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Direct measurement of electrocaloric effect in lead-free Ba(SnxTi1-x)O3 ceramics
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Sanlialp, Mehmet, Luo, Zheng-Dong, Shvartsman, Vladimir V., Wei, Xianzhu, Liu, Yang, Dkhil, Brahim and Lupascu, Doru C. (2017) Direct measurement of electrocaloric effect in lead-free Ba(SnxTi1-x)O3 ceramics. Applied Physics Letters, 111 (17). 173903. doi:10.1063/1.5001196
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Official URL: https://doi.org/10.1063/1.5001196
Abstract
In this study, we report on investigation of the electrocaloric (EC) effect in lead-free Ba(SnxTi1-x)O3 (BSnT) ceramics with compositions in the range of 0.08 ≤ x ≤ 0.15 by the direct measurement method using a differential scanning calorimeter. The maximum EC temperature change, ΔTEC-max = 0.63 K under an electric field of 2 kV/mm, was observed for the composition with x = 0.11 at ∼44 °C around the multiphase coexistence region. We observed that the EC effect also peaks at transitions between ferroelectric phases of different symmetries. Comparison with the results of indirect EC measurements from our previous work shows that the indirect approach provides reasonable estimations of the magnitude of the largest EC temperature changes and EC strength. However, it fails to describe correctly temperature dependences of the EC effect for the compositions showing relaxor-like behaviour (x = 0.14 and 0.15) because of their non-ergodic nature. Our study provides strong evidence supporting that looking for multiphase ferroelectric materials can be very useful to optimize EC performance.
| Item Type: | Journal Article | ||||||||||||
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| Subjects: | Q Science > QC Physics | ||||||||||||
| Divisions: | Faculty of Science > Physics | ||||||||||||
| Library of Congress Subject Headings (LCSH): | Pyroelectricity, Piezoelectric ceramics | ||||||||||||
| Journal or Publication Title: | Applied Physics Letters | ||||||||||||
| Publisher: | American Institute of Physics | ||||||||||||
| ISSN: | 0003-6951 | ||||||||||||
| Official Date: | 23 October 2017 | ||||||||||||
| Dates: |
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| Volume: | 111 | ||||||||||||
| Number: | 17 | ||||||||||||
| Article Number: | 173903 | ||||||||||||
| DOI: | 10.1063/1.5001196 | ||||||||||||
| Status: | Peer Reviewed | ||||||||||||
| Publication Status: | Published | ||||||||||||
| Publisher Statement: | “This article may be downloaded for personal use only. Any other use requires prior permission of the author and AIP Publishing. This article appeared in Sanlialp, Mehmet, Luo, Zheng-Dong, Shvartsman, Vladimir V., Wei, Xianzhu, Liu, Yang, Dkhil, Brahim and Lupascu, Doru C. (2017) Direct measurement of electrocaloric effect in lead-free Ba(SnxTi1-x)O3 ceramics. Applied Physics Letters, 111 (17). 173903. and may be found at doi:10.1063/1.5001196 | ||||||||||||
| Access rights to Published version: | Restricted or Subscription Access | ||||||||||||
| Copyright Holders: | AIP Publishing | ||||||||||||
| RIOXX Funder/Project Grant: |
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