Hydrothermal Synthesis of BaTiO3 Assisted with Ball Milling

The novel hydrothermal synthesis assisted with ball milling during hydrothermal treatment was developed. Barium titanate (BaTiO3) powder prepared by this method and the effect of the ball milling was evaluated. The starting materials were sub-micron sized TiO2 powder and Ba(OH)2. The synthesized BaTiO3 powders were characterized by X-ray diffraction (XRD), a laser scattering particle size distribution analyzer and a field emission scanning electron microscopy (FE-SEM). The XRD patterns showed that the BaTiO3 powders were synthesized at 100°C and for 5 h with little contamination. The present BaTiO3 powders observed by FE-SEM were regularly agglomerated. The agglomerated particle size estimated from SEM micrograph was 152±42 nm, which corresponded to the particle size distribution measured by a lazar scatter method. Furthermore, as for BaTiO3 synthesis from Ba(OH)2 and sub-micron sized TiO2 powder, the rate constant of BaTiO3 powder fabricated from assistance of ball milling process was increased (2.5×10-2), as compared to a conventional hydrothermal reaction.