Invention Grant
- Patent Title: Metallic magnetic powder and manufacturing method of the same, magnetic painting, magnetic powder for magnetic therapy, and magnetic recording medium
- Patent Title (中): 金属磁粉及其制造方法相同,磁性涂料,磁性粉末用于磁疗和磁记录介质
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Application No.: US13103410Application Date: 2011-05-09
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Publication No.: US08932668B2Publication Date: 2015-01-13
- Inventor: Dong Chul Pyun , Heemin Yoo , Hirohisa Omoto , Takayuki Yoshida
- Applicant: Dong Chul Pyun , Heemin Yoo , Hirohisa Omoto , Takayuki Yoshida
- Applicant Address: US AZ Tuscon JP Tokyo
- Assignee: The Arizona Board of Regents on Behalf of The University of Arizona,Materials Co., Ltd.
- Current Assignee: The Arizona Board of Regents on Behalf of The University of Arizona,Materials Co., Ltd.
- Current Assignee Address: US AZ Tuscon JP Tokyo
- Agency: Oliff PLC
- Priority: JP2010-110360 20100512
- Main IPC: B22F1/02
- IPC: B22F1/02 ; B22F1/00 ; G11B5/706

Abstract:
A metallic magnetic powder where a primary particle of each metallic magnetic particle is a powder without forming an aggregate, and a method of making the same that includes manufacturing a metallic magnetic powder constituted of metallic magnetic particles, containing a metallic magnetic phase, with Fe, or Fe and Co as main components, rare earth elements, or yttrium and one or more non-magnetic components removing the non-magnetic component from the metallic magnetic with a reducing agent, while making a complexing agent exist for forming a complex with the non-magnetic component in water; oxidizing the metallic magnetic particle with the non-magnetic component removed; substituting water adhered to the oxidized metallic magnetic particle with an organic solvent; andcoating the surface of the metallic magnetic particle with an organic matter different from the organic solvent, while maintaining a wet condition of the metallic magnetic particle with the organic solvent adhered thereto.
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