Enhanced piezoelectric properties and thermal stability of LiNbO_(3)-modified PNN-PZT ceramics  

作　　者：Wei Peng Jianglei Chang Jianwei Zhao Dawei Wang Zhen Liu Genshui Wang Shuxiang Dong 

机构地区：[1]Institute for Advanced Study,Shenzhen University,Shenzhen,518060,China [2]Shenzhen Institute of Advanced Electronic Materials,Shenzhen Institute of Advanced Technology,Chinese Academy of Sciences,Shenzhen,518055,China [3]School of Instrumentation Science and Engineering,Harbin Institute of Technology,Harbin,150080,China [4]Key Laboratory of Inorganic Functional Materials and Devices,Shanghai Institute of Ceramics,Chinese Academy of Sciences,Shanghai,201899,China

出　　处：《Journal of Materiomics》2024年第5期995-1003,共9页无机材料学学报（英文）

基　　金：This work was supported by Key Research and Development Program of Ministry of Science and Technology of China(No.2022YFB3204000).

摘　　要：Piezoelectric PZT ceramics with high piezoelectric properties and good thermal stability are urgently desired concerning the practical application.New compositions of LiNbO_(3) modified Pb(Ni_(1/3)Nb_(2/3))O_(3)single bondPbZrO_(3)single bondPbTiO_(3) ceramics have been prepared in this study.The effects of the introduction of the LiNbO_(3) on the system were comprehensively investigated in terms of the phase structure,microstructure,electric properties,and thermal stability behavior of the ceramics.All compositions are located in the morphotropic phase boundary(MPB)region,and the ratio of the rhombohedral(R)phase increases obviously with the increase of LiNbO_(3) concentration.With increasing the LiNbO_(3) content,the piezoelectric properties were significantly enhanced.The sample added with 2%(in mole)LiNbO_(3) shows excellent electric properties,including T_(m)=185℃,εr=5,643,k_(p)=0.626,Q_(m)=51,d_(33)=902 pC/N.More importantly,no thermal depolarization behavior was observed in the temperature range of 25–100℃.For PNN-PZT-x%LN ceramics,which is mainly attributed to the pinning effect resulted by the(Li_(Pb)-Nb_(Zr/Ti)) defect dipoles.

关 键 词：PNN-PZT LiNbO_(3) Piezoelectric property Defect dipole Thermal stability 

分 类 号：TQ174.1[化学工程—陶瓷工业]