Preparation of Barium Titanate Nanocoated Silica Nanoparticles by Chemical Solution Deposition

抄録

After preparing SiO₂-BaTiO₃ particles with core–shell structure using metal alkoxide method, we attempted to prepare a homogeneous BaTiO₃ coating layer by molecular design of a BaTiO₃ precursor solution used in the coating process. The molecular design was achieved by controlling the steric hindrance of the metal alkoxide. The molecular design effect on the coating process was investigated using transmission electron microscopy (TEM) and energy-dispersive X-ray spectrometry (EDS) with a scanning electron microscope (SEM). Results show that the coating process comprised the wettability of the alkoxide precursor solution to the core particles and the chemical reactivity of the alkoxide precursor solution. Additionally, we inferred the wettability of the alkoxide precursor solution as a major factor affecting the coating process.