FE-CO ALLOY POWDER, MANUFACTURING METHOD THEREFOR, ANTENNA, INDUCTOR, AND EMI FILTER

Title:

FE-CO ALLOY POWDER, MANUFACTURING METHOD THEREFOR, ANTENNA, INDUCTOR, AND EMI FILTER

Document Type and Number:

WIPO Patent Application WO/2015/152048

Kind Code:

A1

Abstract:

[Problem] To provide an iron-copper (Fe-Co) alloy powder that is suitable for an antenna that has a high saturation magnetization value (σs) and a controlled coercive force (Hc), thereby achieving an extremely large µ' and a sufficiently small tan δ (µ). [Solution] During formation of seed crystals by introducing an oxidant into an aqueous solution containing Fe ions and Co ions in order cause a precursor having Fe and Co as constituent elements to deposit and grow, the precursor is obtained by adding Co to the aqueous solution in an amount equivalent to 40% or more of the total amount of Co used for the deposition reaction during a period after the beginning of the seed crystal formation and before the ending of the deposition reaction, and a dried product of the precursor is then reduced in order to obtain an Fe-Co alloy powder. This Fe-Co alloy powder has an average grain size of 100nm or smaller, a coercive force (Hc) of 52.0-78.0kA/m, and a saturation magnetization value (σs) of 160Am2/kg or higher.

Inventors:

GOTOH MASAHIRO (JP)
YOSHIDA TAKAYUKI (JP)

Application Number:

PCT/JP2015/059622

Publication Date:

October 08, 2015

Filing Date:

March 27, 2015

Export Citation:

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Assignee:

DOWA ELECTRONICS MATERIALS CO (JP)

International Classes:

B22F1/054; B22F1/145; B22F9/20; C22C38/00; H01F1/24; H01F1/33; H01Q7/06; H01Q13/24

Foreign References:

JP2013236021A

2013-11-21

Other References: