MOSSBAUER INVESTIGATION OF THE GAMMA-]ALPHA-FE2O3 TRANSFORMATION IN SMALL PARTICLES

被引：31

作者：

TRONC, E

JOLIVET, JP

LIVAGE, J

机构：

[1] Chimie de la Matière Condensée (UA 302), U.P.M.C., Paris Cedex 05, 75252

来源：

HYPERFINE INTERACTIONS | 1990年 / 54卷 / 1-4期

关键词：

D O I：

10.1007/BF02396121

中图分类号：

O64 [物理化学（理论化学）、化学物理学]; O56 [分子物理学、原子物理学];

学科分类号：

070203 ; 070304 ; 081704 ; 1406 ;

摘要：

The γ→α-Fe2O3 transformation in 10 nm-sized particles has been investigated with the Mössbauer effect. At 475°C the conversion was completed in about 2 days, it progressed very slowly below. Kinetic measurements at 330°C revealed a pre-transitional shift of the hyperfine field distribution. It has been attributed to the formation of interparticle >Fe-O-Fe< bridges due to the removal of chemisorbed water. Subsequent magnetic and crystalline strains probably drive the recrystallisation. © 1990 J.C. Baltzer A.G. Scientific Publishing Company.

引用

页码：737 / 740

页数：4

共 13 条

[1] A SUPERSTRUCTURE IN SPINELS [J].