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J. Am. Cerum. SOC., 71 14) 250-55 (1988) Stability of ,Aqueousa=Al203Suspensionswith
 

Summary: J. Am. Cerum. SOC., 71 14) 250-55 (1988)
Stability of ,Aqueousa=Al203Suspensionswith
Poly(methacry1ic acid) Polyelectrolyte
JOSEPH CESARANO III* and ILHAN A. AKSAY*
Department of Materials Science and Engiineering, College of Engineering, University of Washington, Seattle, Washington 98195
ALAN BLEIER*
Metals and Ceramics Division, Oak Ridge National Laboratory,* Oak Ridge, Tennessee 37831
Stability of aqueous a-A1,O3 suspensions with Na+ salt of
poly(methacry1icacid) (PMAA-Na) polyelectrolyte was studied
as a function of pH. At a given pH, the transition from the
flocculated to the dispersed state corresponded to the ad-
sorption saturation limit of the powders by the PMAA. As the
pH was decreased, the adsorption saturation limit increased
until insolubility and charge neutralizatioinof the PMAA was
approached. The critical amount of PMAA required to achieve
stability is outlined in a stability map.
I. Introduction
OR many applications in ceramic processing it is desirable to
Fsinter at relatively low temperatures and to obtain fully dense
and fine-grain microstructures. One method by which these goals

  

Source: Aksay, Ilhan A. - Department of Chemical Engineering, Princeton University

 

Collections: Materials Science