Co_2O_3掺杂对BCZT基无铅压电陶瓷组织与电性能的影响  

Influence of Co_2O_3 Doping on Properties of BCZT Lead-free Piezoelectric Ceramics

作　　者：蔡恩培 刘其斌[1,2] 姚利兰 周顺龙[1] 薛安[1] 曾芳芳 CAI Enpei LIU Qibin YAO Lilan ZHOU Shunlong XUE An ZENG Fangfang(College of Materials and Metallurgy, Guizhou University, Guiyang 550025, China Key Laboratory of Material Structure and Strength of Guizhou Province, Guiyang 550025, China)

机构地区：[1]贵州大学材料与冶金学院,贵阳550025 [2]贵州省材料结构与强度重点实验室,贵阳550025

出　　处：《中国陶瓷》2017年第10期63-68,共6页China Ceramics

基　　金：贵州省高层次创新人才培养计划((2015)4009);贵州省工业和信息技术发展规划专项资金(2016056)

摘　　要：以传统固相烧结合成法制备出Co_2O_3掺杂的无铅压电陶瓷材料Ba_(0.85)Ca_(0.15)Zr_(0.1)Ti_(0.9)O_3-xCo_2O_3(BCZT-xCo,x=0~0.15 wt%)。通过X射线衍射(XRD)和扫描电子显微镜(SEM)以及其他分析方法研究Co_2O_3掺杂量对制备的BCTZ无铅压电陶瓷的压电性能、介电性能、相组成以及微观结构的影响。结果表明,所有样品均具有纯钙钛矿相结构。随着Co_2O_3掺杂量的增加,晶粒尺寸、介电损耗tanδ、压电系数d_(33)和平面机电耦合系数k_p逐渐减小,而介电常数ε_r逐渐增加。当x=0 wt%时,BCZT-xCo无铅压电陶瓷具有最佳压电性能:d_(33)=420 pC/N,k_p=40%;x=0.15%时,BCZT-xCo无铅压电陶瓷具有最佳介电性能:ε_r=5,100,tanδ=1.4%。Lead-free piezoelectric ceramics（Ba_（0.85）Ca_（0.15））（Zr_（0.1）Ti_（0.9））O_3-xCo_2O_3（BCZT-xCo,x=0~0.15 wt%）were prepared successfully using a solid-state reaction technique.Influence of Co_2O_3 doping amount on the piezoelectric properties,dielectric properties,phase composition and microstructure of prepared BCTZ lead-free piezoelectric ceramics doped with Co_2O_3 were investigated by X-ray diffraction（XRD）,scanning electron microscopy（SEM）and other analytical methods.The results show that all the samples possess a pure perovskite phase structure.With the increasing of Co_2O_3 content,the grain size decreased gradually,together with decrease of the dielectric loss tanδ,piezoelectric coefficient d_（33） and planar electromechanical coupling factor of k_p.While the dielectric constant ε_r increased gradually.When x=0,BCZT lead-free piezoelectric ceramics have the best piezoelectric properties with d_（33）=420 pC/N,kp=40%;x=0.15%,BCZT lead-free piezoelectric ceramics have the best dielectric properties with ε_r of 5,100,tanδ of 1.4%.

关 键 词：(Ba(0.85)Ca(0.15))(Zr(0.1)Ti(0.9))O3-xCo2O3 掺杂 无铅压电陶瓷 电性能 

分 类 号：TM282[一般工业技术—材料科学与工程]