of the lanthanum nickelates Lan+1NinOy (n=1,2,3) [J].