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Electrocaloric behavior and temperature dependent scaling of dynamic hysteresis of BaxSr1-xTiO3 (x = 0.7, 0.8 and 0.9) bulk ceramics

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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