Thermomagnetic study of surface cobalt modified iron oxide particles derived from oxalic precursors

Author

Gougeon, M. ; Leroy, E. ; Tailhades, Ph. ; Mollard, P. ; Rousset, A.

Author_Institution

Univ. Paul Sabatier, Toulouse, France

Volume

26

Issue

1

fYear

1990

fDate

1/1/1990 12:00:00 AM

Firstpage

57

Lastpage

59

Abstract

The cobalt modification of pure γ-Fe₂O₃ acicular particles by the so-called epitaxial process has been applied to γ-Fe₂O₃ particles, derived from oxalic precursors. Six elaboration parameters have been taken into account for the slurry heat treatment: cable content, pH, time, temperature, gas flowing into the solution, and surface activation. A thermomagnetic study including in situ annealing treatments and magnetic measurements at various temperatures in the range 20-380°C has been carried out. The results are compared with those of commercial surface-cobalt-modified pigments

Keywords

cobalt; ferrites; heat treatment; iron compounds; magnetic annealing; magnetic properties of fine particles; magnetic recording; powder technology; surface treatment; 20 to 380 C; acicular particles; cable content; epitaxial process; gamma Fe₂O₃:Co particles; in situ annealing; magnetic particles; oxalic precursors; pH; slurry heat treatment; surface activation; surface modified particles; temperature dependence; thermomagnetic study; time dependence; Annealing; Cobalt; Heat treatment; Iron; Magnetic variables measurement; Pigments; Slurries; Surface treatment; Temperature distribution; Temperature measurement;

fLanguage

English

Journal_Title

Magnetics, IEEE Transactions on

Publisher

ieee

ISSN

0018-9464

Type

jour

DOI

10.1109/20.50489

Filename

50489