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- Title
Selectively designed Fe doping of lead-free BaTiO<sub>3</sub> piezoceramics.
- Authors
Zhang, Ning; Yao, Zhonghua; Hao, Hua; Cao, Minghe; Liu, Hanxing
- Abstract
Fe doping has been investigated to determine the effect of defects on the piezoelectric properties of BaTiO3 ceramics. Fe doping can produce oxygen vacancies due to ionic replacement, and then a defect dipole ( Fe Ti ′ - V O · · ) is formed. This acceptor characteristic typically induces a reduced piezoelectric constant but improves the thermal stability and fatigue behavior. A thermally stimulated depolarization current (TSDC) is employed to distinguish the role of defect dipoles from oxygen vacancies and characterize the reasons for fatigue behavior and thermal stability. TSDC of the pure BaTiO3 ceramic shows one peak, whereas Fe-doped ceramic shows two peaks. The first and second peaks are presumably ascribed to defect dipole and space charge polarization, respectively. This study provides an effective method to extensively investigate the effect of defect configuration on ferroelectric–piezoelectric behavior.
- Subjects
THERMAL fatigue; SPACE charge; PIEZOELECTRICITY; THERMAL stability
- Publication
Journal of Materials Science: Materials in Electronics, 2022, Vol 33, Issue 13, p10154
- ISSN
0957-4522
- Publication type
Article
- DOI
10.1007/s10854-022-08005-2