Electrical tree formation in polymer-filler composites
| Autor: | Sijay Huang, Biswajit Ray, R.S. Gorur, Timothy B. Boykin |
|---|---|
| Rok vydání: | 2019 |
| Předmět: |
010302 applied physics
chemistry.chemical_classification Filler (packaging) Materials science Monte Carlo method Electric breakdown Mixing (process engineering) Dielectric Polymer 01 natural sciences Fractal dimension Condensed Matter::Materials Science Tree (data structure) chemistry 0103 physical sciences Electrical and Electronic Engineering Composite material |
| Zdroj: | IEEE Transactions on Dielectrics and Electrical Insulation. 26:1853-1858 |
| ISSN: | 1558-4135 1070-9878 |
| DOI: | 10.1109/tdei.2019.008186 |
| Popis: | Insulating fillers are often mixed with polymer dielectrics in order to improve dielectric breakdown strength. However, filler-loaded dielectric films show higher variability, which limits their large-scale utility and application. In this paper, we present a computational framework for predicting the spatial distribution of electrical tree formation in a polymer dielectric in the presence of insulating fillers. The framework is based on the numerical solution of Poisson's equation inside the dielectric film and the application of the Monte Carlo model for finding the electric breakdown path. The simulation results explain several puzzles associated with the breakdown of polymer-filler dielectrics, such as (1) the improved breakdown strength with insulating filler mixing, (2) high degree of variability in breakdown measurements, and (3) effects of filler size, shape and position on the breakdown. In addition, the proposed framework not only provides the physical understanding of the breakdown process but also inspires new design concepts to improve the breakdown strength of the polymer composite. |
| Databáze: | OpenAIRE |
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