Electrical and Surface Morphology of Polyvinylchloride Composites Filled with Aluminum Powder

Abstract

Articles you may be interested inCorrelation of electrical conductivity, dielectric properties, microwave absorption, and matrix properties of composites filled with graphene nanoplatelets and carbon nanotubes Influence of Ga-concentration on the electrical and magnetic properties of magnetoelectric CoGaxFe2−xO4/BaTiO3 composite Electromagnetic properties of ferroelectric/ferromagnetic composite materials base on low temperature cofired ceramic technology J. Appl. Phys. 105, 07D911 (2009); 10.1063/1.3059599 Three-dimensional simulations of the complex dielectric properties of random composites by finite element method J. Appl. Phys. 95, 8110 (2004); Abstract: In this work, the electrical and surface morphology of polyvinyl chloride (PVC) composites filled with different concentration of aluminum powder varying from 0 to 40 wt.% have been prepared by solution costing method.The electrical conductivity of these composites were investigated in the frequency range 100 Hz-10MHz at room temperature. The conductivity of the composites system exhibited a strong frequency dependence particularly in the vicinity of percolation threshold (20 wt.%). It was observed that the electrical conductivity gradually increased with filler concentration and frequency and explained in terms of hopping conduction mechanism. The electrical conductivity of the composites obeys universal power law (i.e. =Af n ), where, n is power exponent. The scanning electron microscope (SEM) micrographs indicate the agglomeration of aluminum particles dispersed within the PVC at the higher aluminum concentration, yielding a conductive path through the composites. It is also corroborated with electrical conductivity result.