Title:
METHOD FOR PREPARING MAGNETIC POWDER AND MAGNETIC POWDER
Document Type and Number:
WIPO Patent Application WO/2020/045865
Kind Code:
A1
Abstract:
The present invention relates to a method for preparing magnetic powder and magnetic power. A method for preparing magnetic powder according to an embodiment of the present invention comprises the steps of: preparing iron powder by means of reduction reaction of iron oxide; preparing magnetic powder by means of a molded body which is formed by pressure molding a mixture comprising the iron powder, rare earth oxide, boron and calcium at a pressure of 22MPa or higher; and coating the surface of the magnetic powder with ammonium fluoride.
Inventors:
KIM IN GYU (KR)
KWON SOON JAE (KR)
CHOI IK JIN (KR)
UH HYOUNSOO (KR)
KWON SOON JAE (KR)
CHOI IK JIN (KR)
UH HYOUNSOO (KR)
Application Number:
PCT/KR2019/010375
Publication Date:
March 05, 2020
Filing Date:
August 14, 2019
Export Citation:
Assignee:
LG CHEMICAL LTD (KR)
International Classes:
B22F9/20; B22F1/16; B22F3/14; H01F1/057
Foreign References:
| JPH04247813A | 1992-09-03 | |||
| KR20180051224A | 2018-05-16 | |||
| KR20140082741A | 2014-07-02 | |||
| JPH0372011A | 1991-03-27 | |||
| KR20150033423A | 2015-04-01 |
Other References:
See also references of EP 3650148A4
Attorney, Agent or Firm:
YOU ME PATENT AND LAW FIRM (KR)
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