Abstract

Graphite encapsulated iron nanoparticles were prepared by ball-milling and subsequently annealing a mixture of expanded graphite and iron powders. The nanoparticles were characterized by transmission electron microscope (TEM) and X-ray diffraction (XRD). The formation mechanism of the nanoparticles was discussed. The results show that the nanoparticles have a size range of 20-150 nm, and graphite and iron in the nanoparticles have a higher crystallinity

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