Room-temperature solubility behavior of barium titanate in aqueous media

In the present study, the incongruent dissolution of barium from barium tit anate (BaTiO3) has been studied as a function of dispersion pH and powder v olume fraction for two different BaTiO3 powders. In alkaline dispersions, t he barium solubility strongly increases as the pH increases, as suggested b y thermodynamic considerations. At pH <7, the barium solubility reaches a p lateau, the height of which is dependent on the surface area of the powder and the solids loading of the slip. The BaTiO3 surface is completely deplet ed of barium in this region.