Unlock instant, AI-driven research and patent intelligence for your innovation.

Dy-containing rare earth permanent magnet with high magnetic energy product and high coercive force and preparation method thereof

A technology of rare earth permanent magnets and high coercive force, applied in the direction of magnetic objects, magnetic materials, inorganic materials, etc. Coercive force and the effect of improving the magnetic properties of magnets

Pending Publication Date: 2021-10-22
INNER MONGOLIA UNIV OF SCI & TECH
View PDF3 Cites 2 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, this method requires secondary molding, and the magnet forming process increases, and the process stability will be affected

Method used

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
View more

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0032] A rare earth permanent magnet containing Dy with high energy product and high coercive force, the raw materials include (Nd, RE)-Fe-B alloy and (Dy, RE)-Fe-B alloy, wherein the alloy (Nd, RE)-Fe -The chemical formula of B is Nd in atomic percent 13 Fe 80 co 0.9 Zr 0.1 Ga 0.1 B 5.9 (Nd is 13at.%, Fe is 80at.%, Co is 0.9at.%, Zr is 0.1at.%, Ga is 0.1at.%, B is 5.9at.%), alloy (Dy, RE)- The chemical formula of Fe-B is Dy in atomic percent 19 Fe 75 B 6 .

[0033] The content of (Nd, RE)-Fe-B alloy in the raw material is 90wt% of the total weight of alloy powder after mixing, and the content of (Dy, RE)-Fe-B alloy is 10wt% of the total weight of alloy powder after mixing.

[0034] The preparation method of the rare earth permanent magnet comprises the following steps:

[0035] (1) According to the composition requirements of the above-mentioned raw materials, the composition mixture of each raw material is prepared;

[0036] (2) Preparation of Nd 13 Fe 80 co 0....

Embodiment 2

[0045] A rare earth permanent magnet containing Dy with high energy product and high coercive force, the raw materials include (Nd, RE)-Fe-B alloy and (Dy, RE)-Fe-B alloy, wherein the alloy (Nd, RE)-Fe -The chemical formula of B is Nd in atomic percent 13.3 Fe 79.7 co 0.9 Zr 0.1 Ga 0.1 B 5.9 (that is, Nd is 13.3at.%, Fe is 79.7at.%, Co is 0.9at.%, Zr is 0.1at.%, Ga is 0.1at.%, B is 5.9at.%), alloy (Dy, RE The chemical formula of )-Fe-B is Dy by atomic percentage 19 Fe 75 B 6 .

[0046] The content of (Nd, RE)-Fe-B alloy in the raw material is 90wt% of the total weight of alloy powder after mixing, and the content of (Dy, RE)-Fe-B alloy is 10wt% of the total weight of alloy powder after mixing.

[0047] The preparation method of this rare earth permanent magnet is with embodiment 1 (wherein step (4) is 9gNd 13.3 Fe 79.7 co 0.9 Zr 0.1 Ga 0.1 B 5.9 Alloy powder and 1g Dy 19 Fe 75 B 6 The alloy powder is mixed evenly), and the permanent magnetic measuring device ...

Embodiment 3

[0049] A rare earth permanent magnet containing Dy with high magnetic energy product and high coercive force, the raw materials include (Nd,RE)-Fe-B alloy, (Dy,RE)-Fe-B alloy and TbF 3 , where the chemical formula of the alloy (Nd,RE)-Fe-B is Nd in atomic percent 13 Fe 80 co 0.9 Zr 0.1 Ga 0.1 B 5.9 (Nd is 13at.%, Fe is 80at.%, Co is 0.9at.%, Zr is 0.1at.%, Ga is 0.1at.%, B is 5.9at.%), alloy (Dy, RE)- The chemical formula of Fe-B is Dy in atomic percent 19 Fe 75 B 6 .

[0050] The content of (Nd, RE)-Fe-B alloy in the raw material is 90wt% of the total weight of alloy powder after mixing, and the content of (Dy, RE)-Fe-B alloy is 8wt% of the total weight of alloy powder after mixing, TbF 3 The content is 2wt% of the total weight of alloy powder after mixing.

[0051] The preparation method of this rare earth permanent magnet is with embodiment 1 (wherein step (4) is 9gNd 13 Fe 80 co 0.9 Zr 0.1 Ga 0.1 B 5.9 Alloy powder, 0.8g Dy 19 Fe 75 B 6 Alloy powder and ...

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

PUM

PropertyMeasurementUnit
thicknessaaaaaaaaaa
Login to View More

Abstract

The invention relates to a Dy-containing rare earth permanent magnet with high magnetic energy product and high coercive force and a preparation method thereof. The method comprises the steps that element diffusion and intergranular phase distribution are modulated through a multi-alloy technology, Nd-Fe-B alloy powder and Dy-Fe-B alloy powder are directly mixed for one-time forming, and then the rare earth permanent magnet is prepared through sintering; the content of rare earth Nd in the Nd-Fe-B alloy is properly reduced, the content of rare earth in the Dy-Fe-B alloy is increased, and high-melting-point and low-melting-point elements are jointly added to improve the coercive force of the magnet and maintain the high magnetic energy product. The prepared rare earth permanent magnet has high magnetic energy product and high coercive force, the magnetic energy product (BH) max is larger than or equal to 46.0 MGOe, the coercive force Hc is larger than or equal to 18.0 kOe, and (BH) max + Hc is larger than or equal to 66.0.

Description

technical field [0001] The invention relates to a Dy-containing rare earth permanent magnet with high magnetic energy product and high coercive force and a preparation method thereof, belonging to the field of preparation of rare earth permanent magnet materials. Background technique [0002] Rare earth permanent magnet NdFeB Nd-Fe-B has high remanence and high magnetic energy product, and has become an indispensable key material in modern science and technology, especially in the fields of transportation, computer, information, aerospace, clean energy, etc., and has been widely used. Promote the development of related industries. However, the coercive force of rare earth NdFeB permanent magnet materials is low, and it is difficult to fully meet the magnetic performance requirements of electric vehicles, wind power and other fields. Therefore, it is necessary to further increase the coercive force of NdFeB permanent magnet materials. [0003] Rare earth Dy 2 Fe 14 Althoug...

Claims

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

Application Information

Patent Timeline
no application Login to View More
Patent Type & Authority Applications(China)
IPC IPC(8): H01F1/08H01F1/053B22F3/12
CPCH01F1/08H01F1/053B22F3/12
Inventor 李柱柏刘艳丽段东伟魏磊赵倩
Owner INNER MONGOLIA UNIV OF SCI & TECH