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- Title
Metal Particle Composite Hardening in Ba<sub>0.85</sub>C<sub>a0.15</sub>Ti<sub>0.90</sub>Zr<sub>0.10</sub>O<sub>3</sub> Piezoceramics.
- Authors
Zheng, Mupeng; Zhao, Changhao; Yan, Xiaodong; Khachaturyan, Ruben; Zhuo, Fangping; Hou, Yudong; Koruza, Jurij
- Abstract
Hard‐type piezoceramics are key materials in high‐power transducers and transformers. Acceptor doping is the most widely used piezoelectric hardening approach, but the mobility of oxygen vacancies at large electric fields or at high temperatures inevitably leads to the deterioration of hardening performance. The present study proposes a new hardening method associated with intragranular metal particles for achieving strong pinning of ferroelectric domain walls. Highly effective piezoelectric hardening via intragranular Ag particles in Ba0.85Ca0.15Ti0.90Zr0.10O3 ceramic is realized, where the mechanical quality factor Qm and the coercive field Ec increase by 170% and 53%, respectively. The Ba0.85Ca0.15Ti0.90Zr0.10O3/0.10Ag sample features a larger high‐power mechanical quality factor than the pure Ba0.85Ca0.15Ti0.90Zr0.10O3. Moreover, the piezoelectric properties (d31 and k31) of the Ba0.85Ca0.15Ti0.90Zr0.10O3/0.10Ag sample show exceptional stability with the increase in vibration velocity. This composite approach of introducing metal particles can be considered as a generic hardening method and can be extended to other ferroelectric systems.
- Subjects
METALLIC composites; PIEZOELECTRIC ceramics; QUALITY factor; ELECTRIC fields; HIGH temperatures; TITANIUM composites
- Publication
Advanced Functional Materials, 2023, Vol 33, Issue 38, p1
- ISSN
1616-301X
- Publication type
Article
- DOI
10.1002/adfm.202301356