Affiliation:
1. School of Energy and Materials Shanghai Polytechnic University Shanghai China
2. Xi'an Institute for Innovative Earth Environment Research Xi'an China
3. Shanghai Engineering Research Center of Advanced Thermal Functional Materials Shanghai Polytechnic University Shanghai China
Abstract
AbstractBarium titanate (BaTiO3, BT) was co‐doped by solid‐state sintering with niobium pentoxide (Nb2O5) and cobalt trioxide (Co3O4) as dopants. The modified barium titanate containing Nb and Co (BTNC) with larger particle size (0.5–1 μm) and silver powder (Ag) with smaller particle size (25 nm) were co‐filled with polyvinylidene fluoride (PVDF) to prepare (BTNC‐Ag)/PVDF three‐phase composites. The morphology and crystal structure of composites were characterised by scanning electron microscope (SEM) and X‐ray diffraction (XRD), respectively. SEM shows that when the volume ratio of BTNC and Ag in the composite is 4:1, the two fillers have good dispersion in polymer matrix and could intersperse with each other to reduce voids. XRD patterns display that the filling of BTNC and Ag powders was conducive to promoting the enhancement of the diffraction peaks of β phase and γ phase in PVDF. The dielectric properties of the composites are effectively enhanced through the synergistic effect of the micro‐nano bicomponent ceramic BTNC and conductive particles Ag co‐filled polymer PVDF. When the volume ratio of filler (BTNC:Ag = 4:1) to matrix PVDF is 2/1, the dielectric properties of the composite are the best, the dielectric constant reaches 134.1 at 102 Hz and the dielectric loss is 0.04.
Publisher
Institution of Engineering and Technology (IET)
Subject
Materials Chemistry,Electrical and Electronic Engineering,Condensed Matter Physics,Atomic and Molecular Physics, and Optics,Electronic, Optical and Magnetic Materials
Cited by
4 articles.
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