Development of a Continuous Wire Feeder in a Pulsed WireDischarge Apparatus for Purification of AlN Nanosized Powders

Abstract

High purity aluminum nitride powders were successfully synthesized by a pulsed wire discharge using a newly designed continuous wire feeder system. The AlN content of the powders determined by X-ray diffraction analysis was as high as 98 wt.%. The AlN content was improved by increasing the discharge energy. The specific surface area of the powder was measured to be 65.5 m²/g by Brunauer-Emmett-Teller(BET) method. The ratio of the powder weight to the discharge energy was estimated to be 46 g/kWh. The average particle size measured to be 30nm by BET analysis and SEM observatioins