Synergy of lead vacancies and morphotropic phase boundary to promote high piezoelectricity and temperature stability of PBZTN ceramics  

作　　者：Wenbin Liu Ting Zheng Xuezheng Ruan Zhenyong Man Haoyue Xue Laiming Jiang Fuping Zhang Guorong Li Jiagang Wu 

机构地区：[1]Department of Materials Science,Sichuan University,Chengdu 610065,China [2]Shanghai Institute of Ceramics,Chinese Academy of Sciences,Shanghai 201800,China [3]Institute of Fluid Physics,China Academy of Engineering Physics,Mianyang 621900,China

出　　处：《Journal of Materials Science & Technology》2023年第6期1-7,共7页材料科学技术（英文版）

基　　金：This work was financially supported by the National Natural Science Foundation of China(Nos.52002252 and 52032007).

摘　　要：The flourishing development of emerging electromechanical applications has stimulated an urgent demand for ferroelectric ceramics with high piezoelectric properties and broad temperature usage range.However,it remains a challenge to simultaneously obtain good piezoelectricity and reliable temperature stability in lead zirconate titanate(PZT)-based piezoelectric ceramics.To solve this issue,a synergetic strategy was proposed to introduce lead vacancies through niobium doping and construct morphotropic phase boundary(MPB).In this work,Pb_(0.905)Ba_(0.085)(V Pb″)_(0.01)[(Zr_(x)Ti_(1-x))_(0.98)Nb_(0.02)]O_(3)(PBZTN-x)material system was designed.Good comprehensive properties(d_(33)=864 pC/N,k_(p)=84%,T_(C)=201℃)and excellent temperature stability(less than 10%variation of electrical properties from 20℃ to 160℃)were obtained in PBZTN-0.540 ceramics.Good piezoelectricity can be attributed to high extrinsic contribution(domain wall motion)induced by Pb^(2+)vacancies and the existence of nano-domains emerged at MPB,while excellent temperature stability is mainly attributed to the minimized local stress in the lattice and the stable domain structure.

关 键 词：Piezoelectricity Lead VACANCIES Morphotropic phase boundary Temperature stability 

分 类 号：TM282[一般工业技术—材料科学与工程]