microstructure and dielectric properties of bzt-bct/pvdf nanocomposites

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ID: 145244
2018
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Abstract
In this paper, the 0.5Ba(Zr0.2Ti0.8)O3-0.5(Ba0.7Ca0.3)TiO3 nanofibers (BZT-BCT NFs) with high aspect ratio were synthesized by electrospinning technique, and the PVDF-based composites filled with the BT NPs or BZT-BCT NFs were fabricated. Obviously, compared to the BT NPs/PVDF composite, the dielectric properties of BZT-BCT NFs/PVDF composites are improved at given volume fraction. The electric modulus formalism indicated that the BZT-BCT NFs could effectively enhance the interfacial polarization of the BZT-BCT NFs/PVDF composites than that of the BT NPs/PVDF composite. In addition, the BZT-BCT NFs with large aspect ratio can make the composites polarize at a higher field strength, thus the composites obtain higher polarization strength. The energy density of 3 vol% BZT-BCT NFs/PVDF composite is 3.08 J/cm3 at 240 kV/mm, which is 2.01 times higher enhancement than the BT NPs/PVDF composite (1.53 J/cm3 at 180 kV/mm). These results also provide a simple but effective method to achieve the materials with high capacitance for energy storage. Keywords: Powders, Nanocomposites, Interfaces, Dielectric properties, Energy storage density
Reference Key
chi2018resultsmicrostructure Use this key to autocite in the manuscript while using SciMatic Manuscript Manager or Thesis Manager
Authors Qingguo Chi, Guang Liu, Changhai Zhang, Yang Cui, Xuan Wang, Qingquan Lei
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Journal international journal of aerospace engineering
Year 2018
DOI
DOI not found
URL
http://www.sciencedirect.com/science/article/pii/S2211379717321563
Keywords
physics

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