The effects of Process Parameters on Synthesis of Aluminum Nanoparticles Produced by Electromagnetic Levitational Melting Gas Condensation Method under Helium atmosphere

As high purity Aluminum nanoparticles are widely used and attracted as fillers, active media, explosives, chemically active materials, absorbents, chemical analysis, decorative and reflective materials, a novel Electromagnetic Levitation Gas Condensation (ELMGC) method was applied to synthesis Aluminum nanoparticles. In this study high purity helium was applied as carrier gas and cooling media. Hexan was used to collect the nanoparticles in a noble environment as a liquid media. A suitable conical cylinder coil made of copper rod was used to levitate, melt and vaporize the sample. In this process, the Aluminum vapours ascending from the high temperature levitated droplet were condensed by a helium gas stream under atmospheric pressure .The effects of input power, gas flow rate were investigated. Finally the obtained nano Aluminum particles were analysed by scanning electron microscopy (SEM ) and X-ray Diffraction (XRD).The spherical Aluminum nanoparticles with average particle size 26.4nm and a narrow size distribution were synthesized by helium flow rate 15 lit/min at constant temperature of 1683 0K. It was found that increasing gas flow rate and sample temperature would result in smaller particle size.

کلیدواژه ها:

Aluminium ، Electromagnetic Levitation ، Gas condensation ، Nanoparticles