Enhanced electrocaloric effect in lead-free organic and inorganic relaxor ferroelectric composites near room temperature

Haibibu Aziguli; Xin Chen; Yang Liu; Guang Yang; Ping Yu; Qing Wang

doi:10.1063/1.5028459

Enhanced electrocaloric effect in lead-free organic and inorganic relaxor ferroelectric composites near room temperature

Haibibu Aziguli, Xin Chen, Yang Liu, Guang Yang, Ping Yu, Qing Wang

Research output: Contribution to journal › Article › peer-review

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Abstract

We study the electrocaloric effect in the composites composed of the ferroelectric poly(vinylidene fluoride-trifluoroethylene-chlorofluoroethylene) [P(VDF-TrFE-CFE)] terpolymer matrix and lead-free BaZr_0.2Ti_0.8O₃ (BZT) fillers. The P(VDF-TrFE-CFE)/BZT composite with 5 vol. % BZT exhibits a high adiabatic temperature change of ΔT = 7.4 K and a large isothermal entropy change of ΔS = 30 J kg^-1 K^-1 under an electric field of 90 MV m^-1 at room temperature. The electrocaloric response in the composites is significantly enhanced when compared to those of the constituent components, which has been attributed to the polymer-filler interfacial coupling effect. In addition, the composites display a wide operational temperature window as a result of their ferroelectric relaxor nature.

Original language	English (US)
Article number	193902
Journal	Applied Physics Letters
Volume	112
Issue number	19
DOIs	https://doi.org/10.1063/1.5028459
State	Published - May 7 2018

All Science Journal Classification (ASJC) codes

Physics and Astronomy (miscellaneous)

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10.1063/1.5028459

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title = "Enhanced electrocaloric effect in lead-free organic and inorganic relaxor ferroelectric composites near room temperature",

abstract = "We study the electrocaloric effect in the composites composed of the ferroelectric poly(vinylidene fluoride-trifluoroethylene-chlorofluoroethylene) [P(VDF-TrFE-CFE)] terpolymer matrix and lead-free BaZr0.2Ti0.8O3 (BZT) fillers. The P(VDF-TrFE-CFE)/BZT composite with 5 vol. % BZT exhibits a high adiabatic temperature change of ΔT = 7.4 K and a large isothermal entropy change of ΔS = 30 J kg-1 K-1 under an electric field of 90 MV m-1 at room temperature. The electrocaloric response in the composites is significantly enhanced when compared to those of the constituent components, which has been attributed to the polymer-filler interfacial coupling effect. In addition, the composites display a wide operational temperature window as a result of their ferroelectric relaxor nature.",

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T1 - Enhanced electrocaloric effect in lead-free organic and inorganic relaxor ferroelectric composites near room temperature

AU - Aziguli, Haibibu

AU - Chen, Xin

AU - Liu, Yang

AU - Yang, Guang

AU - Yu, Ping

AU - Wang, Qing

PY - 2018/5/7

Y1 - 2018/5/7

N2 - We study the electrocaloric effect in the composites composed of the ferroelectric poly(vinylidene fluoride-trifluoroethylene-chlorofluoroethylene) [P(VDF-TrFE-CFE)] terpolymer matrix and lead-free BaZr0.2Ti0.8O3 (BZT) fillers. The P(VDF-TrFE-CFE)/BZT composite with 5 vol. % BZT exhibits a high adiabatic temperature change of ΔT = 7.4 K and a large isothermal entropy change of ΔS = 30 J kg-1 K-1 under an electric field of 90 MV m-1 at room temperature. The electrocaloric response in the composites is significantly enhanced when compared to those of the constituent components, which has been attributed to the polymer-filler interfacial coupling effect. In addition, the composites display a wide operational temperature window as a result of their ferroelectric relaxor nature.

AB - We study the electrocaloric effect in the composites composed of the ferroelectric poly(vinylidene fluoride-trifluoroethylene-chlorofluoroethylene) [P(VDF-TrFE-CFE)] terpolymer matrix and lead-free BaZr0.2Ti0.8O3 (BZT) fillers. The P(VDF-TrFE-CFE)/BZT composite with 5 vol. % BZT exhibits a high adiabatic temperature change of ΔT = 7.4 K and a large isothermal entropy change of ΔS = 30 J kg-1 K-1 under an electric field of 90 MV m-1 at room temperature. The electrocaloric response in the composites is significantly enhanced when compared to those of the constituent components, which has been attributed to the polymer-filler interfacial coupling effect. In addition, the composites display a wide operational temperature window as a result of their ferroelectric relaxor nature.

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Enhanced electrocaloric effect in lead-free organic and inorganic relaxor ferroelectric composites near room temperature

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