Thickness Influence on the Conducting State of ZnO-Based Adaptive Composites with Electrodes in a Staggered Arrangement in the Horizontal Direction

Recent years have witnessed the widespread application of nonlinear composites in the power electric field. However, little light was thrown into the situation that the highvoltage and ground-voltage electrodes were arranged on opposite sides with a horizontal width. In this paper, $40 \mathrm{vol} \%$ ZnO /silicone rubber nonlinear composites with different thicknesses of $200~\mu \mathrm{m}, 300~\mu \mathrm{m}$, and $400~\mu \mathrm{m}$ were prepared and tested the conductivities, whose horizontal width of electrodes were all set as $50~\mu \mathrm{m}$. When the sample thickness increased from $200~\mu \mathrm{m}$ to $400~\mu \mathrm{m}$, the DC conductivity curve shifted to the right, I Leakage dropped from $2.69 \times 10^{-8}$ A to $1.43 \times 10^{-9} \mathrm{~A}$, and $\mathrm{U}_{1~\mu A}$ rose from 459 V to 962 V. The physical structures of the composites were built to explain the results. This work will hopefully promote the practical application of ZnO-based nonlinear composites further.