Tuning the electrocaloric enhancement near the morphotropic phase boundary in lead-free ceramics

Journal article


Le Goupil, F, McKinnon, R, Koval, V, Viola, G, Dunn, S, Berenov, A, Yan, H and Alford, N (2016). Tuning the electrocaloric enhancement near the morphotropic phase boundary in lead-free ceramics. Scientific Reports. 6, p. 28251.
AuthorsLe Goupil, F, McKinnon, R, Koval, V, Viola, G, Dunn, S, Berenov, A, Yan, H and Alford, N
Abstract

The need for more energy-efficient and environmentally-friendly alternatives in the refrigeration industry to meet global emission targets has driven efforts towards materials with a potential for solid state cooling. Adiabatic depolarisation cooling, based on the electrocaloric effect (ECE), is a significant contender for efficient new solid state refrigeration techniques. Some of the highest ECE performances reported are found in compounds close to the morphotropic phase boundary (MPB). This relationship between performance and the MPB makes the ability to tune the position of the MPB an important challenge in electrocaloric research. Here, we report direct ECE measurements performed on MPB tuned NBT-06BT bulk ceramics with a combination of A-site substitutions. We successfully shift the MPB of these lead-free ceramics closer to room temperature, as required for solid state refrigeration, without loss of the criticality of the system and the associated ECE enhancement.

Year2016
JournalScientific Reports
Journal citation6, p. 28251
PublisherNature Publishing Group
Digital Object Identifier (DOI)doi:10.1038/srep28251
Publication dates
Print17 Jun 2016
Publication process dates
Deposited10 Jan 2019
Accepted01 Jun 2016
Publisher's version
License
CC BY 4.0
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https://openresearch.lsbu.ac.uk/item/873v2

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