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Electric birefringence for monitoring size changes in clay suspensions

Published online by Cambridge University Press:  09 July 2018

I. C. Hinds ,
P. J. Ridler  and
B. R. Jennings
I. C. Hinds
Affiliation:
School of Electronic, Electrical and lnfbrmation Engineering, South Bank University, London, UK
P. J. Ridler
Affiliation:
School of Electronic, Electrical and lnfbrmation Engineering, South Bank University, London, UK
B. R. Jennings
Affiliation:
School of Electronic, Electrical and lnfbrmation Engineering, South Bank University, London, UK
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Abstract

The growth and decay rates of rapid, induced electro-optical phenomena in dilute colloidal suspensions are characteristic of the geometry of the solute particles. The speed of measurement renders such methods especially relevant for fast, in situ analyses of the size and size distribution of colloids in practical, industrial situations where these properties may be undergoing continuous change. The principles of the measurement of electrically induced birefringence using pulsed fields is outlined and used to study vermiculite suspensions as they undergo size reduction in an ultrasonic field. The high sensitivity of the method to both the particle size range and the form of the distribution function is indicated. The use of the method for on-line monitoring of dilute mineral suspensions for the indication and control of aggregated, dissolving or growing media is discussed.

Type
Research Article
Information
Clay Minerals , Volume 31 , Issue 4 , December 1996 , pp. 549 - 556
Copyright
Copyright © The Mineralogical Society of Great Britain and Ireland 1996

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