CN110415963A - The preparation method of anisotropy neodymium iron boron and samarium iron nitrogen mixing magnetic powder - Google Patents

The preparation method of anisotropy neodymium iron boron and samarium iron nitrogen mixing magnetic powder Download PDF

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Publication number
CN110415963A
CN110415963A CN201910752858.6A CN201910752858A CN110415963A CN 110415963 A CN110415963 A CN 110415963A CN 201910752858 A CN201910752858 A CN 201910752858A CN 110415963 A CN110415963 A CN 110415963A
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CN
China
Prior art keywords
powder
magnetic powder
iron boron
neodymium iron
samarium
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CN201910752858.6A
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Chinese (zh)
Inventor
赵威盛
赵立文
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Dongguan Haitian Magnetic Industry Co Ltd
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Dongguan Haitian Magnetic Industry Co Ltd
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Priority to CN201910752858.6A priority Critical patent/CN110415963A/en
Publication of CN110415963A publication Critical patent/CN110415963A/en
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    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01F—MAGNETS; INDUCTANCES; TRANSFORMERS; SELECTION OF MATERIALS FOR THEIR MAGNETIC PROPERTIES
    • H01F1/00—Magnets or magnetic bodies characterised by the magnetic materials therefor; Selection of materials for their magnetic properties
    • H01F1/01—Magnets or magnetic bodies characterised by the magnetic materials therefor; Selection of materials for their magnetic properties of inorganic materials
    • H01F1/03—Magnets or magnetic bodies characterised by the magnetic materials therefor; Selection of materials for their magnetic properties of inorganic materials characterised by their coercivity
    • H01F1/032—Magnets or magnetic bodies characterised by the magnetic materials therefor; Selection of materials for their magnetic properties of inorganic materials characterised by their coercivity of hard-magnetic materials
    • H01F1/04—Magnets or magnetic bodies characterised by the magnetic materials therefor; Selection of materials for their magnetic properties of inorganic materials characterised by their coercivity of hard-magnetic materials metals or alloys
    • H01F1/047—Alloys characterised by their composition
    • H01F1/053—Alloys characterised by their composition containing rare earth metals
    • H01F1/055—Alloys characterised by their composition containing rare earth metals and magnetic transition metals, e.g. SmCo5
    • H01F1/057—Alloys characterised by their composition containing rare earth metals and magnetic transition metals, e.g. SmCo5 and IIIa elements, e.g. Nd2Fe14B
    • H01F1/0571—Alloys characterised by their composition containing rare earth metals and magnetic transition metals, e.g. SmCo5 and IIIa elements, e.g. Nd2Fe14B in the form of particles, e.g. rapid quenched powders or ribbon flakes
    • H01F1/0575—Alloys characterised by their composition containing rare earth metals and magnetic transition metals, e.g. SmCo5 and IIIa elements, e.g. Nd2Fe14B in the form of particles, e.g. rapid quenched powders or ribbon flakes pressed, sintered or bonded together
    • H01F1/0578—Alloys characterised by their composition containing rare earth metals and magnetic transition metals, e.g. SmCo5 and IIIa elements, e.g. Nd2Fe14B in the form of particles, e.g. rapid quenched powders or ribbon flakes pressed, sintered or bonded together bonded together
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01F—MAGNETS; INDUCTANCES; TRANSFORMERS; SELECTION OF MATERIALS FOR THEIR MAGNETIC PROPERTIES
    • H01F1/00—Magnets or magnetic bodies characterised by the magnetic materials therefor; Selection of materials for their magnetic properties
    • H01F1/01—Magnets or magnetic bodies characterised by the magnetic materials therefor; Selection of materials for their magnetic properties of inorganic materials
    • H01F1/03—Magnets or magnetic bodies characterised by the magnetic materials therefor; Selection of materials for their magnetic properties of inorganic materials characterised by their coercivity
    • H01F1/032—Magnets or magnetic bodies characterised by the magnetic materials therefor; Selection of materials for their magnetic properties of inorganic materials characterised by their coercivity of hard-magnetic materials
    • H01F1/04—Magnets or magnetic bodies characterised by the magnetic materials therefor; Selection of materials for their magnetic properties of inorganic materials characterised by their coercivity of hard-magnetic materials metals or alloys
    • H01F1/047—Alloys characterised by their composition
    • H01F1/053—Alloys characterised by their composition containing rare earth metals
    • H01F1/055—Alloys characterised by their composition containing rare earth metals and magnetic transition metals, e.g. SmCo5
    • H01F1/059—Alloys characterised by their composition containing rare earth metals and magnetic transition metals, e.g. SmCo5 and Va elements, e.g. Sm2Fe17N2
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01F—MAGNETS; INDUCTANCES; TRANSFORMERS; SELECTION OF MATERIALS FOR THEIR MAGNETIC PROPERTIES
    • H01F41/00—Apparatus or processes specially adapted for manufacturing or assembling magnets, inductances or transformers; Apparatus or processes specially adapted for manufacturing materials characterised by their magnetic properties
    • H01F41/02—Apparatus or processes specially adapted for manufacturing or assembling magnets, inductances or transformers; Apparatus or processes specially adapted for manufacturing materials characterised by their magnetic properties for manufacturing cores, coils, or magnets
    • H01F41/0253—Apparatus or processes specially adapted for manufacturing or assembling magnets, inductances or transformers; Apparatus or processes specially adapted for manufacturing materials characterised by their magnetic properties for manufacturing cores, coils, or magnets for manufacturing permanent magnets

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  • Engineering & Computer Science (AREA)
  • Power Engineering (AREA)
  • Chemical & Material Sciences (AREA)
  • Crystallography & Structural Chemistry (AREA)
  • Inorganic Chemistry (AREA)
  • Manufacturing & Machinery (AREA)
  • Hard Magnetic Materials (AREA)

Abstract

A kind of preparation method of anisotropy neodymium iron boron and samarium iron nitrogen mixing magnetic powder, this method comprises the following steps: a, the neodymium iron boron anisotropic magnetic powder for being 78~79 by weight percent, the bonding agent that the samarium iron nitrogen powder that weight percent is 19~20 is 1.8~2 with weight percent mix；B, the mixture of neodymium iron boron anisotropic magnetic powder, samarium iron nitrogen powder and bonding agent is kneaded under vacuum state and argon gas protection, forms mixed powder；C, mixing magnetic powder is crushed and screened, obtains anisotropy neodymium iron boron through being bonded and samarium iron nitrogen mixing magnetic powder.Two kinds of high performance magnetic materials are organically combined as a whole by the present invention, give full play to respective advantage, are conducive to the two and combine closely, are conducive to magnetic field orientating, can effectively improve the comprehensive performance of magnet.

Description

The preparation method of anisotropy neodymium iron boron and samarium iron nitrogen mixing magnetic powder
[technical field]
The present invention relates to magnetic materials, more particularly to the preparation of a kind of anisotropy neodymium iron boron and samarium iron nitrogen mixing magnetic powder Method.
[background technique]
Neodymium iron boron meets contemporary electronic product phase short, small, light, thin direction and develops as a kind of high performance permanent-magnet material Trend, office automation devices, Denso machinery, audio-visual equipment, instrument and meter, miniature motor and metering it is mechanical, in hand Machine, CD-ROM, DVD-ROM driving motor, hard disk spindle motor HDD, other micro- special direct current generators and automation instrument etc. Field is applied extensively.Though Curie temperature is low however, Nd-Fe-B permanent magnet material has excellent magnetic property, some special Using upper, neodymium iron boron is unable to satisfy needs.Known another kind magnetic material samarium iron nitrogen is passed through by intermetallic compound R2Fe17 Cross R2Fe17Nx or R2Fe17NxH etc. of nitrogen treatment formation between ternarys or multi-element metal compound be that the rare earth permanent magnet of base phase closes Gold not only makes the unit-cell volume of Sm2Fe17 increase (3% or so), significantly improves Curie temperature (Tc=476 DEG C), and And having high saturation magnetization (Ms=1.54T) and big anisotropy field at room temperature, HA=14T, these all become The key property of excellent permanent-magnet material.Existing NdFeB material and samarium iron nitrogen are to be used alone, and are difficult to avoid that respective Limitation.Therefore, how the two to be organically combined as a whole, to play respective advantage, just becomes a kind of objective demand.
[summary of the invention]
Present invention seek to address that the above problem, and providing one kind can organically be combined as a whole two kinds of magnetic materials, fill Divide and display one's respective advantages, is conducive to the two and combines closely, be conducive to magnetic field orientating, each of the comprehensive performance of magnet can be effectively improved The preparation method of anisotropy neodymium iron boron and samarium iron nitrogen mixing magnetic powder.
To achieve the above object, the present invention provides the preparation side of a kind of anisotropy neodymium iron boron and samarium iron nitrogen mixing magnetic powder Method, this method comprises the following steps:
A, the neodymium iron boron anisotropic magnetic powder for being 78~79 by weight percent, the samarium iron nitrogen that weight percent is 19~20 The bonding agent that powder is 1.8~2 with weight percent mixes；
B, to the mixture of neodymium iron boron anisotropic magnetic powder, samarium iron nitrogen powder and bonding agent under vacuum state and argon gas protection It is kneaded, forms mixed powder；
C, mixing magnetic powder is crushed and screened, obtains anisotropy neodymium iron boron through being bonded and samarium iron nitrogen mixing magnetic powder.
In step a, the bonding agent is one of rubber, plastics, resin.
In step a, neodymium iron boron anisotropic magnetic powder and samarium iron nitrogen is added vacuumizing and being added in argon gas protection mixing machine Then powder is mixed 2~4 minutes with 280~320 revs/min of revolving speed, bonding agent is added and remixes 2~4 minutes, forms mixture.
In step b, neodymium iron boron anisotropic magnetic powder, samarium iron nitrogen are added in the kneading machine for vacuumizing and being filled with argon gas protection The mixture of powder and bonding agent, kneading machine were warming up to 85 DEG C of degree and are started with speed automatic operating 4~5 minutes of 30~40 revs/min It is kneaded, speed is down to 5~7 revs/min after being kneaded 4~6 minutes, is inverted with 5~7 revs/min of revolving speed and is cooled to 70~90 DEG C of degree Stalling then proceedes to be cooled to 40~60 DEG C when spending and starts to rotate forward with 5~7 revs/min, stalling when being cooled to 40 DEG C of degree or less, Form mixed powder.
In step c, the mixing magnetic powder after mixing is placed in screen-dividing machine and is crushed, under protection of argon gas by 212 microns of sieve Mesh screen point 20~40 minutes, obtains anisotropy neodymium iron boron and samarium iron nitrogen mixing magnetic powder.
In step a, the neodymium iron boron anisotropic magnetic powder for being 78.5 by weight percent, the samarium iron that weight percent is 19.5 The bonding agent that nitrogen powder is 1.9 with weight percent mixes.
Contribution of the invention is, efficiently solves the problems of the prior art.The present invention is by neodymium iron boron anisotropic Magnetic powder is organically combined as a whole with samarium iron nitrogen powder, wherein since the particle size of two kinds of materials is different, makes size after mixing Particle matches, and has filled up intergranular gap, has improved powder density.Due also to the shape of two kinds of material granules is different, so that Spherical samarium iron nitrogen particle is attached to above big neodymium iron boron particles, facilitates steering when magnetic field orientating.Due to NdFeB magnetic powder Performance it is high, Curie temperature is low and easy demagnetization, although and samarium iron nitrogen performance is relatively low, but coercivity is high, and Curie temperature is high, no Easily demagnetization.Thus two kinds of magnetic materials give full play to respective advantage, are conducive to the two and combine closely, are conducive to magnetic field orientating, can Effectively improve the comprehensive performance of magnet.
[specific embodiment]
The following example is further explanation of the present invention, is not limited in any way to the present invention.
Anisotropy neodymium iron boron of the invention includes neodymium iron boron anisotropic magnetic with the preparation method of samarium iron nitrogen mixing magnetic powder The mixing of powder and samarium iron nitrogen powder and bonding agent, crushing and screening after mixture is kneaded and is kneaded.Specific step is as follows:
S10: neodymium iron boron anisotropic magnetic powder, samarium iron nitrogen powder are mixed with bonding agent, by weight percentage Mixed proportion are as follows: neodymium iron boron anisotropic magnetic powder 78~79%, samarium iron nitrogen powder 19~20%, bonding agent 1.8~2.Preferably, Mixed proportion are as follows: neodymium iron boron anisotropic magnetic powder 78.5%, samarium iron nitrogen powder 19.5%, bonding agent 1.9.It is described in the present embodiment Bonding agent is epoxy resin.First to argon gas protection is vacuumized and be added in mixing machine, neodymium iron boron anisotropic magnetic powder is taken 570kg, samarium iron nitrogen powder 144kg, epoxy resin 14kg are added to the mixer, and are then mixed 2 minutes, are added with 300 revs/min of revolving speed Enter bonding agent to remix 2 minutes, forms the mixture of neodymium iron boron anisotropic magnetic powder, samarium iron nitrogen powder and epoxy resin.
S20: the mixing under vacuum state and argon gas protection to neodymium iron boron anisotropic magnetic powder, samarium iron nitrogen powder and bonding agent Object is kneaded, and mixed powder is formed.In the present embodiment, neodymium iron boron is added in the kneading machine for vacuumizing and being filled with argon gas protection The mixture of anisotropic magnet powder, samarium iron nitrogen powder and bonding agent, kneading machine was with speed automatic operating 5 minutes of 35 revs/min, heating Start to be kneaded to 85 DEG C of degree, is kneaded speed after five minutes and is down to 6 revs/min, inverted with 6 revs/min of revolving speed and be cooled to 80 DEG C of degree and stopped Turn, then proceed to be cooled to 50 DEG C when spending and start to rotate forward with 6 revs/min, be cooled to 40 DEG C of degree it is following when stalling, formation mixed powder Material.
S30: mixing magnetic powder is crushed and screened, anisotropy neodymium iron boron through being bonded and samarium iron nitrogen mixing magnetic are obtained Powder.In the present embodiment, the mixing magnetic powder after mixing is placed in screen-dividing machine and is crushed, crosses 212 microns of sieve under protection of argon gas Screening 30 minutes is carried out, anisotropy neodymium iron boron and samarium iron nitrogen mixing magnetic powder are obtained.The mixing magnetic powder can be used for make from it is each to Various types of anisotropy magnets that anisotropic neodymium iron boron and samarium iron nitrogen are constituted.
S40: screening is shut down after about 30 minutes, and recycling mixing magnetic powder, weighing simultaneously records.
Although being disclosed by above embodiments to the present invention, scope of protection of the present invention is not limited thereto, Under conditions of without departing from present inventive concept, deformation, the replacement etc. done to above each component will fall into right of the invention In claimed range.

Claims (6)

1. the preparation method of a kind of anisotropy neodymium iron boron and samarium iron nitrogen mixing magnetic powder, which is characterized in that it includes the following steps:
A, by weight percent be 78~79 neodymium iron boron anisotropic magnetic powder, weight percent be 19~20 samarium iron nitrogen powder with The bonding agent that weight percent is 1.8~2 mixes；
B, the mixture of neodymium iron boron anisotropic magnetic powder, samarium iron nitrogen powder and bonding agent is carried out under vacuum state and argon gas protection It is kneaded, forms mixed powder；
C, mixing magnetic powder is crushed and screened, obtains anisotropy neodymium iron boron through being bonded and samarium iron nitrogen mixing magnetic powder.
2. the method as described in claim 1, which is characterized in that in step a, the bonding agent is rubber, in plastics, resin It is a kind of.
3. the method as described in claim 1, which is characterized in that in step a, vacuumizing and be added in argon gas protection mixing machine Neodymium iron boron anisotropic magnetic powder and samarium iron nitrogen powder is added, is then mixed 2~4 minutes with 280~320 revs/min of revolving speed, is added viscous It connects agent to remix 2~4 minutes, forms mixture.
4. method as claimed in claim 3, which is characterized in that in step b, in the kneading machine for vacuumizing and being filled with argon gas protection The middle mixture that neodymium iron boron anisotropic magnetic powder, samarium iron nitrogen powder and bonding agent is added, kneading machine with 30~40 revs/min of speed from Dynamic operating 4~5 minutes, is warming up to 85 DEG C of degree and starts to be kneaded, and speed is down to 5~7 revs/min after mixing 4~6 minutes, with 5~7 turns/ Point revolving speed invert and is cooled to 70~90 DEG C of degree and stall, then proceed to be cooled to 40~60 DEG C when spending and opened with 5~7 revs/min Begin to rotate forward, stalling when being cooled to 40 DEG C of degree or less forms mixed powder.
5. the method as described in claim 1, which is characterized in that in step c, the mixing magnetic powder after mixing is placed in screen-dividing machine It crushes, is sieved 20~40 minutes by 212 microns of sieve under protection of argon gas, obtain anisotropy neodymium iron boron and mixed with samarium iron nitrogen Magnetic powder.
6. the method as described in claim 1, which is characterized in that in step a, by weight percent be 78.5 neodymium iron boron respectively to Anisotropic magnetic powder, the bonding agent that the samarium iron nitrogen powder that weight percent is 19.5 is 1.9 with weight percent mix.
CN201910752858.6A 2019-08-15 2019-08-15 The preparation method of anisotropy neodymium iron boron and samarium iron nitrogen mixing magnetic powder Pending CN110415963A (en)

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Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20030145910A1 (en) * 2001-11-09 2003-08-07 Hitachi Metals, Ltd. Permanent magnetic alloy and bonded magnet
CN101465188A (en) * 2008-07-22 2009-06-24 北矿磁材科技股份有限公司 Flexible rare-earth cementing magnet and method of manufacturing the same
CN102314990A (en) * 2010-07-08 2012-01-11 赵立文 Magnet and preparation method thereof
CN102832002A (en) * 2012-09-13 2012-12-19 北矿磁材科技股份有限公司 Environment-friendly halogen-free rare-earth composite magnetic material

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20030145910A1 (en) * 2001-11-09 2003-08-07 Hitachi Metals, Ltd. Permanent magnetic alloy and bonded magnet
CN101465188A (en) * 2008-07-22 2009-06-24 北矿磁材科技股份有限公司 Flexible rare-earth cementing magnet and method of manufacturing the same
CN102314990A (en) * 2010-07-08 2012-01-11 赵立文 Magnet and preparation method thereof
CN102832002A (en) * 2012-09-13 2012-12-19 北矿磁材科技股份有限公司 Environment-friendly halogen-free rare-earth composite magnetic material

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Application publication date: 20191105