University of Oulu

Molin C, Peräntie J, Le Goupil F, et al. Comparison of direct electrocaloric characterization methods exemplified by 0.92 Pb(Mg1/3Nb2/3)O3-0.08 PbTiO3 multilayer ceramics. J Am Ceram Soc. 2017;100:2885–2892. https://doi/org/10.1111/jace.14805

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

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Author: Molin, Christian1; Peräntie, Jani2; Le Goupil, Florian3;
Organizations: 1Department of Smart Materials and Systems, Fraunhofer Institute for Ceramic Technologies and Systems IKTS, Dresden, Germany
2Microelectronics Research Unit, University of Oulu, Oulu, Finland
3Department of Materials, Imperial College London, London, UK
4Institute of Materials Science, Technische Universit€at Darmstadt, Darmstadt, Germany
5Institute for Materials Science and Center for Nanointegration Duisburg- Essen (CENIDE), University of Duisburg-Essen, Essen, Germany
Format: article
Version: accepted version
Access: embargoed
Persistent link: http://urn.fi/urn:nbn:fi-fe201708158120
Language: English
Published: John Wiley & Sons, 2017
Publish Date: 2018-03-30
Description:

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 μm and 39 μm. 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 ΔT = 2.67 K under application/withdrawal of an electric field of ΔE = 16 kV mm⁻¹, which corresponds to operation voltages below 1.5 kV.

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Series: Journal of the American Ceramic Society
ISSN: 0002-7820
ISSN-E: 1551-2916
ISSN-L: 0002-7820
Volume: 100
Issue: 7
Pages: 2885 - 2892
Type of Publication: A1 Journal article – refereed
Field of Science: 114 Physical sciences
213 Electronic, automation and communications engineering, electronics
216 Materials engineering
Subjects:
Funding: This work was partly supported by the German Research Foundation (DFG) in context of the priority program Ferroic Cooling (SPP1599).
Copyright information: © 2017 The American Ceramic Society.