| 摘要 |
PROBLEM TO BE SOLVED: To provide fine composite iron powder suitable for use in a method of rapidly decomposing an organic halogen compound; composite magnetic iron powder which exhibits its function in a high frequency zone and is free from oxidation and heat generation even in the air; a production method therefor; and a wave absorber using the same. SOLUTION: The magnetite-iron composite powder contains magnetite and has an average primary grain size of 0.01-10μm, wherein the intensity ratio of X-ray diffraction of the magnetite toα-Fe is preferably 0.001-50, and the magnetite-iron composite powder preferably contains nickel. In the production method for the iron composite powder, when hematite powder having an average primary grain size of 0.01-10μm is heated and reduced in a reducing gas, the reduction of the hematite powder is suspended and magnetite is incorporated into the powder. The iron composite powder is mixed with rubber and/or resin and molded. COPYRIGHT: (C)2005,JPO&NCIPI
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