Empty Pores Research Articles

Closed Pores in Synthetic Graphite

IT is well known that the bulk density of a synthetic graphite is much lower than the density of the crystallites obtained from X-ray measurement: 25–30 per cent of the volume must be empty pore space. By measurement of the real density with three different fluids, we have shown that about 20 per cent of the total pore space cannot be reached by a liquid or gas unless the graphite is reduced to a very fine particle-size, or part of the structure is removed by oxidation.