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首页> 外文期刊>RSC Advances >Large d(33) and enhanced ferroelectric/dielectric properties of poly(vinylidene fluoride)-based composites filled with Pb(Zr0.52Ti0.48)O-3 nanofibers
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Large d(33) and enhanced ferroelectric/dielectric properties of poly(vinylidene fluoride)-based composites filled with Pb(Zr0.52Ti0.48)O-3 nanofibers

机译：Pb（Zr0.52Ti0.48）O-3纳米纤维填充的聚偏二氟乙烯基复合材料的大d（33）和增强的铁电/介电性能

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摘要

Pb(Zr0.52Ti0.48)O-3 (PZT) nanofibers with diameters of 150-200 nm are prepared via electrospinning and used as dielectric fillers in poly(vinylidene fluoride) (PVDF)-based composite films. Highly flexible polymer composite films are fabricated with a solution cast method. Enhanced dielectric constants are obtained at low volume fraction of PZT nanofibers. The orientation of PZT nanofibers perpendicular to the external electric field gives rise to improved dielectric breakdown strength. A subsequent uniaxial stretching of the composite films leads to higher crystallinity and breakdown strength of the polymer composites, which is favorable for the polarization of the nanocomposites at higher electric fields. Enhanced ferroelectric properties, i.e., higher saturated and remnant polarization, are obtained in these composite films. A high piezoelectric coefficient (d(33)) of similar to 87.4 pm V-1 is also achieved for the polymer composite films filled with only 2.4 vol% of PZT nanofibers. The results show that the PZT/PVDF composite films have potential applications in piezoelectric sensors, and even piezoelectric actuators.
机译：通过电纺制备直径为150-200 nm的Pb（Zr0.52Ti0.48）O-3（PZT）纳米纤维，并用作聚偏二氟乙烯（PVDF）基复合膜中的介电填料。用溶液流延法制备高挠性聚合物复合膜。在低体积分数的PZT纳米纤维中可获得增强的介电常数。 PZT纳米纤维垂直于外部电场的取向提高了介电击穿强度。复合膜的随后单轴拉伸导致聚合物复合物的更高的结晶度和击穿强度，这有利于纳米复合物在较高电场下的极化。在这些复合膜中获得增强的铁电性能，即较高的饱和极化和残余极化。对于仅填充2.4％（体积）PZT纳米纤维的聚合物复合薄膜，也可以获得类似于87.4 pm V-1的高压电系数（d（33））。结果表明，PZT / PVDF复合膜在压电传感器甚至压电致动器中具有潜在的应用。

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