Dielectric response in novel polyvinylidene fluoride/nanoquasicrystalline composites

摘要

The dielectric behavior of polyvinylidene fluoride/nanoquasicrystalline Al-Cu-Fe composites has been investigated over a broad frequency range. High effective dielectric constant (3800) at 100 Hz is observed near the percolation threshold. The dielectric behavior has been explained on the basis of boundary layer capacitor effect, Maxwell Wagner Sillars interfacial polarization and percolation theory while the dielectric anomalies are attributed to process of fabrication leading to thick insulating layer between the filler particles forming a gap in effective tunneling range of two filler particles, inhibiting the probability of higher order tunneling The mechanical/electronic properties of these composites will make them suitable for multifunctional applications.