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Tailoring combined “soft” and “hard” piezoelectric properties in MnO2-doped (Ba,Ca)(Zr,Sn,Ti)O3 piezoceramics via N2 annealing

  • Guohui Wang
  • , Pengrong Ren*
  • , Xiangcheng Qi
  • , Kai Li
  • , Lang Bian
  • , Xin Wang
  • , Peng Zhang
  • , Chaowei Guo
  • , Fangping Zhuo
  • *Corresponding author for this work
  • Xi'an University of Technology
  • Huizhou University
  • Xi'an Technological University
  • Xi'an Jiaotong University
  • Technische Universität Darmstadt

Research output: Contribution to journalArticlepeer-review

Abstract

(Ba1-xCax) (Zr0.04Sn0.04Ti0.92)O3 (BCZST)-based piezoelectric ceramics were prepared using a solid-state reaction method. The refinement of microstructure significantly enhanced the piezoelectric properties of BCZST. BCZST doped with 2 mol% MnO2 exhibited an impressive mechanical quality factor (Qm) of approximately 1045, mainly attributed to the suppression of extrinsic domain switching contributions. However, the MnO2 doping also resulted in a reduction of the piezoelectric coefficient (d33) to 144 pC/N. Notably, annealing the BCZST + 2 mol% MnO2 in nitrogen led to the coexistence of multiple phases and increased the intrinsic contribution from polarization rotation. This treatment optimized both the hard and soft piezoelectric properties, yielding a Qm of 721 and a d33 of 220 pC/N. Our multiscale defect-engineering strategy presents a valuable approach for the design of lead-free piezoelectric ceramics with enhanced hardening effects suitable for high-power applications.

Original languageEnglish
Article number117363
JournalJournal of the European Ceramic Society
Volume45
Issue number10
DOIs
StatePublished - Aug 2025
Externally publishedYes

Keywords

  • Electromechanical properties
  • Grain size
  • N annealing
  • Piezoelectric ceramics

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