公开(公告)号：EP4438201A1

公开(公告)日：2024-10-02

申请号：EP22895502.7

申请日：2022-11-09

申请人： Nichia Corporation

发明人： AKAMATSU, Jun ,  ABE, Satoshi ,  ABE, Masahiro ,  IWAI, Kenta ,  YAMANAKA, Satoshi ,  TADA, Shuichi ,  IMAOKA, Nobuyoshi

IPC分类号： B22F1/16 ,  B22F1/00 ,  B22F1/14 ,  B22F3/00 ,  C22C38/00 ,  C23C22/07 ,  H01F1/059 ,  H01F1/06 ,  H01F1/08

CPC分类号： B22F1/00 ,  B22F1/14 ,  B22F1/16 ,  B22F3/00 ,  H01F1/059 ,  H01F1/06 ,  H01F1/08 ,  C22C38/00 ,  C23C22/07

摘要： Provided are a magnetic powder having good high-frequency characteristics with low iron loss and good efficiency even at high frequencies, a method of producing a magnetic powder having good high-frequency characteristics with small degradation due to eddy currents and good absorption characteristics even at hyper-high frequencies, a magnetic material for magnetic field amplification having magnetic field amplification characteristics at high frequencies, and a magnetic material for hyper-high frequency absorption. Included is a method of producing a magnetic powder which includes performing a phosphorus treatment to obtain a phosphorus compound and a rare earth-iron-nitrogen-based magnetic powder, the phosphorus treatment including adding an inorganic acid to a slurry containing: a rare earth-iron-nitrogen-based magnetic powder containing R, Fe, and N, where R represents at least one selected from the group consisting of Y, Ce, Pr, Nd, Gd, Tb, Dy, Ho, Er, Tm, Lu, and Sm, and if R contains Sm, Sm constitutes less than 50 atm% of a total R content; water; and a phosphorus-containing substance. Also included are a magnetic material for magnetic field amplification and a magnetic material for hyper-high frequency absorption each of which contains a phosphorus compound and a rare earth-iron-nitrogen-based magnetic powder.

公开(公告)号：EP3514807A1

公开(公告)日：2019-07-24

申请号：EP19152690.4

申请日：2019-01-21

申请人： NICHIA CORPORATION

发明人： YAMANAKA, Satoshi ,  YANO, Takayuki

IPC分类号： H01F1/055 ,  H01F1/057 ,  H01F1/08 ,  B22F1/00 ,  B22F3/00 ,  B29B7/00 ,  B29B7/46 ,  B29B9/06 ,  B29B9/12

摘要： Method of preparing a compound for bonded magnets, the method including: coating a magnetic material having an average particle size of 10 μm or less with a thermosetting resin and a curing agent at a ratio of the equivalent weight of the curing agent to the equivalent weight of the thermosetting resin of 2 or higher and 10 or lower to obtain a coated material; granulating the coated material by compression to obtain a granulated product; milling the granulated product to obtain a milled product; and surface treating the milled product with a silane coupling agent to obtain a compound for bonded magnets, the method either including, between the granulation and the milling, heat curing the granulated product to obtain a cured product, or including, between the milling and the surface treatment, heat curing the milled product to obtain a cured product.