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Method for preparing nano composite permanent magnet material by adding zirconium into magnetic steel waste

A permanent magnetic material and nanocomposite technology, which is applied in the direction of magnetic materials, magnetic objects, electrical components, etc., can solve the problem of the difficulty in controlling the scale and composition of two phases, the difficulty in increasing the maximum magnetic energy product of isotropic nanomaterials, and the difficulty in Precisely control the grain size and distribution of hard magnetic phase and soft magnetic phase to achieve the effect of changing grain microstructure and magnetic properties, low rare earth content, and saving time

Inactive Publication Date: 2016-01-20
SUZHOU SABO IND DESIGN
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, although these methods can also adjust the microstructure of the composite material, it is difficult to precisely control the grain size and distribution of the hard magnetic phase and the soft magnetic phase, especially the size and composition of the two phases.
Therefore, it is difficult to increase the maximum energy product of isotropic nanomaterials

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0029] A kind of nanocomposite permanent magnetic material, carries out batching according to following table 1-1:

[0030] Table 1-1 Example 1 formula table

[0031] The preparation method of the above-mentioned nanocomposite permanent magnet material of the present embodiment is as follows:

[0032] The collected waste magnets are pre-classified according to the classification standard that the waste magnets with the same rare earth elements contained in the same batch and the same type are classified into one category to obtain pretreated magnet materials; and then according to the prepared nanocomposite permanent magnet materials, the obtained The pretreated magnet materials are directly subjected to hydrogen crushing to obtain rare earth hydrogen crushed magnetic powder; at the same time, the obtained rare earth hydrogen crushed magnetic powder is sampled and analyzed to obtain the parameters of the rare earth magnetic powder components, and then according to the p...

Embodiment 2

[0037] A kind of nanocomposite permanent magnet material, carry out batching according to following table 2-1:

[0038] Table 2-1 Example 2 formula table

[0039] components

Neodymium

Praseodymium

Gadolinium

Yttrium

zirconium

Boron

copper

aluminum

iron

total

Weight / kg

3.8

2.5

1.68

0.21

1.1

0.1

0.02

0.04

11.9

21.35

mass percentage / %

18

12

8

1

5

0.5

0.1

0.2

55.2

100

[0040] The preparation method of the above-mentioned nanocomposite permanent magnet material of the present embodiment is as follows:

[0041]The collected waste magnets are pre-classified according to the classification standard that the waste magnets with the same rare earth elements contained in the same batch and the same type are classified into one category to obtain pretreated magnet materials; and then according to the prepared nanocomposite permanent magne...

Embodiment 3

[0045] A kind of nanocomposite permanent magnet material, carry out batching according to following table 3-1:

[0046] Table 3-1 Example 3 formula table

[0047] components

Neodymium

Praseodymium

Gadolinium

Yttrium

zirconium

Boron

copper

aluminum

iron

total

Weight / kg

2.7

2.1

2.52

0.23

2.1

0.3

0.04

0.1

10.9

20.99

mass percentage / %

13

10

12

1.1

10

1.2

0.2

0.5

52

100

[0048] The preparation method of the above-mentioned nanocomposite permanent magnet material of the present embodiment is as follows:

[0049] The collected waste magnets are pre-classified according to the classification standard that the waste magnets with the same rare earth elements contained in the same batch and the same type are classified into one category to obtain pretreated magnet materials; and then according to the prepared nanocomposite permanent mag...

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Abstract

The invention relates to a method for preparing a nano composite permanent magnet material by adding zirconium into magnetic steel waste. Collected waste magnetic steel is presorted according to the classification standard that the waste magnetic steel which is in the same batch and model and is provided with same rare earth elements is classified as one class, and a pre-processed magnet material is obtained; the obtained pre-processed magnet material is directly subjected to hydrogen decrepition pulverizing, and rare earth hydrogen decrepition magnetic powder is obtained; sampling analysis is carried out on the rare earth hydrogen decrepition magnetic powder, and the zirconium is added into the rare earth hydrogen decrepition magnetic powder according to needs to obtain mixed powder; and finally through static pressing, sintering and annealing, the needed nano composite permanent magnet material is prepared. The problem of segregation, caused by factors such as different smelting pints of all compositions and the like, generated by an alloy ingot obtained after smelting can be effectively solved; and through presorting, the time for recovering the waste magnetic steel can be saved, and the process step of extraction is omitted. The zirconium is added into the rare earth hydrogen decrepition magnetic powder, the grain microstructure and the magnetic performance of the nano composite permanent magnet material can be changed, and grain refinement is promoted; and the nano composite permanent magnet material obtained through a precipitation separation method is high in performance and low in rare earth content.

Description

technical field [0001] The invention relates to the technical field of nanocomposite permanent magnet materials, in particular to a method for preparing nanocomposite permanent magnet materials by adding zirconium to magnetic steel waste. Background technique [0002] In recent years, with the continuous expansion of the application field of nanocomposite permanent magnet materials, the demand for raw materials has increased. However, due to the high cost of rare earth mining and the increase in national regulation, the cost of materials has gradually increased. . However, under the current situation of excessive price increase, the price tolerance of downstream enterprises is relatively limited, so some downstream enterprises choose to use cheaper materials such as ferrite or aluminum nickel zirconium, samarium zirconium and other materials to replace the rare earth in the raw materials of NdFeB magnets , which brings greater instability to the NdFeB magnet market. At the...

Claims

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Application Information

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IPC IPC(8): B22F1/00B22F3/16B22F3/24C22C38/16C22C38/14C22C33/02H01F1/053
Inventor 张苏丁会
Owner SUZHOU SABO IND DESIGN
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