BaCu0.5W0.5O3掺杂改性Li0.04Na0.52K0.44Nb0.86Ta0.10Sb0.04O3无铅压电陶瓷  

LEAD-FREE Li_(0.04)Na_(0.52)K_(0.44)Nb_(0.86)Ta_(0.10)Sb_(0.04)O_3 PIEZOELECTRIC CERAMICS MODIFIED BY BaCu_(0.5)W_(0.5)O_3 DOPING

作　　者：卫巍[1] 江向平[1] 陈超[1] 涂娜[1] 李小红[1] 

机构地区：[1]景德镇陶瓷学院材料科学学院,江西省先进陶瓷材料重点实验室,江西景德镇333403

出　　处：《陶瓷学报》2011年第1期21-25,共5页Journal of Ceramics

基　　金：国家自然科学基金(编号:50862005,50562002);教育部新世纪优秀人才支持计划(编号:NCET-06-0576);江西省自然科学基金(编号:2008GZC0009,2009GQC0065);江西省对外科技合作项目(编号:赣财教[2008]212);江西省高等学校“先进陶瓷材料”科技创新团队

摘　　要：以传统固相法制备了(1-x)Li0.04Na0.52K0.44Nb0.86Ta0.10Sb0.04O3-xBaCu0.5W0.5O3[简称(1-x)LF4-xBCW]无铅压电陶瓷,研究了不同BCW掺杂量(x=0%,0.1%,0.2%,0.5%,1%,摩尔分数)对LF4陶瓷的显微结构和电性能的影响。结果表明:引入BCW后,材料仍为钙钛矿结构,当x≥1%时,样品由四方相向正交相转变,出现To-t,Tc则随BCW掺入量的增加向低温区移动。BCW掺杂量对LF4的电性能起到"硬性"掺杂作用,其压电常数d33,平面机电耦合系数kp,介电损耗tanδ和介电常数εr均随着BCW含量的增加而降低,而机械品质因素Qm整体提高。此外,BCW的掺入降低了陶瓷的烧结温度并提高了其密度。Lead-free（1-x） Li0.04Na0.52K0.44Nb0.86Ta0.10Sb0.04O3-xBaCu0.5W0.5O3 [（1-x）LF4-xBCW] piezoelectric ceramics have been fabricated by the traditional solid state reaction.The microstructure and electrical properties of LF4 ceramics with different BCW content（x = 0%,0.1%,0.25%,0.5%,1%,in mole） are investigated.The results show that KNN ceramics still have the perovskite structure after being doped with BCW.The structure of samples has changed from tetragonal to orthorhombic when x≥1%,To-t can be detected,and Tc shifts to lower temperature.The modification of BCW doping hardened this material with lower kp,tanδ,d33 and remarkably higher Qm than pure LF4 ceramics.Furthermore,the sintering temperature of LF4 ceramics decreases and the density increases evidently with the increase of BCW content.

关 键 词：掺杂改性 Li0.04Na0.52K0.44Nb0.86Ta0.10Sb0.04O3 无铅压电陶瓷 

分 类 号：TQ174.75[化学工程—陶瓷工业]