Enhancement of energy deposition in pulsed wire discharge for synthesis of nanosized powders

被引：59

作者：

Cho, CY ^{[1
]}

Murai, K ^{[1
]}

Suzuki, T ^{[1
]}

Suematsu, H ^{[1
]}

Jiang, WH ^{[1
]}

Yatsui, K ^{[1
]}

机构：

[1] Nagaoka Univ Technol, Extreme Energy Dens Res Inst, Nagaoka, Niigata 9402188, Japan

来源：

IEEE TRANSACTIONS ON PLASMA SCIENCE | 2004年 / 32卷 / 05期

关键词：

energy deposition; nanosized powders; particle size distribution; pulsed wire discharge; submicron-sized particles;

D O I：

10.1109/TPS.2004.835476

中图分类号：

O35 [流体力学]; O53 [等离子体物理学];

学科分类号：

070204 ; 080103 ; 080704 ;

摘要：

Nanosized particles, less than 100 nut in diameter, have been successfully synthesized by pulsed wire discharge (PWD). The powders prepared by PWD contained submicron-sized particles, in the range of 0.1 mum-1 mum in diameter. The existence of submicron-sized particles is attributed to liquid droplets due to lower energy deposition in the wire than vaporization energy of the whole wire. The effect of the energy deposition on particle size distribution was investigated with the copper powders prepared in the atmospheric gas of nitrogen. The energies deposited in the wire were estimated by measuring the currents and voltages for various discharge conditions. Under the conditions of high atmospheric pressure and fast-current rise, the energy deposition was significantly enhanced. The energy deposition mainly affects the quantity of submicron-sized particles that originates from unvaporized liquid droplets rather than the average particle size of nanosized powders.

引用

页码：2062 / 2067

页数：6

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