首页|Polarization extension yielding ultrahigh piezoelectric response in xPb(Nb2/3Ni1/3)O3-(1-x)Pb(Zr0.3Ti0.7)O3 ferroelectrics ceramics

Polarization extension yielding ultrahigh piezoelectric response in xPb(Nb2/3Ni1/3)O3-(1-x)Pb(Zr0.3Ti0.7)O3 ferroelectrics ceramics

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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(Nb2/3Ni1/3)O3-(1-x)Pb(Zr0.3Ti0.7)O3(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(d33)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.

Phase boundaryPseudocubicPolarization extensionLocal structurePiezoelectric effect

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

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Shaanxi Key Laboratory of Optoelectronic Functional Materials and Devices,School of Materials and Chemical Engineering,Xi'an Technological University,Xi'an 710021,China

Shaanxi Coal Chemical Industry Technology Research Institute Co.Ltd,Xi'an 710070,China

Shaanxi Province Key Laboratory of Thin Films Technology & Optical Test,Xi'an Technological University,Xi'an 710021,China

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

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National Natural Science Foundation of ChinaNatural Science Basic Research Plan in Shaanxi Province of China

117043012022JM212

2024

材料科学技术(英文版)
中国金属学会 中国材料研究学会 中国科学院金属研究所

材料科学技术(英文版)

CSTPCD
影响因子:0.657
ISSN:1005-0302
年,卷(期):2024.189(22)