Pulsed wire discharge for nanosize powder synthesis

Author

Jiang, Weihua ; Yatsui, Kiyoshi

Author_Institution

Lab. of Beam Technol., Nagaoka Univ. of Technol., Niigata, Japan

Volume

26

Issue

5

fYear

1998

fDate

10/1/1998 12:00:00 AM

Firstpage

1498

Lastpage

1501

Abstract

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

Keywords

discharges (electric); nanotechnology; particle size; powder metallurgy; powder technology; pulsed power technology; 10 kA; 20 mus; 80 kJ; Al; Al₂O₃; Cu; Fe; Fe₂O₃; Mo; NiO; Pb; PbO; SnO₂; Ta₂N; TiN; TiO₂; ZrN; ZrO₂; metal wires; nanosize powder production; nanosize powder synthesis; nanotechnology; peak current; plasma materials processing applications; powder production rate; powder size; pulse length; pulsed discharge; pulsed power technologies; pulsed wire discharge; surface area measurement; Chemical processes; Ion beams; Iron; Laser beams; Optical pulses; Plasma measurements; Powders; Production; Surface discharges; Wire;

fLanguage

English

Journal_Title

Plasma Science, IEEE Transactions on

Publisher

ieee

ISSN

0093-3813

Type

jour

DOI

10.1109/27.736045

Filename

736045