(1. 中南大學(xué) 冶金科學(xué)與工程學(xué)院，長沙 410083；
2. 長沙職工大學(xué)，長沙 410008；
3. 四川大學(xué) 原子與分子物理研究所，成都 610065)
摘 要: 采用自懸浮定向流法制備納米Cu粉；用透射電鏡、X射線衍射、紫外?可見光吸收光譜、差示掃描量熱?熱重法和X射線光電子能譜分析對納米Cu微晶的形貌、粒度、結(jié)構(gòu)和性能進行研究。研究結(jié)果表明：在體積分數(shù)為10% He和90% Ar混合氣流中和在Ar氣流中制備的納米Cu粒子形貌呈球形，平均粒度分別約為45和60 nm；在590 nm左右有1個很強的吸收峰；納米Cu粒子表面Cu和O元素的摩爾比為94.88?5.12，有少量氧化亞銅和氧化銅的混合物存在，但在其表面未發(fā)現(xiàn)Ar和N。
關(guān)鍵字: 納米銅粉；微結(jié)構(gòu)；自懸浮定向流法；X射線光電子能譜
nano-copper powders prepared by
flow-levitation method
（1. School of Metallurgical Science and Engineering, Central South University,
Changsha 410083, China;
2. Changsha Workers College, Changsha 410008, China;
3. Institute of Atomic and Molecular Physics, Sichuan University, Chengdu 610065, China）
Abstract: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 Ar, 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 Cu2O and CuO, but there are no elements of Ar and N in nano-Cu particles by X-ray photoelectron spectroscopy.
Key words: nano Cu powders; microstructure; flow-levitation method; X-ray photoelectron spectroscopy
