Concurrently enhanced piezoelectric performance and curie temperature in stressed lead-free Ba<sub>0.85</sub>Ca<sub>0.15</sub>Ti<sub>0.9</sub>Zr<sub>0.1</sub>O<sub>3</sub> ceramics.
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ABSTRACT: Eco-friendly, lead-free BaTiO3-based piezoelectrics are critical for sustainable electronics, but improving their piezoelectric properties often compromises Curie temperature (TC). To address this trade-off, we implemented an innovative stress engineering approach by introducing a secondary phase BaAl2O4 in Ba0.85Ca0.15Ti0.9Zr0.1O3 (BCTZ) ceramics. The thermal expansion mismatch between BCTZ and BaAl2O4 induces internal stress within the BCTZ matrix, causing significant lattice distortion and phase fraction modulation, which improves both TC and the piezoelectric coefficient (d33). Additionally, the local electric field and Al3+ doping in
SUBMITTER: Su Y
PROVIDER: S-EPMC12043952 | biostudies-literature | 2025 Apr
REPOSITORIES: biostudies-literature
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