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Epoxy resin and its microcomposite are widely used as electrical insulation in electrical equipment. Surface flashover and breakdown properties of these materials can be influenced by dielectric relaxation process and charge carrier behavior. The charge transport characteristics and dielectric relaxation process for neat EP and its microcomposites were studied by means of dielectric relaxation spectroscopy...
The influence of ozone surface treatment on surface flashover performance of epoxy resin/AhO3 microcomposites was investigated. Epoxy resin/AhO3 microcomposite samples with a diameter of 50 mm and a thickness of 1 mm were prepared and treated by ozone for various periods. Surface potential decay, surface conductivity, secondary electron emission coefficient, and surface flashover voltage in SF6 of...
Type NaY zeolite powder with nanoscale and micronscale were doped in low-density polyethylene(LDPE). The zeolite particles with nanoscale and also with micronscale were uniformly distributed in LDPE shown in SEM images. The dielectric spectra of LDPE/zeolite composites and pure LDPE are tested by broadband dielectric spectrometer at two different temperatures, 293K and 353K. The study found that composites'...
Electrostatic Force Microscope (EFM) was applied to study the origin and decay properties of surface charge on original and corona-resistant Polyimide films in micro-nanometer scale. The surface charge were generated by injecting on the surfaces of the polyimide (PI) films using the conductive probe of EFM. After the surface charge were characterized by EFM, the results indicate that the difference...
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