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Flexible rare-earth cementing magnet and method of manufacturing the same

A bonded magnet and rare earth technology, which is used in the manufacture of inductors/transformers/magnets, magnetic objects, magnetic materials, etc., can solve the problems of anisotropic magnetic powder that cannot exert high performance, low magnetic performance of magnets, etc., and achieve low product cost. , Simple production process, high magnetic properties and anisotropic effects

Inactive Publication Date: 2009-06-24
BEIKUANG MAGNETS FUYANG CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

In the technical solutions disclosed in these two patent applications, all products with high magnetic properties are manufactured by molding, and the shape of the product is rigid; and for anisotropic magnetic powder, the technical solutions disclosed in these two patents also use The manufacturing process of isotropic magnetic powder does not apply an orientation magnetic field, which will lead to the inability to play the role of high-performance anisotropic magnetic powder, resulting in low magnetic properties of the manufactured magnet in a flexible form

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0031] In the present embodiment, the composite permanent magnet powder adopted comprises 5% by weight anisotropic NdFeN permanent magnet powder, 45% anisotropic SmFeN permanent magnet powder and 50% anisotropic NdFeB permanent magnet powder ; The binder used is acetic acid-vinyl acetate copolymer, the percentage by weight is 10%, the percentage by weight of the composite permanent magnetic powder is 88%, and the percentage by weight of the processing aid is 2%.

[0032] After the composite permanent magnetic powder is treated with a surface treatment agent (the surface treatment agent is phosphoric acid and a silane coupling agent, and its weight is respectively 0.4% and 0.6% of the weight of the composite permanent magnetic powder), it is uniformly mixed with the binder and the processing aid, Then crush and granulate, collect the pellets passing through the 6-purpose standard screen, and extrude the obtained pellets through the extruder under the effect of the orientation ma...

Embodiment 2

[0035] In the present embodiment, the composite permanent magnet powder adopted comprises 20% by weight anisotropic NdFeN magnetic powder, 50% anisotropic SmFeN magnetic powder and 30% anisotropic NdFeB magnetic powder; The binder is a mixture of acetic acid-vinyl acetate copolymer and chlorinated polyethylene, the percentage by weight is 6%, the percentage by weight of the composite permanent magnetic powder is 90%, and the percentage by weight of the processing aid is 4%.

[0036] After the composite permanent magnetic powder is treated with a surface treatment agent (the surface treatment agent is phosphoric acid and a silane coupling agent, and its weight is respectively 0.4% and 0.6% of the weight of the composite permanent magnetic powder), it is uniformly mixed with the binder and the processing aid, Then crush and granulate, collect the pellets that can pass through a 6-purpose standard screen, and extrude the obtained pellets through an extruder under the effect of an ...

Embodiment 3

[0039] In the present embodiment, the composite permanent magnet powder used comprises 50% by weight anisotropic NdFeN magnetic powder, 25% anisotropic SmFeN magnetic powder and 25% anisotropic NdFeB magnetic powder; The binder is a mixture of nitrile rubber and chlorosulfonated polyethylene, the percentage by weight is 10%, the percentage by weight of the composite permanent magnetic powder is 85%, and the percentage by weight of the processing aid is 5%.

[0040] After the composite permanent magnetic powder is treated with a surface treatment agent (the surface treatment agent is phosphoric acid and a silane coupling agent, and its weight is respectively 0.4% and 0.6% of the weight of the composite permanent magnetic powder), it is uniformly mixed with the binder and the processing aid, Then crush and granulate, collect the pellets that can pass through a 6-purpose standard screen, and extrude the obtained pellets through an extruder under the effect of an orientation magnet...

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Abstract

The invention provides a flexible rare earth bonded magnet and a manufacturing method thereof. Based on weight percentage, the flexible rare earth bonded magnet comprises 85%-92% of compound permanent magnet powders, 6%-10% of binder and 2% -5% of processing aid; wherein, the compound permanent magnet powders comprise anisotropic samarium iron nitrogen permanent magnet powders, anisotropic Nd-Fe-N permanent magnet powders and anisotropic NdFeB powders. The flexible rare earth bonded magnet is obtained through extrusion molding and orientation field application and is provided with high magnetic properties and good flexibility, thereby broadening the application scope of flexible magnets and extending the magnetic property space of the flexible magnet system; therefore, the flexible rare earth bonded magnet can meet the requirements of high-tech products on the magnetic properties and flexibility of magnets.

Description

technical field [0001] The invention belongs to the field of magnetic materials, and relates to a bonded permanent magnet material, in particular to a flexible rare earth bonded magnet and a manufacturing method thereof. Background technique [0002] With the rapid development of the global information industry, my country's IT industry will rise rapidly in the next ten years. The computer industry, automobile industry and consumer electronics market will show a sharp increase in the demand for high-performance magnetic materials, but the existing magnetic materials cannot meet the needs of high-end, precise and sharp products due to their own reasons. [0003] At present, the magnetic energy product (BH) of bonded rigid permanent magnet materials max Can reach 80-160kJ / m 3 However, its products are rigid and cannot be elastically deformed. Therefore, it is impossible to use this permanent magnetic material to make products with thin walls and large aspect ratios, and it i...

Claims

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Application Information

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IPC IPC(8): H01F1/053H01F1/08H01F41/02B22F3/00
Inventor 闫春山王峰李亚峰刘小平
Owner BEIKUANG MAGNETS FUYANG CO LTD
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