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Title: Pulsed wire discharge apparatus for mass production of copper nanopowders

Abstract

A pulsed wire discharge (PWD) apparatus for the mass production of nanopowders has been developed. The apparatus has a continuous wire feeder, which is operated in synchronization with a discharging circuit. The apparatus is designed for operation at a maximum repetition rate of 1.4 Hz at a stored energy of 160 J. In the present study, Cu nanopowder was synthesized using the PWD apparatus and the performance of the apparatus was examined. Cu nanopowder of 2.0 g quantity was prepared in N{sub 2} gas at 100 kPa for 90 s. The particle size distribution of the Cu nanopowder was analyzed by transmission electron microscopy and the mean surface diameter was determined to be 65 nm. The ratio of the production mass of the powder to input energy was 362 g/kW h.

Authors:
; ; ; ; ; ; ; ; ;  [1];  [2];  [2]
  1. Extreme Energy-Density Research Institute, Nagaoka University of Technology, Nagaoka 940-2188 (Japan)
  2. (Japan)
Publication Date:
OSTI Identifier:
20953461
Resource Type:
Journal Article
Resource Relation:
Journal Name: Review of Scientific Instruments; Journal Volume: 78; Journal Issue: 5; Other Information: DOI: 10.1063/1.2721419; (c) 2007 American Institute of Physics; Country of input: International Atomic Energy Agency (IAEA)
Country of Publication:
United States
Language:
English
Subject:
36 MATERIALS SCIENCE; COPPER; DISTRIBUTION; ELECTRIC DISCHARGES; EQUIPMENT; NANOSTRUCTURES; PARTICLE SIZE; PARTICLES; PERFORMANCE; STORED ENERGY; SYNCHRONIZATION; TRANSMISSION ELECTRON MICROSCOPY

Citation Formats

Suematsu, H., Nishimura, S., Murai, K., Hayashi, Y., Suzuki, T., Nakayama, T., Jiang, W., Yamazaki, A., Seki, K., Niihara, K., Nagaoka Kakouki, 2-5-46 Tekkou, Nagaoka, Niigata 940-2022, and Extreme Energy-Density Research Institute, Nagaoka University of Technology, Nagaoka 940-2188. Pulsed wire discharge apparatus for mass production of copper nanopowders. United States: N. p., 2007. Web. doi:10.1063/1.2721419.
Suematsu, H., Nishimura, S., Murai, K., Hayashi, Y., Suzuki, T., Nakayama, T., Jiang, W., Yamazaki, A., Seki, K., Niihara, K., Nagaoka Kakouki, 2-5-46 Tekkou, Nagaoka, Niigata 940-2022, & Extreme Energy-Density Research Institute, Nagaoka University of Technology, Nagaoka 940-2188. Pulsed wire discharge apparatus for mass production of copper nanopowders. United States. doi:10.1063/1.2721419.
Suematsu, H., Nishimura, S., Murai, K., Hayashi, Y., Suzuki, T., Nakayama, T., Jiang, W., Yamazaki, A., Seki, K., Niihara, K., Nagaoka Kakouki, 2-5-46 Tekkou, Nagaoka, Niigata 940-2022, and Extreme Energy-Density Research Institute, Nagaoka University of Technology, Nagaoka 940-2188. Tue . "Pulsed wire discharge apparatus for mass production of copper nanopowders". United States. doi:10.1063/1.2721419.
@article{osti_20953461,
title = {Pulsed wire discharge apparatus for mass production of copper nanopowders},
author = {Suematsu, H. and Nishimura, S. and Murai, K. and Hayashi, Y. and Suzuki, T. and Nakayama, T. and Jiang, W. and Yamazaki, A. and Seki, K. and Niihara, K. and Nagaoka Kakouki, 2-5-46 Tekkou, Nagaoka, Niigata 940-2022 and Extreme Energy-Density Research Institute, Nagaoka University of Technology, Nagaoka 940-2188},
abstractNote = {A pulsed wire discharge (PWD) apparatus for the mass production of nanopowders has been developed. The apparatus has a continuous wire feeder, which is operated in synchronization with a discharging circuit. The apparatus is designed for operation at a maximum repetition rate of 1.4 Hz at a stored energy of 160 J. In the present study, Cu nanopowder was synthesized using the PWD apparatus and the performance of the apparatus was examined. Cu nanopowder of 2.0 g quantity was prepared in N{sub 2} gas at 100 kPa for 90 s. The particle size distribution of the Cu nanopowder was analyzed by transmission electron microscopy and the mean surface diameter was determined to be 65 nm. The ratio of the production mass of the powder to input energy was 362 g/kW h.},
doi = {10.1063/1.2721419},
journal = {Review of Scientific Instruments},
number = 5,
volume = 78,
place = {United States},
year = {Tue May 15 00:00:00 EDT 2007},
month = {Tue May 15 00:00:00 EDT 2007}
}
  • Highlights: • Sn-based nanoparticles are fabricated by using the pulsed wire evaporation method. • The electrodes are prepared by mixing the graphene and coating the surface. • Coating the surface of electrode is used with brushing of simple and facile method. • The electrochemical measurements are performed with galvanostatic experiments. • The coating electrode maintains capacity nearly of 501 mAh g{sup −1} up to 100 cycles. - Abstract: Sn-based nanoparticles are prepared with the O{sub 2} concentrations in chamber of Ar atmosphere (by v/v) by using the pulsed wire evaporation (PWE) method. The prepared electrodes are only Sn-based powder electrode,more » its binder coating electrode and Sn-based powder/graphene nanocomposite electrode. Morphology and structure of the synthesized powders and electrodes are investigated with a field emission scanning electron microscope (FE-SEM) and an X-ray diffraction (XRD) analysis. The electrochemical measurements were performed with galvanostatic cycling experiments using a coin type cell of CR2032 (Ø20, T3.2 mm). The binder coating electrode is superior to others and maintains delithiation capacity nearly of 501 mAh g{sup −1} as 58.3% of first delithiation capacity at 0.2 C-rate up to 100 cycles.« less
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  • The method of resonance absorption of the 510.6 nm line was used to determine the density n/sub m/ of the 4s/sup 2/ /sup 2/D/sub 5//sub ///sub 2/ metastable level of the copper atoms during the interpulse periods of a Cu laser, in the neon buffer gas pressure range of 10--50 kPa. At pressures exceeding 10 kPa an increase in n/sub m/ was observed (following rapid decay) over a period 5--10 ..mu..sec after the current pulse. A numerical solution of the problem of relaxation of the plasma parameters showed that the complex nature of the variation in n/sub m/ can bemore » explained by a combination of a number of processes including recovery of the concentration of the copper atoms in the ground state and relaxation of the temperature and density of the electrons.« less
  • Discharge-heated radiation-cooled operation of a copper vapor laser (CVL) using copper chloride and copper iodide as the lasant has been maintained for periods of over an hour. Maximum power was over 4 W and system efficiency over 0.3%. Discharge tube temperature of up to 800/sup 0/C and beam-size reduction to less than half the tube inside diameter (ID) have also been observed.
  • No abstract prepared.