Abstract
Abstract Dielectric properties of aluminium filled epoxy composites have been analyzed as a function of frequency (1 kHz–1 MHz), temperature (room temperature to 150 °C) and volume fraction of aluminium filler (f). Improvement in dielectric constant was observed with the increase in filler concentration, which is attributed to increase in interfacial polarization and cluster formation of filler. Increment in dielectric constant with temperature for all samples was ascribed to increase in segmental mobility due to metal incorporation in polymer matrix. Different theoretical models considered to discuss the dielectric properties of composites. AC conductivity study has been carried out to understand the charge transport mechanism present in the composites. Thermal conductivity and hardness of the composites are also measured, which are essential parameters for embedded capacitors applications.
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