CN202948801U - High-performance sintered neodymium-iron-boron permanent magnet material - Google Patents
High-performance sintered neodymium-iron-boron permanent magnet material Download PDFInfo
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- CN202948801U CN202948801U CN 201220469097 CN201220469097U CN202948801U CN 202948801 U CN202948801 U CN 202948801U CN 201220469097 CN201220469097 CN 201220469097 CN 201220469097 U CN201220469097 U CN 201220469097U CN 202948801 U CN202948801 U CN 202948801U
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- iron
- neodymium
- boron
- permanent magnet
- magnetic sheets
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Abstract
Provided is a high-performance sintered neodymium-iron-boron permanent magnet material. The high-performance sintered neodymium-iron-boron permanent magnet material comprises neodymium-iron-boron magnetic sheets. The high-performance sintered neodymium-iron-boron permanent magnet material is characterized in that the neodymium-iron-boron magnetic sheets are arranged in a layered mode. A temperature compensation alloy layer is arranged between two adjacent neodymium-iron-boron magnetic sheets. An alumel cladding layer is coated on a neodymium-iron-boron magnetic sheet. The high-performance sintered neodymium-iron-boron permanent magnet material has the advantages that due to the fact that the temperature compensation alloy layer is arranged between the two adjacent neodymium-iron-boron magnetic sheets, magnetic performance of the neodymium-iron-boron magnetic sheets can change along with changes of temperature, and can keep stable in a high temperature environment; the neodymium-iron-boron magnetic sheets are arranged according to magnitude of coercive force, neodymium-iron-boron magnetic sheets which are large in the coercive force are enabled to be close to a motor coil, and therefore, when temperature rises, internal magnetic fields of the neodymium-iron-boron magnetic sheets with large coercive force are incapable of changing because of influence of an outside magnetic field, and stability of magnetic fields are improved.
Description
Technical field
The utility model belongs to field of magnetic material, is specifically related to a kind of high performance sintered neodymium-iron-boron permanent magnetic material.
Background technology
Neodymium-iron-boron magnetic material is as the latest result of rare earth permanent-magnetic material development, because its excellent magnetic property is called as " magnetic king ".Because neodymium iron boron has high magnetic energy product and coercive force, the advantage of high-energy-density is applied widely NdFeB material in modernization industry and electronic technology simultaneously, thereby makes device miniaturization, lightness, the slimmings such as instrument and meter, electroacoustic motor, magnetic separation magnetization become possibility.
Traditional Nd-Fe-B magnet steel is comprised of the one-component magnet steel, in the situation that motor runs up, have the large defective of eddy current, and most magnet steel is in all in the operational environment of higher temperature in use.Therefore, produce the demagnetization phenomenon in order to prevent the magnet steel temperature influence, must increase the umber of some heavy rare earth element when making magnet steel, thereby improve the coercive force of Nd-Fe-B magnet steel.But this method exists defective: coercitive raising has also caused the reduction of magnet steel remanent magnetism; The interpolation of heavy rare earth element has caused the significantly raising of magnetic steel material cost, is unfavorable for the extensive use of product.Therefore, need a kind of heavy rare earth element that need not add of invention badly namely applicable to the magnet of higher temperature environment.
Summary of the invention
The technical problems to be solved in the utility model is: overcome the deficiencies in the prior art, provide a kind of heavy rare earth element that need not add just can be suitable for the high performance sintered neodymium-iron-boron permanent magnetic material that the higher temperature environment uses.
The technical scheme that its technical problem that solves the utility model adopts is: a kind of high performance sintered neodymium-iron-boron permanent magnetic material, comprise ndfeb disk, it is characterized in that: ndfeb disk is layered arrangement, set temperature compensator alloy layer between the adjacent two layers ndfeb disk, ndfeb disk is coated with alumel coating.
Preferably, ndfeb disk is arranged in order from high to low by the coercive force height.
Compared with prior art, the beneficial effects of the utility model are:
1. owing to being provided with temperature compensation alloy between adjacent ndfeb disk, the magnetic property of ndfeb disk varies with temperature and changes, and can keep stable under hot environment.
2. arrange magnet according to coercitive height, make the higher magnetic sheet of coercive force near motor coil, so since, when temperature raise, the magnetic sheet internal magnetic field of higher coercivity can not be subjected to external magnetic field affect and change, and has strengthened the stability in magnetic field.
Description of drawings
Fig. 1 is the utility model cutaway view.
Be labeled as in figure:
1, ndfeb disk; 2, temperature compensation alloy layer; 3, alumel coating.
Embodiment
Below in conjunction with drawings and Examples, the utility model is described further:
As shown in Figure 1, a kind of high performance sintered neodymium-iron-boron permanent magnetic material comprises ndfeb disk 1, and ndfeb disk 1 is layered arrangement, set temperature compensator alloy layer 2 between adjacent two ndfeb disks 1, and temperature compensation alloy adopts iron-nickel alloy.During manufacturing, the iron-nickel alloy powder is added in mould, then add the ndfeb disk powder, alternately add successively two kinds of powders, then be pressed into moulded blank, put at last the stove sintering, make temperature compensation alloy layer 2 become alloying with ndfeb disk 1 and be connected.In order to prevent that ndfeb disk is scraped by the external world and damaged and demagnetization, can be at ndfeb disk 1 outer cladding alumel coating 3.
As the motor critical component time, magnet is understood temperature influence and is caused changes of magnetic field, has a strong impact on the normal operation of motor.Therefore, in order better to avoid the phenomenon by the changes of magnetic field of variations in temperature generation, ndfeb disk 1 is arranged in order from high to low according to the coercive force height.During use, the higher magnetic sheet of coercive force is near coil, the lower magnetic sheet off-line circle of coercive force farthest, thus since, even if the magnetic field of the magnetic sheet of high-coercive force is subjected to influence of temperature change also larger variation can not occur; And the magnetic sheet of low-coercivity can not produce larger variation due to the minimum that is acted upon by temperature changes away from coil yet.
The above, it is only preferred embodiment of the present utility model, be not to be the utility model to be done the restriction of other form, any those skilled in the art may utilize the technology contents of above-mentioned announcement to be changed or be modified as the equivalent embodiment of equivalent variations.But every technical solutions of the utility model content that do not break away to any simple modification, equivalent variations and remodeling that above embodiment does, still belongs to the protection range of technical solutions of the utility model according to technical spirit of the present utility model.
Claims (2)
1. high performance sintered neodymium-iron-boron permanent magnetic material, comprise ndfeb disk (1), it is characterized in that: ndfeb disk (1) is layered arrangement, set temperature compensator alloy layer (2) between adjacent two layers ndfeb disk (1), ndfeb disk (1) is coated with alumel coating (3).
2. high performance sintered neodymium-iron-boron permanent magnetic material according to claim 1 is characterized in that: ndfeb disk (1) is arranged in order from high to low by the coercive force height.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201220469097 CN202948801U (en) | 2012-09-15 | 2012-09-15 | High-performance sintered neodymium-iron-boron permanent magnet material |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201220469097 CN202948801U (en) | 2012-09-15 | 2012-09-15 | High-performance sintered neodymium-iron-boron permanent magnet material |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN202948801U true CN202948801U (en) | 2013-05-22 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 201220469097 Expired - Fee Related CN202948801U (en) | 2012-09-15 | 2012-09-15 | High-performance sintered neodymium-iron-boron permanent magnet material |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN202948801U (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105118594A (en) * | 2015-08-27 | 2015-12-02 | 安徽大地熊新材料股份有限公司 | High-heat-conductivity rare-earth iron R-Fe-B magnet and preparing method thereof |
| CN108053968A (en) * | 2017-12-14 | 2018-05-18 | 天津邦特磁性材料有限公司 | A kind of high energy sintered Nd-Fe-B permanent magnetic material |
-
2012
- 2012-09-15 CN CN 201220469097 patent/CN202948801U/en not_active Expired - Fee Related
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105118594A (en) * | 2015-08-27 | 2015-12-02 | 安徽大地熊新材料股份有限公司 | High-heat-conductivity rare-earth iron R-Fe-B magnet and preparing method thereof |
| CN108053968A (en) * | 2017-12-14 | 2018-05-18 | 天津邦特磁性材料有限公司 | A kind of high energy sintered Nd-Fe-B permanent magnetic material |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20130522 Termination date: 20200915 |
|
| CF01 | Termination of patent right due to non-payment of annual fee |