Dispersion properties of BaTiO3 colloids with amphoteric polyelectrolytes

Kung Chung Hsu, Kuo Liang Ying, Lung Pin Chen, Bang Ying Yu, Wen Cheng J. Wei

Research output: Contribution to journalArticle

20 Citations (Scopus)

Abstract

An amphoteric water-soluble copolymer, i.e., poly(acrylamide/(α-N,N- dimethyl-N-acryloyloxyethyl) ammonium ethanate) (PAAM/DAAE), was evaluated as a novel dispersant for aqueous BaTiO3 (BT) slurries. The dispersing property of this copolymer was examined by means of rheology, sedimentation, particle size, green density, zeta potential, and leached Ba2+ concentration measurements. The results indicate that PAAM/DAAE could reduce the viscosity of slurries greatly, cause BT particle sizes to shift to smaller values, and make green compacts more consolidated. Compared with a commercial dispersant, ammonium salt of poly(methacrylic acid) (PMAA-NH4), it is as effective or even better in preparing stabilized suspensions. More importantly, PAAM/DAAE could lessen the leached Ba2+ concentration. This is related to the adsorption behavior of this copolymer onto BT particles, and the interaction between the adsorbed dispersant and dissolved barium ions.

Original languageEnglish
Pages (from-to)524-529
Number of pages6
JournalJournal of the American Ceramic Society
Volume88
Issue number3
DOIs
Publication statusPublished - 2005

ASJC Scopus subject areas

  • Ceramics and Composites
  • Materials Chemistry

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