Compton scattering of gamma-rays, XRD, TEM and Raman scattering were used to investigate the nanocrystalline graphite produced by mill grinding. The graphite ground for 4 and 8 hours has a typical nanostructure. Further grinding produces a mixture of nanocrystalline and amorphous phases. Compared with the polycrystalline graphite, the electron momentum distribution probability (EMD) of nanocrystalline graphite is a little higher in the low momentum range. We attribute such a change mainly to the high interface ratio of nanograined graphite.
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