Preparation of Ni/BaTiO₃ Core-shell Particle by Spray Drying Process

Abstract

Ni/BaTiO₃ core-shell particles were successfully prepared using a spray drying of a slurry precursor comprising Ni particles (100 nm) and BaTiO₃ nanoparticles (20 nm) and butyl acetate. In the process, the precursor was atomized using an ultrasonic nebulizer to produce droplets, and subsequently the droplets were fed into a tubular furnace by a carrier gas for evaporating the dispersant. By controlling the pH of precursor, the furnace-temperature profile and the carrier gas flow rate, the Ni/BaTiO₃ particles with a core-shell structure could be prepared. In order to characterize the prepared particles, a scanning electron microscopy and an X−ray diffractometer analysis were used.