Paper Title:
Deflocculation of Alumina Suspensions Using Polyelectrolyte Dispersants
  Abstract

In this paper, the dispersing abilities of three polyelectrolytes, poly (acrylic acid), poly (acrylic acid-co-acrylate), and a four-member copolymer containing various anionic functional groups were tested for aqueous Al2O3 suspensions. The influence of the dispersants on the surface charge of the powder was evaluated by measuring the zeta potential in dilute Al2O3 suspensions. It was found that all the three dispersants shifted the isoelectric point to a lower pH value. Rheological measurements showed that the four-member dispersant decreased the viscosity in the widest pH range, which should be ascribed to the synergistic effect of different functional groups. The 58vol% concentrated Al2O3 slurry using the four-member dispersant was further consolidated using gel casting and was fully sintered at 1600oC.

  Info
Periodical
Edited by
Katsutoshi Komeya, Yohtaro Matsuo and Takashi Goto
Pages
81-84
DOI
10.4028/www.scientific.net/KEM.352.81
Citation
Y. Q. Liu, L. Gao, "Deflocculation of Alumina Suspensions Using Polyelectrolyte Dispersants", Key Engineering Materials, Vol. 352, pp. 81-84, 2007
Online since
August 2007
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