Implementation of Second Conductive Filler to Improve the Properties of Hybrid Graphite Composites

Abstract

Hybrid graphite composite is a potential material for various electronic device applications, requiring good electrical conductivity properties. This study aims to investigate the electrical conductivity and tensile strength of hybrid graphite composites (epoxy/G150/G75 composites) for engineering applications. The larger conductive filler (150 µm) was used as the main conductive filler, while the smaller one (75 µm) was used as the secondary conductive filler in several different compositions. The casting process was used to produce hybrid graphite composites based on predetermined parameters. The results showed that the highest electrical conductivity and tensile strength were obtained in hybrid graphite composites at a composition of 80 wt. % (70 wt. %G150 and 10 wt. % G75), namely 25.5 S/cm and 4.5 N/mm2. The increase of secondary conductive filler content and curing temperature were significantly increased the electrical conductivity and tensile strength of the resulting hybrid graphite composites.