中文摘要：

采用液-固掺杂工艺将La（NO3）3与WO3混合,经干燥、La（NO3）3裂解和WO3还原等工艺制备含有La2O3的稀土W粉,采用粉末冶金-熔渗法制备含有La2O3的CuW电触头;研究了保温时间对La（NO3）3裂解的影响以及La2O3对CuW电触头性能的影响.结果表明：用液-固混料法制备的稀土W粉,La2O3分布均匀,粉末粒度较细;La（NO3）3裂解粉末的颗粒随着保温时间的延长而长大;掺杂La2O3的CuW触头耐电弧烧蚀性能有显著的提高.

英文摘要：

W powders with rare earth oxide La2O3 were prepared by liquid-solid blending method, which includes mixing La（NO3）3 and WO3, drying, decomposition of La（NO3）3 and reduction of WO3. CuW electrical contact materials with La2O3 were fabricated by powder metallurgy-infiltration technology. The effect of holding time on the revivification of La（ NO3 ）3 and that of La2O3 addition on the properties of CuW electric contact materials were investigated. The results show that La2O3 distributes uniformly in fine tungsten compound powders, and the particle size of powders decomposed by La（ NO3 ）3 increases with prolonging holding time. The electrical breakdown strength of CuW electrical contact materials doped with La2O3 increases significantly.