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 language | English |
|---|---|
| Article number | 117363 |
| Journal | Journal of the European Ceramic Society |
| Volume | 45 |
| Issue number | 10 |
| DOIs | |
| State | Published - Aug 2025 |
| Externally published | Yes |
Keywords
- Electromechanical properties
- Grain size
- N annealing
- Piezoelectric ceramics
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