An Investigation on Production of Silver Nanopowder by Electromagnetic Levitation Melting Method

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Malekzadeh, Mahdieh | 2010

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Type of Document: M.Sc. Thesis
Language: Farsi
Document No: 41155 (07)
University: Sharif University of Technology
Department: Materials Science and Engineering
Advisor(s): Halali, Mohammad
Abstract:
Electromagnetic levitation gas condensation (ELGC) method was used to synthesize silver nanoparticles. Silver droplets were melted and levitated stably at about 1130 °C with appropriate flat coils in a 10 mm OD silica tube. High purity argon, nitrogen and helium were employed as carrier gases and cooling media. Morphology and particle size of the products were investigated by scanning and transmission electron microscopy (SEM and TEM), X-ray diffraction (XRD) energy dispersive X-ray analysis (EDAX) and dynamic light scattering (DLS). The DLS, SEM and TEM studies demonstrated narrow size distribution of spherical shape Ag nanoparticles with particle size of about 60, 45 and 35 nm synthesized under Ar, N2 and He atmospheres, respectively
Keywords:
Electromagnetic Levitation ; Nanopowder ; Silver ; Gasphase Condensation

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