CN106205923A - A kind of binding Nd-Fe-B permanent magnetic material and Preparation equipment thereof - Google Patents
A kind of binding Nd-Fe-B permanent magnetic material and Preparation equipment thereof Download PDFInfo
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- CN106205923A CN106205923A CN201610527999.4A CN201610527999A CN106205923A CN 106205923 A CN106205923 A CN 106205923A CN 201610527999 A CN201610527999 A CN 201610527999A CN 106205923 A CN106205923 A CN 106205923A
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- neodymium
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- 229910001172 neodymium magnet Inorganic materials 0.000 title claims abstract description 52
- 239000000696 magnetic material Substances 0.000 title claims abstract description 21
- 238000002360 preparation method Methods 0.000 title claims description 21
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical group [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 claims abstract description 36
- 229910052779 Neodymium Inorganic materials 0.000 claims abstract description 30
- QEFYFXOXNSNQGX-UHFFFAOYSA-N neodymium atom Chemical group [Nd] QEFYFXOXNSNQGX-UHFFFAOYSA-N 0.000 claims abstract description 25
- 230000005389 magnetism Effects 0.000 claims abstract description 24
- 229910052796 boron Inorganic materials 0.000 claims abstract description 21
- 229910052761 rare earth metal Inorganic materials 0.000 claims abstract description 20
- 229910052758 niobium Inorganic materials 0.000 claims abstract description 17
- 239000006247 magnetic powder Substances 0.000 claims abstract description 15
- ZOXJGFHDIHLPTG-UHFFFAOYSA-N Boron Chemical group [B] ZOXJGFHDIHLPTG-UHFFFAOYSA-N 0.000 claims abstract description 14
- 150000003624 transition metals Chemical class 0.000 claims abstract description 11
- 229910052719 titanium Inorganic materials 0.000 claims abstract description 7
- 229910052726 zirconium Inorganic materials 0.000 claims abstract description 7
- 229910052804 chromium Inorganic materials 0.000 claims abstract description 5
- 229910052750 molybdenum Inorganic materials 0.000 claims abstract description 5
- 230000005291 magnetic effect Effects 0.000 claims description 41
- 239000010955 niobium Substances 0.000 claims description 34
- 238000010791 quenching Methods 0.000 claims description 27
- 230000000171 quenching effect Effects 0.000 claims description 27
- 239000000956 alloy Substances 0.000 claims description 26
- 229910045601 alloy Inorganic materials 0.000 claims description 25
- 238000002425 crystallisation Methods 0.000 claims description 23
- 230000008025 crystallization Effects 0.000 claims description 23
- QJVKUMXDEUEQLH-UHFFFAOYSA-N [B].[Fe].[Nd] Chemical compound [B].[Fe].[Nd] QJVKUMXDEUEQLH-UHFFFAOYSA-N 0.000 claims description 21
- 229910017052 cobalt Inorganic materials 0.000 claims description 18
- 239000010941 cobalt Substances 0.000 claims description 18
- GUTLYIVDDKVIGB-UHFFFAOYSA-N cobalt atom Chemical compound [Co] GUTLYIVDDKVIGB-UHFFFAOYSA-N 0.000 claims description 18
- 239000006249 magnetic particle Substances 0.000 claims description 16
- 150000002910 rare earth metals Chemical class 0.000 claims description 15
- 239000000463 material Substances 0.000 claims description 14
- 230000008018 melting Effects 0.000 claims description 14
- 238000002844 melting Methods 0.000 claims description 14
- 238000000034 method Methods 0.000 claims description 12
- 239000013078 crystal Substances 0.000 claims description 11
- 229910052751 metal Inorganic materials 0.000 claims description 10
- GFUGMBIZUXZOAF-UHFFFAOYSA-N niobium zirconium Chemical compound [Zr].[Nb] GFUGMBIZUXZOAF-UHFFFAOYSA-N 0.000 claims description 10
- 229910000859 α-Fe Inorganic materials 0.000 claims description 10
- 238000000137 annealing Methods 0.000 claims description 9
- 239000002184 metal Substances 0.000 claims description 9
- 230000008569 process Effects 0.000 claims description 9
- 230000004907 flux Effects 0.000 claims description 8
- 238000003723 Smelting Methods 0.000 claims description 7
- 229910000592 Ferroniobium Inorganic materials 0.000 claims description 6
- ZFGFKQDDQUAJQP-UHFFFAOYSA-N iron niobium Chemical compound [Fe].[Fe].[Nb] ZFGFKQDDQUAJQP-UHFFFAOYSA-N 0.000 claims description 6
- 229910001004 magnetic alloy Inorganic materials 0.000 claims description 6
- 238000007712 rapid solidification Methods 0.000 claims description 5
- 230000005294 ferromagnetic effect Effects 0.000 claims description 4
- 230000002427 irreversible effect Effects 0.000 claims description 4
- FFBHFFJDDLITSX-UHFFFAOYSA-N benzyl N-[2-hydroxy-4-(3-oxomorpholin-4-yl)phenyl]carbamate Chemical compound OC1=C(NC(=O)OCC2=CC=CC=C2)C=CC(=C1)N1CCOCC1=O FFBHFFJDDLITSX-UHFFFAOYSA-N 0.000 claims description 2
- PCHJSUWPFVWCPO-UHFFFAOYSA-N gold Chemical compound [Au] PCHJSUWPFVWCPO-UHFFFAOYSA-N 0.000 claims description 2
- 229910052737 gold Inorganic materials 0.000 claims description 2
- 239000010931 gold Substances 0.000 claims description 2
- 229910052723 transition metal Inorganic materials 0.000 abstract description 9
- -1 neodymium-iron-boron rare earth Chemical class 0.000 abstract description 6
- 239000000203 mixture Substances 0.000 description 20
- XKRFYHLGVUSROY-UHFFFAOYSA-N Argon Chemical compound [Ar] XKRFYHLGVUSROY-UHFFFAOYSA-N 0.000 description 8
- 239000000446 fuel Substances 0.000 description 8
- 238000010168 coupling process Methods 0.000 description 6
- 238000005859 coupling reaction Methods 0.000 description 6
- 230000003993 interaction Effects 0.000 description 6
- 229910000521 B alloy Inorganic materials 0.000 description 5
- 239000000843 powder Substances 0.000 description 5
- 241000282887 Suidae Species 0.000 description 4
- 229910052786 argon Inorganic materials 0.000 description 4
- 150000001875 compounds Chemical class 0.000 description 4
- 229910052756 noble gas Inorganic materials 0.000 description 4
- 230000006911 nucleation Effects 0.000 description 4
- 238000010899 nucleation Methods 0.000 description 4
- 238000012360 testing method Methods 0.000 description 4
- 238000009472 formulation Methods 0.000 description 3
- 239000007789 gas Substances 0.000 description 3
- 229910052742 iron Inorganic materials 0.000 description 3
- 230000009467 reduction Effects 0.000 description 3
- 238000005054 agglomeration Methods 0.000 description 2
- 230000002776 aggregation Effects 0.000 description 2
- 238000005275 alloying Methods 0.000 description 2
- 230000000052 comparative effect Effects 0.000 description 2
- 239000006185 dispersion Substances 0.000 description 2
- 238000005516 engineering process Methods 0.000 description 2
- GUCVJGMIXFAOAE-UHFFFAOYSA-N niobium atom Chemical compound [Nb] GUCVJGMIXFAOAE-UHFFFAOYSA-N 0.000 description 2
- 230000008520 organization Effects 0.000 description 2
- 239000002994 raw material Substances 0.000 description 2
- 238000005245 sintering Methods 0.000 description 2
- 239000000126 substance Substances 0.000 description 2
- 230000001629 suppression Effects 0.000 description 2
- 229910052684 Cerium Inorganic materials 0.000 description 1
- 229910052692 Dysprosium Inorganic materials 0.000 description 1
- 229910052691 Erbium Inorganic materials 0.000 description 1
- 229910052693 Europium Inorganic materials 0.000 description 1
- 229910052688 Gadolinium Inorganic materials 0.000 description 1
- 229910052689 Holmium Inorganic materials 0.000 description 1
- 229910052777 Praseodymium Inorganic materials 0.000 description 1
- 229910052772 Samarium Inorganic materials 0.000 description 1
- 229910052771 Terbium Inorganic materials 0.000 description 1
- 229910052775 Thulium Inorganic materials 0.000 description 1
- 229910052769 Ytterbium Inorganic materials 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 230000006698 induction Effects 0.000 description 1
- 238000009413 insulation Methods 0.000 description 1
- 229910052746 lanthanum Inorganic materials 0.000 description 1
- 230000005415 magnetization Effects 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 239000000155 melt Substances 0.000 description 1
- 238000007670 refining Methods 0.000 description 1
- 230000035939 shock Effects 0.000 description 1
- HBMJWWWQQXIZIP-UHFFFAOYSA-N silicon carbide Chemical compound [Si+]#[C-] HBMJWWWQQXIZIP-UHFFFAOYSA-N 0.000 description 1
- 229910010271 silicon carbide Inorganic materials 0.000 description 1
- 238000001228 spectrum Methods 0.000 description 1
- 229910052727 yttrium Inorganic materials 0.000 description 1
Classifications
-
- 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
-
- B22F1/0003—
-
- 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
-
- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22C—ALLOYS
- C22C38/00—Ferrous alloys, e.g. steel alloys
- C22C38/005—Ferrous alloys, e.g. steel alloys containing rare earths, i.e. Sc, Y, Lanthanides
-
- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22C—ALLOYS
- C22C38/00—Ferrous alloys, e.g. steel alloys
- C22C38/10—Ferrous alloys, e.g. steel alloys containing cobalt
-
- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22C—ALLOYS
- C22C38/00—Ferrous alloys, e.g. steel alloys
- C22C38/12—Ferrous alloys, e.g. steel alloys containing tungsten, tantalum, molybdenum, vanadium, or niobium
-
- 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
- H01F41/0206—Manufacturing of magnetic cores by mechanical means
-
- 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
Landscapes
- Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Power Engineering (AREA)
- Materials Engineering (AREA)
- Mechanical Engineering (AREA)
- Metallurgy (AREA)
- Organic Chemistry (AREA)
- Manufacturing & Machinery (AREA)
- Crystallography & Structural Chemistry (AREA)
- Inorganic Chemistry (AREA)
- Hard Magnetic Materials (AREA)
Abstract
A kind of binding Nd-Fe-B permanent magnetic material, is designated as with percentage by weight, and basic representation is RExFe100‑x‑y‑z‑oByMzNo, wherein, RE is neodymium element, and Fe is ferrum element, and B is boron element, and M is Co element, and N is the one in the elements such as Ti, Cr, Mo, Nb, Zr；X is 22.0～32.4, and y is 4.0～5.85, and z is 3.96～6.01, and o is 0.3～4.82, is played by interpolation transition metal Co, Nb (or Zr) etc. to work in coordination with and improves NdFeB magnetic powder stability, grain size and report coercivity size.The Agglutinate neodymium-iron-boron rare earth permanent-magnetic material of the present invention, has high HCJ, high energy product, high remanent magnetism and the advantage easily magnetized.
Description
The application is a divisional application, and the applying date of female case is on January 27th, 2014；The application number of female case is
201410039752.9；The denomination of invention of female case is " a kind of binding Nd-Fe-B permanent magnetic material and Preparation equipment thereof ".
Technical field
The present invention relates to one and there is high performance rare earth permanent-magnetic material and Preparation equipment thereof, further relate to a kind of bonding neodymium ferrum
Boron rare earth permanent-magnetic material and Preparation equipment thereof, particularly relate to one and have high HCJ, high energy product, high remanent magnetism and easily fill
The Agglutinate neodymium-iron-boron rare earth permanent-magnetic material of magnetic and Preparation equipment thereof.
Prior art
Cohesive neodymium iron boron magnetic particle is the primary raw material preparing boned neodymium iron boron permanent magnet.Agglutinate neodymium-iron-boron has with its proportion
Little, easy-formation and cost performance advantages of higher, be widely used in computer, automobile, military project, medical facilities, electric tool, office set
The fields such as standby, household electrical appliance.
Magnetic device, the miniaturization of electronic product and slimming require permanent magnet material high energy product, high remanent magnetism and easily magnetize.
The performance of cohesive neodymium iron boron magnetic particle directly determines the performance of Agglutinate neodymium-iron-boron magnet, and isotropism cohesive neodymium iron boron magnetic particle performance is wanted
Magnetic energy product is asked to reach 119KJ/m3Above.
The patent of invention entitled " rare earth permanent magnet powder and preparation method thereof and magnet prepared therefrom and magnetic device "
The basic representation of application No.201210518331.5 is [RExRE’(100-x)]yZrzFebalB6.2, wherein, RE selected from Nd, Pr and
One in PrNd, RE ' one or more groups in La, Ce, Pm, Sm, Eu, Gd, Tb, Dy, Ho, Er, Tm, Yb and Lu
Close, 20≤x ＜ 100,9.4≤y≤13.2,1≤z≤5；Preferably, 11≤y≤12.4,1≤z≤3, by rare earth permanent magnet
Powder adds a certain amount of alloying element of compound interpolation simultaneously, it is thus achieved that high density and preferable magnetic property.
Patent application No.201210518331.5 reduces production cost, but, magnetic property cannot meet high energy product,
High remanent magnetism and the high request easily magnetized, it is difficult to adapt to magnetic device, the miniaturization of electronic product and the requirement of slimming.
CN1986856A is by adjusting alloying component and controlling alloy solution temperature, with transition metals such as Nb, Zr, Ti
(M) after the rare earth during part replaces R-Fe-B, by part Fe from R2Fe14B has more than needed out, makes Fe and the transition metal unit having more than needed
Element M forms Fe α M β phase.During fast quenching, Fe α M β phase can suppress R2Fe14B crystal grain is grown up, and makes R2Fe14B crystal grain refines.
In CN1986856A, R is one or more LREEs in Nd, Pr, La, and with the addition of Nb, Zr, Ti and waited
Crossing one or more in metallic element, the flux loss of its magnetic powder is the biggest, all more than 5.6%.
According to the record of the 2nd section of 4-5 row of CN1986856A description page 4, " under usual working condition, crystallization temperature
In the case of relatively low crystallization time is limited, it is perfect, so all containing the amorphous phase of remnants that alloy is difficult to crystallization ", say, that close
Gold the part of crystallization can not just form amorphous phase, can estimate the part that there is not crystallization in amorphous phase with this, and Nb element
Already form crystalline phase with Fe, just exist independent of amorphous phase, be not belonging to amorphous phase.
CN1557004A is expressly recited, and R is one or more the rare earth element comprising Y；In description the 3rd
The 2nd section of the 5th row of page, the 4th section and description page 5 the 3rd section etc. are all recorded, and with the addition of Zr unit in technical scheme disclosed in it
Element, and it refers to sintering rare-earth class permanent magnet field.
CN202315816U only discloses this device and possesses multiple Raw material pail, is not implied by out the ratio control that the present invention mentions
Device processed and measurer.
Summary of the invention
It is an object of the invention to provide a kind of Agglutinate neodymium-iron-boron rare earth permanent-magnetic material and Preparation equipment thereof, it has high intrinsic
Coercivity, high energy product, high remanent magnetism and easily magnetize.
To this end, according to an aspect of the invention, it is provided a kind of binding Nd-Fe-B permanent magnetic material, it is characterised in that with
Percentage by weight is designated as, and basic representation is RExFe100-x-y-z-oByMzNo, wherein, RE is neodymium element, and Fe is ferrum element, and B is boron
Element, M is Co element, and N is the one in the elements such as Ti, Cr, Mo, Nb, Zr；X is 22.0～32.4, and y is 4.0～5.85, z
Being 3.96～6.01, o is 0.3～4.82, plays to work in coordination with by interpolation transition metal Co, Nb (or Zr) etc. and improves neodymium iron boron
Magnetic powder stability, grain size and official report coercivity size.
Preferably, described x is 22.4～31.8, and y is 4.0～5.6, and z is 4.1～5.9, and o is 0.34～4.6.
Preferably, described x is 23.1～30.2, and y is 4.2～5.4, and z is 4.4～5.6, and o is 0.38～4.4.
Preferably, prepared by following process, it may be assumed that by neodymium metal, ferro-boron, ferro-niobium, cobalt etc. is joined by weight percentage
Material, is added in charging tower by measurer, carries out melting, through evacuation, the program of crucible heat insulation in being then added to crucible
After, enter in vacuum quick quenching furnace and carry out fast quenching, wherein, controllable process parameters has temperature, air pressure, vacuum, roll surface linear speed etc., then
Product crystallization after fast quenching is crushed, thus prepares and there is high energy product, high remanent magnetism, the rare earth permanent magnet material of high HCJ
Material.
Preferably, thermal anneal process temperature is at 200 DEG C～780 DEG C, and the thermal annealing time is 0.1～35min.
Preferably, processing 1 hour 150 DEG C of high temperature above, magnetic powder irreversible loss of flux is less than 2%.
According to another aspect of the present invention, it is provided that the Preparation equipment of a kind of cohesive neodymium iron boron magnetic particle, its feature exists
In, including proportioner, it has proportional controller and at least four measurer carrying out dispensing by weight percentage；Vacuum melts
Furnace, it accommodates the material prepared, carries out melting and obtain alloy pig, has smelting apparatus and peeling oxide layer device；Vacuum is fast
Quenching stove, it accommodates the alloy pig that surface is removed the peel oxide layer, carries out fast quenching, has temperature controller, gas pressure regulator, vacuum
Degree controller, roll surface linear speed controller；Crystallization breaker, the product crystallization after fast quenching is crushed by it.
Preferably, also there is the thermal annealing temperatures controller of 200 DEG C～780 DEG C and the thermal annealing time control of 0.1～35min
Device processed.
Preferably, including neodymium element measurer, ferrum element measurer, boron element measurer, cobalt element measurer, niobium zirconium class
Element measurer；Or, including neodymium metal measurer, ferro-boron measurer, ferro-niobium measurer, cobalt element measurer.
Preferably, remembering with percentage by weight, described proportional controller makes neodymium element, boron element, cobalt element, niobium zirconium dvielement
Ratio controls in (22.0～32.4): (4.0～5.85): (3.96～6.01): (0.3～4.82).
Preferably, remembering with percentage by weight, described proportional controller makes neodymium element, boron element, cobalt element, niobium zirconium dvielement
Ratio control in (22.4～31.8): (4.0～5.6): (4.1～5.9): (0.34～4.6).
Preferably, remembering with percentage by weight, described proportional controller makes neodymium element, boron element, cobalt element, niobium zirconium dvielement
Ratio control in (23.1～30.2): (4.2～5.4): (4.4～5.6): (0.38～4.4).
According to the component prescription of Agglutinate neodymium-iron-boron of the present invention, by adding transition metal Co, Nb (or Zr) etc., collaborative
Improve the stability of NdFeB magnetic powder, grain size and report coercivity size.It is designated as with percentage by weight: basic representation is
RExFe100-x-y-z-oByMzNo, wherein, RE is neodymium element, and Fe is ferrum element, and B is boron element, and M is Co element, N is Ti, Cr, Mo,
One in the elements such as Nb, Zr；X is 22.0～32.4, and y is 4.0～5.85, and z is 3.96～6.01, and o is 0.3～4.82.Excellent
Selection of land, described x is 22.4～31.8, and y is 4.0～5.6, and z is 4.1～5.9, and o is 0.34～4.6.It is highly preferred that described x is
23.1～30.2, y are 4.2～5.4, and z is 4.4～5.6, and o is 0.38～4.4.
According to the present invention, by adding neodymium element, and compound with the addition of other transition metal such as Nb (or Zr), Co, it is thus achieved that
High energy product, high HCJ, the binding Nd-Fe-B permanent magnetic material of high remanent magnetism.
According to the present invention, by adding Co in nd-fe-b permanent magnetic alloy, amorphous phase stability, refinement crystalline substance can not only be improved
Grain, cobalt can replace Fe atom simultaneously, strengthens ferromagnetic exchange, improves the official report coercivity of nd-fe-b permanent magnetic alloy.
According to the present invention, niobium (Nb) can enter in amorphous phase in rapid solidification, stablizes amorphous structure, but nothing
Method enters into α-Fe phase and Nd-Fe-B phase, and along with the carrying out of crystallization, Nb is increasingly enriched with in intercrystalline residue amorphous phase,
Make α-Fe nucleation density increase, inhibit growing up of crystal grain simultaneously, strengthen soft magnetism phase and the exchange-coupling interaction of Hard Magnetic phase, improve
The performances such as the stability of product.
According to the present invention, add in the lattice that Zr can enter neodymium iron boron phase, replace the position of Nd atom, improve in alloy real
Border Nd content, and Zr can significantly improve the Amorphous Crystallization temperature of Nd Fe B alloys, and suppression soft magnetism separates out the most too early, refinement crystalline substance
Grain, strengthens soft magnetism phase and the exchange-coupling interaction of Hard Magnetic phase, improves the magnetic property of alloy.
According to the present invention, add Nb and can improve the stability of amorphous phase, crystal grain thinning, improve alloy coercivity, the present invention
By the synergism of compound interpolation Co and Nb, improve the magnetic property of NdFeB magnetic powder.
According to the present invention it is possible to the maximum magnetic energy product preparing NdFeB magnetic powder is 126KJ/m3, remanent magnetism up to 890mT,
Reporting coercivity and may be up to 788KA/m, product has a high energy product, high reports coercivity, high remanent magnetism, and the feature such as easily magnetize, extensively
General it is applicable to magnetic device and the electronic product the highest to miniaturization and slimming requirement.
According to the present invention, reduce the irreversible magnetic flux of magnetic powder, process 1 hour 150 DEG C of high temperature above, irreversible loss
It is less than 2%；
According to the present invention, there is high energy product, high coercivity of reporting, high remanent magnetism and the performance such as easily magnetize.
According to the component prescription of the present invention, by neodymium metal, ferro-boron, ferro-niobium, cobalt etc. carries out dispensing by weight percentage, passes through
Measurer add charging tower in, carry out melting in being then added to crucible, through evacuation, crucible heat insulation program after, enter
Carrying out fast quenching in vacuum quick quenching furnace, wherein, controllable process parameters has, temperature, air pressure, vacuum, roll surface linear speed etc., then by fast quenching
After the techniques such as product crystallization is broken prepare one there is high energy product, high remanent magnetism, the rare earth permanent magnet material of high HCJ
Material, wherein thermal anneal process is preferably 200 DEG C～the temperature range of 780 DEG C, and the thermal annealing time is preferably 0.1～35min.
According to the present invention, the nozzle in the Preparation equipment of binding Nd-Fe-B permanent magnetic material uses silicon carbide material, Jing Guozhen
Empty hot pressed sintering and be machined into bottom threaded post stream shape form, height is 190-250mm, and basal diameter is 25-
30mm, small hole at bottom part a size of 1.2-1.5mm.The post stream nozzle made and traditional oval nozzle, flat nozzle and sector
Other nozzles such as nozzle are compared, and have more preferable resistance to elevated temperatures, heat conductivity, thermal shock resistance and non-oxidizability.At vacuum or gas
Body protection its maximum operation temperature lower can reach 1800-2000 DEG C, improves more than 500 DEG C than traditional nozzle, can continuous work
Make more than 72h.
The Nb element of the present invention enters in amorphous phase in rapid solidification, stablizes amorphous structure, but cannot be introduced into
To α-Fe phase and Nd-Fe-B phase, along with the carrying out of crystallization, Nb is increasingly enriched with in intercrystalline residue amorphous phase, makes α-Fe
Nucleation density increases, and inhibits growing up of crystal grain simultaneously, strengthens soft magnetism phase and the exchange-coupling interaction of Hard Magnetic phase, improves product
The performance such as stability.Visible, the present invention compared with CN1986856A, there is significant difference in the microscopic structure of permanent-magnet alloy,
The transition metal of the present invention does not enter crystalline phase, and the transition metal of CN1986856A enters crystalline phase.
Affect R2Fe14B permanent magnet material it is crucial that composition and microscopic structure, the means controlling microscopic structure are technique skills
Art, the present invention passes through control composition and preparation technology, obtains microscopic structure and be different from the permanent magnet material of CN1986856A, and have
There is high energy product, high report coercivity, high remanent magnetism, easily the feature such as magnetize, meet more and more higher to magnetic device and electronic product
Miniaturization and slimming requirement.
The R of the present invention is to refer exclusively to not only add Nb, Zr, Ti in Nd an element, and technical scheme, also includes Cr, Mo etc.
Transition metal.Further, the flux loss of the present invention is below 2%.
CN1986856A be also not disclosed the present invention " Co replaces Fe atom, strengthens ferromagnetic exchange, improves Nd-Fe-B permanent magnetic and closes
Gold HCJ " technical characteristic.
The Nb element of the present invention enters in amorphous phase in rapid solidification, stablizes amorphous structure, but cannot be introduced into
To α-Fe phase and Nd-Fe-B phase, along with the carrying out of crystallization, Nb is increasingly enriched with in intercrystalline residue amorphous phase, makes α-Fe
Nucleation density increases, and inhibits growing up of crystal grain simultaneously, strengthens soft magnetism phase and the exchange-coupling interaction of Hard Magnetic phase, improves product
The performance such as stability.Visible, the Nb of the present invention is present in amorphous phase all the time, and himself does not form any crystalline phase.
Therefore, in permanent-magnet alloy microstructure, the present invention is different from CN1986856A, the alloy structure of CN1986856A
For: R2Fe14B principal phase, α-Fe soft magnetism phase, Fe2Nb phase and a small amount of amorphous phase；The alloy structure of the present invention is: R2Fe14B master
Phase, α-Fe soft magnetism phase and amorphous phase are (without Fe in alloy2Nb phase).
CN1557004A and CN202315816U does not the most provide and opens about the microstructural technology of permanent magnet material of the present invention
Show.
Accompanying drawing explanation
Fig. 1 is the cohesive neodymium iron boron magnetic particle prepared according to present invention organization chart under a scanning electron microscope, from
It can be seen that granularity of magnet powder is relatively uniform in figure, not having obvious agglomeration, and good dispersion, shape thicknesses compares
Rule.
Fig. 2 is the structural principle schematic diagram of the Preparation equipment of cohesive neodymium iron boron magnetic particle prepared in accordance with the present invention.
Fig. 3 is the cohesive neodymium iron boron magnetic particle prepared according to present invention hysteresis graph at room temperature, can from figure
Going out, the maximum magnetic energy product detected by cohesive neodymium iron boron magnetic particle prepared in accordance with the present invention is 126KJ/m3, HCJ is
756kA/m。
Fig. 4 is the Curie temperature figure of the cohesive neodymium iron boron magnetic particle prepared according to the present invention, it can be seen that this product
Curie temperature is 688K.
Detailed description of the invention
Feature of the present invention is:
(1) by adding Co element in nd-fe-b permanent magnetic alloy, amorphous phase stability can not only be improved, crystal grain thinning,
Cobalt can replace Fe atom simultaneously, strengthens ferromagnetic exchange, improves the official report coercivity of nd-fe-b permanent magnetic alloy.
(2) niobium (Nb) element can enter in amorphous phase in rapid solidification, stablizes amorphous structure, but cannot enter
Entering to α-Fe phase, and Nd-Fe-B phase, along with the carrying out of crystallization, Nb is increasingly enriched with in intercrystalline residue amorphous phase, make α-
Fe nucleation density increases, and inhibits growing up of crystal grain simultaneously, strengthens soft magnetism phase and the exchange-coupling interaction of Hard Magnetic phase, improves product
The performances such as the stability of product.
(3) add Zr and can enter the position replacing Nd atom in the lattice of neodymium iron boron phase, improve actual Nd content in alloy,
And Zr can significantly improve the amorphizing temperature of Nd Fe B alloys, suppression soft magnetism separates out the most too early, and crystal grain thinning strengthens soft magnetism phase
With the exchange-coupling interaction of Hard Magnetic phase, improve the magnetic property of alloy.
(4) adding Nb and can improve the stability of amorphous phase, crystal grain thinning, improve alloy coercivity, the present invention is by compound
Add the synergism of Co and Nb, improve the magnetic property of NdFeB magnetic powder.
(5) can prepare the maximum magnetic energy product of cohesive neodymium iron boron magnetic particle according to the formula of the present invention is 126KJ/m3, surplus
Magnetic, up to 890mT, is reported coercivity and be may be up to 788KA/m, and product has high energy product, high official report coercivity, high remanent magnetism, Yi Chong
The features such as magnetic, it is adaptable to magnetic device and the electronic product the highest to miniaturization and slimming requirement.
Fig. 1 is product of the present invention organization chart under a scanning electron microscope, it can be seen that granularity of magnet powder phase
Contrast more uniform, there is no obvious agglomeration, and good dispersion, shape thicknesses comparison rule.
As in figure 2 it is shown, the Preparation equipment of the cohesive neodymium iron boron magnetic particle according to the present invention, including proportioner 80, it has
Carry out proportional controller and at least four measurer of dispensing by weight percentage；Vacuum melting furnace 100, its receiving prepares
Material, carries out melting and obtains alloy pig, has smelting apparatus 10 and peeling oxide layer device 20；Vacuum quick quenching furnace 200, it accommodates
Surface is removed the peel the alloy pig of oxide layer, carries out fast quenching, there is temperature controller, gas pressure regulator, vacuum degree control device, roller
Upper thread speed controller；Crystallization breaker 300, the product crystallization after fast quenching is crushed by it.
Preferably, there is the thermal annealing temperatures controller of 200 DEG C～780 DEG C and the thermal annealing time of 0.1～35min controls
Device.
Preferably, the first measurer 81 be neodymium element measurer, the second measurer 82 be ferrum element measurer, the 3rd dispensing
Device 83 be boron element measurer, the 4th measurer 84 be cobalt element measurer, the 5th measurer 85 be niobium zirconium dvielement measurer.
Preferably, the first measurer 81 be neodymium metal measurer, the second measurer 82 be ferro-boron measurer, the 3rd measurer
83 be ferro-niobium measurer, the 4th measurer 84 be cobalt element measurer.
Preferably, described proportional controller makes neodymium element, boron element, cobalt element, niobium zirconium dvielement with percentage by weight note
Ratio controls in (22.0～32.4): (4.0～5.85): (3.96～6.01): (0.3～4.82).
Preferably, described proportional controller makes neodymium element, boron element, cobalt element, niobium zirconium dvielement with percentage by weight note
Ratio control in (22.4～31.8): (4.0～5.6): (4.1～5.9): (0.34～4.6).
Preferably, described proportional controller makes neodymium element, boron element, cobalt element, niobium zirconium dvielement with percentage by weight note
Ratio control in (23.1～30.2): (4.2～5.4): (4.4～5.6): (0.38～4.4).
Fig. 3 is cohesive neodymium iron boron magnetic particle of the present invention hysteresis curve figure at room temperature, and wherein, sample number is
20130917-04821509-2, Br are on the occasion of 9123.8G, quality 0.26568g, density 7.6400g/cm3.Time on-test
Being JIUYUE in 2013 8 a.m. on the 17th 33 points 20 seconds, the off-test time is JIUYUE in 2013 8 a.m. on the 17th 37 points 59 seconds, uses
Time 4 points 38 seconds.Result of the test is: (BH)maxIt is negative value-9511.3G for 16.179E+6GOe, Hci.Unit (BH) in Fig. 3max
Representing maximum magnetic energy product, Hci represents HCJ, and Moment/Mass (emu/g) represents magnetic moment/quality, and emu/g represents single
The position degree that is magnetized of quality, g represents gram, and Hint (G) represents the magnetic induction after considering demagnetizing factor.
Fig. 4 is the Curie temperature curve chart of product cohesive neodymium iron boron magnetic particle of the present invention, and M (emu/g) represents the intensity of magnetization.
Tc/K represents Curie temperature.
Embodiment 1:
Implementing the present invention, by each composition of mentioned component formulation ratio, purity is that the rare earth Nd percentage by weight of 99.9% is
28%, Fe-B alloy (wherein B content is 19%), the percentage by weight of B is 4.8%, and the percentage by weight of Co is 5.8%, Nb
Percentage by weight be 4.2%, remaining as Fe content.By individual composition mix homogeneously, under the protection of noble gas argon, enter
Smelting in vacuum melting furnace, melting obtains 30 kilograms of uniform alloy pigs of composition, then is carried out soon by the alloy pig obtained after completing
Quenching process, quick quenching furnace temperature controls at 1400 DEG C, and FFR'S fuel assembly is 32m/s, crushes 40 eye mesh screens after obtaining metal sheet band,
Crystallization 10 minutes at a temperature of 700 DEG C, measure its magnetic property by the sample vibrating specimen magnetometer (VSM) of preparation, and performance is such as
Shown in table 1:
Table 1
Be can be seen that by chart 1 data, in rare earth permanent-magnetic material in the case of magnetic energy product BH (max) keeps performance good,
High energy product, the coercitive product of high official report can be obtained.
Embodiment 2:
The present invention presses each composition of mentioned component formulation ratio, purity be the rare earth Nd percentage by weight of 99.9% be 23%,
Fe-B alloy (wherein B content is 19%), the percentage by weight of B is 4.8%, and the percentage by weight of Co is 5.8%, the weight of Nb
Percentage ratio is 4.2%, remaining as Fe content.By individual composition mix homogeneously, under the protection of noble gas argon, enter vacuum and melt
Smelting in furnace, melting obtains 30 kilograms of uniform alloy pigs of composition, then the alloy pig obtained is carried out rapid quenching after completing,
Quick quenching furnace temperature controls at 1400 DEG C, and FFR'S fuel assembly is 32m/s, and FFR'S fuel assembly is 32m/s, crushes 40 after obtaining metal sheet band
Eye mesh screen, crystallization 10 minutes at a temperature of 700 DEG C, the sample vibrating specimen magnetometer (VSM) of preparation is measured its magnetic property,
Performance is as shown in table 2:
Table 2
Comparative example 1,2 understands, in the case of other parameters are identical, when rare earth neodymium percentage by weight is reduced to from 28%
When 23%, the main magnetic property of magnetic powder the most significantly declines, it is known that, rare earth neodymium content be affect of magnetic particle capability main because of
One of element, and the magnetic property of neodymium percentage by weight 28% is more excellent.
Embodiment 3:
The present invention presses each composition of mentioned component formulation ratio, purity be the rare earth Nd percentage by weight of 99.9% be 28%,
Fe-B alloy (wherein B content is 19%), the percentage by weight of B is 4.8%, and the percentage by weight of Co is 5.8%, the weight of Nb
Percentage ratio is 4.2%, remaining as Fe content.By individual composition mix homogeneously, under the protection of noble gas argon, enter vacuum and melt
Smelting in furnace, melting obtains 30 kilograms of uniform alloy pigs of composition, then the alloy pig obtained is carried out rapid quenching after completing,
Quick quenching furnace temperature controls at 1400 DEG C, and FFR'S fuel assembly is 22m/s, crushes 40 eye mesh screens after obtaining metal sheet band, 700 DEG C of temperature
The lower crystallization of degree 10 minutes, measures its magnetic property by the sample vibrating specimen magnetometer (VSM) of preparation, and performance is as shown in table 3:
Table 3
Comparative example 1,3 understands, in the case of other parameters are identical, when FFR'S fuel assembly from time 32m/s reduce to 22m/s
Time, the main magnetic property of magnetic powder the most significantly declines, it is known that, FFR'S fuel assembly be affect magnetic particle capability a principal element it
One, and the FFR'S fuel assembly of 32m/s is more excellent.
Embodiment 4:
Implement the present invention, sample 13 is prepared asMagnet magnetize after, the baking oven 1 being respectively put into 100 DEG C is little
Time, the baking oven of 120 DEG C 1 hour, the baking oven of 150 DEG C is after 1 hour, and taking-up SF-6 type magnetic-flux meter (1 grade) is measured its magnetic flux and damaged
Lose %, as shown in table 4.
Table 4:
| Sample number into spectrum | Sample 1 | Sample 2 | Sample 3 |
| Heat 1 hour 100 degree of reduction percentage ratio (mWb) | -3.93% | -3.61% | -2.78% |
| Heat 1 hour 120 degree of reduction percentage ratio (mWb) | -1.69% | -1.17% | -1.15% |
| Heat 1 hour 150 degree of reduction percentage ratio (mWb) | -1.17% | -1.15% | -0.57 |
Other embodiments:
X be purity be the rare earth Nd percentage by weight of 99.9%, y is the percentage by weight of B, and z is the percentage by weight of Co,
O is the percentage by weight of Nb, by each composition mix homogeneously, under the protection of noble gas argon, enters smelting in vacuum melting furnace
Refining, melting obtains 30 kilograms of uniform alloy pigs of composition, then the alloy pig obtained is carried out rapid quenching, fast quenching furnace temperature after completing
Degree controls at 1400 DEG C, and FFR'S fuel assembly is 32m/s, crushes 40 eye mesh screens after obtaining metal sheet band, crystallization at a temperature of 700 DEG C
10 minutes, the sample vibrating specimen magnetometer (VSM) of preparation is measured its magnetic property.
Table 5
| x | y | z | o | Br(mT) | Hci(kA/m) | BHmax(KJ/m3) | |
| Embodiment 5 | 22.0 | 3.9 | 3.96 | 0.3 | 795 | 597 | 92 |
| Embodiment 6 | 27.2 | 4.9 | 5.0 | 2.56 | 868 | 750 | 120 |
| Embodiment 7 | 32.4 | 5.85 | 6.01 | 4.82 | 880 | 790 | 123 |
| Embodiment 8 | 23.0 | 5.8 | 5.2 | 0.3 | 810 | 605 | 95 |
| Embodiment 9 | 25.3 | 5.1 | 4.2 | 2.5 | 852 | 710 | 110 |
| Embodiment 10 | 31.0 | 3.9 | 6.0 | 4.8 | 885 | 812 | 125 |
| Embodiment 11 | 23.0 | 4.2 | 4.0 | 0.5 | 821 | 621 | 96 |
| Embodiment 12 | 28.0 | 5.6 | 5.4 | 2.0 | 881 | 790 | 124 |
| Embodiment 13 | 30.0 | 4.6 | 6.0 | 3.5 | 890 | 801 | 127 |
In various embodiments of the present invention, it practice, x can be any numerical value between 22.0～32.4, y can be 4.0
～any numerical value between 5.85, z can be any numerical value between 3.96～6.01, and o can be any number between 0.3～4.82
Value.
Being reached a conclusion by testing data above, NdFeB magnetic powder makes bonded permanent magnet under work in hot environment, flux loss ＜
6%, temperature is the highest, and flux loss more tends towards stability, and shows the serviceability of excellence.
From above several groups of data it can be seen that NdFeB magnetic powder is significantly improved by transition metal such as interpolation Nb, Co
The comprehensive magnetic energy of Agglutinate neodymium-iron-boron, this high-performance powder product suitability is very strong, almost can be used for producing various magnetic material
Material.
In various embodiments of the present invention, it practice, x can be any numerical value between 17.6～32.8, y can be 0.1
～any numerical value between 6.6, z can be any numerical value between 0.1～8, and o can be any numerical value between 0.1～4.8.
Such as, x can be 17.6,17.7,17.8 ..., 19.9,20.1,20.2 ..., 32.6,32.7,32.8；
Y can be 0.1,0.2,0.3,0.4 ..., 3.9,4.0,4.1 ..., 6.4,6.5,6.6；
Z can be 0.1,0.2,0.3 ..., 4.9,5.0,5.1 ..., 7.8,7.9,8.0；
O can be 0.1,0.2,0.3 ..., 2.9,3.0,3.1 ..., 4.6,4.7,4.8.
Claims (10)
1. a binding Nd-Fe-B permanent magnetic material, it is characterised in that
Nb enters in amorphous phase in rapid solidification, stablizes amorphous structure, but cannot be introduced into α-Fe phase and Nd-Fe-B
Phase；Adding Co element in nd-fe-b permanent magnetic alloy, can not only improve amorphous phase stability, crystal grain thinning, Co replaces Fe simultaneously
Atom, strengthens ferromagnetic exchange, improves the HCJ of nd-fe-b permanent magnetic alloy,
Being designated as with percentage by weight, basic representation is RExFe100-x-y-z-oByMzNo, wherein, RE is neodymium element, and Fe is ferrum unit
Element, B is boron element, and M is Co element, and N is the one in the elements such as Ti, Cr, Mo, Nb, Zr；X is 17.6～32.8 (preferably 19.6
～31.0, more preferably 22.0～32.4), y is 0.1～6.6 (preferably 0.1～4.8, more preferably 4.0～5.85), and z is 0.1～8
(preferably 0.1～7.2, more preferably 3.96～6.01), o is that 0.1～4.8 (preferably 0.3～4.82) are (by adding transition metal unit
Elements Co, Nb (or Zr) etc., work in coordination with and improve NdFeB magnetic powder stability, grain size and report coercivity size).
2. binding Nd-Fe-B permanent magnetic material as claimed in claim 1, it is characterised in that preferably, described x be 19.1～
30.2, y is 0.23～5.0, and z is 0.5～7.0, and o is 0.15～3.6, or,
Described x is 22.4～31.8, and y is 4.0～5.6, and z is 4.1～5.9, and o is 0.34～4.6.
3. binding Nd-Fe-B permanent magnetic material as claimed in claim 1, it is characterised in that it is highly preferred that described x be 21.1～
28.2, y is 0.55～4.2, and z is 1.1～5.3, and o is 0.2～3.0, or,
Described x is 23.1～30.2, and y is 4.2～5.4, and z is 4.4～5.6, and o is 0.38～4.4.
4. binding Nd-Fe-B permanent magnetic material as claimed in claim 1, it is characterised in that prepared by following process, it may be assumed that by gold
Belonging to neodymium, ferro-boron, ferro-niobium, cobalt etc. carries out dispensing by weight percentage, is added in charging tower by measurer, is then added to crucible
Inside carry out melting, through evacuation, crucible heat insulation program after, enter in vacuum quick quenching furnace and carry out fast quenching, wherein, controllable process
Parameter has temperature, air pressure, vacuum, roll surface linear speed etc., then the product crystallization after fast quenching is crushed, thus prepares and have high magnetic
Energy product, high remanent magnetism, the rare earth permanent-magnetic material of high HCJ (thermal anneal process preferably 100～820 DEG C (preferably 200～
780 DEG C) temperature range, the thermal annealing time is at 0.1～35min (preferably 2～32min).
5. binding Nd-Fe-B permanent magnetic material as claimed in claim 1, it is characterised in that add neodymium element.
6. binding Nd-Fe-B permanent magnetic material as claimed in claim 1, it is characterised in that process 1 150 DEG C of high temperature above little
Time, magnetic powder irreversible loss of flux is less than 2%.
7. the Preparation equipment of a cohesive neodymium iron boron magnetic particle, it is characterised in that including proportioner, it has by weight percentage
Carry out proportional controller and at least four measurer of dispensing；Vacuum melting furnace, it accommodates the material prepared, carries out melting and closed
Ingot, has smelting apparatus and peeling oxide layer device；Vacuum quick quenching furnace, it accommodates the alloy that surface is removed the peel oxide layer
Ingot, carries out fast quenching, has temperature controller, gas pressure regulator, vacuum degree control device, roll surface linear speed controller；The broken dress of crystallization
Putting, the product crystallization after fast quenching is crushed by it.
8. Preparation equipment as claimed in claim 7, it is characterised in that also there are 100～820 DEG C (preferably 200～780 DEG C)
Thermal annealing temperatures controller and the thermal annealing time controller of 0.1～35min (preferably 2～32min).
9. Preparation equipment as claimed in claim 7, it is characterised in that include that neodymium metal measurer, ferro-boron measurer, ferro-niobium are joined
Glassware, cobalt element measurer.
10. Preparation equipment as claimed in claim 7, it is characterised in that remembering with percentage by weight, described proportional controller makes neodymium
Element, boron element, cobalt element, the ratio of niobium zirconium dvielement control in (17.6～32.8): (0.1～6.6): (0.1～8):
(0.1～4.8)；
Preferably, control in (19.1～30.2): (0.23～5.0): (0.5～7.0): (0.15～3.6)；
It is highly preferred that control in (21.1～28.2): (0.55～4.2): (1.1～5.3): (0.2～3.0), or,
Remembering with percentage by weight, described proportional controller makes neodymium element, boron element, cobalt element, the ratio of niobium zirconium dvielement control
In (22.0～32.4): (4.0～5.85): (3.96～6.01): (0.3～4.82)；
Preferably, control in (22.4～31.8): (4.0～5.6): (4.1～5.9): (0.34～4.6)；
It is highly preferred that control in (23.1～30.2): (4.2～5.4): (4.4～5.6): (0.38～4.4).
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| CN106782979A (en) * | 2014-01-27 | 2017-05-31 | 江西江钨稀有金属新材料股份有限公司 | A kind of binding type rare-earth magnetic and its Preparation equipment |
| CN109637768A (en) * | 2018-12-29 | 2019-04-16 | 中国科学院宁波材料技术与工程研究所 | A kind of rare earth permanent-magnetic material and preparation method thereof containing yttrium |
| CN109637768B (en) * | 2018-12-29 | 2020-07-28 | 中国科学院宁波材料技术与工程研究所 | Yttrium-containing rare earth permanent magnetic material and preparation method thereof |
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Address after: 330013 Jiangxi city in Nanchang Province Economic Development Zone East Shuanggang Street No. 1501 Applicant after: Jiangxi tungsten rare metal new materials Limited by Share Ltd Address before: 330013 Jiangxi city in Nanchang Province Economic Development Zone East Shuanggang Street No. 1501 Applicant before: JXTC Rare Metals New Material Co., Ltd. |
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