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首页> 外文会议>International Symposium on Eco-Materials Processing amp; Design; 20060108-11; Chengdu(CN) >Characterization of Ni Nanopowders Produced by Electrical Explosion of Wire Technique
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Characterization of Ni Nanopowders Produced by Electrical Explosion of Wire Technique

机译：线材电爆炸生产的镍纳米粉的表征

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摘要

Nanosize nickel powders were successfully produced by electrical explosion of wire (EEW). In EEW, the nickel wire was discharged in a chamber filled with nitrogen or argon gas, and the produced powders were subsequently stabilized by air-passivation at room temperature for 2 h. X-ray diffraction only showed the nickel phase of FCC crystal structure, whereas TEM and XPS analyses showed the formation of a very thin oxide layer of NiO on the surface of particles. Particles were spherical in shape, and the mean particle size calculated by specific surface area was about 100 nm. The particle size decreased with increasing charging voltage and with increasing ambient gas pressure. Argon gas was more effective in producing finer particles than nitrogen gas.
机译：纳米镍粉是通过电线的电爆炸（EEW）成功生产的。在EEW中，将镍丝放到充满氮气或氩气的室内，然后通过在室温下进行空气钝化2h使生成的粉末稳定。 X射线衍射仅显示FCC晶体结构的镍相，而TEM和XPS分析显示在颗粒表面形成非常薄的NiO氧化物层。颗粒为球形，通过比表面积计算的平均粒径为约100nm。随着充电电压的增加和环境气压的增加，粒径减小。氩气比氮气更有效地产生更细的颗粒。

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