PMN-PZT压电陶瓷的制备与电学性能研究  

Study on Preparation and Electrical Properties of PMN-PZT Piezoelectric Ceramics

作　　者：张军 李向东 任奕菲[1] ZHANG Jun;LI Xiangdong;REN Yifei(Research Department of Medical Device,Dongguan HEC Research Institute,Dongguan Guangdong 523867;School of Materials Science and Engineering,Huazhong University of Science and Technology,Wuhan Hubei 430074)

机构地区：[1]东莞东阳光研究院医疗器械研究所,广东东莞523867 [2]华中科技大学材料科学与工程学院,湖北武汉430074

出　　处：《湖北理工学院学报》2022年第3期28-34,共7页Journal of Hubei Polytechnic University

基　　金：广东省基础与应用基础研究基金省市联合基金项目(项目编号:181003)。

摘　　要：采用固相法制备了x Pb(Mg_(1/3)Nb_(2/3))O_(3)-(1-x)Pb(Zr_(y) Ti_(1-y))O_(3)压电陶瓷粉体,系统研究了PMN组分含量、Zr/Ti比、烧结温度对其物相、微观形貌及电学性能的影响。结果表明:随着PMN含量变化,压电陶瓷样品内的晶型会发生改变,当x≥0.24时,会出现TiO和PbZrO_(3)杂质相;调整Zr/Ti比,晶型逐渐由四方相变为菱方相,当y=0.48时,四方相与菱方相共存,此时处于准同型相界MPB内。在PMN-PZT三元系压电陶瓷体系中,PMN可以适当降低其烧结温度,抑制晶粒生长。当烧结温度为1250℃时,样品致密性较好,晶粒未出现异常长大,介电损耗明显减小;x=0.21,y=0.48时,x Pb(Mg_(1/3)Nb_(2/3))O_(3)-(1-x)Pb(Zr_(y) Ti_(1-y))O_(3)具有更好的电学性能,d_(33)=557 pC/N,ε_(r)=2200,D=0.013。x Pb(Mg_(1/3)Nb_(2/3))O_(3)-(1-x)Pb(Zr_(y)Ti_(1-y))O_(3)piezoelectric powder was prepared by solid-phase reaction method,and the influence of PMN component content,Zr/Ti ratio,sintering temperature on the phase,microscopic morphology and electrical properties of the ceramic was systematically studied.The results showed that with the change of PMN content,the crystal form would be changed.When x≥0.24,TiO and PbZrO_(3)phases appeared.Adjusting the Zr/Ti ratio,the crystal form gradually changed from tetragonal to rhombohedral.When y=0.48,tetragonal and rhombohedral phases coexisted and they were in MPB at this time.In the PMN-PZT piezoelectric ceramic system,PMN can appropriately reduce the sintering temperature and stop the growth of grains.When sintered at 1250℃,the density was better,the grains didn't grow abnormally,and the dielectric loss was significantly reduced.When x=0.21,y=0.48,x Pb(Mg_(1/3)Nb_(2/3))O_(3)-(1-x)Pb(Zr_(y)Ti_(1-y))O_(3)ceramic had better electrical properties,and it was sintered at 1250℃,d_(33)=557 pC/N,ε_(r)=2200,D=0.013.

关 键 词：固相反应法 压电陶瓷 准同型相界 压电常数 介电常数 

分 类 号：TB34[一般工业技术—材料科学与工程]