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Pure high-abundance rare earth Ce, La and Y-based multi-element nanocrystalline permanent magnet alloy and preparation

A high-abundance permanent magnet alloy technology, applied in the manufacture of inductors/transformers/magnets, magnetic materials, magnetic objects, etc., can solve the problem that the coercivity and maximum energy product of the alloy cannot reach the optimal value at the same time, and the intrinsic magnetic properties Poor, poor thermal stability of Ce-based nanocrystalline permanent magnet alloys, etc., to alleviate the problem of unbalanced utilization of rare earths

Inactive Publication Date: 2019-12-03
SOUTH CHINA UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] At present, the problem of Ce-based or Ce / La-based nanocrystalline permanent magnet alloys is that the comprehensive magnetic properties of the alloys are not high, that is, the coercive force and the maximum magnetic energy product of the alloy cannot reach the optimal value at the same time.
At the same time, due to Ce 2 Fe 14 Compound B has poor intrinsic magnetic properties, and its anisotropy field H A It is greatly affected by temperature, so the thermal stability of Ce-based nanocrystalline permanent magnet alloy is poor

Method used

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  • Pure high-abundance rare earth Ce, La and Y-based multi-element nanocrystalline permanent magnet alloy and preparation
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Experimental program
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Effect test

Embodiment 1

[0028] 1) Raw material preparation

[0029] Composition by atomic ratio [(Ce 0.9 La 0.1 ) 0.8 Y 0.2 ] 17 Fe 78 B 6 Prepare raw materials Ce, La, Y, Fe and FeB for later use (the purity is more than 99.8%; rare earth element raw materials Ce, La and Y need to be mechanically polished before preparation to remove rare earth oxides that may exist on the surface), each raw material weighs Quantity error is less than 0.0001%.

[0030] 2) Preparation of alloy ingots by argon arc melting

[0031] Place the prepared raw materials in an electric arc furnace, and evacuate until the vacuum degree reaches 5×10 -4 Below Pa, clean the furnace cavity with high-purity argon (Ar), repeat three times. Subsequently, high-purity argon is filled to normal pressure, and the mixed raw materials are subjected to argon arc melting under the protection of argon gas. According to the volatile degree of each element in the argon arc melting process, the order of placing each element is from the ...

Embodiment 2

[0036] 1) Raw material preparation

[0037] Composition by atomic ratio [(Ce 0.9 La 0.1 ) 0.6 Y 0.4 ] 17 Fe 78 B 6 Prepare the raw materials Ce, La, Y, Fe and FeB for later use (the purity is more than 99.8%; the rare earth element raw materials Ce, La and Y need to be mechanically polished before preparation to remove the rare earth oxides that may exist on the surface), each element weighs Quantity error is less than 0.001%.

[0038] 2) Preparation of alloy ingots by argon arc melting

[0039] Place the prepared raw materials in an electric arc furnace, and evacuate until the vacuum degree reaches 5×10 -4 Below Pa, clean the furnace cavity with high-purity argon (Ar), repeat three times. Subsequently, high-purity argon is filled to normal pressure, and the mixed raw materials are subjected to argon arc melting under the protection of argon gas. According to the volatile degree of each element in the argon arc melting process, the order of placing each element is fro...

Embodiment 3

[0044] 1) Raw material preparation

[0045] Composition by atomic ratio [(Ce 0.8 La 0.2 ) 0.8 Y 0.2 ] 17 Fe 78 B 6 Prepare the raw materials Ce, La, Y, Fe and FeB for later use (the purity is more than 99.8%; the rare earth element raw materials Ce, La and Y need to be mechanically polished before preparation to remove the rare earth oxides that may exist on the surface), each element weighs Quantity error is less than 0.001%.

[0046] 2) Preparation of alloy ingots by argon arc melting

[0047] Place the prepared raw materials in an electric arc furnace, and evacuate until the vacuum degree reaches 5×10 -4 Below Pa, clean the furnace cavity with high-purity argon (Ar), repeat three times. Subsequently, high-purity argon is filled to normal pressure, and the mixed raw materials are subjected to argon arc melting under the protection of argon gas. According to the volatile degree of each element in the argon arc melting process, the order of placing each element is fro...

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Abstract

The invention belongs to the field of rare earth permanent magnet materials, and discloses a pure high-abundance rare earth Ce, La and Y-based multi-element nanocrystalline permanent magnet alloy andpreparation. The pure high-abundance rare earth Ce, La and Y-based multi-element nanocrystalline permanent magnet alloy has a composition of RE<x>Fe<101-x-y>B<y> according to an atomic ratio, x is greater than 11.5 and less than 17.5, y is greater than 5.7 and less than 6.3, and RE is [(Ce<1-a>La)<1-b>Y] composed of three rare earth elements Ce, La and Y according to a certain ratio, a is greater than 0 and less than 0.5 and b is greater than 0 and less than 0.5. The nanocrystalline permanent magnet alloy with high coercive force, high maximum magnetic energy product and excellent thermal stability is prepared by adjusting the mutual synergistic effect among high-abundance rare earth Ce, La and Y. The alloy does not contain Nd / Pr / Dy / Tb and other low-abundance rare earth, the cost performance of the magnet can be improved, and the problem of unbalanced utilization of the rare earth can be effectively solved.

Description

technical field [0001] The invention belongs to the field of rare earth permanent magnet materials, and in particular relates to a pure high-abundance rare earth Ce, La, Y-based multi-component nanocrystalline permanent magnet alloy and its preparation. Background technique [0002] Rare earth permanent magnet materials represented by NdFeB use a large number of rare earth metals such as praseodymium (Pr), neodymium (Nd), dysprosium (Dy), terbium (Tb), and high-abundance rare earths cerium (Ce), lanthanum (La ) and yttrium (Y) are backlogged in large quantities, and rare earth resources are seriously wasted. Therefore, make full use of Ce, La and Y elements, give full play to their advantages as a high-abundance rare earth resource, transform cheap raw materials into high-value-added high-tech products, and reduce Nd / Pr / Dy / Tb which is in short supply The mining of rare earth metals, such as rare earth metals, can not only effectively alleviate the problem of unbalanced utili...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01F1/057H01F41/02
CPCH01F1/0571H01F41/0253
Inventor 刘仲武廖雪峰张家胜余红雅钟喜春邱万奇
Owner SOUTH CHINA UNIV OF TECH
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