Le Goupil, F, Bennett, J, Axelsson, A-K et al. (5 more authors) (2015) Electrocaloric enhancement near the morphotropic phase boundary in lead-free NBT-KBT ceramics. Applied Physics Letters, 107 (17). ARTN 172903. ISSN 0003-6951
Abstract
The electrocaloric effects (ECEs) of the morphotropic phase boundary (MPB) composition 0.82(Na0.5Bi0.5)TiO3-0.18(K0.5Bi0.5)TiO3 (NBT-18KBT) are studied by direct measurements. The maximum ECE DTmax¼0.73K is measured at 160 C under 22 kV/cm. This corresponds to an ECE responsivity (DT/DE) of 0.33 10 6 K m/V, which is comparable with the best reported values for lead-free ceramics. A comparison between the direct and indirect ECE measurements shows significant discrepancies. The direct measurement of both positive and negative electrocaloric effect confirms the presence of numerous polar phases near the MPB of NBT-based materials and highlights their potential for solid-state cooling based on high field-induced entropy changes.
Metadata
Item Type: | Article |
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Authors/Creators: |
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Copyright, Publisher and Additional Information: | © 2015 AIP Publishing LLC. This article may be downloaded for personal use only. Any other use requires prior permission of the author and the American Institute of Physics. The following article appeared in Le Goupil, F, Bennett, J, Axelsson, A-K, Valant, M, Berenov, A, Bell, AJ, Comyn, TP and Alford, NM (2015) Electrocaloric enhancement near the morphotropic phase boundary in lead-free NBT-KBT ceramics. Applied Physics Letters, 107 (17). ARTN 172903, and may be found at http://dx.doi.org/10.1063/1.4934759. Reproduced in accordance with the publisher's self-archiving policy. |
Dates: |
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Institution: | The University of Leeds |
Academic Units: | The University of Leeds > Faculty of Engineering & Physical Sciences (Leeds) > School of Chemical & Process Engineering (Leeds) > Institute for Materials Research (Leeds) |
Depositing User: | Symplectic Publications |
Date Deposited: | 27 Nov 2015 10:46 |
Last Modified: | 27 Nov 2015 10:46 |
Published Version: | http://dx.doi.org/10.1063/1.4934759 |
Status: | Published |
Publisher: | American Institute of Physics (AIP) |
Identification Number: | 10.1063/1.4934759 |
Related URLs: | |
Open Archives Initiative ID (OAI ID): | oai:eprints.whiterose.ac.uk:92292 |