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Title:
COMPOSITE MAGNETIC MATERIAL, ITS MANUFACTURING METHOD, AND ELECTROMAGNETIC INTERFERENCE SUPPRESSOR USING IT
Document Type and Number:
Japanese Patent JP3839971
Kind Code:
B2
Abstract:

PROBLEM TO BE SOLVED: To prevent mechanical properties from being thermally affected greatly and to improve heat resistance, aging resistance, and oil resistance properties by including a soft magnetic material powder and a bonding agent and further including a crosslinking agent or a vulcanizing agent in a composite magnetic material and achieving heat resistance and mechanical strength.
SOLUTION: In the method, 78 pts.wt. soft magnetic powder of Fe-Al-Si alloy with an average particle diameter of 35 μm and an aspect ratio of 5 or larger and 1 pts.wt. titanate coupling treatment agent 1 are stirred by a mixer or the like to perform the coupling treatment of the soft magnetic powder in advance. Then, 20 pts.wt. chlorinated polyethylene that is a coupling agent, 79 pts.wt. soft magnetic powder where the coupling treatment is made, 0.5 pts.wt. crosslinking agent, and 0.5 pts.wt. crosslinking assistant are kneaded by a kneading machine such as a kneader to obtain a kneaded magnetic object. The obtained kneaded magnetic object is passed between parallel rolls and is rolled into a sheet shape, the sheet-shaped kneaded magnetic object sheet is heated at 190°C for three minutes for crosslinking reaction, thus obtaining a composite magnetic material with heat resistance, mechanical strength, aging resistance, and rubber elasticity properties.


Inventors:
Yoshio Awakura
Norihiko Ono
Application Number:
JP25625898A
Publication Date:
November 01, 2006
Filing Date:
September 10, 1998
Export Citation:
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Assignee:
NEC TOKIN CORPORATION
International Classes:
H05K9/00; H01Q17/00; (IPC1-7): H05K9/00; H01Q17/00
Domestic Patent References:
JP10097912A
JP10093285A
JP6120686A
JP10107541A
JP10027986A
JP4038900A
JP7033883A
JP2062230A
Attorney, Agent or Firm:
Kenho Ikeda
Shuichi Fukuda
Keisuke Yamamoto