Describing the properties of compressed expanded graphite through power laws

In this paper, valuable formulae describing the behaviour of a number of physical properties of moderately compressed expanded graphite (CEG) are given. Many of these relationships provide confirmations of empirical power law equations which had remained unexplained. Other physical properties are also described for the first time with power laws whose exponents are derived rigorously. On the basis of early works by the authors, the origins of the observed behaviours are explained, hence providing a better understanding of the material. Thus, the variations with the density of CEG of the thermal and electrical conductivities, elastic moduli, mosaicities, permeabilities, formation factors, characteristic pore radii and diameters, surface areas and open pore volumes are described. Power laws are shown to apply, and the values of the corresponding exponents are compared both with the results of the authors and with those from the literature.