Preparation of Coated Metal Nanosized Powders by Pulsed Wire Discharge

Abstract

Copper nanosized powder covered by an organic film was prepared by pulsed wire discharge. Thin metallic Cu wire was discharged in a chamber filled with organic fumes and N₂ gas at 100 Torr. Nanosized powder was collected by evacuating the chamber through a filter. X-ray and electron diffraction patterns indicate that the main phase in the powder was Cu and was not oxidized for 3 months in air. From energy dispersive X-ray analysis results, a Cu particle was covered by an organic film, which may suppress the oxidation of the powder.