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Summary
In recent times, there have been increasingly more researches on the dielectric properties of carbon-based composites, and its dielectric tunability is a sizzling analysis matter. On this paper, epoxy resin/carbon fiber/phenolic residual carbon (EP/CF/C) was ready by high-temperature sintering, vacuum liquid section impregnation and hot-press curing strategies. The AC conduction habits, dielectric properties and impedance properties of composites with completely different CF/C compression ratios (1, 1.5, 2) are studied. With the rise of CF/C compression ratio, the adverse dielectric properties of composites are getting stronger and stronger. The outcomes present that when the CF/C compression ratio is 1, the composites happen percolation phenomenon and dielectric fixed is adverse. When the CF/C compression ratio is 2, absolutely the worth of the adverse dielectric coefficient of the EP/CF/C composite reaches 9.8 × 104, and the conductivity reaches 0.54 S/cm. As well as, impedance evaluation has additional confirmed that the inductance properties result in the adverse dielectric properties of the fabric. The adjustable adverse dielectric properties of EP/CF/C composites can present some solutions for the sector of electromagnetic shielding and capacitors.
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