Abstract
ABSTRACT The purpose of this research is to evaluate the effectiveness of various dispersants in fine particle processing. The surface of alumina in aqueous solution was modified by using both non-ionic and ionic surfactants. The rheological properties of highly loaded alumina suspensions were studied as a function of surfactant concentration. Pressure filtration experiments were also carried out in order to evaluate the dispersion properties and consolidation behavior. The pressure filtration results could be used to distinguish between well-dispersed and flocculated slurries. The results of rheology measurements and pressure filtration experiments are interpreted using suitable models. To assist the analysis, electrokinetic sonic amplitude (ESA) technique was used for characterization of electrical double layer.
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