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- Title
Improvement of fatigue endurance through modulating strain response in BaTiO<sub>3</sub>–Ca<sub>3</sub>Ti<sub>2</sub>O<sub>7</sub> composite ceramics.
- Authors
Xiao, Tianqi; Xiao, Zhifeng; Wang, Shouyu; Li, Zhiyan; Tian, Xiaoyu; Liu, Weifang
- Abstract
Ferroelectric ceramics are highly desired for applications in energy storage devices due to their fast charge-discharge capability. However, electric field-driven gradual degradation of ferroelectric polarization (i.e., fatigue) inevitably results in a decrease in energy efficiency and energy storage density. Therefore, improving fatigue endurance is one challenge for their practical applications in energy storage devices. Here, we provide a strategy to modulate the strain response to the external electric field, and thus, increase the fatigue endurance by employing hybrid improper ferroelectricc Ca3Ti2O7 ceramic that exhibits a negative piezoelectric effect. We synthesized (1 − x) BaTiO 3 − x Ca3Ti2O7 (BT-xCT) ceramics, in which the strain response of ceramics to the electric field gradually decreases with the increasing proportion of Ca3Ti2O7. For BT-0.3CT ceramic, the energy density storage efficiency is improved to 74.95% which is much higher than that of BT-0.1CT (48.07%). The strain response to the external electric field of BT-0.3CT is substantially lowered and almost reaches zero, leading to excellent fatigue endurance ability. This research work paves a route for designing ferroelectric ceramics with smaller strain response and enhanced fatigue endurance ability, which is expected to benefit a wide range of applications of ferroelectric ceramics in various electric capacitors and electric storage devices.
- Subjects
MATERIAL fatigue; FERROELECTRIC ceramics; PIEZOELECTRICITY; CAPACITORS; ENERGY storage
- Publication
International Journal of Modern Physics B: Condensed Matter Physics; Statistical Physics; Applied Physics, 2024, Vol 38, Issue 20, p1
- ISSN
0217-9792
- Publication type
Article
- DOI
10.1142/S0217979224502692