直流电弧等离子体法制备铋纳米粉体-中国有色金属学报.PDF

第 19 卷第 2 期 中国有色金属学报 2009 年 2 月 Vol.19 No.2 The Chinese Journal of Nonferrous Metals Feb. 2009 文章编号：1004-0609(2009)02-0334-05 直流电弧等离子体法制备铋纳米粉体 杨江海，张振忠，赵芳霞，王 超，安少华 (南京工业大学 材料科学与工程学院，南京 210009) 摘 要：采用自行研制的高真空三枪直流电弧金属纳米粉体连续制备设备，通过控制充气压力制备不同粒径的纳 米铋粉。利用 X 射线衍射(XRD)、透射电子显微镜(TEM)和相应的选区电子衍射(SAED) 以及Simple PCI 软件等测 试手段对样品的成分、晶体结构、形貌和粒径分布进行表征。结果表明：等离子体法制备的纳米铋粉纯度高，粒 径分布窄，分散性好，颗粒呈链球状均匀分布；纳米粉体的晶体结构与块体材料相同，为六方结构、空间群 R-3m ， 晶格常数略有增大；当电流恒定为250 A 、充气压力从 5 kPa 增加到 60 kPa 时，纳米铋粉的平均粒径从 35 nm 增 加到 143 nm。 关键词：纳米铋粉；直流电弧等离子体；平均粒径；制备 中图分类号：TG 146.1 文献标识码： A Preparation of bismuth nanoparticles by DC arc plasma method YANG Jiang-hai, ZHANG Zhen-zhong, ZHAO Fang-xia, WANG Chao, AN Shao-hua (College of Materials Science and Engineering, Nanjing University of Technology, Nanjing 210009, China) Abstract: Bismuth nanoparticles were prepared by controlling the working pressure of self-designed fabricated high-vacuum three-electrode DC arc plasma production apparatus in argon atmosphere. The chemical composition, crystalline structure, morphology, and particle size distribution of the samples were characterized by X-ray diffractometry (XRD), transmission electron microscopy (TEM), selected area electron diffractometry (SAED) and simple PCI software. The results indicate that the prepared bismuth nanoparticles have uniform size, high purity, narrow size distribution and spherical shape, and the crystal structure of the samples is the same as that of the bulk materials, being R-3m and rhombohedral structure, a slight expansion in