Electric conductivity and percolation threshold research of Cu-Cu2O cermet
(1.黑龙江省哈尔滨市哈尔滨工业大学材料科学与工程学院2.School of Materials Science and Engineering, Harbin Institute of Technology, Harbin 150001, China3.Department of Materials Science and Engineering, Tsinghua University, Beijing 100084, China)
Abstract: 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.
Key words: cermet； percolation threshold； electrical conductivity