METHOD FOR MANUFACTURING MAGNETIC POWDER, MAGNETIC FIELD-AMPLIFYING MAGNETIC MATERIAL, AND ULTRA HIGH FREQUENCY-ABSORBING MAGNETIC MATERIAL

WIPO Patent Application WO/2023/090220

A1

Provided are: a magnetic powder having outstanding high-frequency characteristics and having low iron loss and outstanding efficiency even when subjected to high frequency waves; a method for manufacturing a magnetic powder having outstanding high-frequency characteristics, and having low deterioration due to eddy currents and outstanding absorption characteristics even when exposed to ultra high frequency waves; a magnetic field-amplifying magnetic material having high frequency magnetic field-amplifying characteristics; and an ultra high frequency-absorbing magnetic material. The present invention relates to a method for manufacturing a magnetic powder, said method including a phosphorus treatment step for obtaining a phosphorus compound and a rare earth-iron-nitrogen magnetic powder by adding an inorganic acid to a slurry containing: a rare-earth-iron-nitrogen magnetic powder that contains R (where R is at least one selected from Y, Ce, Pr, Nd, Gd, Tb, Dy, Ho, Er, Tm, Lu, and Sm; and, if Sm is included, Sm accounts for less than 50 atomic% of the R component as a whole), Fe, and N; water; and a phosphorus-containing substance. The present invention also relates to an ultra high frequency-absorbing magnetic material and a magnetic field-amplifying magnetic material containing a phosphorus compound and a rare earth-iron-nitrogen magnetic powder.

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AKAMATSU JUN (JP)
ABE SATOSHI (JP)
ABE MASAHIRO (JP)
IWAI KENTA (JP)
YAMANAKA SATOSHI (JP)
TADA SHUICHI (JP)
IMAOKA NOBUYOSHI (JP)

PCT/JP2022/041715

May 25, 2023

November 09, 2022

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NICHIA CORP (JP)

B22F1/16; B22F1/00; B22F1/14; B22F3/00; C22C38/00; C23C22/07; H01F1/059; H01F1/06; H01F1/08

WO2008136391A1

2008-11-13

JP2020036044A	2020-03-05
JP2019036667A	2019-03-07
JP2006269937A	2006-10-05
JP2021105192A	2021-07-26
JP5071160B2	2012-11-14

WISEPLUS IP FIRM (JP)

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