Abstract:Cu-C-SnO ₂composite porous materials with different addition contents of SiO ₂-B ₂O ₃-Al ₂O ₃scaling powder by mass were prepared by pressureless sintering, the phase composition and physical properties of Cu-C-SnO ₂porous materials were analyzed and tested, and the effects of scaling powder contents on the microstructures and properties of Cu-C-SnO ₂porous composites were investigated. The results show that, the suitable content of scaling powder is conducive to the sintering of Cu-C-SnO ₂mixture powders. When the scaling powder content is not excess 5% by mass, the gas permeability and hardness of the sintered compact decrease with the increase in scaling powder content, but the electroconductibility and sintering shrinkage increase as the scaling powder content increases. Meanwhile, the sintering temperature has little influence on the sintering performance of Cu-C-SnO ₂mixture powders and the properties of sintered compact at the range of 730~770℃.