Phase diagram studies in the quasi binary systems LaMnO3-SrMnO3 and LaMnO3-CaMnO3

被引：20

作者：

Majewski, P ^{[1
]}

Epple, L ^{[1
]}

Rozumek, M ^{[1
]}

Schluckwerder, H ^{[1
]}

Aldinger, F ^{[1
]}

机构：

[1] Max Planck Inst Met Forsch, Pulvermet Lab, D-70569 Stuttgart, Germany

来源：

JOURNAL OF MATERIALS RESEARCH | 2000年 / 15卷 / 05期

关键词：

D O I：

10.1557/JMR.2000.0164

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

The quasi binary systems LaMnO3-SrMnO3 and LaMnO3-CaMnO3 were studied. Both systems show a miscibility gap at intermediate La:Sr and La:Ca ratios below about 1400 degrees C in air. This phenomenon causes the decomposition of single-phase (La,Sr)MnO3-x and (La,Ca)MnO3-x solid solution into La-rich SrMnO3-x + Sr-rich LaMnO3-x and La-rich CaMnO3-x + Ca-rich LaMnO3-x at lower temperatures, respectively. At 1400 degrees C in the system LaMnO3-SrMnO3, a structure transformation of (La,Sr)MnO3 from orthorhombic to rhombohedral with increasing Sr content was not observed, and the structure of La0.7Sr0.3MnO3 was determined to be orthorhombic with a = 0.54927 +/- 0.0009 nm, b = 0.54582 +/- 0.0009 nm, and c = 0.76772 +/- 0.0034 nm.

引用

页码：1161 / 1166

页数：6

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