Particle Structure and Dielectric Permittivity of Ferroelectric Nanoparticle

钛酸钡(BaTiO_3)粒子的表面结构与内部结构不同，其介电性能与粒子结构有关。在本研究中发现，颗粒结构和介电常数依赖于缺陷浓度和化学成分。低介电常数是由于介电常数较低的表面层较厚所致。铁电微粉的介电性能由其颗粒结构解释。

Surface structure of barium titanate (BaTiO3) particle is different from inner structure, and the dielectric properties of BaTiO3 nanoparticles depend on the particle structure. In this study, it was found that the particle structure and permittivity depended on defect concentrations and chemical composition. Low permittivity was due to the thick surface layer with low permittivity. The dielectric properties of ferroelectric fine particles were explained by their particle structures.