Title:
Ｒ−Ｆｅ−Ｂ系焼結磁性体の製造方法及びその製造装置
Document Type and Number:
Japanese Patent JP6573708
Kind Code:
B2
Abstract:
The present invention provides a method for preparing R-T-B sintered magnets. The method comprises the steps of:Introducing a carrier gas, a reactive gas, and a cooling gas into a plasma torch gun (1) and passing a Dy and/or Tb powder driven by the carrier gas through the plasma torch gun (1) thereby heating and melting the Dy and/or Tb powder under the action of high temperature of the plasma torch to generate spherical droplets which are deposited as a metal film on a surface of an R-T-B-M sintered basal diffusion magnet of RTB type, wherein R is at least one element selected from the rare earth elements including Sc and Y, T is at least one element selected from Fe and Co, B is boron, and M is at least one element selected from Ti, Zr, Hf, V, Nb, Ta, Mn, Ni, Cu, Ag, Zn, Zr, Al, Ga, In, C, Si, Ge, Sn, Pb, N, P, Bi, S, Sb, and O, and wherein a weight percentage of said elements is: 25% ≤ R ≤ 40%, 0 ≤ M ≤ 4%, 0.8% ≤ B ≤ 1.5%, and the residue is T.
Inventors:
Jin Jie
Liu Xiaotong
Liu Xiaotong
Application Number:
JP2018236880A
Publication Date:
September 11, 2019
Filing Date:
December 19, 2018
Export Citation:
Assignee:
Yantai Steel Magnetic Materials Stock Co., Ltd.
International Classes:
H01F41/02; B22F3/00; C22C33/02; C22C38/00; C23C4/06; C23C4/134; C23C4/18; C23C10/28; H01F1/057
Domestic Patent References:
| JP2014236221A | ||||
| JP2007273825A | ||||
| JP2007165607A | ||||
| JP2018528603A | ||||
| JP2013243346A |
Foreign References:
| CN102969110A |
Attorney, Agent or Firm:
Kenji Hidaka