PARTICLE SIZE AND MICROSTRUCTURE OF Ni NANOPOWDERS PREPARED BY ANODIC ARC PLASMA
来源期刊：Acta Metallurgica Sinica2005年第3期
论文作者：H.X. Qiao Z.Q. Wei W.J. Feng Q.Wang J.F. Dai P.X. Yan
Key words：anodic arc plasma; Ni nanopowder; particle size; structure; composition;
Abstract: Pure Ni nanopowders were successfully prepared by the method of anodic arc discharged plasma with homemade experimental apparatus. The particle size, mircostructure and morphology of the particles by this process were characterized via X-ray powder diffraction(XRD), transmission electron microscopy (TEM) and the corresponding selected area electron dtffraction (SAED); The specific surface area and pore parameters were investigated by multi-point full analysis of nitrogen adsorption-desorption isotherms at 77K by BrunauerEmmett-Teller (BET) surface area analyzer; The chemical composition were determined by X-ray energy dispersive spectrometry (XEDS) equipped in SEM and element analyze instrument. The experiment results indicate that the samples by this method with high purity, the crystal structure of the particles is as same as the bulk material, is fcc structure, with average particle sizes about 47nm, ranging from 20 to 70nm, and distributed uniformly inspherical chain shapes, the specific surface areavis 14.23m2/g, pore volume of pore is 0.09cm3/g and average pore diameter is 23nm.
H.X. Qiao1，Z.Q. Wei2，W.J. Feng2，Q.Wang2，J.F. Dai2，P.X. Yan3
(1.College of Civil Engineering, Lanzhou University of Technology, Lanzhou 730050, China;
2.School of Sciences, Lanzhou University of Technology, Lanzhou 730050, China;
3.School of Physical Science and Technology, Lanzhou University, Lanzhou 730000, China)
Abstract:Pure Ni nanopowders were successfully prepared by the method of anodic arc discharged plasma with homemade experimental apparatus. The particle size, mircostructure and morphology of the particles by this process were characterized via X-ray powder diffraction(XRD), transmission electron microscopy (TEM) and the corresponding selected area electron dtffraction (SAED); The specific surface area and pore parameters were investigated by multi-point full analysis of nitrogen adsorption-desorption isotherms at 77K by BrunauerEmmett-Teller (BET) surface area analyzer; The chemical composition were determined by X-ray energy dispersive spectrometry (XEDS) equipped in SEM and element analyze instrument. The experiment results indicate that the samples by this method with high purity, the crystal structure of the particles is as same as the bulk material, is fcc structure, with average particle sizes about 47nm, ranging from 20 to 70nm, and distributed uniformly inspherical chain shapes, the specific surface areavis 14.23m2/g, pore volume of pore is 0.09cm3/g and average pore diameter is 23nm.
Key words:anodic arc plasma; Ni nanopowder; particle size; structure; composition;
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