采用自悬浮定向流法制备高纯度镍粉，并采用TEM和XRD分别对粉体的粒径分布和物相进行了表征，结果表明制得镍粉纯度较高，其形貌呈圆球型。负载电压、冷却介质及循环气流均对纳米颗粒的形貌有明显的影响。通过对比分析发现，使用Ar气为冷却介质，气流1．4m3／h，电压K=5．5kV时制备的纳米粉颗粒尺寸分布符合正态分布规律，其产量也最高。
Nickel nanocrystal powder was synthesized adopted flow-levitation method. The analysis indicated that the grain size of the powder was mainly composed of nickel and shape of the ball. The grain size of nickel pow- der was studied by means of TEM and XRD. Further research found that nanoparticles shape was obvious influ- enced by load voltage, cooling medium, and circulation-air. The result of XRD and TEM make known, the best choice of preparation of nickel powder was using medium of Ar, the speed of gas was 1.4m3/h, and the voltage was 5.5kV.
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