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Enhanced electric-field induced strain in Eu3+doped 0.67BiFeO3-0.33BaTiO3lead-free piezoelectric ceramics
- Source :
- Journal of Rare Earths; September 2024, Vol. 42 Issue: 9 p1747-1754, 8p
- Publication Year :
- 2024
-
Abstract
- Lead-free ferroelectric ceramics, 0.67Bi1–xEuxFeO3-0.33BaTiO3(BF-BT-xEu, x = 0–0.02), were prepared via a solid-state reaction. The effect of Eu3+doping on the microstructure, dielectric properties, ferroelectric properties, and electric-field-induced strain was investigated. The X-ray diffraction (XRD) results indicate the presence of a mixed phase of tetragonal and rhombohedral at the morphotropic phase boundary (MPB). Doping with an appropriate amount of Eu3+reduces the Fe2+content and decreases the leakage current in the binary system. A converse piezoelectric coefficient (d33∗) of 392 pm/V is obtained at BF-BT-0.003Eu under an electric field of 60 kV/cm at room temperature, which has a Curie temperature (TC) of 414 °C. The unipolar strain and d33∗of BF-BT-0.003Eu ceramics increase to 0.438% and 730 pm/V at 125 °C. The field-induced strain response of the BF-BT-0.003Eu ceramics is greater than that of 0.67BF-0.33BT, mainly due to its optimal grain size, reduction of leakage current, and coexistence of ferroelectric-relaxation phases. BF-BT-0.003Eu ceramic is a lead-free candidate for high-temperature actuator applications.
Details
- Language :
- English
- ISSN :
- 10020721
- Volume :
- 42
- Issue :
- 9
- Database :
- Supplemental Index
- Journal :
- Journal of Rare Earths
- Publication Type :
- Periodical
- Accession number :
- ejs63735594
- Full Text :
- https://doi.org/10.1016/j.jre.2023.08.001