Effects of Particle Size of Coke on the Electrical Property and Hardness of Copper/Coke/Phenolic Resin Composites
Composites made from phenolic resin are filled with conductive filler mixtures containing coke powder and copper powder. They are fabricated by compression molding, followed by post-curing method. The density, electrical conductivity and hardness of composite are analyzed to determine the influence of coke particle size on the physical, electrical and mechanical properties of composite. It is found that there is a marked dependence of the density, electrical conductivity and hardness on coke particle size. The density and hardness decrease with the increasing of coke particle size. However the electrical conductivity increases with the increasing of coke particle size. The increasing of coke particle size from 0-48 µm to 75-180 µm promotes a considerable increase in electrical conductivity by about 204%. The intra-particle conductivity and connectivity of copper particle could be the main reasons for the increasing of electrical conductivity as coke particle size increases.
Jimmy (C.M.) Kao, Wen-Pei Sung and Ran Chen
M. D. Li et al., "Effects of Particle Size of Coke on the Electrical Property and Hardness of Copper/Coke/Phenolic Resin Composites", Advanced Materials Research, Vols. 581-582, pp. 1027-1030, 2012