Method for producing magnetic particle

Abstract

A method for producing a magnetic particle forming a magnetic material for absorbing electromagnetic waves comprises the steps of mixing an organometallic complex or a metal salt with a chain polymer and dissolving the mixture in a solvent (step S 1 ); raising the temperature of the mixture to reaction temperature (step S 2 ), carrying out a reaction at the reaction temperature (step S 3 ); and forming the magnetic particle having a structure that the periphery of each fine particle formed from the organometallic complex or the metal salt is surrounded by the chain polymer and recovering the formed magnetic particle after the reaction (step S 4 ). The magnetic particle has a nanogranular structure to become a magnetic material for absorbing electromagnetic waves. Such a magnetic particle is produced by a wet reaction. Thus, a larger amount of magnetic particle can be produced by one reaction.

1 .- 11 . (canceled) 
     
     
         12 . A method for producing a magnetic particle which has a surface surrounded by an insulating material, the method comprising:
 mixing an organometallic complex or a metal salt with a chain polymer and dissolving the mixture in a solvent;   raising the temperature of the mixture to reaction temperature;   forming the magnetic particle having a structure that a periphery of each fine particle formed from the ornanometallic complex or the metal salt at the reaction temperature is surrounded by the chain polymer; and   recovering the magnetic particle.   
     
     
         13 .- 20 . (canceled) 
     
     
         21 . The method for producing a magnetic particle according to  claim 12 , wherein the electric field is applied to the mixture while forming the magnetic particle. 
     
     
         22 . The method for producing a magnetic particle according to  claim 12 , wherein the electric field is altered in order to adjust the particle size.