Process for preparing iron carbide fine particles

Details Process for preparing iron carbide fine particles Process for preparing iron carbide fine particles

C - Chemistry, Metallurgy

01

B

C01B 31/30 (2006.01) C22C 29/06 (2006.01) G11B 5/706 (2006.01) H01F 1/11 (2006.01)

Patent

CA 2046047

Abstract of the disclosure : The present invention provides a process for preparing iron carbide fine particles having an average particle size (long axis) of 0.1 to 2 µ m and an average axial ratio of 3 to 20, which comprises, (a) optionally contacting an iron compound selected from the group consisting of iron oxyhydroxide fine particles and iron oxide fine particles with a reducing agent which does not contain carbon atom, the iron compound being, prior to the above contact, coated with iron compound or iron compound and cobalt compound, and with aluminum compound or silicon compound, and (b) contacting the iron compound of the above (a) with a reducing-and-carburizing agent containing carbon atom or a mixture thereof with a reducing agent which does not contain carbon atom.

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