THERMAL EFFECTS IN HIGHLY DISPERSED IRON CATALYSTS

被引：0
作者：
ALVAREZ, AM
CAGNOLI, MV
GALLEGOS, NG
MARCHETTI, SG
YERAMIAN, AA
MERCADER, RC
机构：
[1] CINDECA, Departmento de Física, Facultad de Ciencias Exactas, Universidad Nacional de La Plata, La Plata, 1900
来源：
HYPERFINE INTERACTIONS | 1994年 / 83卷 / 1-4期
关键词：
D O I：
10.1007/BF02074299
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 Mossbauer spectra of three Fe/SiO2 catalysts with 5 wt% iron content show the presence of several Fe species and display different magnetic behaviours when the precursors are subjected to various thermal treatments. Based on the Mossbauer parameters and CO chemisorption measurements, the average crystal sizes of the catalysts are estimated and discussed in connection with the thermal pretreatment severity and magnetic properties of the samples.
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页码：357 / 362
页数：6
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