J. Mater. Sci. Technol. ›› 2024, Vol. 189: 37-43.DOI: 10.1016/j.jmst.2023.11.046

• Research Article • Previous Articles     Next Articles

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

Yongxing Weia,*, Junlong Yana, Siyuan Dongb, Changqing Jina, Huawei Zhanga, Lin Hub, Ruihua Nana, Ling Gaoa, Zhonghua Daic, Zengzhe Xia, Zengyun Jiana, Li Jind,*   

  1. aShaanxi Key Laboratory of Optoelectronic Functional Materials and Devices, School of Materials and Chemical Engineering, Xi'an Technological University, Xi'an 710021, China;
    bShaanxi Coal Chemical Industry Technology Research Institute Co. Ltd., Xi'an 710070, China;
    cShaanxi Province Key Laboratory of Thin Films Technology & Optical Test, Xi'an Technological University, Xi'an 710021, China;
    dElectronic 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
  • Received:2023-08-22 Revised:2023-11-07 Accepted:2023-11-11 Published:2024-08-01 Online:2024-01-11
  • Contact: *E-mail addresses: . weiyongxing@xatu.edu.cn , weiyx1985@gmail.com (Y. Wei), ljin@mail.xjtu.edu.cn (L. Jin)

Abstract: The heightened piezoelectric performance observed in most explored perovskite systems is typically attributed 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 incite 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 temperature. However, both the relative permittivity and planar electromechanical coupling coefficient experience a sharp rise in the temperature range of -25 °C to 25 °C. 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.

Key words: Phase boundary, Pseudocubic, Polarization extension, Local structure, Piezoelectric effect