CN100461307C - Binding samarium-iron-nitrogen, neodymium-iron-nitrogen, ferrite permanent-magnet powder compound permanent-magnet material and its preparation method - Google Patents
Binding samarium-iron-nitrogen, neodymium-iron-nitrogen, ferrite permanent-magnet powder compound permanent-magnet material and its preparation method Download PDFInfo
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- CN100461307C CN100461307C CNB2005100219448A CN200510021944A CN100461307C CN 100461307 C CN100461307 C CN 100461307C CN B2005100219448 A CNB2005100219448 A CN B2005100219448A CN 200510021944 A CN200510021944 A CN 200510021944A CN 100461307 C CN100461307 C CN 100461307C
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Abstract
A composite permanent-magnet material is prepared from 83-98.9 wt% of mixed magnetic power formed by Sm-Fe-N2 and Nb-Fe-N2 as well as Ferrite permanent-magnet powder, 1-15 wt% of high polymer binder and 0.1-2 wt% of assistant and the preparation of said mixed magnetic powder is 2-96 wt% of Sm-Fe-N2 permanent-magnet powder, 2-96 wt % of Nb-Fe-N2 permanent - magnetic powder and 2-96 wt% of Ferrite permanent-magnet powder. The method for preparing said material is also disclosed.
Description
Technical field
The invention belongs to binding electromagnetic material, particularly three kinds of binding electromagnetic materials that permanent magnetic alloy powder is composited.
Background technology
The nineties in 20th century, professor Yang Yingchang of China has reported that China has the NdFe of independent intellectual property right
12N
xThe type rare earth permanent-magnetic material, to have a content of rare earth few because of it, do not contain expensive doping metals such as cobalt again, and the cost of raw material of unit product is than neodymium iron boron low (approximately low 30%); Residual magnetic flux density, magnetic energy product height and stronger characteristics such as anti-oxidant and resistance to corrosion, thereby be subjected to domestic and international concern.Calendar year 2001, NdFe
12N
xThe type rare earth permanent magnet powder has been realized suitability for industrialized production in succession, because it is because sintering process can cause nitrogen to break away from lattice, therefore can only be used to make various bonded permanent magnets, comprise injection moulding, compression molding, calendering formation, extrusion molding magnet, its performance all is much higher than ferrite.
Adopt NdFe at present
12N
xThe bonded permanent magnet that replaces the NdFeB preparation, and by NdFe
12N
xWith the compound compoiste adhering magnet that is prepared into of ferrite, though have greatly improved at aspects such as anti-oxidant, corrosion-resistant and prices, because NdFe
12N
xThe coercive force of permanent-magnet powder is on the low side (about 400kA/m), and the coercive force of ferrite permanent-magnet is lower, and is indifferent by the anti-external magnetic field interference of their preparation bonded permanent magnet and built-up magnets thereof etc., thereby limited its application.In order to improve its HCJ, enlarge application in the novel permanent magnetic material industry of this high performance-price ratio, though can adopt at NdFe
12N
xWith the way that adds the NdFeB magnetic in the ferrite composite permanent-magnetic material, but on physical characteristic, the existence of NdFeB magnetic is easy to oxidation, be easy to defectives such as corrosion, obtain good serviceability and have in preparation process, increase operations such as anticorrosion, anti-oxidation, thereby cause fringe cost to rise; Present in addition fast quenching NdFeB magnetic is flakey more, and particle is thick, is difficult to same NdFe
12N
xMix with ferrite composite permanet magnet powder, this brings variety of problems can for follow-up technology, and often there are many technological deficiencies in the magnet of preparation.
People such as nineteen ninety Coey find Sm
2Fe
17N
xThe type compound has excellent permanent magnetism performance, has and NdFe
12N
xThe characteristics that the type rare earth permanent magnet powder is similar, and NdFe
12N
xType permanent magnetism powder is compared it and is had higher HCJ (isotropic Sm of HDDR method preparation
2Fe
17N
xThe coercive force of magnetic can reach 1600kA/m).Because Sm
2Fe
17N
xThe same NdFe of the corrosion-resistant and oxidation resistant ability of type rare earth permanent magnet powder
12N
xMagnetic is suitable, as adding NdFe to its alternative NdFeB magnetic
12N
xIn the ferrite composite permanent-magnetic material, can when not reducing the corrosion-resistant and oxidation resistance of built-up magnet, solve NdFe
12N
xWith the low problem of ferrite composite permanent-magnetic material coercive force; The granularity of 2:17 type nitride magnetic powder and NdFe in addition
12N
xMagnetic and ferrite permanent-magnet powder are suitable, and they very easily realize even mixing, and this haves laid a good foundation for follow-up technology, can effectively reduce the defective of the built-up magnet of preparation.
As seen, by NdFe
12N
x, ferrite and Sm
2Fe
17N
xThe composite permanent-magnetic material that type permanent magnetism powder is formed not only has excellent intrinsic performance, and relative low price, have high temperature resistant again, the ability of anticorrosive and oxidation, particularly by adjusting the proportioning of mixing magnetic, realizability can be with price adjustable, the scope of application is extensive, is a kind of composite permanent-magnetic material of the wide market prospects that have.
Summary of the invention
The present invention is directed to the deficiency that prior art exists, a kind of new bonded permanent magnet composite material and preparation method thereof is provided, the permanent-magnetic composite materials of this method preparation not only has excellent intrinsic performance, and cheap, has the ability of high temperature resistant, anticorrosive and oxidation again.
The present invention relates to a kind of binding samarium-iron-nitrogen, neodymium iron nitrogen and ferrite permanent-magnet powder compound permanent-magnet material, it is characterized in that this composite permanent-magnetic material forms by mixing magnetic, high polymer binder and auxiliary agent, wherein mixing magnetic is made up of samarium iron nitrogen permanent magnetism powder, neodymium iron nitrogen permanent magnetism powder and ferrite permanent-magnet powder, auxiliary agent is made up of coupling agent, lubricant, age resister, mixes magnetic and coats processing with coupling agent.
Technical scheme of the present invention is: the mixing magnetic of samarium iron nitrogen rare earth permanent magnet powder, neodymium iron nitrogen permanent magnetism powder and ferrite permanent-magnet powder is after abundant mechanical agitation, mixing, coat processing with coupling agent, add binding agent then and additive mixes, and final molding is a composite permanent magnet.
The forming method of above-mentioned cohesive composite permanent magnetic material comprises: compression molding, injection moulding, extrusion molding and calendering formation.
The auxiliary agent content that adopts in the preparation process of above-mentioned cohesive composite permanent magnetic material is in 0.1～2% (percetage by weight), and wherein, coupling agent is silane series or metatitanic acid acid fat series, and its content is in 0.1-1% (percetage by weight); The additive that adopts comprises lubricant and age resister, and wherein, lubricant is stearic acid or stearate.
The binding agent that adopts in the preparation process of above-mentioned cohesive composite permanent magnetic material is that high polymer binder can be selected at least a in epoxy resin, phenolic resins, metatitanic acid diallyl, natural and asynthetic rubber, nylon series etc. for use, and its content is 1～15% (percetage by weight).
Mixing particle content in the above-mentioned cohesive composite permanent magnetic material is in 83～98.9% (percetages by weight), wherein samarium iron nitrogen rare earth permanent magnet powder is any one commercially available SmFeN permanent magnetism powder, neodymium iron nitrogen permanent magnetism powder is any one commercially available NdFeN permanent magnetism powder, ferrite permanent-magnet powder is any one commercially available ferrite permanent-magnet powder, and the prescription of the mixing magnetic of samarium iron nitrogen, neodymium iron nitrogen, the compound body forever of ferrite (percentage meter by weight) is:
Samarium iron nitrogen rare earth permanent magnet powder 2%～96%
Neodymium iron nitrogen rare earth permanent magnet powder 2%～96%
Ferrite permanent-magnet powder 2%～96%
The present invention is owing to adopt samarium iron nitrogen rare earth permanent magnet powder, neodymium iron nitrogen permanent magnetism powder and ferrite permanent-magnet powder as raw material, and built-up magnet has the interference performance of good anti-external magnetic field; And cheap, have again high temperature resistant, the ability of anticorrosive and oxidation, particularly by adjusting the proportioning of mixing magnetic, what realizability can be with price is adjustable.In a word, the present invention is applicable to fields such as automobile making, household electrical appliance, small and special electric machine, instrument and meter.
Embodiment
Embodiment 1:
The prescription that mixes magnetic in the present embodiment is isotropism Sm
2Fe
17N
x(x3) magnetic 80% (percetage by weight), (its molecular formula is BaO.6Fe to barium ferrite permanent magnetism powder
2O
3) 10% (percetage by weight), isotropism NdFe
12N
x(x3) rare earth permanent magnet powder 10% (percetage by weight); Binding agent is selected epoxy resin for use, and content is 1.5% (percetage by weight), and the content that mixes magnetic is 98.4% (percetage by weight); Mix magnetic and coat processing, add epoxy adhesive then and the stearic acid mix lubricant is even with silane, compression moulding on press, briquetting pressure is elected 8T as, and formed body all is the standard specimen of ф 10 * 10mm.The density of composite permanent-magnetic material is 5.75g/cm
3, magnetic property is remanent magnetism Br=0.57T, magnetic strength coercivity H b=380kA/m, HCJ H
Cj=870kA/m, maximum magnetic energy product (BH) m=58kA/m
3
Embodiment 2:
The prescription that mixes magnetic in the present embodiment is that percetage by weight is 50% anisotropy NdFe
12N
x(x3) magnetic, 20% anisotropic Sm
2Fe
17N
x(x3) (molecular formula is SrO.6Fe for magnetic and strontium ferrite permanent magnet powder
2O
3) 30% (percetage by weight); Binding agent is selected epoxy resin for use, and content is 1.3% (percetage by weight), and the content that mixes magnetic is 98.5% (percetage by weight); Mix magnetic and coat processing, add epoxy adhesive then and the zinc stearate mix lubricant is even with metatitanic acid fat, compression moulding on press again after the orientation, briquetting pressure is elected 8T as, and formed body all is the standard specimen of ф 10 * 10mm.The density of composite permanent-magnetic material is 6.07g/cm
3, magnetic property is remanent magnetism Br=0.73T, magnetic strength coercive force H
Cb=289kA/m, HCJ H
Cj=634kA/m, maximum magnetic energy product (BH)
m=74kJ/m
3
Embodiment 3:
In the present embodiment, adopting percentage by weight is that (molecular formula is SrO.6Fe for 80% strontium ferrite permanent magnet powder
2O
3), 5% anisotropic NdFe
12N
x(x3) magnetic and 15% anisotropic Sm
2Fe
17N
x(x3) the mixing magnetic of magnetic, putting into Z type kneader mixes, the silane of weight ratio 0.3% is after acetone diluted, add in the mode of spraying, adding percetage by weight at last is 9% nylon 6 and 0.2% age resister RD (2-dihyaroquinoline condensate), mix, the content that mixes magnetic is 90.5% (percetage by weight).Mixture is behind double-screw extruding pelletizing, and finally 250, injection molds magnet under the 120Mpa condition.The magnetic property of composite permanent magnet is remanent magnetism Br=0.38T, magnetic strength coercive force H
Cb=270kA/m, HCJ H
Cj=525kA/m, maximum magnetic energy product (BH) m=38kJ/m
3
Embodiment 4:
The prescription that mixes magnetic in the present embodiment is that percetage by weight is that (its molecular formula is BaO.6Fe to 50% barium ferrite permanent magnetism powder
2O
3), 30% isotropism Sm
2Fe
17N
x(x3) magnetic and isotropic NdFe of 20%
12N
x(x3) magnetic; Binding agent is selected phenolic resins for use, and content is 1.5% (percetage by weight), and the content that mixes magnetic is 98.4% (percetage by weight); Mix magnetic and coat processing, add phenolic resin adhesive then and the zinc stearate mix lubricant is even with silane, compression moulding on press, briquetting pressure is elected 10T as, and formed body all is the standard specimen of ф 10 * 10mm.The density of composite permanent-magnetic material is 5.8g/cm
3, magnetic property is remanent magnetism Br=0.51T, magnetic strength coercive force H
Cb=350kA/m, HCJ H
Cj=740kA/m, maximum magnetic energy product (BH)
m=47kJ/m
3
Embodiment 5:
In the present embodiment, adopting percentage by weight is that (its molecular formula is BaO.6Fe to 5% barium ferrite permanent magnetism powder
2O
3), 80% anisotropic NdFe
12N
x(x3) magnetic and 15% anisotropic Sm
2Fe
17N
x(x3) the mixing magnetic of magnetic is 5 kilograms, putting into Z type kneader mixes, 0.03 the silane of kilogram is after acetone diluted, add in the mode of spraying, add the zinc stearate lubricant of 0.6 kilogram of chlorinated polyethylene rubber, 0.02 kilogram of age resister SPH (styrenated phenol) and 0.02 kilogram at last, mix.Use mixer mixing at 100 times again, mixing with two rollers refinings again, mixingly adopt two roll calender compression moulding after last slice.The magnetic property of composite permanent-magnetic material is remanent magnetism Br=0.58T, magnetic strength coercive force H
Cb=362kA/m, HCJ H
Cj=713kA/m, maximum magnetic energy product (BH)
m=52kJ/m
3
Claims (5)
1. a binding samarium-iron-nitrogen, neodymium iron nitrogen and ferrite permanent-magnet powder compound permanent-magnet material, it is characterized in that this composite permanent-magnetic material forms by mixing magnetic, high polymer binder and auxiliary agent, wherein mixing magnetic is made up of samarium iron nitrogen permanent magnetism powder, neodymium iron nitrogen permanent magnetism powder and ferrite permanent-magnet powder, auxiliary agent is made up of coupling agent, lubricant, age resister, mixes magnetic and coats processing with coupling agent.
2. binding samarium-iron-nitrogen according to claim 1, neodymium iron nitrogen and ferrite permanent-magnet powder compound permanent-magnet material is characterized in that the mixing magnetic of percentage meter and the prescription of high polymer binder and auxiliary agent are by weight:
Mix magnetic 83%～98.9%
High polymer binder 1%～15%
Auxiliary agent 0.1-2%.
3. binding samarium-iron-nitrogen according to claim 1, neodymium iron nitrogen and ferrite permanent-magnet powder compound permanent-magnet material, the samarium iron nitrogen permanent magnetism powder that it is characterized in that mixing in the magnetic is that commercially available any one SmFeN permanent magnetism powder, neodymium iron nitrogen permanent magnetism powder is any one commercially available NdFeN permanent magnetism powder, ferrite permanent-magnet powder is any one commercially available ferrite permanent-magnet powder, and the prescription of the mixing magnetic of percentage meter is by weight:
Samarium iron nitrogen permanent magnetism powder 2%～96%
Neodymium iron nitrogen permanent magnetism powder 2%～96%
Ferrite permanent-magnet powder 2%～96%.
4. binding samarium-iron-nitrogen according to claim 1, neodymium iron nitrogen and ferrite permanent-magnet powder compound permanent-magnet material is characterized in that high polymer binder is: at least a in epoxy resin, phenolic resins, metatitanic acid diallyl, chlorination polymerising ethylene, natural and asynthetic rubber, the nylon series.
5. according to the preparation method of claim 1, claim 2, claim 3 or the described binding samarium-iron-nitrogen of claim 4, neodymium iron nitrogen and ferrite permanent-magnet powder compound permanent-magnet material, comprising: compression molding, injection moulding, extrusion molding and calendering formation.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNB2005100219448A CN100461307C (en) | 2005-10-25 | 2005-10-25 | Binding samarium-iron-nitrogen, neodymium-iron-nitrogen, ferrite permanent-magnet powder compound permanent-magnet material and its preparation method |
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|---|---|---|---|
| CNB2005100219448A CN100461307C (en) | 2005-10-25 | 2005-10-25 | Binding samarium-iron-nitrogen, neodymium-iron-nitrogen, ferrite permanent-magnet powder compound permanent-magnet material and its preparation method |
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| CN1956109A CN1956109A (en) | 2007-05-02 |
| CN100461307C true CN100461307C (en) | 2009-02-11 |
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|---|---|---|---|---|
| CN102360653B (en) * | 2011-06-08 | 2014-08-27 | 北矿磁材科技股份有限公司 | Flexible rare earth bonded magnet with roll anisotropy and manufacturing method thereof |
| CN102504534B (en) * | 2011-10-28 | 2013-10-02 | 四川大学 | Injection molding permanent magnet composite material containing polyphenylene sulfide and preparation method thereof |
| CN103515056B (en) * | 2012-06-26 | 2016-05-04 | 立讯精密工业股份有限公司 | Magnetic module |
| CN106312077B (en) * | 2015-06-23 | 2021-04-13 | 宁夏君磁新材料科技有限公司 | Preparation method of submicron anisotropic samarium-iron-nitrogen magnetic powder and hybrid bonded magnet thereof |
| CN107954707A (en) * | 2017-12-13 | 2018-04-24 | 江西伟普科技有限公司 | A kind of preparation method of the magnetic binding material with high heat conduction |
| CN108838387A (en) * | 2018-06-29 | 2018-11-20 | 四川理工学院 | A kind of lubricate mutually is BaFe12O9Novel 20CrMnTi based self lubricated composite material and preparation method thereof |
| CN111540558B (en) * | 2020-05-08 | 2022-02-18 | 横店集团东磁股份有限公司 | Composite soft magnetic material and preparation method thereof |
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| CN1658339A (en) * | 2004-11-09 | 2005-08-24 | 北矿磁材科技股份有限公司 | Cohesive composite permanent magnetic material containing neodymium iron nitrogen and its preparation method |
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Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1397621A (en) * | 2001-07-12 | 2003-02-19 | 住友金属矿山株式会社 | Resin bonding type compsn. for magnet and resin bonding type magnet using same |
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| CN1606104A (en) * | 2003-10-10 | 2005-04-13 | 爱知制钢株式会社 | Composite rare-earth anisotropic bonded magnet, composite rare-earth anisotropic bonded magnet compound, and methods for their production |
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