Low-Frequency Dielectric Relaxation of Large Colloidal
Particles in Suspension¹

Z. Mimouni and H. Chehouani

Laboratoire dinstrumentation, de métrologie et des procédés

Faculté des Sciences et Techniques Guéliz, Université Cadi Ayyad

BP 549 Marrakech, Maroc

Received January 09, 2007

Abstract—The dielectric dispersion of an aqueous colloidal suspension is studied in the range of low frequen-
cies. The suspended particles are relatively large compared to those usually studied and, consequently, the
required relaxation frequencies are low. The solvent is a mixture of water and heavy water without the addition
of salt. Measurements are compared with the model of Havriliak–Negami. The suspension of the same particles
(hydrated) resuspended in a viscous solvent (glycerol) is also studied to show the variation in the parameters of
Havriliak–Negami equation.

DOI: 10.1134/S1061933X07060129

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