Low temperature sintering and nonlinear dielectric properties of Li2O doped Ba0.6Sr0.4TiO3 ceramics derived from the citrate method

4th International Conference on Advanced Composite Materials and Manufacturing Engineering 2017

材料科学;化学

Zhang, Xiaofei^1 ; Deng, Xiangyi^1 ; Ren, Yuting^1

School of Mathematics and Physics, Hubei Ploytechnic University, Huangshi, China^1

关键词: Citrate methods;    Fine-grained microstructure;    Low-temperature sintering;    Nominal composition;    Nonlinear dielectric properties;    Relative density;    Sintering temperatures;    Transient liquid phase;   

Others  :  https://iopscience.iop.org/article/10.1088/1757-899X/207/1/012032/pdf
DOI  :  10.1088/1757-899X/207/1/012032

学科分类：材料科学（综合）

来源: IOP

【 摘 要 】

A nominal composition of Ba0.6Sr0.4TiO3+ 0.5 wt. % Li2O ceramic specimen was prepared from the citrate method. The addition of Li2O was found to be effective to reduce the sintering temperature of Ba0.6Sr0.4TiO3ceramics, which was attributed to the formation of transient liquid phase. The ceramic specimen sintered at 900 °C showed a fine-grained microstructure with considerable densification and attained the relative density of 97%. The diffusion of Li2O into Ba0.6Sr0.4TiO3lattice was found to have an evident effect on the dielectric properties of the ceramics. The specimen exhibited a dielectric constant of 1997 and a dielectric loss 0.67% at 10 kHz and zero bias-field together with a tenability of 27.8% and a FOM of 41 at 10 kHz and 30 kV/cm.