On the Thermodynamic Stability of BiFeO3

被引：323

作者：

Selbach, Sverre M. ^{[1
]}

Einarsrud, Mari-Ann ^{[1
]}

Grande, Tor ^{[1
]}

机构：

[1] Norwegian Univ Sci & Technol, Dept Mat Sci & Engn, N-7491 Trondheim, Norway

来源：

CHEMISTRY OF MATERIALS | 2009年 / 21卷 / 01期

关键词：

ROOM-TEMPERATURE; PEROVSKITE; CRYSTAL; ENTHALPIES; BISMUTH; OXIDES; REGULARITIES; LANTHANIDE; ENERGETICS; SR;

D O I：

10.1021/cm802607p

中图分类号：

O64 [物理化学（理论化学）、化学物理学];

学科分类号：

070304 ; 081704 ;

摘要：

The thermodynamic stability of BiFeO3 is investigated by high temperature X-ray diffraction and isothermal heat treatment of Bi2O3-Fe2O3 powder mixture as well as phase pure BiFeO3 prepared by a wet chemical route. Experimental evidence for decomposition of BiFeO3 to Bi25FeO39 and Bi2Fe4O9 in the temperature interval 720-1040 K is reported. The experimental observations are discussed in terms of available thermodynamic data for the system. Finally, the stability of BiFeO3 and related Bi-based perovskites is discussed in relation to Goldschmidt tolerance factor and the influence of pressure and chemical substitution.

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页码：169 / 173

页数：5

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