自悬浮定向流法制备纳米Cu粉的微结构和性能表征  

Microstructure and properties of nano-copper powders prepared by flow-levitation method

作　　者：楚广[1] 熊志群 刘伟[1] 韦建军[3] 

机构地区：[1]中南大学冶金科学与工程学院,长沙410083 [2]长沙职工大学,长沙410008 [3]四川大学原子与分子物理研究所,成都610065

出　　处：《中国有色金属学报》2007年第4期623-628,共6页The Chinese Journal of Nonferrous Metals

摘　　要：采用自悬浮定向流法制备纳米Cu粉;用透射电镜、X射线衍射、紫外-可见光吸收光谱、差示扫描量热-热重法和X射线光电子能谱分析对纳米Cu微晶的形貌、粒度、结构和性能进行研究。研究结果表明:在体积分数为10%He和90%Ar混合气流中和在Ar气流中制备的纳米Cu粒子形貌呈球形,平均粒度分别约为45和60 nm;在590 nm左右有1个很强的吸收峰;纳米Cu粒子表面Cu和O元素的摩尔比为94.88:5.12,有少量氧化亚铜和氧化铜的混合物存在,但在其表面未发现Ar和N。Nano-copper powders were prepared by flow-levitation method. The morphologies, granularities, structure and properties of nano-Cu particles were investigated by means of transmission electron microscopy, X-ray diffractometry, UV-Visible absorption spectroscopy, thermal analysis techniques and X-ray photoelectron spectroscopy. The results show that the mean granularity of almost-spherical nano-Cu particles are about 45 nm and 60 nm prepared in 10% He and 90% Ar and in At, respectively. The maximum specific absorption appears at wavelength of 590 nm. On the surface of the nano-Cu particles, the mole ratio of Cu to O is about 94.88：5.12, and there is a small amount of mixture of CuzO and CuO, but there are no elements of Ar and N in nano-Cu particles by X-ray photoelectron spectroscopy.

关 键 词：纳米铜粉 微结构 自悬浮定向流法 X射线光电子能谱 

分 类 号：TF832[冶金工程—有色金属冶金]