| 초록 |
Barium titanate (BaTiO3) has perovskite structure and ferroelectric property, that is a material with spontaneous polarization and has a high dielectric constant. So, it is widely used in electronic products such as high energy density capacitors, sensors, detectors, and electro-optic devices. Recently, various research have studied for polymer composites included nanoparticles to increase their dielectric constant and to obtain a high energy density property. BaTiO3 has four kinds of lattice structure, Cubic, Tetragonal, Orthorhombic, and Rhombohedral, and shows the difference of dielectric constant. In this study, we found conditions for phase transition in calcination method. And the change of structure was observed after calcination in furnace. Additionally, Other ceramic powder such as Al2O3, TiO2 was also investigated for comparing dielectric property. In order to analysis the lattice structure and dielectric constant, XRD, impedance meter was measured. |
