SnO_2掺杂对(Ba_(0.85)Ca_(0.15))(Ti_(0.9)Zr_(0.1-x)Sn_x)O_3无铅压电陶瓷介电弛豫与电性能的影响  

Effect of SnO_2 Doping on Dielectric Relaxation and Electrical Properties of Lead-free (Ba_(0.85)Ca_(0.15))(Ti_(0.9)Zr_(0.1-x)Sn_x)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,贵阳550025

出　　处：《人工晶体学报》2016年第4期929-934,940,共7页Journal of Synthetic Crystals

基　　金：贵州省工业攻关资助项目(黔科合GY字[2013]3027)

摘　　要：采用固相烧结法制备了(Ba_(0.85)Ca_(0.15))(Ti_(0.9)Zr_(0.1-x)Sn_x)O_3(BCZTS)无铅压电陶瓷。研究了不同含量SnO_2(x=0,0.02,0.04,0.06,0.08)对BCZT无铅压电陶瓷相结构、压电性能、介电性能和铁电性能的影响,并利用XRD、SEM、准静态d33测试仪等表征样品。结果表明,所有样品均为单一钙钛矿结构。当掺杂x=0.02时,(Ba_(0.85)Ca_(0.15))(Ti_(0.9)Zr_(0.1-x)Sn_x)O_3无铅压电陶瓷材料的综合性能优异:d33=553 p C/N,kp=49%,εr^7474(1 k Hz),tanδ~1.5%(1k Hz),Pr=6.06μC/cm^2,Ec=2 k V/cm,利用Curie-Weiss定律对该实验结果进行拟合,发现x=0.02的样品的介电弛豫特征更为明显。（Ba0.85Ca0.15）（Ti0.9Zr0.1-xSnx）O3（ BCZTS） lead-free piezoelectric ceramics was prepared by the conventional solid-state reaction method. The effect of Sn O2（ x =0,0. 02,0. 04,0. 06,0. 08） concentration on the phase structure,piezoelectric properties,dielectric properties and ferroelectric properties of BCZTS ceramics were characterized by XRD,SEM,d33 measurement tester and other analytical methods. The results show that single phase perovskite structure of BCZTS lead-free piezoelectric ceramics is obtained. The ceramic sample with x = 0. 02 exhibits the optimum properties,i. e. d33= 553 p C / N,kp= 49%,εr- 7474（ 1 k Hz）,tanδ - 1. 5%（ 1 k Hz）,Pr= 6. 06 μC / cm^2,Ec= 2 kV / cm,respectively. The characteristics of dielectric relaxation of ceramic sample with x = 0. 02 is more obvious,which is consistent with the Curie-Weiss law.

关 键 词：无铅压电陶瓷 固相烧结法 介电弛豫 铁电性能 SNO2 

分 类 号：TM282[一般工业技术—材料科学与工程]