摘要:采用阳极弧放电等离子体方法制备了高绝镍纳米粉、利用X 射线衍村(XRD)、透射电子显微镜(TEM)对粉末的形貌、晶体结构、粒度进行了表征，样品的 N.的吸附一脱附等温线来用静态表面吸附仪在液氨温度下 (78 K)在气体饱和蒸气压力范围内测试。依据 BIHI 理论模型计算探讨了样品的累积孔表面积、累积孔体积、孔径及其 BJH 脱附分布等性能，用图解法由等温吸附直线求出单层吸附量.利用 BET 吸附公式计算出样品的比表面积,结果表明，镍纳米粉的比表面积为1423m/g,粒径为46nm。

关键词:Ni 纳米粉;氮吸附;比表面积;孔结构

Abstract: The pure nickel nano-particles are prepared by anodic arc dis-charging plasma method. The product is characterized by X - ray diffraction(XRD), transmission electron microscopy (TEM ) fo determine lhe morphal-ogy. crystal microstruclure. parficle size and size distribution. The N: absorpfion - desorption isotherm of the samples al liquid nilrogen lemperalure(78K) and gas saturalion vapor tension range are measured by ASAP 2010static volumelric absorplion analyzer. Based on the BJH academic model, theproperyofthe cumulalive pore specific surfacearea, cumulative pore volume,average pore diameter and BJH desorption pore distributiop curves ofthe sam-ples are caleulated hy BJH analysis method. By using the absorplion isothermand illusiralion method, the single layer adsorplion capacily can be oblained.the specific surface area of the sample can be calculaled from the BET ad-sorption equalion. The resulls show that the specific surface are and the size ofnickelnano-parlicles are 14. 23 m’/g and 46 nm.

Keywords: nickel nano-particle; nitrogen absorption isotherm ; specificsurface area; pore sructure