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Title:
BONDING MAGNET HAVING EXCELLENT MAGNETIC CHARACTERISTIC AND MANUFACTURE THEREOF
Document Type and Number:
Japanese Patent JPS6041203
Kind Code:
A
Abstract:

PURPOSE: To obtain a bonding magnet which assures grain orientation being convenient for magnetization pattern of multipole magnetization.

CONSTITUTION: About 90wt% of strontium ferrite magnetic powder with average longer diameter of 1W10μm (desirably 2W4μm) and a thickness to longer diameter ratio of about 0.25W0.9 and about 10wt% of EVA resin are kneaded under a temperature of about 150°C. This kneaded material is cracked into pellet. The material is then heated up to about 150°C with an extruder with auger diameter of about 50mm. Thereby the material is molded into a round bar in diameter of about 10.5mm. Owing to this manufacturing method, anisotropic characteristic can be enhanced at the area near the surface of molded material but weakened at the center thereof and moreover the magnetic characteristic can also be improved.


Inventors:
IWATA MASAO
Application Number:
JP8896383A
Publication Date:
March 04, 1985
Filing Date:
May 20, 1983
Export Citation:
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Assignee:
HITACHI METALS LTD
International Classes:
H01F1/113; H01F41/02; (IPC1-7): H01F41/02



 
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