Optimizing piezoelectric performance of complex perovskite through increasing diversity of B-site cations  

作　　者：Mengdi Cheng Dongyan Zhang Yangxi Yan Zhimin Li Pangpang Wang Ri-ichi Murakami 

机构地区：[1]School of Advanced Materials and Nanotechnology,Xidian University,Xi’an 710126,China [2]Nanomaterials Group,Institute of System,Information Technologies and Nanotechnologies(ISIT),Fukuoka Industry-Academia Symphonicity(FiaS),4-1 Kyudaishinmachi,Nishi-ku,Fukuoka 819-0388,Japan [3]School of Mechanical Engineering,Chengdu University,Chengdu 610106,China

出　　处：《Journal of Materials Science & Technology》2024年第3期78-86,共9页材料科学技术（英文版）

基　　金：supported by the National Natural Science Foundation of China(No.52173227);the Key Research and Development Program of Shaanxi(No.2022GY-184);the Innovation Fund of Xidian University,and the Fundamental Research Funds for the Central Universities(No.ZYTS23083).

摘　　要：Piezoelectric materials with unique properties are hugely appealing for high sensitivity sensors and ultrasonic transducers.Here,Pb(Ni_(1/3)Nb_(2/3))O_(3)-Pb(Yb_(1/2)Nb_(1/2))O_(3)-PbTiO_(3)piezoelectric system was designed and investigated in detail.The optimized piezoelectric response(d_(33)=826 pC/N,d_(33)∗=1017 pm/V)together with good temperature stability and negligible performance degradation up to 10^(6) cycles was achieved in 0.58PNN-0.10PYN-0.32PT composition.Rayleigh analysis revealed the amplification of intrinsic and extrinsic contributions in MPB region due to more spontaneous polarization orientations and an increase in chemical disorder of system after the introduction of PYN.The origin of high piezoelectric response was investigated through the combination of scanning electron microscopy and piezoresponse force microscopy.The diversity of B-site cations was shown to enhance local structural heterogeneity,weaken long-range ferroelectric ordered domains,and lower free energy barrier via the formation of nanodomain configuration that promoted polarization rotation,thereby improving piezoelectric properties of the material.Therefore,it is suggested that increasing the diversity of B-site cations is an effective strategy for achieving outstanding piezoelectric performance.

关 键 词：PNN-PYN-PT ceramics Piezoelectricity enhancement Relaxation behavior Domain structure 

分 类 号：O62[理学—有机化学]