Outstanding electromechanical performance in piezoelectric ceramics via synergistic effects of defect engineering and domain miniaturization

作     者：Zhifei Zhang Liang Chen Huajie Luo Yueyun Zhang Yonghao Yao Guanfu Liu He Qi Jun Chen Zhifei Zhang;Liang Chen;Huajie Luo;Yueyun Zhang;Yonghao Yao;Guanfu Liu;He Qi;Jun Chen

作者机构：Beijing Advanced Innovation Center for Materials Genome EngineeringDepartment of Physical ChemistryUniversity of Science and Technology BeijingBeijing 100083China Hainan UniversityHaikou 570228China 

出 版 物：《Journal of Materials Science & Technology》 (材料科学技术（英文版）)

年 卷 期：2023年第158卷第27期

页      面：1-8页

核心收录：

学科分类：08[工学] 080501[工学-材料物理与化学] 0805[工学-材料科学与工程（可授工学、理学学位）] 0703[理学-化学] 

基　　金：financially supported by the National Natural Science Foundation of China(Nos.52172181 and22105017). 

主　　题：PNN-PZT ceramics Defect engineering Domain miniaturization High mechanical quality factor Q_(m) Large piezoelectric coefficient d_(33) 

摘      要：Piezoelectric ceramics with high mechanical quality factor Q_(m) and large piezoelectric coefficient d_(33) are urgently required for advanced piezoelectric applications.However,obtaining both of these prop-erties simultaneously remains a difficult challenge due to their mutually restrictive relationship.Here 0.5Pb(Ni_(1/3)Nb_(2/3))O_(3)-0.5Pb(Zr_(0.3)Ti_(0.7))O_(3) piezoceramic with tetragonal(T)-rich MPB is designed as a matrix to construct the defect engineering by doping low-valent Mn ions.The strong coupling of defect dipole and T-rich phase can effectively hinder the rotation of P_(s),restrict domain wall motion and improve Q_(m).At the same time,the substituted Mn ions will introduce local random field,destroying the long-range or-dering of ferroelectric domain and reducing domain size.The miniaturized domain structure can increase poling efficiency and inhibit the reduction of d_(33).Guided by this strategy,Q_(m) has increased by more than 10 times and d_(33) has only decreased by about 25%.The optimized electromechanical performance with Q_(m)=822,d_(33)=502 pC/N,k_(p)=0.55 and tanδ=0.0069 can be obtained in the present study.