Effect of Size of Graphite Flakes on the Physical Properties of the Graphite Materials

Abstract:

Mesophase pitch and natural graphite flake were applied as raw materials to prepare the graphite materials by a hot-pressing technique at a relatively low temperature. In this work, the effect of mean size of natural graphite flake on physical properties and microstructure of the graphite materials were investigated. X-ray analyses, field emission scanning electron microscopy and polarized light microscopy observations indicate that the graphite blocks have highly preferred structural orientation perpendicular to the hot-pressing direction. Results shows that the graphite materials have a low electrical resistivity of 2.45μΩ·m and a high thermal conductivity of 498 W/m·K ,as well as a high bending strength of 26.71 MPa when the mean size of graphite flake in raw materials was 425μm.

• Periodical: Key Engineering Materials (Volumes 609-610)
• Pages: 238-243
• DOI: https://doi.org/10.4028/www.scientific.net/KEM.609-610.238
• Online since: April 2014
• Authors: Shu Jie Sun, Xiu Jun Liu*, Tong Qi Li, Zhen Fan, Zhi Hai Feng
• Keywords: Graphite Materials, Mean Particle Size, Physical Properties

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