CaCu3Ti4O12 (CCTO) ceramic possesses high dielectric constant, and study of doping effects on the structure and properties is beneficial for the interpretation and optimization of dielectric properties of CCTO. In this work, we investigated the structure of CaCu3Ti3.95Zr0.05O12(CCTZ) ceramic by X-ray diffraction (XRD) and the properties of dielectric constant, relaxation, impedance, electric modulus at various temperatures with a dielectric analyzer in a broad range of frequency. The XRD results shows that Zr ions with 5% content can absolutely entered the CCTO crystal lattice. The analysis of impedance spectra and electric modulus suggested a close relationship between the electrical properties of grain and grain boundary and dielectric relaxations at low and high temperatures. Zr doping resulted in a large increase of activation energy of grain, while that for grain boundary was almost unchanged.
张圣诗, 滕达, 张磊, 刘军伟. CaCu3Ti3.95Zr0.05O12陶瓷的介电性质研究
[J]. 兴发pt登录学报, 2019, 36(3): 82-87.
ZHANG Shengshi, TENG Da, ZHANG Lei, LIU Junwei. Study on the Dielectric Properties of CaCu3Ti3.95Zr0.05O12 Ceramic
. Journal of Jilin Institute of Chemical Technology, 2019, 36(3): 82-87.