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Permanent magnet material based on co-associated primary mixed rare earth metal, preparation method and application thereof

A technology of permanent magnet materials and mixed rare earths, which is applied in the direction of magnetic materials, inorganic materials, magnetic objects, etc., can solve the problems of unfavorable comprehensive performance of magnets, the effective utilization of rare earth resources, and reduce the coupling advantages of dual main phase magnets, so as to achieve environmental benefits Protect and increase comprehensive magnetic properties and simplify the preparation process

Active Publication Date: 2019-08-23
INST OF PHYSICS - CHINESE ACAD OF SCI +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Although this method is beneficial to the realization of the magnet preparation process (you can directly use the single main phase preparation method without a new preparation process), it reduces the coupling advantages of this dual main phase magnet to a certain extent, which is not conducive to the magnet Improvement of comprehensive performance and effective utilization of rare earth resources

Method used

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  • Permanent magnet material based on co-associated primary mixed rare earth metal, preparation method and application thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0038] (1) Preparation of two main alloys R M32 Fe 63 Zr 3 al 0.9 B 1.1 and (Pr 0.4 Nd 0.6 ) 30 Fe 67 al 2 B 1 , the total mass of the two main alloys is 2.5Kg, respectively prepared into quick-setting sheets with a thickness of 0.3mm.

[0039] (2) The above two main alloys are subjected to hydrogen crushing respectively to obtain particles with an average particle size distribution of about 1-3 mm, and then respectively jet milled to obtain particles with an average particle size of about 2 μm.

[0040] (3) According to mass ratio R M32 Fe 63 Zr 3 al 0.9 B 1.1 :(Pr 0.4 Nd 0.6 ) 30 Fe 67 al 2 B 1 Mix the above jet-milled powder in a ratio of 30:70, weigh 10g of it, seal it, put it into an argon-protected magnetic field orientation mold, and perform orientation molding under a magnetic field of 1.5T (the pressure is about 20MPa).

[0041] (4) Put the formed magnet into a hot isostatic pressing machine to press for 0.5 hour at a temperature of 700° C. under ...

Embodiment 2

[0071] According to the same steps as in Example 1 to prepare a dual main phase magnet, the difference is that step (4) is: put the formed magnet into a hot isostatic press under an isostatic pressure of 120 MPa at a temperature of 900 ° C , pressed for 0.5 hour, and then rapidly cooled by a built-in cooler; and steps (5) and (6) were not carried out. The test results are listed in Table 1.

[0072] It can be seen from the data in Table 1 that as long as the temperature and time of hot isostatic pressing are appropriate, the direct production of magnets without sintering and tempering in the later stage will not lead to a significant decrease in magnetic properties. This is very beneficial for reducing preparation time.

Embodiment 3

[0074] (1) Preparation of two main alloys R M32 Fe 66 Al 1 B 1 and (Nd 0.97 Dy 0.03 ) 30 Fe 69 B 1 , the total mass of the two main alloys is 2.5Kg, respectively made of 0.3mm quick-setting sheet.

[0075] (2) The above two main alloys are subjected to hydrogen crushing to obtain particles with an average particle size distribution of about 1-3 mm, and then jet milled to obtain jet mill particles with an average particle size of 1.5 μm and 3 μm respectively.

[0076] (3) According to mass ratio R M32 Fe 66 Al 1 B 1 :(Nd 0.97 Dy 0.03 ) 30 Fe 69 B 1 Mix the above jet-milled powder in a ratio of 10:90, weigh 10g of it, seal it, put it into an argon-protected magnetic field orientation mold, and perform orientation molding under a magnetic field of 1.5T (pressure is about 20MPa).

[0077] (4) Put the molded magnet into a hot isostatic press to press it for 0.5 hour at a temperature of 1040° C. under an isostatic pressure of 100 MPa, and then rapidly cool it throug...

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Abstract

The invention provides a dual-main-phase permanent magnet material based on coexisting associated primary mixed rare-earth metals and a preparation method and application thereof. The formula of the dual-main-phase permanent magnet material is (RMaFe100-a-b-cMbBc)1-x{[(Pr1-yNdy)1-zRz]dFe100-d-e-fMeBf}x, the permanent magnet material is prepared from two phases of RMaFe100-a-b-cMbBc and [(Pr1-yNdy)1-zRz]dFe100-d-e-fMeBf, wherein FM is coexisting associated primary mixed rare-earth metals which are prepared from, by mass, 20-32% of La, 48-58% of Ce, 4-6% of Pr and 15-17% of Nd; M is one or more of Mn, Co, Ni, Zr, Ti, Cu, Zn, Al, Ga, In, Sn, Ge and Si; R is one or more of Y, La, Ce, Eu, Gd, Tb, Dy, Ho, Er, Tm, Yb and Lu. Due to the fact that the price of a permanent magnet is low, the comprehensive performance is excellent, and the dual-main-phase permanent magnet material has the quite wide application value.

Description

technical field [0001] The invention relates to a permanent magnet material based on co-associated primary mixed rare earth metals, a preparation method and application thereof. Background technique [0002] As the third generation rare earth permanent magnet material, NdFeB has high remanence B r , high coercive force H cj , high energy product (BH) m It has been used in high-tech fields such as aerospace, information and energy, and is one of the important basic materials of modern industry. However, as the global demand for NdFeB continues to increase, the use of rare earth element neodymium has also greatly increased, resulting in metal neodymium accounting for more than 90% of the cost of NdFeB raw materials. It has caused a lot of pressure on magnetic material manufacturers and users. Moreover, since rare earths are associated ores, the demand for scarce resources such as Pr, Nd, Tb, and Dy on the one hand leads to a large backlog of high-abundance rare earths such...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H01F1/057H01F1/06C22C30/00C22C38/06
Inventor 左文亮沈保根赵同云孙继荣胡凤霞闫阿儒陈仁杰郭帅陈岭商荣翔陈侃
Owner INST OF PHYSICS - CHINESE ACAD OF SCI