Preparation and characterization of Ni nanopowders prepared by anodic arc plasma

作者：Wei ZQ^*; Qiao HX; Dai JF; Feng WJ; Wang Q; Li WX; Yan PX

来源：Transactions of Nonferrous Metals Society of China, 2005, 15(1): 51-56.

• anodic are plasma
• Ni nanopowders
• particle size
• structure
• composition

Ni nanopowders were successfully prepared in large quantities by anodic arc discharged plasma method with homemade experimental apparatus in inert gas. The particle size, microstructure and morphology of the particles were characterized via X-ray diffractometry (XRD), transmission electron microscopy (TEM) and the corresponding selected area electron diffractometry(SAED). The specific surface area and pore parameters were investigated by nitrogen sorption isotherms at 77 K with Brunauer-Emmett-Teller (BET) equation and Barrett-Joyner-Halenda (BJH) method. The chemical compositions were determined by X-ray energy dispersive spectrometry (XEDS) and element analysis. The experimental results indicate that this method is convenient and effective, and the nanopowders with uniform size, higher purity, weakly agglomerated and spherical chain shape are gotten. The crystal structure of the samples is FCC structure as the bulk materials, the particle size distribution ranges from 20 to 70 nm, and the average particle size is about 46 nm obtained by TEM and confirmed by XRD and BET results. The specific surface area is 14.23 m(2)/g, specific pore volume is 0.09 cm(3)/g and average pore diameter is 23 nm.

• 出版日期2005-2
• 单位兰州理工大学; 兰州大学