Electric conductivity and percolation threshold research of Cu-Cu ₂O cermet

Cu-Cu₂O cermets were prepared via hot pressing(HP) or in situ reduction hot pressing (ISPHP). The results of electric conductivity tests show that the percolation threshold of the cermet', which is prepared by HP, is lower than that of cermet prepared by ISRHP. The electric conductivity and the percolation threshold depend on four influencing factors: the content, the size, the shape and the distribution of Cu phase. The electric conductivity decreases with the increase of Cu particle size, and decrease of the aspect ratio of Cu particle. The more even the Cu phase distribution, the higher the electric conductivity of the cermets.