Phase equilibria in the pseudo-binary system SrO-Fe2O3

被引：60

作者：

Fossdal, A ^{[1
]}

Einarsrud, MA ^{[1
]}

Grande, T ^{[1
]}

机构：

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

来源：

JOURNAL OF SOLID STATE CHEMISTRY | 2004年 / 177卷 / 08期

关键词：

phase diagram; solid solution; SrO-Fe2O3; stability;

D O I：

10.1016/j.jssc.2004.05.007

中图分类号：

O61 [无机化学];

学科分类号：

070301 ; 081704 ;

摘要：

The phase relations in the pseudo-binary system SrO-Fe2O3 have been investigated in air up to 1150degreesC by means of powder X-ray diffraction and thermal analysis. Sr3Fe2O7-delta, SrFeO3-delta and SrFe12O19 are stable phases in the entire investigated temperature region, whereas Sr2FeO4-delta and Sr4FC3O10-delta decompose above 930 +/- 10degreesC and 8 50 +/- 25degreesC, respectively. Sr4Fe6O13+/-delta is entropy-stabilized relative to SrFeO3-delta and SrFe12O19 above 775 +/- 25degreesC. Extended solid-solution Sr1+/-xFeO3-delta was demonstrated. On the Fe-deficient side, the extent of solid solubility appeared to decrease gradually with temperature, whereas an abrupt decrease due to formation of Sr4Fe6O13+/-delta was observed above 775degreesC on the Sr-deficient side. (C) 2004 Elsevier Inc. All rights reserved.

引用

页码：2933 / 2942

页数：10

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