CN1622230A - High temperature resistant rare earth magnet composition and magnet - Google Patents
High temperature resistant rare earth magnet composition and magnet Download PDFInfo
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- CN1622230A CN1622230A CN 200410093181 CN200410093181A CN1622230A CN 1622230 A CN1622230 A CN 1622230A CN 200410093181 CN200410093181 CN 200410093181 CN 200410093181 A CN200410093181 A CN 200410093181A CN 1622230 A CN1622230 A CN 1622230A
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- rare earth
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Abstract
The high temperature resistant RE magnet composition consists of RE magnetic powder 85-98 wt% and high temperature resistant resin 2-15 wt%. The RE magnetic powder is R-T-B, R-T-N, R-T-M-N or their composition in any ratio. The high temperature resistant RE magnet composition may be used in high temperature up to 150-180 deg.c, and has excellent magnetic characteristic, mechanical characteristic and corrosion resistance at the high temperature. The high temperature resistant RE magnet composition has breaking strength of 50-100 N/sq mm, Vicat softening point of 150-300 deg.c and excellent anticorrosive characteristic.
Description
Technical field
The present invention relates to a kind of high temperature resistant rare earth magnet composition, and with this high temperature resistant rare earth magnet composition by mixing, compression or injection moulding form the high temperature resistant rare earth bonded permanent magnet.
Technical background
Rare earth-like bonded permanent magnet is to use the mixture of rare earth magnet powders and organic binder bond, it is added the magnet that is pressed into desired shape, manufacturing process adopts die forming, injection moulding or extrusion molding, bonded permanent magnet is with the control of its accurate dimensions, complicated magnet shape, the changeable mode that magnetizes, stable corrosion resistance characteristic and advantageous characteristic such as assembly formation easily, and is widely used among the small and special electric machine.Outside the deaeration turner is already used, the temperature environment that bonded permanent magnet is used mostly near room temperature (as, the patent No. be 96121941.6 patent disclosure a kind of rare earth-like bonded permanent magnet and rare earth magnet composition), maximum operation (service) temperature is exceeded with 80～100 ℃, the heatproof characteristic that adds the macromolecular material that is suitable for doing the magnet binding agent is not high, thus at present the bonding NdFeB magnet of higher serviceability temperature still not by large-scale development and application.
Summary of the invention
First technical problem to be solved by this invention provides a kind of high temperature resistant rare earth magnet composition, and with this high temperature resistant rare earth magnet composition by mixing, compression or injection moulding form the high temperature resistant rare earth bonded permanent magnet, this magnet can use in 150 ℃～200 ℃, and at high temperature has good magnetic characteristic, mechanical property, corrosion resistance characteristic.
In order to solve the problems of the technologies described above, the invention provides a kind of high temperature resistant rare earth magnet composition, it contains rare earth magnet powders, fire resistant resin, the percentage by weight 85～98% of selected rare earth magnet powders content, the percentage by weight 15～10% of selected fire resistant resin content; Wherein, described rare earth magnet powders is selected from following component:
First kind of component is R-T-B, and it comprises:
R refers to based on Nd, comprises at least a rare earth element or Y;
T refers to Fe to be the transition metal of principal component;
B is meant chemical element boron.
Second kind of component is R-T-N, and it comprises:
R refers to based on Sm, comprises at least a rare earth element or Y
T refers to Fe to be the transition metal of principal component; With
Contain the interstitial element that N, C are main component;
The third component is R-T-M-N, and it comprises:
R refers to based on Nd, comprises at least a rare earth element or Y
T refers to Fe to be the transition metal of principal component
M is meant Ti, V, Mo, Zr; With
Contain the interstitial element that N, C are main component.
Adopt method of the present invention, can produce the high temperature resistant rare earth bonded permanent magnet that can use in 150 ℃～180 ℃, it can at high temperature have good magnetic characteristic, mechanical property, corrosion resistance characteristic.By method of the present invention, the cut-out intensity 50～100N/mm of produced high temperature resistant rare earth bonded permanent magnet
2, 150 ℃～300 ℃ of dimension card heat resisting temperatures, and have good corrosion resistance characteristic.
Embodiment
Below in conjunction with several specific embodiments, describe concrete formation of the present invention and method in detail.
Rare-earth bond magnet of the present invention contains rare earth magnet powders, fire resistant resin, can also contain reinforcing agent, plasticizer as required.
1, rare earth magnet powders
Rare earth magnet powders is preferentially selected the magnetic that is made of the alloy that contains rare earth element and transition metal for use, the magnetic of particularly following (1)-(3).
(1) based on Nd, comprise at least a rare earth element or Y, with Fe the magnetic of the transition metal of principal component as basis, B is meant chemical element boron (being called for short R-T-B).
(2) based on Sm, comprise at least a rare earth element or Y, with Fe the transition metal of principal component and to contain N, C be the interstitial element of main component as the magnetic (being called for short R-T-N) of basis.
(3) based on Nd, comprise at least a rare earth element or Y, be that transition metal, the M of principal component is meant TI with Fe, V, Mo, Zr; With containing N, C is the magnetic (be called for short R-T-M-N) of the interstitial element of main component as basis.
(4) composition that mixes with above-mentioned three kinds of magnetic arbitrary proportions.
2, fire resistant resin
Fire resistant resin adopts resistant to elevated temperatures thermoplastic resin or thermosetting resin commonly used.
The thermoplastic resin that is suitable for can adopt: polyamide (heat resisting temperature is greater than 200 ℃), polyphenylene sulfide (PPS), liquid crystal polymer etc., adding proportion adopts bisphenol-A/F type epoxy resin, phenol aldehyde type epoxy resin, orthoresol resin epoxy resin at the described thermosetting resin of 2%～15% (weight ratio), and this thermosetting resin is heat-resisting more than 120 ℃ because of energy after changing.Adding proportion is in 1%～5% (weight ratio).
3, plasticizer
When adopting thermoplastic resin, also need add plasticizer, adding proportion 0.01～0.8%.Described plasticizer is selected from dimethanol dibenzoate, diisobutyl phthalate, three methyl alcohol, two positive heptanoates, stearic acid, zinc stearate or the like.
4, reinforcing agent
The reinforcing agent that is suitable for is a kind of or wherein two or more composition in carbon fiber, glass fibre, the whisker.Need select the fiber of suitable draw ratio, the whisker of suitable granularity when mixing, above-mentioned reinforcing agent be disperseed, guarantee the effect of mixing by peculiar method.The adding proportion 0.01%～5% of described reinforcing agent.
The following describes the manufacture method of rare earth-like bonded permanent magnet of the present invention:
(1) injection moulding
Use mixing roll will contain rare earth magnet powders and thermoplastic resin, plasticizer, also to contain the rare-earth bond magnet of reinforcing agent in case of necessity fully mixing with composition (mixture), obtain mixing thing, the mixing thing that obtains is packed in the injection barrel of injection machine, be heated to more than the fusion temperature of thermoplastic resin, make it fusing, described thermoplastic resin fusing point is at 300～400 ℃; In magnetic field or do not have under the condition in magnetic field above-mentioned fused mass to be injected in the metal pattern of this injection machine, the temperature in this moment injection tube is advisable at 250～350 ℃, and the temperature of metal pattern is advisable at 70～200 ℃.
Then, the body cooling curing obtains the rare earth-like bonded permanent magnet of desirable shape and size.
(2) die forming
Use mixing roll will contain rare earth magnet powders and thermosetting resin, curing agent, also to contain the rare-earth bond magnet of reinforcing agent in case of necessity fully mixing with composition (mixture), obtains mixing thing; Mixing thing is filled in the metal die of forcing press, pressurization compression obtains the magnet that is shaped, and then the magnet heating being made as binding resin thermosetting resin cured becomes final magnet.Because die forming magnet resin content can be less, is beneficial to and obtains the higher magnet of magnetic property.
Adopt the form of tabulation below, specific embodiments of the invention are described.Table 1 has been listed the concrete component of the rare earth magnet of 8 specific embodiments, and table 2 has been listed the process conditions of the manufacturing of corresponding magnet, and table 3 has been listed shape, size, composition, outward appearance and the various performance of the respective magnet that draws.
Table 1
| Form (wt%) | |
| Embodiment 1 | Magnetic (1): 89.5% PPS: 10% plasticizer: 0.5% |
| Embodiment 2 | Magnetic (1): 89.5% PPS: 9.8% plasticizer: 0.5% carbon fibre: 0.2% |
| Embodiment 3 | Magnetic (1): 89.5% PPS: 9.8% plasticizer: 0.5% glass: 0.2% |
| Embodiment 4 | Magnetic (1): 89.5% PPS: 9.8% plasticizer: 0.5% whisker: 0.2% |
| Embodiment 5 | Magnetic (1): 89% heat-resistant polyamide: 11%: plasticizer: carbon fibre: |
| Embodiment 6 | Magnetic (1): 97% epoxy resin (Gu): 3% |
| Embodiment 7 | Magnetic (1): 97% epoxy resin (Gu): 2.9% carbon fibre: 0.1% |
| Embodiment 8 | Magnetic (1): 97% epoxy resin (Gu): 2.9% whisker: 0.1% |
| Embodiment 9 | Magnetic (1): 97% epoxy resin (Gu): 2.45% stearic acid: 0.4% carbon fibre: 0.15% |
| Embodiment 10 | Magnetic (1): 98.4% epoxy resin (liquid): 1.3% whisker: 0.3% |
Table 2
| The condition of mixing | Molding condition | ||||
| Mix temperature (℃) | The intensity of mixing (moment of torsion ratio %) | Manufacturing process | The charging basket heter temperature (℃) | Mold temperature (℃) | |
| Embodiment 1 | ?310 | ?30 | Injection moulding | 320 | ?140 |
| Embodiment 2 | ?310 | ?35 | Injection moulding | 320 | ?140 |
| Embodiment 3 | ?310 | ?35 | Injection moulding | 320 | ?140 |
| Embodiment 4 | ?320 | ?30 | Injection moulding | 320 | ?140 |
| Embodiment 5 | ?300 | ?15 | Injection moulding | 320 | ?140 |
| Embodiment 6 | Room temperature | ?- | Die forming | Pressure: 12t/cm2 | Room temperature |
| Embodiment 7 | Room temperature | ?- | Die forming | Pressure: 12t/cm2 | Room temperature |
| Embodiment 8 | Room temperature | ?- | Die forming | Pressure: 12t/cm2 | Room temperature |
| Embodiment 9 | Room temperature | - | Die forming | Pressure: 12t/cm2 | Room temperature |
| Embodiment 10 | Room temperature | - | Die forming | Pressure: 6t/cm2 | Room temperature |
Table 3
| Magnet shape (mm) | Magnetic energy product (BH) max (MGOe) | Density | Outward appearance | Cut off intensity (N/mm2) | Dimension card heat resisting temperature (℃) | Corrosion resistance | |
| Embodiment 1 | External diameter: 12.4 wall thickness: 1.7 length: 5.7 | ????5.5 | 5. 06 | Well | 85 | ?260 | Well |
| Embodiment 2 | External diameter: 12.4 wall thickness: 1.7 length: 5.7 | ????5.4 | 5. 04 | Well | 93 | ?265 | Well |
| Embodiment 3 | External diameter: 12.4 wall thickness: 1.7 length: 5.7 | ????5.6 | 5. 05 | Well | 95 | ?265 | Well |
| Embodiment 4 | External diameter: 12.4 wall thickness: 1.7 length: 5.7 | ????5.5 | 5. 08 | Well | 87 | ?263 | Well |
| Embodiment 5 | External diameter: 12.4 wall thickness: 1.7 length: 5.7 | ??5.1 | ?4.8 | Well | 93 | ?268 | Well |
| Embodiment 6 | External diameter: 22 wall thickness: 2 length: 4.5 | ?10.5 | ?6.17 | Well | 68 | ?213 | Well |
| Embodiment 7 | External diameter: 22 wall thickness: 2 length: 4.5 | ?10.5 | ?6.15 | Well | 71 | ?221 | Well |
| Embodiment 8 | External diameter: 22 wall thickness: 2 length: 4.5 | ?10.5 | ?6.18 | Well | 71 | ?226 | Well |
| Embodiment 9 | External diameter: 22 wall thickness: 2 length: 4.5 | ?10.5 | ?6.10 | Well | 76 | ?217 | Well |
| Embodiment 10 | External diameter: 22 wall thickness: 2 length: 4.5 | ?10.5 | ?6.38 | Well | 83 | ?239 | Well |
Claims (9)
1, a kind of high temperature resistant rare earth magnet composition is characterized in that, it contains rare earth magnet powders, fire resistant resin, the percentage by weight 85～98% of selected rare earth magnet powders content, the percentage by weight 15～2% of selected fire resistant resin content; Wherein, described rare earth magnet powders is selected from following component:
First kind of component is R-T-B, and it comprises:
R refers to based on Nd, comprises at least a rare earth element or Y;
T refers to Fe to be the transition metal of principal component;
B is meant chemical element boron.
Second kind of component is R-T-N, and it comprises:
R refers to based on Sm, comprises at least a rare earth element or Y
T refers to Fe to be the transition metal of principal component; With
Contain the interstitial element that N, C are main component;
The third component is R-T-M-N, and it comprises:
R refers to based on Nd, comprises at least a rare earth element or Y
T refers to Fe to be the transition metal of principal component
M is meant Ti, V, Mo, Zr; With
Contain the interstitial element that N, C are main component.
And the composition that mixes with above-mentioned three kinds of magnetic arbitrary proportions.
2, high temperature resistant rare earth magnet composition according to claim 1 is characterized in that, comprises reinforcing agent in addition, the percentage by weight 0.01%～5% of its addition
3, high temperature resistant rare earth magnet composition according to claim 1 is characterized in that, also comprises plasticizer, and the percentage by weight of its addition is 0.01～2%
4, high temperature resistant rare earth magnet composition according to claim 1 is characterized in that, described fire resistant resin can be thermoplastic resin or thermosetting resin.
5. high temperature resistant rare earth magnet composition according to claim 4 is characterized in that described thermoplastic resin is selected from polyamide, polyphenylene sulfide, liquid crystal polymer.
6, high temperature resistant rare earth magnet composition according to claim 4 is characterized in that, described thermosetting resin is selected from bisphenol-A/F type epoxy resin, phenol aldehyde type epoxy resin, orthoresol resin epoxy resin.
7, high temperature resistant rare earth magnet composition according to claim 2 is characterized in that, described reinforcing agent is a kind of or wherein two or more composition in glass pricker, carbon fibre, the whisker.
8, high temperature resistant rare earth magnet composition according to claim 3 is characterized in that, described plasticizer is selected from dimethanol dibenzoate, diisobutyl phthalate, three methyl alcohol, two positive heptanoates, stearic acid, zinc stearate or the like.
9, a kind of high temperature resistant rare earth bonded permanent magnet is characterized in that, its by the arbitrary described high temperature resistant rare earth mixture of claim 1～8 by mixing, compression or injection moulding, its stable for a long time maximum temperature of using is 150 ℃～200 ℃.
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| CN 200410093181 CN1622230A (en) | 2004-12-17 | 2004-12-17 | High temperature resistant rare earth magnet composition and magnet |
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| CN 200410093181 CN1622230A (en) | 2004-12-17 | 2004-12-17 | High temperature resistant rare earth magnet composition and magnet |
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Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103567446A (en) * | 2012-07-30 | 2014-02-12 | 比亚迪股份有限公司 | Toughening-type rare earth permanent-magnetic material and preparation method thereof |
| CN103762069A (en) * | 2014-01-06 | 2014-04-30 | 麦格昆磁（天津）有限公司 | Bonded permanent magnet and production method thereof |
| CN106340365A (en) * | 2016-08-10 | 2017-01-18 | 横店集团东磁股份有限公司 | Injection molding nylon 12 and rare-earth permanent magnet granular material and preparation method thereof |
| CN106448988A (en) * | 2015-08-04 | 2017-02-22 | 青岛金立磁性材料有限公司 | Ferrite-neodymium iron boron composite injection molding granular material and preparation method thereof |
| CN106448997A (en) * | 2015-08-04 | 2017-02-22 | 青岛金立磁性材料有限公司 | Strontium ferrite injection molding granular material and preparation method thereof |
| CN106816251A (en) * | 2017-03-08 | 2017-06-09 | 安徽省东方磁磁铁制造有限公司 | A kind of High Performance Bonded NdFeB Permanent Magnet and preparation method thereof |
| CN107603220A (en) * | 2017-09-14 | 2018-01-19 | 横店集团东磁股份有限公司 | A kind of PPS rare earth permanent magnets injection particle masterbatch and preparation method thereof |
| CN107619603A (en) * | 2017-11-08 | 2018-01-23 | 绵阳美胜邦科技有限公司 | A kind of corrosion-resistant high toughness polyphenyl thioether rare earth composite material and preparation method thereof |
-
2004
- 2004-12-17 CN CN 200410093181 patent/CN1622230A/en active Pending
Cited By (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103567446A (en) * | 2012-07-30 | 2014-02-12 | 比亚迪股份有限公司 | Toughening-type rare earth permanent-magnetic material and preparation method thereof |
| CN103762069A (en) * | 2014-01-06 | 2014-04-30 | 麦格昆磁（天津）有限公司 | Bonded permanent magnet and production method thereof |
| CN103762069B (en) * | 2014-01-06 | 2016-08-31 | 麦格昆磁（天津）有限公司 | Bonded permanent magnet and preparation method thereof |
| CN106448988A (en) * | 2015-08-04 | 2017-02-22 | 青岛金立磁性材料有限公司 | Ferrite-neodymium iron boron composite injection molding granular material and preparation method thereof |
| CN106448997A (en) * | 2015-08-04 | 2017-02-22 | 青岛金立磁性材料有限公司 | Strontium ferrite injection molding granular material and preparation method thereof |
| CN106340365A (en) * | 2016-08-10 | 2017-01-18 | 横店集团东磁股份有限公司 | Injection molding nylon 12 and rare-earth permanent magnet granular material and preparation method thereof |
| CN106816251A (en) * | 2017-03-08 | 2017-06-09 | 安徽省东方磁磁铁制造有限公司 | A kind of High Performance Bonded NdFeB Permanent Magnet and preparation method thereof |
| CN106816251B (en) * | 2017-03-08 | 2019-06-18 | 安徽省东方磁磁铁制造有限公司 | A kind of High Performance Bonded NdFeB Permanent Magnet and preparation method thereof |
| CN107603220A (en) * | 2017-09-14 | 2018-01-19 | 横店集团东磁股份有限公司 | A kind of PPS rare earth permanent magnets injection particle masterbatch and preparation method thereof |
| CN107619603A (en) * | 2017-11-08 | 2018-01-23 | 绵阳美胜邦科技有限公司 | A kind of corrosion-resistant high toughness polyphenyl thioether rare earth composite material and preparation method thereof |
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