J. Mater. Sci. Technol. ›› 2024, Vol. 169: 172-181.DOI: 10.1016/j.jmst.2023.05.063

• Research Article • Previous Articles     Next Articles

Superior piezoelectric performance with high operating temperature in bismuth ferrite-based ternary ceramics

Yunyao Huanga, Leiyang Zhanga, Ruiyi Jinga, Yang Yangb, Vladimir Shurc, Xiaoyong Weia, Li Jina,*   

  1. aElectronic Materials Research Laboratory, Key Laboratory of the Ministry of Education, School of Electronic Science and Engineering, Xi'an Jiaotong University, Xi'an 710049, China;
    bFaculty of Materials and Manufacturing, Key Laboratory of Advanced Functional Materials, Education Ministry of China, Beijing University of Technology, Beijing 100124, China;
    cSchool of Natural Sciences and Mathematics, Ural Federal University, Ekaterinburg, 620000, Russia
  • Received:2023-04-28 Revised:2023-05-28 Accepted:2023-05-28 Published:2024-01-10 Online:2023-07-12
  • Contact: * E-mail address: ljin@mail.xjtu.edu.cn (L. Jin).

Abstract: Due to the thermal depolarization effect, adequate piezoelectric performance with high operating temperature is regarded to be challenging to accomplish concurrently in piezoceramics for applications in specific piezoelectric devices. In this work, we synthesized (0.8-x)BiFeO3-xPbTiO3-0.2Ba(Zr0.25Ti0.75)O3 (abbreviated as BFO-xPT-BZT) ternary solid solutions with 0.15 ≤ x ≤ 0.30 by conventional solid-state reaction method. The MPB composition with a coexisting state of rhombohedral-tetragonal phases exhibits enhanced electromechanical properties, including Curie temperature of 380 °C, large-signal equivalent piezoelectric coefficient $d_{33}^{*}$ of 395 pm V-1, small-signal piezoelectric coefficient d33 of 302 pC N-1, and electromechanical coupling factor kp of 50.2%, which is comparable to commercial PZT-5A ceramics, indicating potential in high-temperature applications. Furthermore, in-situ X-ray diffraction (XRD) and piezoelectric force microscopic (PFM) techniques demonstrate that multiphase coexistence and complex nanodomains promote piezoelectric response via synergism. The x = 0.24 composition exhibits the highest in-situ d33 of 577 pC N-1 and good temperature stability in 30-280 °C, indicating that BZT-modified BFO-PT ceramics are promising candidates for high-temperature piezoelectric devices.

Key words: High-temperature piezoelectrics, Morphotropic phase boundary, In-situ technique, Domain structure, BFO