Interaction between dissolved Ba2+ and PAA-NH4 dispersant in aqueous barium titanate suspensions

Chia Chen Li, Jau Ho Jean, C. A. Randall

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Abstract

The interaction between dissolved Ba2+ and dissociated ammonium salt of poly(acrylic acid) (PAA-NH4) in aqueous suspension has been studied. The dissolved Ba2+ causes flocculation of dissociated PAA-NH4, thus degrading its dispersing effectiveness in aqueous BaTiO3 suspensions. The concentration of PAA-NH4 required to stabilize aqueous BaTiO3 suspension increases with increasing Ba2+ concentration at a given pH. A stability map, which is determined by a rheological study, is constructed to describe the amount of PAA-NH4 required to have well-dispersed aqueous BaTiO3 suspensions as a function of Ba2+ concentrations at different pH values.

Original languageEnglish (US)
Pages (from-to)1449-1455
Number of pages7
JournalJournal of the American Ceramic Society
Volume85
Issue number6
DOIs
StatePublished - Jun 2002

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All Science Journal Classification (ASJC) codes

  • Ceramics and Composites
  • Materials Chemistry

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