ZHU Zhiwen, HUANG Xinyou, HUA Haitang, GAO Chunhua

(School of Materials Science and Engineering, Jiangsu University, Zhenjiang, Jiangsu 212013)

Abstract:Ba0.85Ca0.15Ti0.9Zr0.1O3 (abbreviated as BCZT) lead -free piezoelectric ceramics doped with different amounts of basic cobalt carbonate were prepared by a traditional solid state method. The effects of basic cobalt carbonate doping amounts(x=0, 0.55, 0.89, 1.3, 1.8 wt.%) on the phase composition, microstructure, piezoelectric properties and dielectric properties of the as-prepared BCZT ceramics were studied by scanning electron microscope (SEM), X-ray diffraction (XRD) and other analyzing instruments. The results show that when the doping amount (x) is less than 1.3 wt.%, the B-site substitution of Co3+ does not change the crystal structure and all the ceramics possess single-phase perovskite structure with orthorhombic symmetry. When the doping amount (x) is 1.8 wt.%, impurity phases appear. 

Key words:lead-free piezoelectric ceramics; piezoelectric ceramics; basic cobalt carbonate; doped; piezoelectric properties