真空蒸发冷凝制备超细铜粉的研究  

Characterization of Superfine Copper Powders Grown By Vacuum Evaporation

作　　者：时圣店[1,2] 杨斌[1,2] 徐宝强[2] 熊恒[2] 戴永年[1,2] 

机构地区：[1]昆明理工大学真空冶金国家工程实验室,昆明650093 [2]云南省有色金属真空冶金重点实验室,昆明650093

出　　处：《真空科学与技术学报》2011年第3期336-340,共5页Chinese Journal of Vacuum Science and Technology

基　　金：国家自然科学基金-云南联合基金资助项目(u0837604);高等学校博士学科点专项科研基金(20095314110003)

摘　　要：借助激光粒度分析仪、扫描电镜、辉光放电质谱仪和X射线衍射仪等手段研究了真空蒸发冷凝制备超细Cu粉的方法及规律。实验表明,金属Cu的蒸发速率受蒸发温度和真空度的影响较大,所得Cu粉为面心立方晶体,形状规则,平均粒径小于2μm,分散性好,而且在真空条件下有利于制备高纯Cu粉。考察了蒸发温度、真空度、保温时间和冷凝条件四个因素对超细Cu粉粒度和形貌的影响规律,并用成核理论进行了分析。The superfine copper powders were grown by vacuum evaporation and condensation.The impacts of the growth conditions,including evaporation rate and evaporation temperature,pressure,and cooling rate,on microstructures and properties of the copper grains were characterized with X-ray diffraction,scanning electron microscopy,and glow discharge mass spectrometry.The results show that the pressure and evaporation temperature strongly affect both the microstructures and evaporation rate of Cu grains.For instance,under optimized conditions,the fairly uniform,well-dispersed Cu particles with face-centered cubic structures and an averaged size of 2 μm,were obtained.Possible mechanism was also tentatively discussed.

关 键 词：超细Cu粉 真空 蒸发冷凝 形貌表征 

分 类 号：TF123.72[冶金工程—粉末冶金]