The quantitative analysis of the pores is possible by scanning electron microcopy (SEM) or polarizing optical microscopy (POM) observation, but the magnification of these images is of /m order. Therefore these methods are effective for the macropore analysis, as is clear from Figure 7. For example, Inagaki and Suwa analyzed the macropore structure in exfoliated graphite by using SEM images . Also the analysis of the pore in high density isotropic graphite was carried out by the POM method .
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