MAGNETITE TO MAGHEMITE TRANSFORMATION IN ULTRAFINE PARTICLES
Open Access
- 1 April 1977
- journal article
- Published by EDP Sciences in Le Journal de Physique Colloques
- Vol. 38 (C1) , C1-321
- https://doi.org/10.1051/jphyscol:1977166
Abstract
The conversion of magnetite to maghemite has been studied kinetically in the ultrafine particle range (77-220 Å) by chemical analysis. X-ray diffraction, and Mössbauer measurements. The reaction is third order. The activation temperatures are relatively low (8 250-11 200 K). Electron hopping in ultrafine magnetite powders is discussed on the basis of the resultsKeywords
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