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| Naji, M. |
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| Motta, Antonella |
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| Aletan, Dirar |
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| Mohamed, Tarek |
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| Ertürk, Emre |
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| Taccardi, Nicola |
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| Kononenko, Denys |
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| Petrov, R. H. | Madrid |
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| Alshaaer, Mazen | Brussels |
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| Bih, L. |
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| Casati, R. |
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| Muller, Hermance |
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| Kočí, Jan | Prague |
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| Šuljagić, Marija |
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| Kalteremidou, Kalliopi-Artemi | Brussels |
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| Azam, Siraj |
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| Ospanova, Alyiya |
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| Blanpain, Bart |
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| Ali, M. A. |
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| Popa, V. |
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| Rančić, M. |
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| Ollier, Nadège |
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| Azevedo, Nuno Monteiro |
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| Landes, Michael |
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| Rignanese, Gian-Marco |
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Roscow, James
in Cooperation with on an Cooperation-Score of 37%
Topics
Publications (18/18 displayed)
- 2024Porous Structure Enhances the Longitudinal Piezoelectric Coefficient and Electromechanical Coupling Coefficient of Lead-Free (Ba0.85Ca0.15)(Zr0.1Ti0.9)O3citations
- 2024Porous structure enhances the longitudinal piezoelectric coefficient and electromechanical coupling coefficient of lead‐free (Ba 0.85 Ca 0.15 )(Zr 0.1 Ti 0.9 )O 3citations
- 2024Temperature-Dependent Ferroelectric Properties and Aging Behavior of Freeze-Cast Bismuth Ferrite-Barium Titanate Ceramicscitations
- 2024Ferroelectric-enhanced batteries for rapid charging and improved long-term performancecitations
- 2024Temperature-Dependent Ferroelectric Properties and Aging Behavior of Freeze-Cast Bismuth Ferrite–Barium Titanate Ceramicscitations
- 2024Exploring Lead-Free Materials for Screen-Printed Piezoelectric Wearable Devicescitations
- 2023The unusual case of plastic deformation and high dislocation densities with the cold sintering of the piezoelectric ceramic K0.5Na0.5NbO3citations
- 2022Twelve modified figures of merit of 2–2-type composites based on relaxor-ferroelectric single crystalscitations
- 2022Innovative piezo-active composites and their structure - Property relationshipscitations
- 2022Residual stress and domain switching in freeze cast porous barium titanatecitations
- 2022Ultrasonic Transducers made from Freeze-Cast Porous Piezoceramicscitations
- 2019Orienting anisometric pores in ferroelectrics:Piezoelectric property engineering through local electric field distributionscitations
- 2019Modified energy harvesting figures of merit for stress- and strain-driven piezoelectric systemscitations
- 2018Freeze cast porous barium titanate for enhanced piezoelectric energy harvestingcitations
- 2018Corrigendum to “Modelling and fabrication of porous sandwich layer barium titanate with improved piezoelectric energy harvesting figures of merit” [Acta Mater. 128 (2017) 207–217](S1359645417301209)(10.1016/j.actamat.2017.02.029)citations
- 2018Understanding the effect of porosity on the polarisation-field response of ferroelectric materialscitations
- 2017Modelling and fabrication of porous sandwich layer barium titanate with improved piezoelectric energy harvesting figures of meritcitations
- 2016Manufacture and characterization of porous ferroelectrics for piezoelectric energy harvesting applicationscitations
Places of action
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article
Temperature-Dependent Ferroelectric Properties and Aging Behavior of Freeze-Cast Bismuth Ferrite-Barium Titanate Ceramics
Abstract
Lead-free BiFeO<sub>3</sub>–BaTiO<sub>3</sub> (BF-BT) piezoceramics have sparked considerable interest in recent years due to their high piezoelectric performance and high Curie temperature. In this paper, we show how the addition of highly aligned porosity (between 40 and 60 vol %) improves the piezoelectric performance, sensing, and energy harvesting figures of merit in freeze-cast 0.70BiFeO<sub>3</sub>–0.30BaTiO<sub>3</sub> piezoceramics compared to conventionally processed, nominally dense samples of the same composition. The dense and porous BF-BT ceramics had similar longitudinal piezoelectric coefficients (<i>d</i><sub>33</sub>) immediately after poling, yet the dense samples were observed to age faster than those of porous ceramics. After 24 h, for example, the porous samples had significantly higher <i>d</i><sub>33</sub> values ranging from 112 to 124 pC/N, compared to 85 pC/N for the dense samples. Porous samples exhibited 3 and 5 times higher longitudinal piezoelectric voltage coefficient <i>g</i><sub>33</sub> and energy harvesting figure of merit <i>d</i><sub>33</sub><i>g</i><sub>33</sub> than dense samples due to the unexpected increase in <i>d</i><sub>33</sub> and decrease in relative permittivity with porosity. Spontaneous polarization (Ps) and remnant polarization (Pr) decrease as the porosity content increased from 37 to 59 vol %, as expected due to the lower volume of active material; however, normalized polarization values with respect to porosity level showed a slight increase in the porous materials relative to the dense BF-BT. Furthermore, the porous ceramics showed improved temperature-dependent strain–field response compared to the dense. As a result, these porous materials show excellent potential for use in high temperature sensing and harvesting applications.