通过微观形貌对Ba(Ti,Sn)O_3压电陶瓷的结构及压电性能分析

本文采用传统固相合成法制备了(Ba_(1-x)Ca_x)(Ti_(0.98)Sn_(0.02))O_3(BCTS,x=0.00、0.01、0.02、0.03)无铅压电陶瓷,研究了不同烧结温度下Ba(Ti,Sn)O_3压电陶瓷材料的微观形貌对相结构及压电性能的影响。X-射线衍射(XRD)分析表明,所有陶瓷样品均为单一、纯钙钛矿结构,无第二相生成。通过扫描电子显微镜(SEM)图片可知,陶瓷样品在烧结温度为1450℃时,晶粒更加均匀、陶瓷结构更加致密,气孔较少并且晶粒成螺旋状结构生长。当陶瓷烧结温度为1450℃,并且x=0.01时,陶瓷的综合性能达到最佳,其压电常数(d33)达到346pC/N。

Effect of CaCO3 Dopant on Structure and Electrical Properties of Ba(Ti,Sn)O3 Lead-free Piezoelectric Ceramics

(Ba1-xCax) (Ti0.98 Sn0.02) O3 (BCTS,x =0.00,0.01,0.02,0.03) lead-free ceramics were prepared by traditional solid-state reaction method.Effect of microstructure on phase structure and piezoelectric properties with different sintering temperatures were studied.According to the results by X-ray diffraction,all samples possess pure perovskite phases without second phases.By scanning electron microscopy (SEM) images show that the grain was uniform,phases structure was more dense and with less porosity,the grain growth of spiral structure,when the sintering temperatures is 1450 ℃.The optimum electrical properties can be obtained at x=0.01 and sintering temperatures is 1450 ℃:d33 =346 pC/N.