Title :
Magnetic filtration of ferrofluids
Author :
O´Grady, K. ; Stewardson, H.R. ; Chantrell, R.W. ; Fletcher, D. ; Unwin, D. ; Parker, Michael
Author_Institution :
University College of North Wales, Bangor, Gwynedd, U.K
fDate :
9/1/1986 12:00:00 AM
Abstract :
We have used a modified HGMS apparatus to selectively filter aggregated particles from samples of ferrofluid. We have identified the reduced initial susceptibility
![\\bar{X_{i}} (=[dI/dH]/I_{S})](/images/tex/8762.gif)
as a quality control parameter for fluid stability to field gradients. We show that

is a far more sensitive measure than particle sizing techniques which are insensitive to the presence of aggregates.
Keywords :
Magnetic liquids; Magnetic separation; Aggregates; Filtration; Magnetic devices; Magnetic liquids; Magnetic materials; Magnetic moments; Magnetic separation; Particle measurements; Particle production; Stability;
Journal_Title :
Magnetics, IEEE Transactions on
DOI :
10.1109/TMAG.1986.1064450