Sirkanth, K. S. ; Patel, Satyanarayan ; Vaish, Rahul (2018)
Electrocaloric behavior and temperature dependent scaling of dynamic
hysteresis of BaxSr1-xTiO3 (x = 0.7, 0.8 and 0.9) bulk ceramics.
In: Journal of the Australian Ceramic Society, 54
doi: 10.1007/s41779-017-0170-3
Artikel, Bibliographie
Kurzbeschreibung (Abstract)
This article presents electrocaloric effect in BaxSr1-xTiO3 ferroelectric ceramics using an indirect approach based on Maxwell’s relations. The peak electrocaloric performance is found to be an adiabatic temperature change of 0.67, 0.83, and 0.61 K and isothermal entropy change of 0.9, 1, and 0.7 J/kg.K for x = 0.7, 0.8, and 0.9, respectively, under an electric field of 33 kV/cm. The electrocaloric coefficient of performance (COP) of materials were also estimated as 17, 5.47, and 5.68 when x = 0.7, 0.8, and 0.9, respectively, in BaxSr1-xTiO3 at 33 kV/cm (303 K). Further, the ferroelectric hysteresis parameters scaling relations of coercive field (Ec) and remnant polarization (Pr) as a function of temperature have been estimated. The back switching polarization (Pbc) as a function of temperature (T) was estimated by the Arrhenius law in order to understand the domain dynamics, and the average activation energy was evaluated.
| Typ des Eintrags: | Artikel |
|---|---|
| Erschienen: | 2018 |
| Autor(en): | Sirkanth, K. S. ; Patel, Satyanarayan ; Vaish, Rahul |
| Art des Eintrags: | Bibliographie |
| Titel: | Electrocaloric behavior and temperature dependent scaling of dynamic hysteresis of BaxSr1-xTiO3 (x = 0.7, 0.8 and 0.9) bulk ceramics |
| Sprache: | Englisch |
| Publikationsjahr: | 14 August 2018 |
| Titel der Zeitschrift, Zeitung oder Schriftenreihe: | Journal of the Australian Ceramic Society |
| Jahrgang/Volume einer Zeitschrift: | 54 |
| DOI: | 10.1007/s41779-017-0170-3 |
| Kurzbeschreibung (Abstract): | This article presents electrocaloric effect in BaxSr1-xTiO3 ferroelectric ceramics using an indirect approach based on Maxwell’s relations. The peak electrocaloric performance is found to be an adiabatic temperature change of 0.67, 0.83, and 0.61 K and isothermal entropy change of 0.9, 1, and 0.7 J/kg.K for x = 0.7, 0.8, and 0.9, respectively, under an electric field of 33 kV/cm. The electrocaloric coefficient of performance (COP) of materials were also estimated as 17, 5.47, and 5.68 when x = 0.7, 0.8, and 0.9, respectively, in BaxSr1-xTiO3 at 33 kV/cm (303 K). Further, the ferroelectric hysteresis parameters scaling relations of coercive field (Ec) and remnant polarization (Pr) as a function of temperature have been estimated. The back switching polarization (Pbc) as a function of temperature (T) was estimated by the Arrhenius law in order to understand the domain dynamics, and the average activation energy was evaluated. |
| Freie Schlagworte: | Electrocaloric Ferroelectric Ceramics Hysteresis scaling |
| Fachbereich(e)/-gebiet(e): | 11 Fachbereich Material- und Geowissenschaften 11 Fachbereich Material- und Geowissenschaften > Materialwissenschaft 11 Fachbereich Material- und Geowissenschaften > Materialwissenschaft > Fachgebiet Nichtmetallisch-Anorganische Werkstoffe |
| Hinterlegungsdatum: | 27 Aug 2018 09:01 |
| Letzte Änderung: | 31 Jan 2019 14:53 |
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