Polarization extension yielding ultrahigh piezoelectric response in xPb(Nb_(2/3)Ni_(1/3))O_(3)-(1-x)Pb(Zr_(0.3)Ti_(0.7))O_(3)ferroelectrics ceramics  

作　　者：Yongxing Wei Junlong Yan Siyuan Dong Changqing Jin Huawei Zhang Lin Hu Ruihua Nan Ling Gao Zhonghua Dai Zengzhe Xi Zengyun Jian Li Jin 

机构地区：[1]Shaanxi Key Laboratory of Optoelectronic Functional Materials and Devices,School of Materials and Chemical Engineering,Xi’an Technological University,Xi’an 710021,China [2]Shaanxi Coal Chemical Industry Technology Research Institute Co.Ltd.,Xi’an 710070,China [3]Shaanxi Province Key Laboratory of Thin Films Technology&Optical Test,Xi’an Technological University,Xi’an 710021,China [4]Electronic Materials Research Laboratory,Key Laboratory of the Ministry of Education,School of Electronic Science and Engineering,Faculty of Electronic and Information Engineering,Xi’an Jiaotong University,Xi’an 710049,China

出　　处：《Journal of Materials Science & Technology》2024年第22期37-43,共7页材料科学技术（英文版）

基　　金：financially supported by the National Natu-ral Science Foundation of China(Project No.11704301);the Natural Science Basic Research Plan in Shaanxi Province of China(Program No.2022JM212).

摘　　要：The heightened piezoelectric performance observed in most explored perovskite systems is typically at-tributed to the electric-field-induced phase transition near the morphotropic phase boundary(MPB)or polymorphic phase boundary(PPB).This study,however,unveils a distinct piezoelectric enhancement mechanism in the xPb(Nb_(2/3)Ni_(1/3))O_(3)-(1-x)Pb(Zr_(0.3)Ti_(0.7))O_(3)(PNN-PZT)system,diverging from the MPB/PPB-centered piezoelectric systems.Notably,the composition with x=0.55,positioned close to the tetragonal-pseudocubic(T-PC)phase boundary,achieves an unprecedented piezoelectric coefficient(d_(33))of 1264 pC/N,while retaining a tetragonal local structure.Importantly,on a local scale,electric fields do not in-cite phase transitions,suggesting that the exceptional piezoelectric performance in PNN-PZT stems from polarization extension near the T-PC boundary.Distinct from other mechanisms,the relative permittivity significantly increases post-poling due to this particular enhancement process.The dielectric behavior in poled specimens does not exhibit a conspicuous change at the ferroelectric-relaxor transition tempera-ture.However,both the relative permittivity and planar electromechanical coupling coefficient experience a sharp rise in the temperature range of−25℃to 25℃.This investigation underscores the pivotal role of designing compositionally-driven T-PC phase boundaries,presenting a promising avenue for enhancing piezoelectric properties in ferroelectric ceramics.

关 键 词：Phase boundary Pseudocubic Polarization extension Local structure Piezoelectric effect 

分 类 号：TM914.4[电气工程—电力电子与电力传动] TQ174.75[化学工程—陶瓷工业]