Synthesis and characterization of one-dimensional BaTiO3 nanoribbons

Abstract

Barium titanate has been used as a representative material of MLCC which is a component of electronic equipment due to its high dielectric constant. Barium titanate powder with small particle size is needed to satisfy the miniaturization trend of MLCC, but there is a limitation in which the tetragonal phase decreases as the particle size decreases. The following limitation is closely related to the structural model of the BaTiO3 particle. One-dimensional BaTiO3 nanoribbon with the high aspect ratio is necessary to minimize the decrease of tetragonal phase fraction. In this study, we conducted two types of research to synthesize one-dimensional BaTiO3 nanoribbon with high aspect ratio. First, we synthesized BaTiO3 with the addition of various additives known to induce one-dimensional growth and observed the morphology and phase of synthesized particles using SEM and XRD. We could find that the one-dimensional BaTiO3 particles were synthesized when ethylene glycol was added. Second, we changed the synthesis time and the volume fraction of the additive solution while the additives were kept constant with ethylene glycol and we investigated the aspect ratio change of one-dimensional particles. And we calculated the lattice constant ratio (c/a) of tetragonal phase related to dielectric constant. In conclusion, we demonstrated one-dimensional BaTiO3 nanoribbon could overcome the decrease of tetragonal phase originated from the structural limitation of zero-dimensional particles and we could synthesize one-dimensional nanoribbon with tetragonality of 1.0124.