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Dielectric Properties of Epoxy /Cu, Al Composites |
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PP: 65-76 |
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Author(s) |
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Ahmad A. Hasan,
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Abstract |
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| Epoxy/ Cu,Al composites with different Cu,Al contents were prepared and fully characterized. Measurements of A.C conductivity of EP/Cu,Al composites films over frequency range (102-107Hz)and temperature range (293-373K)have been performed. The influence of Cu and Al loading levels on various properties was also explored. Dielectric and electrical properties of Cu,Al /epoxy composites were studied for samples in parallel plate configuration Cu,Al /epoxy composites prepared in this fashion reached a high dielectric constant close to 208 at Cu =15% at T= 353K , a dielectric loss tangent less than 1.07at room temperature and 100 Hz. The variation of activation energy and conduction behavior has been studied. The calculated activation energy varied with Cu and Al content, temperature, and applied frequency. Conductivity plots against frequency suggested the response obeying the universal power law concerning the AC conductivity and dielectric behavior of polymer. The polarizability increases with increase of Cu and Al content and temperature indicating weekends and of intermolecular forces.The results were interpreted according to the increase of charge carriers accompanied the addition of both elements to EP. |
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