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Stability of Aqueous Suspensions of High Surface area Zirconia Powders in the Presence of Polyacrylic Acid Polyelectrolyte

Published online by Cambridge University Press:  25 February 2011

Michel M. R. Boutz ,
R. J. M. Olde Scholtenhuis ,
A. J. A. Winnubst  and
A. A. J. Burggraaf
Michel M. R. Boutz
Affiliation:
University of Twente, Faculty of Chemical Technology, Laboratory for Inorganic Chemistry, Materials Science and Catalysis, P.O. Box 217, 7500 AE Enschede, The Netherlands.
R. J. M. Olde Scholtenhuis
Affiliation:
University of Twente, Faculty of Chemical Technology, Laboratory for Inorganic Chemistry, Materials Science and Catalysis, P.O. Box 217, 7500 AE Enschede, The Netherlands.
A. J. A. Winnubst
Affiliation:
University of Twente, Faculty of Chemical Technology, Laboratory for Inorganic Chemistry, Materials Science and Catalysis, P.O. Box 217, 7500 AE Enschede, The Netherlands.
A. A. J. Burggraaf
Affiliation:
University of Twente, Faculty of Chemical Technology, Laboratory for Inorganic Chemistry, Materials Science and Catalysis, P.O. Box 217, 7500 AE Enschede, The Netherlands.
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Abstract

In this paper results of efforts to prepare stable aqueous suspensions of high surface area (> 100 m2 /gr) yttria stabilized tetragonal zirconia powders are presented using a low molecular weight ammonium polyacrylic acid deflocculant. Zetapotentials, viscosities, agglomerate sizes and sedimentation volumes have been measured to find the optimum pH and deflocculant concentration. It has been found that the optimum pH-value coincides with the pH at which the polyacrylic acid is fully dissociated. Using deflocculant concentrations below the optimum value leads to a highly unstable system, while concentrations above the optimum value influence the stability in a much weaker way.

Type
Research Article
Information
MRS Online Proceedings Library (OPL) , Volume 271: Symposium N – Better Ceramics Through Chemistry V , 1992 , 303
Copyright
Copyright © Materials Research Society 1992

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References

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