甘氨酸硝酸盐法制备超细Mo-Cu粉末及烧结

Sintering property of superfine Mo-Cu prepared by glycine-nirate process

摘要: 以四水合钼酸铵((NH₄)₆Mo₇O₂₄·4H₂O）、硝酸铜(Cu(NO₃)₂·3H₂O)、甘氨酸和乙二胺为原料采用甘氨酸硝酸盐法（GNP）制备前驱体粉末，经过700 ℃氢气还原2 h得到Mo-Cu复合粉末，经压制后进行真空烧结，研究不同烧结温度对Mo-Cu烧结体性能的影响.结果表明：甘氨酸-硝酸盐法（GNP）制备的超细Mo-Cu复合粉末形状规则、大小均匀、钼铜两相弥散分布，颗粒大小平均为50~80 nm.在950 ℃至1250 ℃范围内，随着烧结温度的升高，烧结体的硬度增大，致密度、电导率和热导率在1 150 ℃达到最大值.

Abstract: The precursor powders were successfully prepared by GNP method with Ammonium molybdate((NH₄)₆Mo₇O₂₄·4H₂O), Cupric nitrate(Cu(NO₃)₂·3H₂O), Glycine and Ethylene diamine, followed by being reduced to Mo-Cu powders in H₂ at 700 ℃. The effects of sintering temperatures on the properties of Mo-Cu alloy were investigated. The results show that the nano-powders with the size of 50~80 nm could be prepared by GNP-H₂reduction method, and Mo phase and Cu phase well dispersed in each particle. With sintering temperatures ranging from 950 ℃ to 1250 ℃, the hardness increased and the relative density, electrical conductivity and thermal conductivity reached the maximum at 1150 ℃.