期刊
APPLIED PHYSICS LETTERS
卷 100, 期 22, 页码 -出版社
AMER INST PHYSICS
DOI: 10.1063/1.4722932
关键词
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资金
- Army Research Office [W911NF-11-1-0534]
- U.S. DoE, Office of Basic Energy Sciences, Division of Materials Science and Engineering [DE-FG02-07ER46410]
- Nanjing University, China
- EE Department of PSU
The electrocaloric effect in the blends of poly(vinylidene fluoride-trifluoroethylene-chlorofluoroethylene) (P(VDF-TrFE-CFE)) with small amount of poly(vinylidene fluoride-trifluoroethylene) (P(VDF-TrFE)) is investigated. It was found that small amount of P(VDF-TrFE) (similar to 10 wt. %) can cause a more than 10% increase in the crystallinity in the blends. Although the two polymers form separate crystalline phases, the interfacial couplings to the random defects in the terpolymer convert the normal ferroelectric P(VDF-TrFE) into a relaxor ferroelectric. As a result, the blends with 10 wt. % of P(VDF-TrFE) exhibit a 30% increase in the adiabatic temperature change over the entire experimental temperature range (20 degrees C-60 degrees C). (C) 2012 American Institute of Physics. [http://dx.doi.org/10.1063/1.4722932]
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