直流电弧等离子体法制备铋纳米粉体

来源期刊:中国有色金属学报2009年第2期

论文作者:杨江海 张振忠 赵芳霞 王超 安少华

文章页码:334 - 338

关键词:纳米铋粉;直流电弧等离子体;平均粒径;制备

Key words:bismuth nanoparticles; DC arc plasma; average size; preparation

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。

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 the lattice parameter. The average diameters of bismuth nanoparticles increase from 35 nm to 143 nm when the working pressure is from 5 kPa to 60 kPa at constant electric current of 250 A.

基金信息:江苏省火炬计划资助项目
江苏省高校自然科学基金资助项目
国家自然科学基金资助项目

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