【摘要】 约束弧等离子体电弧法用等离子体高温热源激发高能粒子的化学反应,并与骤冷技术结合构成一个制备金属纳米粉体或化合物纳米粉末材料的等离子体过程,能极好地制备高溶点(例:Ni,Fe,C等)或低溶点(例:Al,Zn等)的纳米粉末,是当前极具工业化生产应用前景的方法之一。用约束弧等离子体电弧法制备了纳米Zn粉末,用XRD,TEM,TG,DTA技术研究了纳米Zn粉末的结构、晶粒大小、晶粒形貌和热稳定性。结果表明,该粉体平均粒径小于42 nm,晶粒形貌为带状,热稳定性好。此外该粉体具有高比表面积,可用作化学反应的催化剂。更多还原

【Abstract】 Bound arc discharging plasma method,excited high-energy particles in chemical reactions by high-temperature plasma source,and combined with quenching technology to form a plasma process for preparation of metal or compounds nano-particles,can extremely well prepare the high melting point(example: Ni,Fe,C,etc.) or low melting point(example: Al,Zn,etc.) nano-powders,is currently a very promising industrial production methods.Nano-powders of Zn were prepared with the bound arc discharging plasma method.The typical structure,particle size,morphology and heat stability of the nano-powders were investigated by XRD,TEM,TG and DTA technologies.The results show that the nano-powders of Zn are nano-sized with the particle size of 42 nm,have band morphology,heat stability.In addition,the nano-powders of Zn can be used as the material in the chemical promoter for its novel character of heat stability and high specific surface area.更多还原