Chauhan, Aditya ; Patel, Satyanarayan ; Wang, Shuai ; Novak, Nikola ; Xu, Bai-Xiang ; Lv, Peng ; Vaish, Rahul ; Lynch, Christopher S. (2017)
Enhanced performance of ferroelectric materials under hydrostatic pressure.
In: Journal of Applied Physics, 122 (22)
doi: 10.1063/1.5003775
Artikel, Bibliographie
Kurzbeschreibung (Abstract)
Mechanical confinement or restricted degrees of freedom have been explored for its potential to enhance the performance of ferroelectric devices. It presents an easy and reversible method to tune the response for specific applications. However, such studies have been mainly limited to uni- or biaxial stress. This study investigates the effect of hydrostatic pressure on the ferroelectric behavior of bulk polycrystalline Pb0.99Nb0.02(Zr0.95Ti0.05)0.98O3. Polarization versus electric field hysteresis plots were generated as a function of hydrostatic pressure for a range of operating temperatures (298–398 K). The application of hydrostatic pressure was observed to induce anti-ferroelectric like double hysteresis loops. This in turn enhances the piezoelectric, energy storage, energy harvesting, and electrocaloric effects. The hydrostatic piezoelectric coefficient (dh) was increased from 50pCN^-1 (0MPa) to ~900 pC N^-1 (265 MPa) and ~3200 pCN^-1 (330MPa) at 298K. Energy storage density was observed to improve by more than 4 times under pressure, in the whole temperature range. The relative change in entropy was also observed to shift from ~0 to 4.8 J kg^-1K^-1 under an applied pressure of 325MPa. This behavior can be attributed to the evolution of pinched hysteresis loops that have been explained using a phenomenological model. All values represent an improvementof several hundred percent compared to unbiased performance, indicating the potential benefits of the proposed methodology. Published by AIP Publishing
| Typ des Eintrags: | Artikel |
|---|---|
| Erschienen: | 2017 |
| Autor(en): | Chauhan, Aditya ; Patel, Satyanarayan ; Wang, Shuai ; Novak, Nikola ; Xu, Bai-Xiang ; Lv, Peng ; Vaish, Rahul ; Lynch, Christopher S. |
| Art des Eintrags: | Bibliographie |
| Titel: | Enhanced performance of ferroelectric materials under hydrostatic pressure |
| Sprache: | Englisch |
| Publikationsjahr: | 15 Dezember 2017 |
| Titel der Zeitschrift, Zeitung oder Schriftenreihe: | Journal of Applied Physics |
| Jahrgang/Volume einer Zeitschrift: | 122 |
| (Heft-)Nummer: | 22 |
| DOI: | 10.1063/1.5003775 |
| URL / URN: | https://doi.org/10.1063/1.5003775 |
| Kurzbeschreibung (Abstract): | Mechanical confinement or restricted degrees of freedom have been explored for its potential to enhance the performance of ferroelectric devices. It presents an easy and reversible method to tune the response for specific applications. However, such studies have been mainly limited to uni- or biaxial stress. This study investigates the effect of hydrostatic pressure on the ferroelectric behavior of bulk polycrystalline Pb0.99Nb0.02(Zr0.95Ti0.05)0.98O3. Polarization versus electric field hysteresis plots were generated as a function of hydrostatic pressure for a range of operating temperatures (298–398 K). The application of hydrostatic pressure was observed to induce anti-ferroelectric like double hysteresis loops. This in turn enhances the piezoelectric, energy storage, energy harvesting, and electrocaloric effects. The hydrostatic piezoelectric coefficient (dh) was increased from 50pCN^-1 (0MPa) to ~900 pC N^-1 (265 MPa) and ~3200 pCN^-1 (330MPa) at 298K. Energy storage density was observed to improve by more than 4 times under pressure, in the whole temperature range. The relative change in entropy was also observed to shift from ~0 to 4.8 J kg^-1K^-1 under an applied pressure of 325MPa. This behavior can be attributed to the evolution of pinched hysteresis loops that have been explained using a phenomenological model. All values represent an improvementof several hundred percent compared to unbiased performance, indicating the potential benefits of the proposed methodology. Published by AIP Publishing |
| Fachbereich(e)/-gebiet(e): | 11 Fachbereich Material- und Geowissenschaften 11 Fachbereich Material- und Geowissenschaften > Materialwissenschaft 11 Fachbereich Material- und Geowissenschaften > Materialwissenschaft > Fachgebiet Mechanik Funktionaler Materialien 11 Fachbereich Material- und Geowissenschaften > Materialwissenschaft > Fachgebiet Nichtmetallisch-Anorganische Werkstoffe |
| Hinterlegungsdatum: | 03 Jan 2018 08:01 |
| Letzte Änderung: | 26 Jan 2024 09:21 |
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