Distortion of Graphite Structure under Ball Milling

Well-crystalline graphite was treated by high-energy ball milling processing for different milling time, and the samples were examined by X-ray diffraction, Raman scattering and high resolution transmission electron microscopy. After ball-milling for 150h the structure of the pristine well-crystalline graphite was damaged. Besides a great many of defects were induced, the graphite layers were exfoliated and crumpled, leading to formation of nanostructures consisting of polyhedral particles and nanoarches. After ball-milling for 250h the aromatic layers were completely broken and destroyed, and a microporous carbon was formed by the strongly misoriented Basic Structure Units(BSU). After heat treatment at 3000℃, the graphite organization was not recovered.