Dispersibility of BaTiO₃ Aqueous Slurries with Poly Ammonium Acrylate Based Dispersant

Abstract

The dispersibility of aqueous BaTiO₃ slurries with poly ammonium acrylate-based dispersant has been investigated. BaTiO₃ particles were well-dispersed in the high pH region and the adsorption behavior of dispersant strongly depended on the slurry pH. The dispersion of BaTiO₃ particles at various pH was also elucidated by characterizing the sedimentation density, viscosity of slurries, amount of adsorbed dispersant and tape-casted green sheets. The microstructures of green sheets fabricated using aqueous BaTiO₃ slurries were found to depend greatly upon the dispersion state of BaTiO₃ particles in the slurries.