Sedimentation of monodisperse magnetic particles as studied by means of time-domain dielectric spectroscopy

Citation
Bh. Pettersen et al., Sedimentation of monodisperse magnetic particles as studied by means of time-domain dielectric spectroscopy, COLL SURF A, 143(2-3), 1998, pp. 323-330
Citations number
17
Categorie Soggetti
Physical Chemistry/Chemical Physics
Journal title
COLLOIDS AND SURFACES A-PHYSICOCHEMICAL AND ENGINEERING ASPECTS
ISSN journal
09277757 → ACNP
Volume
143
Issue
2-3
Year of publication
1998
Pages
323 - 330
Database
ISI
SICI code
0927-7757(199812)143:2-3<323:SOMMPA>2.0.ZU;2-#
Abstract
The sedimentation of monodisperse magnetic particles dispersed in water has been studied by means of time-domain dielectric spectroscopy in the freque ncy range 3 MHz to 3 GHz. The particle sizes were 2.8 and 4.5 mu m. We appl ied a magnetic field to the particle suspensions and monitored the dielectr ic response of the system. Suspensions in which the particle diameter was 2 .8 mu m have been studied in detail, varying both the volume fraction of th e disperse phase and the external magnetic field. When a magnetic field is applied linear aggregates are formed, thus influencing both the sedimentati on rate and the structure of the sediments. (C) 1998 Elsevier Science B.V. All rights reserved.