The breakdown characteristic of porous dielectric discharge based on percolation structure

Abstract

Abstract Porous dielectrics have received increasing attention in plasma sterilization, all-solid-state battery technology, and surface functionalization of biological tissue materials. Due to their complex structure and discharge characteristics, the current researches are hard to quantify the stochastic properties of porous dielectrics. In this paper, we used a percolation structure to simulate the discharge process in a 2D porous dielectric. The simulation results of the 2D percolation model are similar to that of 2D real porous slices, which can characterize the physical properties of the porous dielectric well while greatly reducing the time required for simulation. In addition, simulations on percolation models with different porosity and lattice size are performed. When the porosity and lattice size remain constant, tortuosity and Debye radius are the main factors affecting the breakdown of the percolation model. With the decrease in porosity, the Pashcen curve shifts to the upper right. With the decrease in lattice size, the Pashcen curve moves higher. The results show correlations between random parameters and Paschen curves. This study presents a novel simulation approach for the theoretical analysis of porous dielectric and improves the simulation efficiency at the same time. In addition, this new model is also applied to quantify the impact mechanism of random parameters such as porosity and lattice size on porous dielectric discharge.