作者：姚利兰, 刘其斌, 周顺龙

作者单位：贵州大学材料与冶金学院, 贵州 贵阳 550025

关键词：无铅压电陶瓷;固相烧结法;TbDyFe;压电性能

摘要：

为获得BCZTS无铅压电陶瓷优良的电性能,通过对其掺杂TbDyFe,采用传统固相烧结法制备(Ba0.85Ca0.15)(Ti0.9Zr0.08Sn0.02)O3-xTbDyFe(BCZTS-xTbDyFe)无铅压电陶瓷,分析不同TbDyFe(x=0~0.4wt.%)含量对BCZTS无铅压电陶瓷微结构、压电性能、介电性能和铁电性能的影响,并利用XRD、SEM等方法分析表征样品。结果表明:所有样品均为单一的钙钛矿结构;掺杂TbDyFe后陶瓷的晶粒尺寸变小。由介电温谱可知,掺杂TbDyFe后BCZTS体系出现介电弛豫行为。当掺杂x=0.1wt.%时,无铅压电陶瓷材料的综合性能优异:d33=500 pC/N,kp=40%,r~5955,tan~1.9%,Pr=6.6 C/cm2,Ec=2 kV/cm。

Effect of TbDyFe doping on microstructure and electrical properties of (Ba_0.85Ca_0.15)(Ti_0.9Zr_0.08Sn_0.02)O₃ ceramics

YAO Lilan, LIU Qibin, ZHOU Shunlong

College of Materials and Metallurgy, Guizhou University, Guiyang 550025, China

Abstract: To obtain the superior electrical properties of BCZTS lead-free piezoelectric ceramics by doping the TbDyFe, (Ba_0.85Ca_0.15)(Ti_0.9Zr_0.08Sn_0.02)O₃-xTbDyFe [abbreviated as BCZTS-xTbDyFe] lead-free piezoelectric ceramics is fabricated by the conventional solid-state reaction method. The effect of TbDyFe(x=0-0.4wt.%) concentration on the microstructure, phase structure, piezoelectric properties, dielectric properties and ferroelectric properties of BCZTS ceramics are systematically investigated by means of XRD, SEM and other analytical methods. The experimental results reveal that single phase perovskite structure is obtained. The grain size of those samples decreases as the increase of TbDyFe concentration. Temperature dependence of the dielectric constant and dielectric loss for BCZTS-xTbDyFe ceramics shows that this system ceramic has dielectric relaxation characteristics. The ceramic with x=0.1 wt.% exhibits the optimum properties: d₃₃= 500 pC/N,k_p=40%, ε_r~5955,tanδ~1.9%,P_r=6.6 μC/cm², E_c=2 kV/cm.

Keywords: lead-free piezoelectric ceramic;solid-state reaction method;TbDyFe;piezoelectric properties

2016, 42(4): 120-124,131  收稿日期: 2015-12-23;收到修改稿日期: 2016-02-02

基金项目: 国家自然科学基金项目(51362004);贵州省工业攻关资助项目(黔科合GY字[2013]3027)

作者简介: 姚利兰(1987-),女,广东梅州市人,硕士研究生,专业方向为功能材料。

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