Electrical properties of Barium titanate and graphite incorporated PVA matrix composite (PVA-BaTiO3-G) nanofibers

Abstract

Ternary composite nanofibers of Barium titanate (BT) and Graphite (G) reinforced Polyvinyl alcohol (PVA) were fabricated and their electrical properties were evaluated. The composites were synthesized by incorporating different weight ratios of BT and G in PVA matrix, and then spun into composite nanofibers by electrospinning techniques. The composite nanofibers were characterized by FTIR spectroscopy, X-ray diffraction analysis, scanning electron microscopy and energy dispersive x-ray spectroscopy. The electrical and dielectric properties of composite nanofibers were investigated by LCR meter. Results indicated that the composite nanofiber containing 5 wt% of BT and G exhibited superior electrical properties. The highest dielectric constant of 6.4 was indicated by PVA-BT-G:5% composite nanofiber, however, with increase in fillers ratio the dielectric constant decreased to 2.6 in case of PVA-BT-G:15%, likewise the highest value of capacitance was observed to 10pF for PVA-BT-G:15% sample. Similarly optimum AC conductivity was observed to be 7.7×10-8S/m for PVA-BT-G:5% composite. The results show that these composites could be used for fabrication of microelectronic devices.