首页|EFFECT OF PAA-NH_4 DISPERSANT ON DISPERSIBILITY OF AQUEOUS Pb(Zr,Ti)O_3 SLURRIES AND PIEZOELECTRIC PROPERTIES OF RESULTANT SINTERED BODIES

EFFECT OF PAA-NH_4 DISPERSANT ON DISPERSIBILITY OF AQUEOUS Pb(Zr,Ti)O_3 SLURRIES AND PIEZOELECTRIC PROPERTIES OF RESULTANT SINTERED BODIES

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The effect of poly ammonium acrylate (PAA-NH_4) dispersant on the dispersibility of Pb(Zr,Ti)O_3 (PZT) slurries and the piezoelectric properties of resultant PZT sintered bodies was investigated for the establishment of environmentally friendly aqueous processing. The dispersion state and viscosity of PAA-NH4-added PZT aqueous slurries strongly depended on the slurry pH. Well-dispersed PZT slurries with negligibly small Pb~(2+) dissolution were obtained in the alkaline side due to the electrostatic steric hindrance effect of adsorbed polyelectrolyte dispersant molecules with a high dissociation ratio of carboxylic acid groups. The homogeneous dense microstructure and the enhancement of the piezoelectric properties of PZT ceramic bodies were achieved by preparing the aqueous PZT slurry with an optimum amount of dispersant.

PZTaqueous slurrydispersantpiezoelectric properties

M. Fujioka、T. Yaraaguchi、W. Sakamoto、K. Kikuta、S. Hirano

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Department of Applied Chemistry, Graduate School of Engineering, Furo-cho, Chikusa-ku, Nagoya 464-8603, Japan

EcoTopia Science Institute, Nagoya University, Furo-cho, Chikusa-ku, Nagoya 464-8603, Japan

2010

10.4028/www.scientific.net/KEM.421-422.103

Key engineering materials

Key engineering materials

ISSN：1013-9826
年,卷(期)：2010.421/422
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