TY - JOUR
T1 - Dispersion properties of BaTiO3 colloids with amphoteric polyelectrolytes
AU - Hsu, Kung Chung
AU - Ying, Kuo Liang
AU - Chen, Lung Pin
AU - Yu, Bang Ying
AU - Wei, Wen Cheng J.
PY - 2005
Y1 - 2005
N2 - 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.
AB - 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.
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U2 - 10.1111/j.1551-2916.2005.00112.x
DO - 10.1111/j.1551-2916.2005.00112.x
M3 - Article
AN - SCOPUS:29744465657
SN - 0002-7820
VL - 88
SP - 524
EP - 529
JO - Journal of the American Ceramic Society
JF - Journal of the American Ceramic Society
IS - 3
ER -