CN104599833B - The rare-earth flexible magnetic stripe and its production method of a kind of high tenacity - Google Patents
The rare-earth flexible magnetic stripe and its production method of a kind of high tenacity Download PDFInfo
- Publication number
- CN104599833B CN104599833B CN201510023631.XA CN201510023631A CN104599833B CN 104599833 B CN104599833 B CN 104599833B CN 201510023631 A CN201510023631 A CN 201510023631A CN 104599833 B CN104599833 B CN 104599833B
- Authority
- CN
- China
- Prior art keywords
- rare
- ndfeb
- magnetic stripe
- agent
- flexible magnetic
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Active
Links
Landscapes
- Hard Magnetic Materials (AREA)
Abstract
The invention discloses the rare-earth flexible magnetic stripe and its production method of a kind of high tenacity, wherein, the component of the rare-earth flexible magnetic stripe of the high tenacity includes：NdFeB alloy magnetic powder 92wt% 97wt%, the 3wt% of binding agent 2, the 5wt% of processing aid 1, wherein, the NdFeB alloy magnetic powders include Dy elements or Tb elements, and the binding agent is F48 thermosetting phenolic epoxy resin, and the processing aid is coupling agent, coating agent, lubricant, curing agent and plasticizer, the coupling agent is titanate esters, and the coating agent is that concentration is the aromatic dicarboxylic acid of 0.2wt%.The rare-earth flexible magnetic stripe production method process is simple of the high tenacity that the present invention is provided, low cost, the rare-earth flexible magnetic stripe good mechanical property for being produced, with toughness very high, not easy to crack and quick-fried angle is capable of achieving large-scale automated production, high financial profit.
Description
Technical field
The present invention relates to technical field of magnetic materials, the rare-earth flexible magnetic stripe and its producer of more particularly to a kind of high tenacity
Method.
Background technology
Although rare-earth flexible permanent-magnet material comes out, the time is short, yield also less than agglomeration permanent magnetic material, because its have sintering,
Advantage not available for the manufacture methods such as casting, thermal deformation so that binding electromagnetic material quickly grows, in the application of every field
Have a extensive future, extremely the attention of various countries' Permanent Magnet Material Industry.
Rare-earth flexible permanent-magnet material is important Metallic Functional Materials, using its energy translation function and the various physics of magnetic
Effect can be made the function element of diversified forms.The rare-earth flexible magnetic stripe being made can be widely applied to space flight navigation, information
Electronics, the energy, traffic, communication and Magnetotherapeutic health various fields, particularly, in recent years, due to the distinctive rush of rare-earth flexible magnetic stripe
The health-care effect of aspect such as enter blood circulation, improve the health care of sleep, in the market is more and more to the demand of flexible magnetic strips.
The tension of rareearth magnetic material, bending strength are relatively low, and its fracture toughness 1-2 numbers lower than ordinary metallic material
Magnitude, the Fracture Toughness with ceramic material is suitable.Toughness official post rare-earth magnet is during production, processing, transport, assembling etc.
Easily fall side arrisdefect, or even fracture；Poor toughness, also causes that toughness of material is poor, reduces the anti shock and vibration ability of material, influences
Material stability and security in use.The permanent magnet of poor toughness not only increases being produced into for rare earth permanent-magnetic material
This, and seriously constrain the application development of rare earth permanent-magnetic material.
In the prior art, the fracture toughness of material is improved by adding appropriate fibrous metal silk in magnetic.So
And, experiment shows, the addition of iron fiber not only can reduce the magnetic of magnetic material, and can drop coercivity and squareness
It is low, and add iron fiber and there is no the effect of any increase toughness, on the contrary decline the dynamics of magnetic material.Prior art is also
By adding the technical scheme that Cu elements improve the toughness of NdFeB permanent-magnet materials, however, with the addition of Cu elements, in sintering
During form the intermetallic compound NdFeCoCu of triangle state and enter into crystal boundary, improve the intensity of sintered body, but
With the increase of Cu contents, sintered body intermediate cam state mutually increases and causes stress concentration, and then causes rushing for NdFeB permanent-magnet materials
Hit toughness decline.
Method prior art also teaches the toughness of material is improved to other metals are added in rare earth permanent-magnetic material, example
Such as, Chinese invention patent CN1217551A is " a kind of high-performance rare-earth permanent magnet material and preparation method thereof ", is that will account for basic group
Into the additive D (D=Al of gross weight 0.05~2.0%203Or TiN) be added in R-Fe-M-B alloy powders, by mixed-powder
Compressing, sintering, heat treatment are obtained the rare earth permanent-magnetic material containing additive D.The material is primarily to reduce magnet cost
And use Al203Or the method for TiN additions, although both particles of addition can replace heavy rare earth element to a certain extent
Or heavy rare earth element oxide improves magnet coercivity, but both particles belong to high rigidity, brittle particle high, they plus
Enter the obdurability that can not improve magnet.
In addition, prior art also by dual alloy method improve material fracture toughness, but the complex process of the method and
And it is limited to the toughness improvement effect of material.
For this reason, it may be necessary to develop the rare-earth flexible magnetic stripe and its production method of a kind of new high tenacity.
The content of the invention
The technical problem that the present invention is solved is：Rare earth permanent-magnetic material poor toughness of the prior art, toughening modifying process
Middle modified effect is limited and complex process.Therefore, the present invention proposes the rare-earth flexible magnetic stripe and its production method of a kind of high tenacity,
Can fully eliminate due to one or more problems caused by the limitation of prior art and defect.
Additional advantages of the present invention, purpose and characteristic, a part will be elucidated in the following description, and another portion
Divide and be will be apparent by the investigation to following explanation for one of ordinary skill in the art or from implementation of the invention
Acquire.The present invention can be realized and obtained by the structure particularly pointed out in the specification and claims and accompanying drawing of word
Objects and advantages.
The invention provides a kind of production method of the rare-earth flexible magnetic stripe of high tenacity, the described method comprises the following steps：
Step 1, to Dy elements or Tb elements is added in NdFeB, forms NdFeB alloys；
Step 2, prepares the NdFeB alloy powders that average grain diameter is for 3-4 μm；Specifically, first with Quench belt-rejecting technology
NdFeB alloy sheets are prepared, then NdFeB alloy powders is obtained through broken, grinding；
Step 3, is surface-treated using coupling agent and coating agent to NdFeB alloy powders, and the coupling agent is metatitanic acid
Ester, the coating agent is aromatic dicarboxylic acid；Specifically include：It is the titanate esters first of 0.1wt% by NdFeB alloy powders and concentration
Benzole soln, concentration mix for the aromatic dicarboxylic acid of 0.2wt%, and are stirred with 400 revs/min with magnetic stirring apparatus at 100 DEG C
Half an hour；
Step 4, in masticator, the NdFeB alloy powders after surface treatment and binding agent and processing aid is kneaded equal
Even, melting temperature is 90-110 DEG C, and mixing time is 10-15 minutes, wherein the binding agent is F48 thermosetting phenolic asphalt mixtures modified by epoxy resin
Fat；
Step 5, will knead uniform material and is rolled into the sheet material that thickness is 2-3mm；
Step 6, sheet material is crushed in disintegrating machine, obtains the pellet of the screen cloth by 12 mesh；
Step 7, by extruder by pellet extrusion molding, obtains rare-earth flexible magnetic stripe, wherein, during extrusion molding
Apply the alignment magnetic field of 1.5T.
Preferably, the weight percent content of the Dy elements or Tb elements in NdFeB alloys is respectively 6% and 4%.
Preferably, in step 2, NdFeB alloy sheets are crushed by hydrogen broken method.
Preferably, the method for the grinding is airflow milling or ball milling.
Preferably, the processing aid in step 4 is lubricant, curing agent, plasticizer.
Preferably, the lubricant is polyvinyl butyral resin, and the curing agent is m-phenylene diamine (MPD), and the plasticizer is neighbour
Phthalates compound or epoxy compounds.
Present invention also offers a kind of rare-earth flexible magnetic stripe of high tenacity, the component of the rare-earth flexible magnetic stripe of the high tenacity
Including：NdFeB alloy magnetic powder 92wt%-97wt%, binding agent 2-3wt%, processing aid 1-5wt%, wherein, the NdFeB
Alloy magnetic powder includes Dy elements or Tb elements, and the binding agent is F48 thermosetting phenolic epoxy resin, and the processing aid is even
Connection agent, coating agent, lubricant, curing agent and plasticizer, the coupling agent is titanate esters, and the coating agent is for concentration
The aromatic dicarboxylic acid of 0.2wt%.
Preferably, the weight percent content of the Dy elements or Tb elements in NdFeB alloys is respectively 6% and 4%.
Preferably, the lubricant is polyvinyl butyral resin, and the curing agent is m-phenylene diamine (MPD), and the plasticizer is neighbour
Phthalates compound or epoxy compounds.
The rare-earth flexible magnetic stripe production method process is simple of the high tenacity that the present invention is provided, low cost, the rare earth for being produced
Flexible magnetic strips good mechanical property, with toughness very high, not easy to crack and quick-fried angle is capable of achieving large-scale automated production, warp
Ji high efficiency.
Brief description of the drawings
Fig. 1 is the flow chart of the production method according to the embodiment of the present invention, high tenacity rare-earth flexible magnetic stripe.
Specific embodiment
The present invention is described more fully with reference to the accompanying drawings, wherein illustrating exemplary embodiment of the invention.
Inventor combines on the basis of the work of substantial amounts of experimental study in actual production, finds the toughness of rare-earth flexible magnetic stripe
There is close relation with the auxiliary agent of the composition of material, the size of particle and addition, therefore, the present invention is emphatically by above-mentioned several
Individual aspect improves the toughness of rare-earth flexible magnetic stripe.
The present invention proposes a kind of production method of the rare-earth flexible magnetic stripe of high tenacity, and rareearth magnetic material of the invention is adopted
With NdFeB, the described method comprises the following steps：
Step 1, to additional elements are added in NdFeB, forms NdFeB alloys；
Preferably, the additional elements are Dy elements or Tb elements, and the Dy elements or Tb elements are in NdFeB alloys
In weight percent content be respectively 6% and 4%.
NdFeB magnets mainly constitute phase by 3：(1) the matrix phase Nd of polygonal shape2Fe14B, it is magnetic phase, is gold
Compound between category, is anisotropy tetragonal structure；(2) rich neodymium phase, typically exists with 3 kinds of existence forms：The first is edge
The borderline block richness neodymium phase of principal phase is embedded in, second is the continuously distributed lamelliform richness neodymium handed in grain boundary and crystal boundary at corner
Phase, the third is distributed across the rich neodymium phase of the disperse inside main phase grain.(3) boron-rich phase, often with isolate block (angle) shape or
Graininess is present on crystal boundary.This structure of alloy is favorably improved the magnetic behavior of magnet, but but has to terms of mechanics
Negative effect, rich neodymium therein primarily serves the effect of magnetic isolation with respect to crystal grain, it is possible to increase the magnetic of NdFeB permanent-magnet materials
Can, but the hardness of rich neodymium phase is relatively low, and micro-crack extends relatively easily wherein, and these laminar rich neodymiums are mutually to make NdFeB
Permanent-magnet material produces the major reason of grain boundary fracture.Therefore appropriate element is added in NdFeB permanent-magnet materials, improves rich neodymium phase
Composition and structure, the intensity of rich neodymium phase is improved, such that it is able to improve the mechanical property of NdFeB permanent-magnet materials.
The present invention is had found when the content of Dy elements or Tb elements in the NdFeB alloys is 4% by substantial amounts of experiment
When, the toughness of magnet can be significantly improved.Addition Dy elements or Tb elements can significantly improve the toughness of NdFeB permanent-magnet materials,
Because addition Dy elements or Tb elements improve the crystal boundary micro-structural of material, local bond strength is enhanced.
Step 2, prepares NdFeB alloy powders；
Specifically, preparing NdFeB alloy sheets first with Quench belt-rejecting technology, then NdFeB is obtained through broken, grinding
Alloy powder.
Preferably, the present invention is crushed NdFeB alloy sheets by the broken method of hydrogen, specifically, NdFeB alloys will be prepared
Thin slice is fitted into hydrogen crushing furnace, after vacuumizing, is filled with high-purity hydrogen, in the pressure of 0.02-1.2Mpa hydrogen, inhales hydrogen 0.5-5h, hears conjunction
The cracker of gold, while the temperature that can detect container is constantly being raised, this is to form hydrogenation after RE permanent magnetic alloy inhales hydrogen
Thing volumetric expansion and burst, then dehydrogenase 12-the 10h at 450-650 DEG C, obtains flour.
In the present invention, flour of the grinding by hydrogen after broken is further crushed, so as to complete the pulverizing process of alloy.It is described
The method of grinding is airflow milling or ball milling.Present invention preferably employs airflow milling.The method of airflow milling powder is people in the art
Well known to member, it is that powder particle is accelerated into supersonic speed using air-flow, is allowed to mutually head-on collision and crushes.With airflow milling magnetic
The increase of granularity, magnet bending strength is obviously reduced, and when granularity reduces, the magnetic property of magnet just weakens, and considers, this
The average grain diameter of the magnetic of invention is 3-4 μm.
Step 3, is surface-treated to NdFeB alloy powders；
Specifically, the present invention is surface-treated using coupling agent and coating agent to NdFeB alloy powders.
Coupling agent is indispensable in the preparation technology of magnet, therefore magnetic is hydrophilic, and is typically bonded
Agent is oil loving, and the effect of coupling agent is that magnetic and binding agent link together, so as to enhance magnetic with interlaminar resin
Affinity, improves the overlay capacity of magnetic surface resin, so as to improve magnetic property.In order that coupling agent is uniformly dispersed in magnetic,
The present invention mixes the organic solution and magnetic of coupling agent, preferably, the present invention selects titanate coupling agent, from dissolubility
Good toluene solution is used as solvent.If processing magnetic using excessive titanate coupling agent, can reduce between magnetic and binding agent
Adhesion, so as to influence humidification of the magnetic in bonded permanent magnet, causing the toughness of magnet reduces.Therefore, inventor passes through
Cross substantial amounts of experiment, selection coupling agent is titanate coupling agent, and titanate coupling agent organic solution is：Titanate coupling agent is dense
Spend the toluene solution for 0.1wt%.
In addition, the rare-earth flexible magnetic stripe border being made, it is easy to get rusty, therefore, it is surface-treated to NdFeB alloy powders
When be also added into be applied to as coating agent the aromatic dicarboxylic acid of various rings, prevent rare-earth flexible magnetic stripe from getting rusty.Make
For preferred, aromatic dicarboxylic acid is the mixture of phthalic acid or M-phthalic acid or said two devices.
Step 3 is specifically included：It is the titanate coupling agent toluene solution, dense of 0.1wt% by NdFeB alloy powders and concentration
Spend for the aromatic dicarboxylic acid of 0.2wt% mixes, and half an hours are stirred with 400 revs/min with magnetic stirring apparatus at 100 DEG C.
It is surface-treated by NdFeB alloy powders, one layer of organic protective film is formed on magnetic surface, is not only improved
Magnetic oxidation resistance in itself, also add the adhesion of magnetic and binding agent, can effectively improve the toughness of magnet.
Step 4, in masticator, the NdFeB alloy powders after surface treatment and binding agent and processing aid is kneaded equal
Even, melting temperature is 90-110 DEG C, and mixing time is 10-15 minutes；
From from the point of view of mechanical property, epoxide number binding agent high should be chosen, therefore, the present invention chooses F48 thermosettings
Property novolac epoxy resin as binding agent, with the toughness of enhancing magnet.The consumption of binding agent is very few, can cause the pressure resistance of magnet
Degree is low；The consumption of bonding is excessive, and magnet entirety plasticity can be caused to increase.Consider magnetic property and machinery of the binding agent to magnet
Influence of both intensity, the consumption of the binding agent that the present invention is selected is 2-3wt%.
Processing aid of the invention uses lubricant, curing agent and plasticizer.
The lubricant that prior art is used can have adverse effect on to the mechanical property of magnet, in order to overcome this to ask
Topic, the present invention is selected and can form the polyvinyl butyral resin of good adhesive as lubricant with resin complex.Using polyethylene
Butyral treatment, can improve the compression strength of magnet, and raise with increasing for polyvinyl butyral resin addition.This is
Because polyvinyl butyral resin and F48 thermosetting phenolic resins coordinate, the good adhesivity of energy forming properties is solid in bonded permanent magnet
Increase the node in binding agent network structure during change, adhesion strength enhancing causes the compression strength of magnet to increase.
The curing agent that the present invention is selected is m-phenylene diamine (MPD), and plasticizer is phthalate compound or epoxies chemical combination
Thing.
Step 5, will knead uniform material and is rolled into the sheet material that thickness is 2-3mm；
Step 6, sheet material is crushed in disintegrating machine, obtains the pellet of the screen cloth by 12 mesh；
Step 7, by extruder by pellet extrusion molding, obtains rare-earth flexible magnetic stripe, wherein, during extrusion molding
Apply the alignment magnetic field of 1.5T.
Present invention also offers a kind of rare-earth flexible magnetic stripe of high tenacity, the magnetic stripe is according to the above-mentioned method system of the present invention
Into specifically, the component of the rare-earth flexible magnetic stripe of the high tenacity includes：NdFeB alloy magnetic powder 92wt%-97wt%, bond
Agent 2-3wt%, processing aid 1-5wt%, wherein, the NdFeB alloy magnetic powders include Dy elements or Tb elements, the binding agent
It is F48 thermosetting phenolic epoxy resin, the processing aid is coupling agent, coating agent, lubricant, curing agent and plasticizer, institute
Coupling agent is stated for titanate esters, the coating agent is aromatic dicarboxylic acid.
Above content is only presently preferred embodiments of the present invention, for one of ordinary skill in the art, according to of the invention
Thought, will change in specific embodiments and applications, and this specification content should not be construed as to the present invention
Limitation.
Claims (2)
1. the production method of the rare-earth flexible magnetic stripe of a kind of high tenacity, it is characterised in that the described method comprises the following steps：
Step 1, to Dy elements or Tb elements is added in NdFeB, forms NdFeB alloys, wherein, the Dy elements or Tb elements exist
Weight percent content in NdFeB alloys is respectively 6% and 4%；
Step 2, prepares the NdFeB alloy powders that average grain diameter is for 3-4 μm；Specifically, being prepared first with Quench belt-rejecting technology
NdFeB alloy sheets, then obtain NdFeB alloy powders through broken, grinding, wherein, by the broken method of hydrogen by NdFeB alloys
Thin slice is crushed；
Step 3, is surface-treated using coupling agent and coating agent to NdFeB alloy powders, and the coupling agent is titanate esters, institute
Coating agent is stated for aromatic dicarboxylic acid, it is to prevent rare-earth flexible magnetic stripe from getting rusty to add the aromatic dicarboxylic acid；Specific bag
Include：Titanate esters toluene solution, the aromatic dicarboxylic acid that concentration is 0.2wt% by NdFeB alloy powders and concentration for 0.1wt%
Mixing, and stir half an hours with 400 revs/min with magnetic stirring apparatus at 100 DEG C；
Step 4, in masticator, the NdFeB alloy powders after surface treatment and binding agent and processing aid is kneaded uniformly, is mixed
Refining temperature is 90-110 DEG C, and mixing time is 10-15 minutes, wherein the binding agent is F48 thermosetting phenolic epoxy resin, its
In, the processing aid is lubricant, curing agent, plasticizer, and the lubricant is polyvinyl butyral resin, and the curing agent is
M-phenylene diamine (MPD), the plasticizer is phthalate compound or epoxy compounds；
Step 5, will knead uniform material and is rolled into the sheet material that thickness is 2-3mm；
Step 6, sheet material is crushed in disintegrating machine, obtains the pellet of the screen cloth by 12 mesh；
Step 7, by extruder by pellet extrusion molding, obtains rare-earth flexible magnetic stripe, wherein, apply during extrusion molding
The alignment magnetic field of 1.5T.
2. the production method of the rare-earth flexible magnetic stripe of high tenacity according to claim 1, it is characterised in that the grinding
Method is airflow milling or ball milling.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510023631.XA CN104599833B (en) | 2015-01-16 | 2015-01-16 | The rare-earth flexible magnetic stripe and its production method of a kind of high tenacity |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510023631.XA CN104599833B (en) | 2015-01-16 | 2015-01-16 | The rare-earth flexible magnetic stripe and its production method of a kind of high tenacity |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN104599833A CN104599833A (en) | 2015-05-06 |
| CN104599833B true CN104599833B (en) | 2017-07-04 |
Family
ID=53125546
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201510023631.XA Active CN104599833B (en) | 2015-01-16 | 2015-01-16 | The rare-earth flexible magnetic stripe and its production method of a kind of high tenacity |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN104599833B (en) |
Families Citing this family (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110021468A (en) * | 2019-05-23 | 2019-07-16 | 温州市享通塑磁科技有限公司 | A kind of flexibility NdFeB material and preparation method thereof |
| CN114538910B (en) * | 2020-11-26 | 2023-03-07 | 和也健康科技有限公司 | Magnetic stripe for intelligent healthy home and preparation method thereof |
Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1288239A (en) * | 1999-09-14 | 2001-03-21 | 北京大学 | Multielement gap type permanent-magnet material and production process of magnetic powler and magnet |
| CN1335796A (en) * | 1999-11-04 | 2002-02-13 | 精工爱普生株式会社 | Cooling roll, production method for magnet material, thin-band-like magnet material, magnet powder and bond magnet |
| CN101152772A (en) * | 2002-12-27 | 2008-04-02 | Tdk株式会社 | Resin composition, cured resin, sheet-like cured resin, laminated body, prepreg, electronic parts and multilayer boards |
| 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 |
| CN102005277A (en) * | 2010-09-30 | 2011-04-06 | 广州金南磁性材料有限公司 | Stress-field-oriented anisotropic flexible bonded neodymium-iron-boron magnet and preparation method thereof |
| CN103843081A (en) * | 2011-09-30 | 2014-06-04 | 日东电工株式会社 | Rare earth permanent magnet and method for producing rare earth permanent magnet |
-
2015
- 2015-01-16 CN CN201510023631.XA patent/CN104599833B/en active Active
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1288239A (en) * | 1999-09-14 | 2001-03-21 | 北京大学 | Multielement gap type permanent-magnet material and production process of magnetic powler and magnet |
| CN1335796A (en) * | 1999-11-04 | 2002-02-13 | 精工爱普生株式会社 | Cooling roll, production method for magnet material, thin-band-like magnet material, magnet powder and bond magnet |
| CN101152772A (en) * | 2002-12-27 | 2008-04-02 | Tdk株式会社 | Resin composition, cured resin, sheet-like cured resin, laminated body, prepreg, electronic parts and multilayer boards |
| 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 |
| CN102005277A (en) * | 2010-09-30 | 2011-04-06 | 广州金南磁性材料有限公司 | Stress-field-oriented anisotropic flexible bonded neodymium-iron-boron magnet and preparation method thereof |
| CN103843081A (en) * | 2011-09-30 | 2014-06-04 | 日东电工株式会社 | Rare earth permanent magnet and method for producing rare earth permanent magnet |
Also Published As
| Publication number | Publication date |
|---|---|
| CN104599833A (en) | 2015-05-06 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN103824668B (en) | Low-weight rare earth high-coercivity sintered neodymium-iron-boron magnet and production method thereof | |
| CN102456458B (en) | High-corrosion-resistance sintered neodymium iron boron magnet and preparation method thereof | |
| JP6960201B2 (en) | Method for manufacturing Nd-Fe-B-based sintered permanent magnetic material | |
| EP4016556B1 (en) | Neodymium-iron-boron magnetic material, preparation method therefor and application thereof | |
| CN109585113A (en) | A kind of preparation method of Sintered NdFeB magnet | |
| CN100394518C (en) | Method for preparing high coercive force sintering rare-earth-iron-p permanent magnetic material | |
| CN105849828B (en) | The method for manufacturing rare-earth magnet | |
| WO2014101247A1 (en) | Method for preparing sintered neodymium-iron-boron magnet | |
| CN1934283A (en) | R-Fe-B-based rare earth permanent magnet material | |
| CN101364465A (en) | Permanent magnetic RE material and preparation thereof | |
| CN111210963A (en) | High-performance yttrium cerium based rare earth permanent magnet and preparation method thereof | |
| CN107742564A (en) | A kind of method that auxiliary alloy addition of high dysprosium prepares low-cost neodymium iron boron magnet | |
| WO2019029000A1 (en) | Heat-resistant neodymium iron boron magnet and preparation method therefor | |
| JP2013149862A (en) | Method of manufacturing rare earth magnet | |
| CN107958760A (en) | A kind of rare earth permanent-magnetic material and preparation method thereof | |
| CN105427994A (en) | Corrosion-resistant lanthanum-cerium-rich sintered neodymium iron boron magnet and preparation method | |
| CN104599833B (en) | The rare-earth flexible magnetic stripe and its production method of a kind of high tenacity | |
| CN101154489B (en) | Anti-impact ferrous rare earth permanent magnet and its manufacturing method | |
| CN106601401A (en) | Preparation method of high-abundance rare earth sintered neodymium-iron-boron magnet capable of regulating and controlling grain boundary multi-layer structure and product prepared by preparation method | |
| CN109509628B (en) | Preparation method of sintered neodymium iron boron composite powder | |
| CN109585109A (en) | A kind of mischmetal permanent magnet and preparation method thereof | |
| CN107026002B (en) | The preparation method of Nd Fe B alloys magnet | |
| CN102248157A (en) | Method for improving coercive force and maximum service temperature of anisotropic rare earth permanent magnetic powder | |
| CN112309662B (en) | Lanthanum cerium-containing neodymium-iron-boron magnet and preparation method thereof | |
| CN116313353B (en) | Neodymium-iron-boron magnet and preparation method thereof |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| GR01 | Patent grant | ||
| GR01 | Patent grant | ||
| CP03 | Change of name, title or address | ||
| CP03 | Change of name, title or address |
Address after: 313300 Bamboo Industry Science and Technology Venture Center, Xiaofeng Town, Anji County, Huzhou City, Zhejiang Province, 6, 7, 8, 9 and 10 Patentee after: Heye Health Technology Co., Ltd. Address before: 313300 health medical industry park, Anji Economic Development Zone, Huzhou, Zhejiang Patentee before: Zhejiang Heye Health Technology Co., Ltd. |