真空蒸发—冷凝法制备片状Cu粉  

Preparation of flake copper powder by the evaporation and condensation in vacuum

作　　者：时圣店[1,2] 杨斌[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：《粉末冶金技术》2011年第2期110-114,119,共6页Powder Metallurgy 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项目(20095314110003)

摘　　要：采用蒸发—冷凝法在真空条件下制备了片状Cu粉,并用激光粒度分析仪（SL）、扫描电镜（SEM）、辉光放电质谱仪（GDMS）和X射线衍射仪（XRD）对片状Cu粉进行表征。结果表明,制备的Cu粉为面心立方结构,表面平整,分散性好,粒径为10~30μm,厚1~2μm。试验考察了蒸发温度、真空度、保温时间和冷凝高度4个因素对片状Cu粉粒径和形貌的影响,发现蒸发温度和真空度对蒸发速率有较大影响;探讨了Cu粉颗粒的形成机制。The flake copper powder was prepared by the evaporation and condensation in vacuum,and characterized by laser particle size analyzer（SL）,scanning electron microscopy（SEM）,glow discharge mass spectrometry（GDMS） and X-ray diffraction（XRD）.The results reveal that the copper powders are of face-center-cubic structure,with even surface and uniform shape,and dispersed well.The average particle size is 10～30μm,the thickness of the flake copper powder is about 1～2μm.The influence of evaporating temperature,vacuum degree,holding time and condensation distance on particle size and morphology was investigated.Results show that evaporating rate is effected by evaporating temperature and vacuum degree.The formation mechanism of Cu particles was discussed.

关 键 词：片状Cu粉 真空 蒸发—冷凝法 形貌表征 

分 类 号：TG174.42[金属学及工艺—金属表面处理]