THERMOGRAVIMETRIC STUDY OF RARE-EARTH MANGANITES SMMNO3, DYMNO3, YMNO3, ERM O3, YBMNO3 AT 1200-DEGREES-C

被引：63

作者：

KAMATA, K

NAKAJIMA, T

NAKAMURA, T

机构：

[1] ISOLITE INSULATING PROD CO LTD, TOYOKAWA 442, JAPAN

[2] TOKYO INST TECHNOL, ENGN MAT RES LAB, TOKYO 152, JAPAN

来源：

MATERIALS RESEARCH BULLETIN | 1979年 / 14卷 / 08期

关键词：

D O I：

10.1016/0025-5408(79)90065-5

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

The free energy changes of formation of SmMnO3, DyMnO3, YMnO3, ErMnO3 and YbMnO3 were determined to be -14.3, -11.1, -11.4, -11.2 and -10.5kcal/mol, respectively, at 1200°C on the basis of the equilibria. Simultaneously, the nonstoichiometry was also investigated in the oxygen partial pressure below logPO2[atm]=0. The free energy change and the width of nonstoichiometry in these ternary oxides were revealed to be dependent on the radius of rare earth ion. YbMnO3 showed no deviation from stoichiometry in contrast with LaMnO3. © 1979.

引用

页码：1007 / 1012

页数：6

共 11 条

[1]

GALLAGHER, ASTM25747 CARDS

[2]

GALLAGHER, ASTM25330 CARDS

[3] CRYSTALLOGRAPHIC STUDIES OF PEROVSKITE-LIKE COMPOUNDS .1. RARE EARTH ORTHOFERRITES AND YFEO3, YCRO3, YALO3 [J].