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Pulsed wire discharge for nanosize powder synthesis

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2 Author(s)
Weihua Jiang ; Lab. of Beam Technol., Nagaoka Univ. of Technol., Niigata, Japan ; Yatsui, K.

The pulsed wire discharge, as one of the well-developed pulsed power technologies, has been successfully applied to nanosize powder production. In the demonstration experiments, the discharge was carried out with the peak current of ~10 kA, the pulse length of ~20 μs, and the pulse energy of ~80 J. Nanosize powders of metals (Al, Fe, Cu, Mo, and Pb), metal oxides (Al2O3, TiO2, Fe 2O3, NiO, ZrO2, SnO2, and PbO), and metal nitrides (TiN, ZrN, Ta2N) have been synthesized by pulsed discharge of metal wires in argon, oxygen, or nitrogen. The typical powder production rate was ~5 mg/pulse. The results of surface-area measurement have given the average powder sizes in the range of 20~70 nm, depending on the material of the powder

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Plasma Science, IEEE Transactions on  (Volume:26 ,  Issue: 5 )