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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 and Peräntie, Jani and Weyland, Florian and Sanlialp, Mehmet and Stingelin, Natalie and Novak, Nikola and Lupascu, Doru C. and Gebhardt, Sylvia (2017):
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, pp. 2885-2892, 100, (7), ISSN 0002-7820, DOI: 10.1111/jace.14805, [Article]

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.

Item Type: Article
Erschienen: 2017
Creators: Molin, Christian and Peräntie, Jani and Weyland, Florian and Sanlialp, Mehmet and Stingelin, Natalie and Novak, Nikola and Lupascu, Doru C. and Gebhardt, Sylvia
Title: Comparison of direct electrocaloric characterization methods exemplified by 0.92 Pb(Mg1/3Nb2/3)O3-0.08 PbTiO3 multilayer ceramics
Language: English
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.

Journal or Publication Title: Journal of the American Ceramic Society
Volume: 100
Number: 7
Uncontrolled Keywords: dielectric, electrocaloric effect, ferroelectricity/ferroelectric materials, materials/properties, multilayers
Divisions: 11 Department of Materials and Earth Sciences > Material Science
11 Department of Materials and Earth Sciences > Material Science > Nonmetallic-Inorganic Materials
11 Department of Materials and Earth Sciences
Date Deposited: 05 Jul 2017 05:41
DOI: 10.1111/jace.14805
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