Effect of electrons on equation of state of porous materials
  A new equation of state (EOS) is developed for porous materials in which contribution of electrons is considered explicitly. This EOS describes anomalous behaviour of hugoniot of porous substances as observed experimentally. Using this EOS, hugoniot of copper and aluminium are evaluated for different porosities and the agreement with experimental data is good. The present EOS is valid over a wide range of porosities (1 to 10). The contribution of electrons is significant for porosity greater than equal to 2. Also, shock and particle velocity curves obtained using this EOS agree well with experimental data. 
Bishnupriya Nayak
cond-mat.mtrl-sci physics.chem-ph