J Mater Sci Technol ›› 2010, Vol. 26 ›› Issue (4): 367-370.

• Regular Papers • Previous Articles     Next Articles

Enhanced Oxidation Resistance of Iron Nanoparticles via Surface Modification in Chemical Vapor Condensation Process

Dong-Won Lee, Ji-Hun Yu, Taesuk Jang, Byoung-Kee Kim   

  1. 1) Korea Institute of Materials Science, Changwon, 641-831, Korea
    2) Department of Electronic Materials, Sunmoon University, Asan, 336-708, Korea
  • Received:2008-03-27 Revised:2010-04-28 Online:2010-04-30 Published:2010-04-28
  • Supported by:

    the National Core Research Center Program from the Ministry of Science & Technology
    the Korea Science & Engineering Foundation (R15-2006-022-03001-0)

Abstract:

In order to prevent the oxide formation on the surface of nano-size iron particles and thereby to improve the oxidation resistance in ordinary condition, iron nanoparticles synthesized by a chemical vapor condensation method were directly soaked in hexadecanethiol solution to coat them with a polymer layer. Oxygen content in the polymer-coated iron nanoparticles was significantly lower than that in usual air-passivated particles possessing iron-core/oxide-shell structure. Accordingly, oxidation resistance of the polymer-coated particles at an elevated temperature below 130°C in air was 10-40 times higher than that of the normally passivated particles.

Key words: Powder technology, Nano materials, Iron, Chemical vapor condensation