Dispersibility of BaTiO3 Aqueous Slurries with Poly Ammonium Acrylate Based Dispersant

Abstract

Ùaeªaeç_ïÞÇ¡ÜnªUÜpC^BaTiO 3 nµåaeômªU« â{ ÂEªTqÞ E]êME½ìÁêÞThe dispersibility of aqueous BaTiO 3 slurries with poly ammonium acrylatebased dispersant has been inves tigated. BaTiO 3 particles were welldispersed in the high pH region and the adsorption behavior of disper sant strongly depended on the slurry pH. The dispersion of BaTiO 3 particles at various pH was also elucidat ed by characterizing the sedimentation density, viscosity of slurries, amount of adsorbed dispersant and tapecasted green sheets. The microstructures of green sheets fabricated using aqueous BaTiO 3 slurries were found to depend greatly upon the dispersion state of BaTiO 3 particles in the slurries.

Spherical pellets of BaTiO3 and Ba0.67Sr0.33TiO3 perovskite-type compounds made by a sol–gel oil drop process for non-thermal plasma applications

“…In addition, Sakamoto et al (2003) has shown that at high pH region, the BaTiO 3 particles were stable. Moreover, the density of this solution should be higher than that of oil (to be beneath the oil layer) and lower than that of the sol to allow the drop of sol to pass through the oil-ammonia solution interface.…”

A New Method to Form BaTiO3 Nanomaterials into Spherical Pellets to be Used in a Non-thermal Plasma Catalytic Application

“…Moreover, some works relate that dielectric properties are promoted by use of dispersant [12,13]. The concentrated ammonia is necessary to avoid the carbonation of barium ions, since it was demonstrated that at a mild basic Scheme 1 Synthesis and the two ways to shape forming BaTiO 3 compounds Scheme 2 Assembling description of a non-thermal plasma laboratory reactor pH, BaCO 3 compound could be formed [14,15], whereas for highly concentrated ammonia solutions, this formation is inhibited. Moreover, the density of this solution should be higher than that of oil (to be beneath the oil layer) and lower than that of the sol to allow the drop of sol to pass through the oil-ammonia solution interface.…”

Eco-friendly processing and methods for ceramic materials - A review

“…50) Therefore, well-dispersed powders in water were prepared by carefully selecting the dispersant and adjusting pH towards the alkaline region such that Ba 2+ dissolution and stoichiometry change were successfully eliminated. 51) Lead-containing compounds, as cited by the Environmental Protection Agency (EPA) of the US, is one of the top 17 chemicals posing the greatest threat to human beings and the environment. 52) Lead oxide is one of the main constituents of well-known piezoelectric ceramics such as Pb(Zr,Ti)O3, Pb(Mg1/3Nb2/3)O3-PbTiO3, Pb(Zn1/3Nb2/3)O3-PbTiO3.…”