Abstract
Viscometry was used to investigate the microstructural properties of various magnetic particle suspensions. Our study was focused primarily on the shape (acicular versus plate-like effects) of magnetic particles, magnetic particle and/or floc concentration, as well as the effects of shear rate. Mean field theory and the Mooney equation were adopted to estimate a maximum packing concentration of magnetic particles ( ∝) as well as the intrinsic viscosity ([ η]). The values of ∝ and [ η] for different suspensions were used to interpret the microstructure of magnetic particle suspensions. Further, the Casson equation was employed to investigate the dependence of shear rate on the viscosity.
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