直流电弧等离子体蒸发法制备超细锌粉  

Preparation of ultrafine zinc powders by DC arc plasma evaporation method

作　　者：王鹏[1] 赵芳霞[1] 张振忠[1] 

机构地区：[1]南京工业大学材料科学与工程学院,南京210009

出　　处：《中国有色金属学报》2011年第9期2236-2241,共6页The Chinese Journal of Nonferrous Metals

基　　金：江苏省科技厅社会发展计划资助项目(BS2007120);国家中小型企业创新基金资助项目(08026213700982)

摘　　要：采用自行研制的高真空三枪直流电弧等离子体蒸发金属纳米粉体连续制备设备,通过控制阴极电流大小制备不同粒径的超细锌粉。利用X射线衍射(XRD)、X射线荧光分析(XRF)、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晶体结构、成分、形貌和粒径分布进行表征。结果表明:等离子体法制备的超细锌粉纯度(质量分数)高达99.945%,粒径分布窄,分散性好,颗粒以球状为主,夹杂少量六方形态;超细锌粉的晶体结构与块体材料相同,为六方结构,晶格常数略有收缩;当其他参数恒定,工作电流从150 A增加到300 A时,超细锌粉的平均粒径从165 nm增加到596 nm,产率从2 258.55 g/h提高到7 027.20 g/h。The various particle sized ultrafine zinc powders were prepared by controlling the cathode current of self-designed fabricated high-vacuum three-electrode DC arc plasma production apparatus.The crystalline structure,chemical composition,morphology,and particle size distribution of the samples were characterized by X-ray diffraction（XRD）,X-ray fluorescence analysis（XRF）,transmission electron microscopy（TEM）,selected area electron diffraction（SAED） and simple PCI software.The results indicate that the prepared ultrafine zinc powders have uniform size,high purity（mass fraction） of 99.945%,narrow size distribution,spherical mainly and some hexagonal shape,and the crystal structure of the samples is the same as that of the bulk materials,hexagonal crystal structure,a slight Shrinkage in the lattice parameter.The average diameters and productivity of ultrafine zinc powders increase from 165 nm to 596 nm and from 2 258.55 g/h to 7 027.20 g/h,respectively,when the current is raised from 150A to 300A with other parameters constant.

关 键 词：超细锌粉 直流电弧等离子体蒸发 微观结构 

分 类 号：TG146.1[一般工业技术—材料科学与工程]