DC voltage current characteristic of Silicon Carbide/ low-density polyethylene composites

In this paper, nonlinear composite materials were prepared by filling Silicon Carbide (SiC) powder into low-density polyethylene (LDPE). The effect of contents and particle sizes of SiC on the DC voltage current characteristic of SiC/ LDPE composite materials was studied. The results showed that the conductivity and non-linear conductive coefficient of the composites increased with the contents of SiC. The particle size of SiC had no effect on the DC voltage current characteristic of composites when filler concentration was low, while when the concentration was increased, the conductivity and non-linear conductive coefficient of composites increased with particle size of SiC. The conductivity and non-linear conductive coefficient of the composites filled by nano-meter SiC were superior to those of the composites filled by micro-meter SiC with the same content.