Annealing Effect on Magnetic-Properties of Si-Modified Gamma-Fe2o3 Particles
Journal
Journal of Magnetism and Magnetic Materials
Journal Volume
89
Journal Issue
1月2日
Pages
167-172
Date Issued
1990
Author(s)
Abstract
Acicular γFe2O3 particles are synthesized by dehydration, reduction and oxidation of acicular γFeOOH particles. The annealing treatment has been added preceding the reduction step in the preparation of acicular γFe2O3 particles. We studied the annealing effect from the investigation of particle morphology, coercive force as well as magnetization. It has been found that Si adsorption on the surface of the particle will significantly improve the annealing effect. Furthermore, it causes an anomalous increase in the coercive force. The origins of annealing effect and Hc enhancement are discussed. © 1990.
SDGs
Type
journal article