Electrical and Flexural Properties of Copper and Graphite Filled Phenolic Resin Composites

Mi Dan Li; Huan Niu; Shou Bin Wei; Hong Yang

doi:10.4028/www.scientific.net/AMR.418-420.1044

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Electrical and Flexural Properties of Copper and Graphite Filled Phenolic Resin Composites
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HomeAdvanced Materials ResearchAdvanced Materials Research Vols. 418-420Electrical and Flexural Properties of Copper and...

Electrical and Flexural Properties of Copper and Graphite Filled Phenolic Resin Composites

Abstract:

Composites made of phenolic resin filled with graphite platelets and copper particles (copper powder, copper fiber or both mixture), are fabricated by mechanical mixing. The electrical conductivity of composite composed of 30 wt% resin, 50 wt% graphite and 20 wt% copper powder is up to 600S/cm. The efficiency of copper powder is compared with copper fiber. The results show that copper powder is more effective than copper fiber in improving electrical conductivity. The particle shape is also a principal factor in influencing flexural strength. In this study, the flexural strength of composites tends to increase with decreasing the ratio of copper fiber/copper powder because the dendritic structure of copper powder enhances the probability of graphite platelets embedded in the dendritic arms, which in fact help to distribute the external load from matrix to copper powders.