Dielectric properties of aluminium powder-epoxy resin composites

Radiation induced modification of dielectric and structural properties of Cu/PMMA polymer composites

“…It was observed that the dielectric constant increases with increasing the concentration of the copper. Similar results were also observed by the number of researchers [11,[12][13][14][15]. The dielectric constant was found to increase further upon SHI irradiation.…”

Electrical conductivity studies on carbon black loaded ethylene butylacrylate polymer composites

“…The dielectric permittivity becomes then in the form ε Ã ≈−i σ DC 2πεοF . This behavior was highlighted by Baziard et al [30] on materials made up of copper particles dispersed in a polymer epoxy of the type DGEBA, in the interval ranging between 10 Hz and 800 kHz. In addition, Achour et al [31] have investigated the dielectric response of samples of carbon black-polymer matrix, in the frequency range from 100 Hz to 15 MHz with volume fraction Φ below and above the percolation threshold Φ c. They provided observational evidence showing that dipolar relaxation and anomalous low-frequency dispersion are likely the transport mechanisms in these samples below and above percolation, respectively.…”

Study of dielectric relaxations in zinc oxide-epoxy resin nanocomposites

“…The first one (1850 Hz) is attributed to interfacial relaxation process known as MWS effect. In fact, epoxy resin networks present a lacunar structure with microspherical voids produced during mixing process when air liberation is restricted due to the system viscosity [1,37]. Consequently two phases with different permittivities are then present in these systems, air and polymeric matter.…”

“…These composite polymeric materials have found a variety of applications because they constitute excellent models for studying the interactions between condensed matter and electromagnetic radiation such as microwaves. They are also used for spatial applications [1]. These composites are considered as heterogeneous disordered systems [2,3].…”