MOSSBAUER STUDY OF HIGH-TEMPERATURE DIFFUSION IN MAGNETITE

被引:13
作者
BECKER, KD [1 ]
VONWURMB, V [1 ]
机构
[1] UNIV HANOVER,SFB 173,W-3000 HANOVER,GERMANY
来源
HYPERFINE INTERACTIONS | 1990年 / 56卷 / 1-4期
关键词
D O I
10.1007/BF02405453
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
A Mössbauer investigation has been made of the temperature dependence of cation diffusion in magnetitie, Fe3-δO4. In the temperature range 1100 to 1400°C, spectral line shapes are influenced characteristically by cation diffusion processes. At high oxygen partial pressures, Po2, the in-situ spectra give clear evidence of rapid migration of cations on octahedral sites by a vacancy mechanism, while interstitial processes involving the tetrahedrally coordinated iron ions dominate at low Po2. © 1990 J.C. Baltzer A.G. Scientific Publishing Company.
引用
收藏
页码:1431 / 1435
页数:5
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