Abstract

Nano-sized barium titanate (BaTiO₃) powders with ultra-high crystallinity have been successfully prepared by a hydrothermal condition at 170°C for only 2 h. In this study, the influence of processing parameters on the phase and the particle size of hydrothermally derived BaTiO₃ powders was investigated. The powders were investigated by X-ray diffraction (XRD), scanning election microscopy (SEM), energy-dispersive X-ray spectroscopy (EDAX), field emission transmission electron microscopy (FETEM), selected area electron diffraction (SAED), high resolution transmission electron microscopy (HRTEM) and zetasizer measurement. As a matter of fact, the hydrothermal method guarantees the production of BaTiO₃ nanoparticles with desired morphology for commercial applications. It was found that using Dolapix ET85 strongly enhances the crystallinity of BaTiO₃ and stabilizes its crystal lattice. In addition, uniform particles, size distribution and purity of samples are highly dependent on the applied hydrothermal condition.

Key words: Hydrothermal, nanotechnology, crystallinity, perovskite, barium titanate (BaTiO₃).