Method of manufacturing Fe nanopowders by chemical vapor condensation

Abstract

Disclosed is a method of synthesizing Fe powders having sizes of tens of nm by vaporizing an iron atom-containing liquid material with a low melting point at high temperatures, and then condensing iron atoms in decomposed Fe and CO gas by chemical vapor condensation. According to the current invention, the synthesizing method includes vaporizing iron pentacarbonyl (Fe(CO) 5 ) or iron acetate ((CH 3 CO 2 ) 2 Fe) precursor to gas by use of a ceramic bubbler of a chemical vapor condensation device, decomposing the vaporized gas to Fe in a reactor of the device while being introduced with Ar gas, and condensing the decomposed Fe in a chamber of the device, thereby obtaining the Fe powders having sizes of tens of nm.

1 . A method of manufacturing Fe nanopowders by chemical vapor condensation, comprising: 
 vaporizing a Fe-containing liquid precursor to gas, to obtain a vaporized gas;    decomposing the vaporized gas to Fe while being introduced with an inert gas, to obtain decomposed Fe; and    condensing the decomposed Fe, to obtain Fe nanopowders.    
     
     
         2 . The method as defined in  claim 1 , wherein the liquid precursor comprises iron pentacarbonyl (Fe(CO) 5 ), or iron acetate ((CH 3 CO 2 ) 2 Fe).  
     
     
         3 . The method as defined in  claim 1 , wherein the decomposing of the vaporized gas is performed at 400 to 800° C.  
     
     
         4 . The method as defined in  claim 1 , wherein the condensing of the decomposed Fe further comprises feeding oxygen to coat each surface of the Fe nanopowders with an oxide layer.