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Comparison of direct electrocaloric characterization methods exemplified by 0.92 Pb(Mg1/3Nb2/3)O3-0.08 PbTiO3 multilayer ceramics

Molin, Christian ; Peräntie, Jani ; Weyland, Florian ; Sanlialp, Mehmet ; Stingelin, Natalie ; Novak, Nikola ; Lupascu, Doru C. ; Gebhardt, Sylvia :
Comparison of direct electrocaloric characterization methods exemplified by 0.92 Pb(Mg1/3Nb2/3)O3-0.08 PbTiO3 multilayer ceramics.
In: Journal of the American Ceramic Society, 100 (7) pp. 2885-2892. ISSN 0002-7820
[Artikel], (2017)

Kurzbeschreibung (Abstract)

Electrocaloric device structures have been developed as multilayer ceramics(MLCs) based on fundamental research carried out on PMN-8PT bulk ceramics. Two different MLC structures were prepared with nine layers each and layer thicknesses of 86 lm and 39 lm. The influence of the device design on its properties has been characterized by microstructural, dielectric, ferroelectric, and direct electrocaloric measurement. For direct characterization two different methods, ie temperature reading (thermistor and thermocouple) and heat flow measurement (differential scanning calorimetry), were used. A comparison of results revealed a highly satisfactory agreement between the different methods. This study confirms that MLCs are promising candidates for implementation into energy-efficient electrocaloric cooling systems providing large refrigerant volume and high electrocaloric effect. Due to their micron-sized active layers, they allow for the application of high electric fields under low operation voltages. We measured a maximum electrocaloric temperature change of DT=2.67 K under application/ withdrawal of an electric field of DE=16 kV mm^-1, which corresponds to operation voltages below 1.5 kV.

Typ des Eintrags: Artikel
Erschienen: 2017
Autor(en): Molin, Christian ; Peräntie, Jani ; Weyland, Florian ; Sanlialp, Mehmet ; Stingelin, Natalie ; Novak, Nikola ; Lupascu, Doru C. ; Gebhardt, Sylvia
Titel: Comparison of direct electrocaloric characterization methods exemplified by 0.92 Pb(Mg1/3Nb2/3)O3-0.08 PbTiO3 multilayer ceramics
Sprache: Englisch
Kurzbeschreibung (Abstract):

Electrocaloric device structures have been developed as multilayer ceramics(MLCs) based on fundamental research carried out on PMN-8PT bulk ceramics. Two different MLC structures were prepared with nine layers each and layer thicknesses of 86 lm and 39 lm. The influence of the device design on its properties has been characterized by microstructural, dielectric, ferroelectric, and direct electrocaloric measurement. For direct characterization two different methods, ie temperature reading (thermistor and thermocouple) and heat flow measurement (differential scanning calorimetry), were used. A comparison of results revealed a highly satisfactory agreement between the different methods. This study confirms that MLCs are promising candidates for implementation into energy-efficient electrocaloric cooling systems providing large refrigerant volume and high electrocaloric effect. Due to their micron-sized active layers, they allow for the application of high electric fields under low operation voltages. We measured a maximum electrocaloric temperature change of DT=2.67 K under application/ withdrawal of an electric field of DE=16 kV mm^-1, which corresponds to operation voltages below 1.5 kV.

Titel der Zeitschrift, Zeitung oder Schriftenreihe: Journal of the American Ceramic Society
Band: 100
(Heft-)Nummer: 7
Freie Schlagworte: dielectric, electrocaloric effect, ferroelectricity/ferroelectric materials, materials/properties, multilayers
Fachbereich(e)/-gebiet(e): 11 Fachbereich Material- und Geowissenschaften > Materialwissenschaft
11 Fachbereich Material- und Geowissenschaften > Materialwissenschaft > Fachgebiet Nichtmetallisch-Anorganische Werkstoffe
11 Fachbereich Material- und Geowissenschaften
Hinterlegungsdatum: 05 Jul 2017 05:41
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