Premium
Interaction between Dissolved Ba 2+ and PAA‐NH 4 Dispersant in Aqueous Barium Titanate Suspensions
Author(s) -
Li ChiaChen,
Jean JauHo
Publication year - 2002
Publication title -
journal of the american ceramic society
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.9
H-Index - 196
eISSN - 1551-2916
pISSN - 0002-7820
DOI - 10.1111/j.1151-2916.2002.tb00295.x
Subject(s) - dispersant , aqueous solution , suspension (topology) , flocculation , aqueous suspension , barium titanate , ammonium , chemistry , inorganic chemistry , chemical engineering , nuclear chemistry , materials science , dispersion (optics) , ceramic , organic chemistry , physics , mathematics , homotopy , pure mathematics , optics , engineering
The interaction between dissolved Ba 2+ and dissociated ammonium salt of poly(acrylic acid) (PAA‐NH 4 ) in aqueous suspension has been studied. The dissolved Ba 2+ causes flocculation of dissociated PAA‐NH 4 , thus degrading its dispersing effectiveness in aqueous BaTiO 3 suspensions. The concentration of PAA‐NH 4 required to stabilize aqueous BaTiO 3 suspension increases with increasing Ba 2+ concentration at a given pH. A stability map, which is determined by a rheological study, is constructed to describe the amount of PAA‐NH 4 required to have well‐dispersed aqueous BaTiO 3 suspensions as a function of Ba 2+ concentrations at different pH values.