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Abstract

Electrical properties of the prepared polymer films, made of poly (ethylene oxide) (PEO) filled with electrolyte alum salt of different concentrations, and doped with conductive carbon black (CB) nanoparticles (0.1 wt%), have been investigated. Electrical properties were studied as a function of filler content and applied field frequency at T=40 °C. The observed physical constants of the casted thin films like AC conductivity, phase angle, impedance, dielectric constant, and electric modulus were determined. It was found that these measured quantities vary with the alum content and applied field frequency. The AC conductivity (s_ac) increases with increasing alum concentration and frequency. The dielectric constant (e') and the dielectric loss (e\) of the composites decrease with frequency and increase with alum concentration. The dependence of the electric modulus on frequency exhibit a relaxation peak occurs at 500 kHz."