Highly thermostable rare-earth permanent magnetic material, preparation method thereof and magnet containing the same
AssigneeGrirem Advanced Materials Co., Ltd.
InventorsGuiyong Wu, Yang Luo, Hongwei Li, Yuanfei Yang, Dunbo Yu, Ningtao Quan, Chao Yuan, Wenlong Yan
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Abstract
Provided are a highly thermostable rare-earth permanent magnetic material, a preparation method thereof and a magnet containing the same. A composition of the rare-earth permanent magnetic material by an atomic percentage is as follows: SmxRaFe100-x-y-z-aMyNz, wherein R is at least one of Zr and Hf, M is at least one of Co, Ti, Nb, Cr, V, Mo, Si, Ga, Ni, Mn and Al, x+a is 7-10%, a is 0-1.5%, y is 0-5% and z is 10-14%.
Claims14
A rare-earth permanent magnetic material, a composition of the rare-earth permanent magnetic material by an atomic percentage being as follows:
- SmxRaFe100-x-y-z-aMyNz
- wherein R is at least one of Zr and Hf, M is at least one of Cr, V, Mo, Ni, and Mn, 7%≤x+a≤10%, 0<a≤1.5%, 0<y≤5%, 10%≤z≤14%, wherein the rare-earth permanent magnetic material comprises a TbCu7 phase, a Th2Zn17 phase and a soft magnetic phase α-Fe, wherein a content of the TbCu7 phase in the rare-earth permanent magnetic material is 80% or more, and a content of the soft magnetic phase α-Fe in the rare-earth permanent magnetic material is 0-5%, excluding 0, wherein the magnetic property Hcj of the rare-earth permanent magnetic material is 10 kOe or more and the magnetic energy product Bh is 14 MGOe or more.
Dependencies are inferred from the claim text.