Login| Sign Up| Help| Contact|

Patent Searching and Data


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 (4-14-1, Sotokanda, Chiyoda-k, Tokyo 21, 〒1010021, JP)
YOSHIDA Takayuki (4-14-1, Sotokanda, Chiyoda-k, Tokyo 21, 〒1010021, JP)
Application Number:
JP2015/059622
Publication Date:
October 08, 2015
Filing Date:
March 27, 2015
Export Citation:
Click for automatic bibliography generation   Help
Assignee:
DOWA ELECTRONICS MATERIALS CO., LTD. (4-14-1, Sotokanda Chiyoda-k, Tokyo 21, 〒1010021, JP)
International Classes:
B22F1/00; B22F9/20; C22C38/00; H01F1/24; H01F1/33; H01Q7/06; H01Q13/24
Foreign References:
JP2013236021A2013-11-21
Attorney, Agent or Firm:
KOMATSU Takashi (Bakuro-cho TY BLDG. 7F, 2-2-12 Nihonbashibakuro-cho, Chuo-k, Tokyo 02, 〒1030002, JP)
Download PDF: