Title:
表面に粗面化構造を有する希土類磁石前駆体または希土類磁石成形体とそれらの製造方法
Document Type and Number:
Japanese Patent JP6989713
Kind Code:
B2
Abstract:
Provided are a rare earth magnet precursor having a roughened structure on a surface or a rare earth magnet molded body having a roughened structure on a surface, and a method for manufacturing the same. In the rare earth magnet precursor or the rare earth magnet molded body, recesses and protrusions are formed on the surface having the roughened structure, and the recesses and protrusions satisfy at least one of the following (a) to (c): (a) an arithmetic mean height (Sa) (ISO 25178) from 5 to 300 µm, (b) a maximum height (Sz) (ISO 25178) from 50 to 1500 µm, and (c) a developed interfacial area ratio (Sdr) (ISO 25178) from 0.3 to 12.
Inventors:
Kiyoshi Shimizu
Masahiko Itakura
Wada Hoju
Takayuki Uno
Masahiko Itakura
Wada Hoju
Takayuki Uno
Application Number:
JP2020563314A
Publication Date:
January 05, 2022
Filing Date:
December 24, 2019
Export Citation:
Assignee:
Daicel Fine Chem Ltd.
International Classes:
H01F13/00; H01F7/02; H01F41/02
Domestic Patent References:
| JP2015220974A | ||||
| JP2014138511A | ||||
| JP2008251675A | ||||
| JP2002124414A | ||||
| JP2001230108A |
Foreign References:
| WO2011048652A1 | ||||
| WO2014132743A1 | ||||
| WO2017086386A1 |
Attorney, Agent or Firm:
Satoshi Furuya
Yoshitsune Kazumasa
Yoshitsune Kazumasa