TbDyFe掺杂对(Ba_(0.85)Ca_(0.15))(Ti_(0.9)Zr_(0.08)Sn_(0.02))O_3无铅压电陶瓷组织与电性能的影响  

Effect of Tb Dy Fe doping on microstructure and electrical properties of (Ba_(0.85)Ca_(0.15))(Ti_(0.9)Zr_(0.08)Sn_(0.02))O_3 ceramics

作　　者：姚利兰 刘其斌[1] 周顺龙[1] 

机构地区：[1]贵州大学材料与冶金学院,贵州贵阳550025

出　　处：《中国测试》2016年第4期120-124,131,共6页China Measurement & Test

基　　金：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)

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-x TbDyFe(BCZTS-x TbDyFe)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 p C/N,kp=40%,εr^5955,tanδ~1.9%,Pr=6.6μC/cm2,Ec=2 k V/cm。To obtain the superior electrical properties of BCZTS lead-free piezoelectric ceramics by doping the TbDyFe,（Ba0.85Ca0.15）（Ti0.9Zr0.08Sn0.02）O3-x TbDyFe [abbreviated as BCZTS-x TbDyFe]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-x TbDyFe ceramics shows that this system ceramic has dielectric relaxation characteristics. The ceramic with x=0.1 wt.% exhibits the optimum properties： d33= 500 p C/N,kp=40%,εr^5955,tanδ~1.9%,Pr=6.6 μC/cm2,Ec=2 k V/cm.

关 键 词：无铅压电陶瓷 固相烧结法 TbDyFe 压电性能 

分 类 号：TM282[一般工业技术—材料科学与工程]