摘要:
AgSnO
2 electrical contact materials doped with Bi
2O
3, La
2O
3, and TiO
2 were successfully fabricated by the powder metallurgy method under different initial sintering temperatures. The electrical conductivity, density, hardness, and contact resistance of the AgSnO
2/Bi
2O
3, AgSnO
2/La
2O
3, and AgSnO
2/TiO
2 contact materials were measured and analyzed. The arc-eroded surface morphologies of the doped AgSnO
2 contact materials were investigated by scanning electron microscopy (SEM). The effects of the initial sintering temperature on the physical properties and electrical contact properties of the doped AgSnO
2 contact materials were discussed. The results indicate that the physical properties can be improved and the contact resistance of the AgSnO
2 contact materials can be substantially reduced when the materials are sintered under their optimal initial sintering temperatures.