Tuesday, July 08, 2008

US Patent 7396502 - Apparatus for making polymer coated Fe nanopowder


Magnetic nanopowder is useful to applications such as high density data storage and high sensitivity magnetic sensors. This patent from the Korea Institute of Machinery and Materials teaches an apparatus for forming Fe nanopowder with a protective polymer coating that prevents oxidation. Claim 1 reads:

1. A system of producing nano-sized Fe powder having a polymer coated layer on a surface thereof, comprising:

a means for gasifying an Fe-containing liquid precursor;

a means for separating nano-sized Fe-particles from the gasified Fe-containing precursor to present Fe as an outermost layer; and

a means for injecting the separated nano-sized Fe particles into a polymer solution to produce the nano-sized Fe powder having a polymer coated layer.