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Hybrid BaTiO_3-PVDF Piezoelectric Composites for Vibration Energy Harvesting Applications

机译：混合BaTiO_3-PVDF压电复合材料在振动能量收集中的应用

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摘要

Hybrid piezoelectric composites were obtained by embedding barium titanate (BTO) nanofibers into a polyvinylidene fluoride (PVDF) matrix. Green BTO fibers were obtained by electrospinning a precursor polymeric solution under an electric field of 1 kV/cm. A network of non-woven ceramic BTO fibers was obtained after calcination of the green fibers. A PVDF solution was deposited over the ceramic fibers by spin-coating and then subjected to a low temperature heat treatment, to evaporate the solvent and promote the crystallization of the polar beta phase of PVDF. In average, the diameter of the ceramic fibers ranged from 105 to 225 nm, presenting ribbon-like shape in some cases. Crystalline phases of BTO and PVDF were confirmed by X-ray diffraction and infrared spectroscopy, respectively. Polarization hysteresis curves revealed a ferroelectric behavior in all samples.
机译：通过将钛酸钡（BTO）纳米纤维嵌入聚偏二氟乙烯（PVDF）基质中来获得混合压电复合材料。通过在1 kV / cm的电场下静电纺丝前体聚合物溶液获得绿色BTO纤维。在生纤维煅烧之后获得非织造陶瓷BTO纤维的网络。通过旋涂将PVDF溶液沉积在陶瓷纤维上，然后进行低温热处理，以蒸发溶剂并促进PVDF极性β相的结晶。平均而言，陶瓷纤维的直径在105至225nm的范围内，在某些情况下呈现带状形状。 BTO和PVDF的结晶相分别通过X射线衍射和红外光谱确认。极化磁滞曲线揭示了所有样品中的铁电行为。

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