Surfactant assisted ball-milling of barium ferrite

Author

Campbell, S.J. ; Kaczmarek, W.A. ; Wu, E. ; Jayasuriya, K.D.

Author_Institution

Dept. of Phys., New South Wales Univ., Kensington, NSW, Australia

Volume

30

Issue

2

fYear

1994

fDate

3/1/1994 12:00:00 AM

Firstpage

742

Lastpage

745

Abstract

The effects of wet-milling barium ferrite in the presence of cationic or anionic surface active substances have been investigated by X-ray diffraction and Mossbauer spectroscopy measurements. Evidence for superparamagnetic relaxation of fine particles, both in the surfactant assisted ball-milled samples and in samples dry-milled in air is obtained from the room temperature and 4.2 K Mossbauer spectra. The similarity between samples milled at pH 3 with the cationic or anionic surfactants is due to electrostatic interactions of the surfactants´ hydrocarbon groups with the positively charged barium ferrite surface

Keywords

Mossbauer effect; X-ray diffraction examination of materials; barium compounds; ferrites; magnetic properties of fine particles; powder technology; superparamagnetism; surface chemistry; 4.2 K; BaFe₁₂O₁₉; Mossbauer spectroscopy; X-ray diffraction; anionic surfactants; ball-milling; barium ferrite; cationic surfactants; electrostatic interactions; fine particles; superparamagnetic relaxation; wet-milling; Barium; Ferrites; Force measurement; Magnetic materials; Magnetic properties; Milling; Powders; Saturation magnetization; Surface morphology; X-ray diffraction;

fLanguage

English

Journal_Title

Magnetics, IEEE Transactions on

Publisher

ieee

ISSN

0018-9464

Type

jour

DOI

10.1109/20.312394

Filename

312394