Abstract
Three different ceramic powders, viz. alumina, zirconia and silicon nitride were dispersed using two polyelectrolytes, one cationic (Betz 1190) and the other anionic (Darvan-C). All powders examined during the study could be well dispersed only under conditions of polymer dosage and pH such that the working pH is at least 2 pH units away from the pHIEP of the powder-dispersant combination. The shift in the isoelectric point (IEP) of the powders were determined through electro-acoustic measurements on 1% volume suspensions. Specific free energy of interaction were also computed using a model based on the electrical double layer theory of surfactant absorption.
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Certain trade names and company products are mentioned in the text or identified in illustrations in order to adequately specify the experimental procedure and equipment used. In no case does such identification imply recommendation or endorsement by the authors and their respective institutes nor does it imply that the products are necessarily the best available for the purpose.
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Pradip, Premachandran, R.S. & Malghan, S.G. Electrokinetic behaviour and dispersion characteristics of ceramic powders with cationic and anionic polyelectrolytes. Bull. Mater. Sci. 17, 911–920 (1994). https://doi.org/10.1007/BF02757568
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DOI: https://doi.org/10.1007/BF02757568