CN104584147A - Magnetic material, use thereof and method for the production thereof - Google Patents
Magnetic material, use thereof and method for the production thereof Download PDFInfo
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- CN104584147A CN104584147A CN201380036990.8A CN201380036990A CN104584147A CN 104584147 A CN104584147 A CN 104584147A CN 201380036990 A CN201380036990 A CN 201380036990A CN 104584147 A CN104584147 A CN 104584147A
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- magnetic material
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- copper
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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
- H01F1/0579—Alloys characterised by their composition containing rare earth metals and magnetic transition metals, e.g. SmCo5 and IIIa elements, e.g. Nd2Fe14B with exchange spin coupling between hard and soft nanophases, e.g. nanocomposite spring magnets
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- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22C—ALLOYS
- C22C28/00—Alloys based on a metal not provided for in groups C22C5/00 - C22C27/00
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B22—CASTING; POWDER METALLURGY
- B22F—WORKING METALLIC POWDER; MANUFACTURE OF ARTICLES FROM METALLIC POWDER; MAKING METALLIC POWDER; APPARATUS OR DEVICES SPECIALLY ADAPTED FOR METALLIC POWDER
- B22F9/00—Making metallic powder or suspensions thereof
- B22F9/02—Making metallic powder or suspensions thereof using physical processes
- B22F9/04—Making metallic powder or suspensions thereof using physical processes starting from solid material, e.g. by crushing, grinding or milling
- B22F2009/041—Making metallic powder or suspensions thereof using physical processes starting from solid material, e.g. by crushing, grinding or milling by mechanical alloying, e.g. blending, milling
-
- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22C—ALLOYS
- C22C2202/00—Physical properties
- C22C2202/02—Magnetic
Abstract
The present invention relates to a magnetic material which comprises a hard magnet phase (1), at least one soft magnet phase (2) and a grain boundary phase (3), wherein at least one hard magnet phase (1) contains at least one transition metal, at least one rare earth metal and boron, wherein the magnetic material (10) contains copper and wherein the copper is arranged substantially in the grain boundary phase (3).
Description
Technical field
The present invention relates to a kind of magnetic material, the application of this magnetic material and the method for the manufacture of this magnetic material.
Background technology
Due to the use of the increase of nearest motor especially in automobile engineering and also in the other field only having very limited structure space, thus the demand of high magnetic material is increased in recent years greatly.High remanent magnetism is to the feature of this particularly suitable magnetic material, is the large coercive field measured of the demagnetization intensity of magnetic material and large energy product.But not only the final physical characteristic of magnetic material, chemical characteristic and particularly magnetic properties and also its to manufacture cost be important.In principle in magnetic material at the magnet of sintered magnet and rapid quenching and wherein particularly distinguish between exchange coupling magnet.Sintered magnet is so in brief by magnet that corresponding raw-material melting and sintering subsequently manufacture at this.By the sintering process of powder metallurgy, form micro-structural by the crystal of the personalization from magnetic material or crystal grain, these micro-structurals are separated by the Grain-Boundary Phase being rich in rare earth metal and mostly therefore by magnetic decoupling.If the raw material as magnetic material use transition metal and the boron (B) in addition of rare earth metal, the such as iron (Fe) of such as neodymium (Nd), so form Nd by melting and these elements of sintering with corresponding ratio
2fe
14b crystal, these crystal by mostly paramagnetic, be rich in rare earth metal, be namely rich in the crystal boundary of Nd separately.This Grain-Boundary Phase causes crystal grain, crystal or crystallite decoupling and therefore causes large coercive field, namely high coercive field strength.When the shortcoming of this sintered magnet is its manufacturing expenses, relatively costly, also owing to gathering its required high concentration by rare earth metal in Grain-Boundary Phase.In addition shortcoming is, remanent magnetism is limited in maximum about 1.3 teslas by the micro-structural determined by manufacture method be made up of the crystal be separated by Grain-Boundary Phase, crystallite or crystal grain.Exchange coupling magnetic material is understood to following magnetic material, these magnetic materials except the Hard Magnetic phase that exists in such as sintered magnet or hard magnetic mutually except also have soft magnetism phase or soft magnetism phase and such as can be manufactured by so-called " melt spinning (melt revolve point) " method or HDDR method (" Hydrogenation Disproportionation DesorptionRecombination (hydrogenation disproportionation desorb restructuring) ").The advantage of these exchange coupling magnetic materials is, the good coupling of its high saturation and crystal grain, and this shows High Energy Product and relative high remanent magnetism.But due to the Hard Magnetic except also existing in sintered magnet mutually except also there is soft magnetism phase, and owing to lacking Grain-Boundary Phase, Hard Magnetic phase and soft magnetism only poorly decoupling mutually, this show obviously reduce relative to traditional sintered magnet coercive field strength, namely to demagnetize intensity.
Summary of the invention
Magnetic material according to the present invention be a kind of exchange coupling magnetic material and be characterised in that excellent magnetic characteristic and therefore high remanent magnetism, large energy sum particularly feature be also the coercive field strength high relative to traditional exchange coupling magnet.High coercive field strength, namely high demagnetization intensity are even obtained under the high application of temperature such as occurred in the motor at this, the application that this structure space making magnetic material according to the present invention be particularly suitable for having high power density reduces.
According to the present invention, magnetic material comprises at least one Hard Magnetic phase, at least one soft magnetism phase and Grain-Boundary Phase, and wherein at least one Hard Magnetic comprises at least one transition metal, at least one rare earth metal and boron mutually.In addition, this magnetic material comprises copper, and this copper is only arranged in Grain-Boundary Phase substantially.If the crystal grain of Hard Magnetic phase or crystal or crystallite are formed by just in time a kind of defined compound of the mixture of element or element, there is a Hard Magnetic phase so in the sense of the present invention.If the compound in crystal grain, crystal or crystallite or the volume share of element change, or also crystal grain, crystal or crystallite can comprise different compounds or element, so there is multiple Hard Magnetic phase.Identical content is applicable to soft magnetism phase.Grain-Boundary Phase is in the sense of the present invention understood to following phase, and this phase is by being formed at the crystal grain of soft magnetism phase and Hard Magnetic phase, crystal or the grain boundaries element of crystallite and/or the gathering of mixture of compound and/or element and compound.This Grain-Boundary Phase comprises copper according to the present invention, but in addition also can comprise other elements and/or compound, such as vanadium (V), tungsten (W), aluminium (Al) and other elements.
Surprisingly, have at least one Hard Magnetic phase defined and at least one soft magnetism phase according in exchange coupling magnetic material of the present invention, cause significantly improving of coercive field strength by the existence of copper.Importantly, copper forms Grain-Boundary Phase in the edge of each crystal grain of Hard Magnetic phase and soft magnetism phase or is present in this Grain-Boundary Phase in the present invention.Copper is present in the Grain-Boundary Phase of the grain boundaries of Hard Magnetic soft magnetic phase as well as phase therefore substantially, namely except technical inevitably share.Suppose when not binding isotherm, copper has the ability of wetting magnetic crystal grain well, therefore accumulate in crystal boundary get along and produce the impact of strong decoupling to magnetic crystal grain thus, thus relative to traditional exchange coupling magnetic material, significantly improve the coercive field reduced owing to there is soft magnetism phase.Therefore the copper accumulating in grain boundaries offset the effect of the reduction coercive field of the soft magnetism phase according to exchange coupling magnetic material of the present invention at least substantially.In addition, due to the soft magnetism phase of high share, very high according to the remanent magnetism of magnetic material of the present invention.Therefore be High Energy Product according to the feature of magnetic material of the present invention and be therefore characterised in that excellent remanent magnetism and also have very large coercive field, opening up diversified application possibility thus.Due to composition and the micro-structural of exchange coupling magnetic material according to the present invention, this magnetic material is lower than traditional sintered magnet explicit costs being rich in rare earth metal, and this also promotes its application in low cost products and therefore causes high market acceptance.By the manufacture be associated with the magnetic micro-structure be made up of mutually Hard Magnetic phase and soft magnetism in addition of exchange coupling magnetic material, according to magnetic material of the present invention in addition can when without the need to when large technology and logistics cost at low cost and manufacture with extraordinary quality.
Dependent claims illustrates preferred improvement project of the present invention.
According to a kind of favourable execution mode of the present invention, respectively relative to the gross mass of magnetic material, be 70-90 quality % according to the share of the transition metal in exchange coupling magnetic material of the present invention, particularly the share of 75-88 quality % and/or rare earth metal is 5-30 quality %, particularly the share of 7-20 quality % and/or boron (B) is 0.5-1.5 quality %, the share of particularly 1-1.4 quality %, and/or copper is 0.1-5 quality % and particularly 0.5-3 quality %.If the share of transition metal is at least 70 quality % and the share that preferably share of at least 75 quality % and/or rare earth metal is at least 5 quality % or preferably at least 7 quality % and/or boron is at least 0.5 quality % and preferably at least 1 quality %, and/or the share of copper is at least 0.1 quality % and preferably at least 0.5 quality %, so obtain a kind of magnetic material efficiently, this magnetic material has low-down rare earth metal content and however has outstanding magnetic characteristic and particularly high remanent magnetism and high coercive field strength, and therefore in its cost of raw material and therefore also in view of its manufacturing cost is preferred.Particularly the levels of transition metals of at least 70 quality % and preferably at least 75 quality % contributes to improving according to the magnetic remanence of magnetic material of the present invention at this.But from more than 88 quality % and particularly more than 90 quality % levels of transition metals, there is the share high like this of at least one soft magnetism phase, make coercive field become very little.In addition occur undesirable phase, such as when iron is not only as transition metal but also as soft magnetism phase, excessive α-Fe, this has a negative impact to the magnetic characteristic of magnetic material in addition.This point is also applicable to more than 20 quality % with particularly more than the rare earth metal content of 30 quality %, more than 1.4 quality % with particularly more than the Boron contents of 1.5 quality %, and to be also applicable to more than 3 quality % and the copper share more than 5 quality %.If rare earth metal content is at least 5 quality % and preferably at least 7 quality %, the crystal grain so produced very well decoupling, this contributes to improving coercive field.The share of rare earth metal is higher, and particularly from more than 20 quality % and particularly more than 30% quality % containing measuring, more likely form undesirable impurity phase, such as SE
2tM
17with η phase, the magnetic characteristic of these impurity phases to magnetic material has a negative impact.SE represents rare earth metal in this case and TM represents transition metal.
The execution mode that another kind according to the present invention is favourable, transition metal is chosen from following group, and this group comprises: iron (Fe), cobalt (Co), manganese (Mn) and their mixture and preferably Fe.Here mentioned transition metal and rare earth metal and boron form cell structure stable especially and contribute to strengthening knowing and forms desired favourable magnetic characteristic brightly, namely particularly contribute to according to the saturated of magnetic material of the present invention and magnetic anisotropy.In addition, when the relatively low cost of raw material, its availability is commercially high, and this obviously reduces the manufacturing cost according to magnetic material of the present invention.The advantageous applications of Fe in illustrated metal be attributable to its in healthy and ecological in without a doubt and be also attributable to it in addition and as compared to Co with Mn the cost of raw material again obviously reduced.In addition according to the present invention, rare earth metal is preferably chosen from following group, and this group comprises: neodymium (Nd), praseodymium (Pr), dysprosium (Dy), terbium (Tb), lanthanum (La), cerium (Ce) and their mixture and preferably Ce and/or La.Cited rare earth metal Nd, Pr, Dy, Tb, La and Ce have been proved to be as other components important with the present invention, namely at least one transition metal, boron and copper are compatible particularly well, and promote the formation with the continual and steady lattice structure of high anisotropy in its side, improve the magnetic characteristic according to magnetic material of the present invention thus.Although its cost of raw material is partly higher, lower due to its content in magnetic components according to the present invention relative to the reduction of traditional magnetic material in summation according to the manufacturing cost of magnetic material of the present invention.Because the application of extra high availability and the relative low cost of raw material, particularly element La and Ce is particularly advantageous for magnetic material according to the present invention.
The execution mode favourable according to another kind, the at least one compound of the other element of at least one or one or more elements is preferably comprised according to magnetic material of the present invention, described element is chosen from following group, and this group comprises: vanadium (V), tungsten (W), aluminium (Al), molybdenum (Mo), gallium (Ga), titanium (Ti), zinc (Zn), niobium (Nb) and zirconium (Zr).But these elements or their compound can to magnetic characteristic and wherein particularly coercive field strength also with good grounds magnetic material of the present invention physics and chemistry characteristic and therefore its resistance, namely its chemistry or electrochemistry resistance, such as its corrosion resistance produce positive influences.
In addition, preferably, relative to the gross mass of magnetic material, be 0.1-5 quality % and particularly 0.5-3 quality % from the share of at least one compound comprising the other element of at least one chosen the group of vanadium (V), tungsten (W), aluminium (Al), molybdenum (Mo), gallium (Ga), titanium (Ti), zinc (Zn), niobium (Nb) and zirconium (Zr) or one or more elements.The limiting value here illustrated and particularly within preferred limiting value, the at least one compound of one or more elements in the element that at least one is other or these elements can contribute to improving the coercive field strength according to magnetic material of the present invention particularly well, and does not apply adverse effect to lattice structure.
According to the particularly preferred execution mode of one, the feature according to magnetic material of the present invention is, at least one Hard Magnetic is by Nd
2fe
14b, CeFeB or LaFeB are formed.If at least one hard magnetic is Nd mutually
2fe
14b, CeFeB or LaFeB phase, so material according to the invention power is strong especially, namely has very high energy density, very large coercive field also also has extra high remanent magnetism.
Another preferred embodiment regulation of the present invention, the size of at least one Hard Magnetic phase and/or the size of at least one soft magnetism phase are less than 0.1 μm.If the size of the size of at least one Hard Magnetic phase and/or at least one soft magnetism phase and be preferably less than 0.1 μm according to all Hard Magnetic phases of magnetic material of the present invention and/or the size of soft magnetism phase, it is best for so mixing the Grain-Boundary Phase being rich in copper, makes each phase or crystal grain decoupling especially by force.This significantly improves the coercive field strength of magnetic material.In addition, therefore particularly its oxidation protection can be contributed in the magnetic material containing cerium and lanthanum according to the copper comprised in magnetic material of the present invention.Concept " size " is in the sense of the present invention understood to the average crystal grain diameter of each crystal grain of phase at this.
According to another preferred embodiment of the present invention, the feature of magnetic material is, at least one soft magnetism comprises at least one at least one transition metal and the element particularly chosen from following group mutually, and this group comprises: Fe, Co and Mn.Particularly advantageously, soft magnetism is formed, because this makes the Stability Analysis of Structures of magnetic material and strengthens magnetic characteristic by with this Hard Magnetic phase/these Hard Magnetics transition metal that the interior transition metal existed is identical mutually.If these elements or their mixture be comprised at least one soft magnetism mutually in and preferably all soft magnetisms mutually in, so cause the extraordinary decoupling of crystal grain, this remanent magnetism to magnetic material according to the present invention produce positive influences.
According to the present invention, a kind of permanent magnet comprising magnetic material as above is described in addition.Material according to the invention is again exchange coupling, therefore comprises at least one Hard Magnetic phase, at least one soft magnetism phase and in addition substantially at the copper of the grain boundaries of Hard Magnetic soft magnetic phase as well as phase, namely Grain-Boundary Phase form.Permanent magnet according to the present invention can have other magnetic or non-magnetic phase except magnetic material according to the present invention, but also can only be made up of magnetic material according to the present invention.For favourable effect, advantage and the execution mode described by magnetic material according to the present invention also for permanent magnet according to the present invention.
Method for the manufacture of magnetic material according to the present invention is unrestricted in detail, prerequisite obtains a kind of exchange coupling magnetic material, its except at least one Hard Magnetic mutually except also there is at least one soft magnetism phase and Grain-Boundary Phase, wherein at least one Hard Magnetic comprises at least one transition metal, at least one rare earth metal and boron mutually, wherein magnetic material comprise copper and wherein copper be substantially arranged in Grain-Boundary Phase.Possible method for the manufacture of magnetic material according to the present invention comprises " spark-plasma-sintering (spark plasma sintering) ", " capacitor dischargesintering (capacitor discharge sintering) ", rapid quenching and the strengthening by " severe plastic deformation (severe plastic deformation) ".The suitable heat treatment magnetic characteristic of obtained material being produced further to positive influences can be carried out subsequently.
According to the present invention, a kind of particularly preferred method for the manufacture of magnetic material is described, wherein the method is characterized in that the high energy milling step of at least one Hard Magnetic phase, at least one soft magnetism phase and copper, this Hard Magnetic comprises at least one transition metal, at least one rare earth metal and boron mutually.High energy milling preferably can carry out by high energy grinding mill, as planetary ball mill at this.The high magnetic material with excellent remanent magnetism and coercive field strength and large energy product is provided in simple and that cost is low mode by method according to the present invention.For favourable characteristic, effect and the execution mode described by magnetic material according to the present invention also for the method for the manufacture of this magnetic material according to the present invention.
In addition, according to the present invention, the application of magnetic material as above preferably in wind power plant, PKW, NKW, starter, motor, loud speaker and MEMS (micro electro mechanical system) is also described.Due to outstanding magnetic characteristic, namely its high power density of magnetic material according to the present invention and the combination of particularly high remanent magnetism and large coercive field, be particularly advantageous according to the application in the lucky device mentioned here of magnetic material of the present invention.
In addition, according to the present invention, a kind of motor, particularly generator, automobile, starter, motor, loud speaker or MEMS (micro electro mechanical system) are described, this motor comprise according to magnetic material of the present invention, comprise this magnetic material permanent magnet or according to above-mentioned magnetic material made according to the method for the present invention.For magnetic material according to the present invention and the advantage described by method of the present invention, favourable effect and preferred embodiment also for motor according to the present invention.
Accompanying drawing explanation
Embodiments of the present invention is described in detail with reference to the accompanying drawings.In the accompanying drawings:
Fig. 1 is the schematic diagram of the micro-structural of a kind of preferred implementation according to magnetic material of the present invention.
Embodiment
Fig. 1 illustrates the schematic diagram of the micro-structural of a kind of preferred implementation according to magnetic material 10 of the present invention.Magnetic material 10 according to the present invention comprises by Nd
2fe
14the hard magnetic phase 1 that B is formed, the soft magnetism phase 2 be made up of α-Fe and the Grain-Boundary Phase 3 substantially formed by copper.At this, respectively relative to the gross mass of magnetic material 10, the share of soft magnetism phase 2 is 20 quality % and the share of copper is 2 quality %.This magnetic material 10 is manufactured as follows:
For the Nd manufactured by standard melt-spin method
2fe
14b powder add respectively for the gross mass of magnetic material 10 α-the Fe of 20 quality % and the copper of 2 quality % and by planetary ball mill under protective gas (argon) at about 60 DEG C when 150 turns per minute by mixture wet lapping 10 hours.N-heptane and oleic acid is used as grinding aid.Utilize n-heptane to wash in the powder of acquisition, carry out suppressing under the pressure of 200MPa in the magnetic field of about 1 tesla and then stand Fast Sintering method (spark-plasma sintering (spark plasma sintering)).Parameter during Fast Sintering method is as follows: pressure: approximately 30MPa, temperature: about 800 DEG C, sintering time: about 5 minutes.Determine by EDX and high-resolution TEM according to the structure of of the present invention obtained material and composition.The size (average diameter of crystal grain) of soft magnetism phase is approximately 0.06-0.08 μm, and the size (average diameter of crystal grain) of Hard Magnetic phase is approximately 0.05-0.07 μm.Can prove not only Hard Magnetic mutually in and also soft magnetism mutually in all there is no copper.The remanent magnetism of the material obtained is 1.6 teslas, and its coercive field strength is 1300kA/m.
Claims (13)
1. magnetic material, comprise at least one Hard Magnetic phase (1), at least one soft magnetism phase (2) and Grain-Boundary Phase (3), wherein at least one Hard Magnetic phase (1) comprises at least one transition metal, at least one rare earth metal and boron, wherein said magnetic material comprise copper and wherein copper be substantially arranged in described Grain-Boundary Phase (3).
2. according to magnetic material according to claim 1, it is characterized in that, respectively relative to the gross mass of described magnetic material, the share of transition metal is 70-90 quality %, particularly the share of 75-88 quality % and/or rare earth metal is 5-30 quality %, particularly the share of 7-20 quality % and/or boron is 0.5-1.5 quality %, and the share of particularly 1-1.4 quality %, and/or copper is 0.1-5 quality % and particularly 0.5-3 quality %.
3. according to the magnetic material described in claim 1 or 2, it is characterized in that, transition metal is chosen from following group, this group comprises: Fe, Co, Mn and their mixture and preferably Fe and/or rare earth metal are chosen from following group, and this group comprises: Nd, La, Ce, Dy, Tb, Pr and their mixture and preferably Ce and/or La.
4. according to the magnetic material one of aforementioned claim Suo Shu, it is characterized in that, described magnetic material comprises at least one compound of the other element of at least one or one or more elements, described element is chosen from following group, and this group comprises: V, W, Al, Mo, Ga, Ti, Zn, Nb and Zr.
5. according to magnetic material according to claim 4, it is characterized in that, relative to the gross mass of described magnetic material, the share of at least one compound of the element that at least one chosen from the group comprising V, W, Al, Mo, Ga, Ti, Zn, Nb and Zr is other or one or more elements is 0.1-5 quality %, particularly 0.5-3 quality %.
6. according to the magnetic material one of aforementioned claim Suo Shu, it is characterized in that, at least one Hard Magnetic phase (1) is by Nd
2fe
14b, CeFeB or LaFeB are formed.
7. according to the magnetic material one of aforementioned claim Suo Shu, it is characterized in that, the size of at least one Hard Magnetic phase (1) and/or the size of at least one soft magnetism phase (2) are less than 0.1 μm, and the thickness of particularly Grain-Boundary Phase (3) is on average less than 0.03 μm, is preferably less than 0.01 μm.
8. according to the magnetic material one of aforementioned claim Suo Shu, it is characterized in that, copper be arranged between Hard Magnetic phase (1) and/or soft magnetism mutually between and/or in Grain-Boundary Phase between (2) Hard Magnetic phase (1) with soft magnetism phase (2), and particularly soft magnetism phase (2) and/Hard Magnetic phase (1) approximate without copper ground formation.
9. according to the magnetic material one of aforementioned claim Suo Shu, it is characterized in that, at least one soft magnetism comprises at least one in the element chosen from following group mutually, and this group comprises: Fe, Co and Mn.
10. permanent magnet, comprises at least one according to the magnetic material (10) one of claim 1-9 Suo Shu.
11. for the manufacture of the method for magnetic material (10), it is characterized in that the high energy milling step of at least one Hard Magnetic phase (1), at least one soft magnetism phase (2) and copper, wherein at least one Hard Magnetic comprises at least one transition metal, at least one rare earth metal and boron mutually.
12. according to the magnetic material one of claim 1-9 Suo Shu or at least one is according to the application of permanent magnet according to claim 10 in wind power plant, PKW, NKW, starter, motor, loud speaker and MEMS (micro electro mechanical system).
13. motors, particularly generator, automobile, starter, motor, loud speaker or MEMS (micro electro mechanical system), comprise according to the magnetic material one of claim 1-9 Suo Shu or comprise at least one according to permanent magnet according to claim 10.
Applications Claiming Priority (3)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| DE102012211960.4 | 2012-07-10 | ||
| DE102012211960.4A DE102012211960A1 (en) | 2012-07-10 | 2012-07-10 | Magnetic material, its use and process for its preparation |
| PCT/EP2013/061336 WO2014009057A1 (en) | 2012-07-10 | 2013-06-03 | Magnetic material, use thereof and method for the production thereof |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN104584147A true CN104584147A (en) | 2015-04-29 |
| CN104584147B CN104584147B (en) | 2017-10-13 |
Family
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201380036990.8A Active CN104584147B (en) | 2012-07-10 | 2013-06-03 | Magnetic material, its application and its manufacture method |
Country Status (3)
| Country | Link |
|---|---|
| CN (1) | CN104584147B (en) |
| DE (1) | DE102012211960A1 (en) |
| WO (1) | WO2014009057A1 (en) |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106370719A (en) * | 2016-08-18 | 2017-02-01 | 苏州热工研究院有限公司 | Magnetic nondestructive test method of ferromagnetic metal material strain hardening index |
| CN106847455A (en) * | 2016-12-21 | 2017-06-13 | 包头稀土研究院 | Neodymium iron boron preparation of sections method |
| CN106847456A (en) * | 2016-12-21 | 2017-06-13 | 包头稀土研究院 | The preparation method of NdFeB magnetic powder |
| CN109972027A (en) * | 2018-12-24 | 2019-07-05 | 南昌航空大学 | A method of mutually adding preparation anisotropy CeFeB permanent-magnet alloy by low melting point PrCu intergranular |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107146674B (en) * | 2017-05-27 | 2018-11-09 | 浙江大学 | From the cerium-rich rare earth permanent magnet and its production method of heat treatment |
| EP4340180A1 (en) | 2022-09-16 | 2024-03-20 | Siemens Aktiengesellschaft | Permanently excited dynamo-electric machine, method for simulation, computer system, computer program product |
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- 2012-07-10 DE DE102012211960.4A patent/DE102012211960A1/en not_active Withdrawn
-
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- 2013-06-03 WO PCT/EP2013/061336 patent/WO2014009057A1/en active Application Filing
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| CN109972027A (en) * | 2018-12-24 | 2019-07-05 | 南昌航空大学 | A method of mutually adding preparation anisotropy CeFeB permanent-magnet alloy by low melting point PrCu intergranular |
Also Published As
| Publication number | Publication date |
|---|---|
| WO2014009057A1 (en) | 2014-01-16 |
| CN104584147B (en) | 2017-10-13 |
| DE102012211960A1 (en) | 2014-01-16 |
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