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 journalArticle

8 Citations (Scopus)

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 0.2 Ti 0.8 O 3 (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 languageEnglish (US)
Article number193902
JournalApplied Physics Letters
Volume112
Issue number19
DOIs
StatePublished - May 7 2018

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composite materials
room temperature
vinylidene
fillers
fluorides
entropy
temperature
electric fields
polymers
matrices

All Science Journal Classification (ASJC) codes

  • Physics and Astronomy (miscellaneous)

Cite this

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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 BaZr 0.2 Ti 0.8 O 3 (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. / Aziguli, Haibibu; Chen, Xin; Liu, Yang; Yang, Guang; Yu, Ping; Wang, Qing.

In: Applied Physics Letters, Vol. 112, No. 19, 193902, 07.05.2018.

Research output: Contribution to journalArticle

TY - JOUR

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 BaZr 0.2 Ti 0.8 O 3 (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 BaZr 0.2 Ti 0.8 O 3 (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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