	US 11,721,460 B2
	Method for preparing metal powder, and metal powder
June Ho In, Daejeon (KR); Soon Jae Kwon, Daejeon (KR); Ik Jin Choi, Daejeon (KR); Hyoun Soo Uh, Daejeon (KR); Jung Won Park, Daejeon (KR); Byung Kyu Lim, Daejeon (KR); and Pum Suk Park, Daejeon (KR)
Assigned to LG Chem, Ltd.
Appl. No. 16/318,478
Filed by LG Chem, Ltd., Seoul (KR)
PCT Filed Oct. 18, 2017, PCT No. PCT/KR2017/011536 § 371(c)(1), (2) Date Jan. 17, 2019, PCT Pub. No. WO2018/088709, PCT Pub. Date May 17, 2018.
Claims priority of application No. 10-2016-0148269 (KR), filed on Nov. 8, 2016.
Prior Publication US 2019/0292635 A1, Sep. 26, 2019
Int. Cl. H01F 1/057 (2006.01); B22F 9/04 (2006.01); C22C 33/02 (2006.01); C22C 38/00 (2006.01); B22F 9/24 (2006.01); B22F 9/20 (2006.01); B22F 1/16 (2022.01); B22F 1/06 (2022.01); B22F 1/05 (2022.01)

CPC H01F 1/0572 (2013.01) [B22F 1/06 (2022.01); B22F 1/16 (2022.01); B22F 9/04 (2013.01); B22F 9/20 (2013.01); B22F 9/24 (2013.01); C22C 33/02 (2013.01); C22C 33/0235 (2013.01); C22C 38/005 (2013.01); H01F 1/057 (2013.01); B22F 1/05 (2022.01); B22F 2301/355 (2013.01); C22C 2202/02 (2013.01); Y02B 10/30 (2013.01)]

12 Claims

1. A method for preparing a metal powder, comprising:

preparing a mixture by mixing neodymium oxide, boron, iron, and a reducing agent with at least one of a fluoride of a group 1 element, a fluoride of a group 2 element or a transition metal fluoride;

molding the mixture to prepare a molded body after the preparing of the mixture,

heating the molded body to a temperature of more than 800° C. to 1100° C. under an inert gas atmosphere; and

forming the metal powder,

wherein the metal powder is Nd₂Fe₁₄B,

wherein the reducing agent is at least one of calcium, calcium hydride, or calcium carbide, and

wherein a total content of the fluoride of the group 1 element, the fluoride of the group 2 element or the transition metal fluoride is 1 wt % to 10 wt % of the metal powder.