CN106024241A - Mesoporous-material-added nickel-plated neodymium-iron-boron magnet and preparation method thereof - Google Patents

Mesoporous-material-added nickel-plated neodymium-iron-boron magnet and preparation method thereof Download PDF

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CN106024241A
CN106024241A CN201610555233.7A CN201610555233A CN106024241A CN 106024241 A CN106024241 A CN 106024241A CN 201610555233 A CN201610555233 A CN 201610555233A CN 106024241 A CN106024241 A CN 106024241A
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neodymium
hour
mesoporous
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powder
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沈军
唐睿
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Anhui One Magnet Electronic Co Ltd
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Anhui One Magnet Electronic Co Ltd
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    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01F—MAGNETS; INDUCTANCES; TRANSFORMERS; SELECTION OF MATERIALS FOR THEIR MAGNETIC PROPERTIES
    • H01F1/00—Magnets or magnetic bodies characterised by the magnetic materials therefor; Selection of materials for their magnetic properties
    • H01F1/01—Magnets or magnetic bodies characterised by the magnetic materials therefor; Selection of materials for their magnetic properties of inorganic materials
    • H01F1/03—Magnets or magnetic bodies characterised by the magnetic materials therefor; Selection of materials for their magnetic properties of inorganic materials characterised by their coercivity
    • H01F1/032—Magnets or magnetic bodies characterised by the magnetic materials therefor; Selection of materials for their magnetic properties of inorganic materials characterised by their coercivity of hard-magnetic materials
    • H01F1/04—Magnets or magnetic bodies characterised by the magnetic materials therefor; Selection of materials for their magnetic properties of inorganic materials characterised by their coercivity of hard-magnetic materials metals or alloys
    • H01F1/047—Alloys characterised by their composition
    • H01F1/053—Alloys characterised by their composition containing rare earth metals
    • H01F1/055—Alloys characterised by their composition containing rare earth metals and magnetic transition metals, e.g. SmCo5
    • H01F1/057—Alloys characterised by their composition containing rare earth metals and magnetic transition metals, e.g. SmCo5 and IIIa elements, e.g. Nd2Fe14B
    • H01F1/0571—Alloys characterised by their composition containing rare earth metals and magnetic transition metals, e.g. SmCo5 and IIIa elements, e.g. Nd2Fe14B in the form of particles, e.g. rapid quenched powders or ribbon flakes
    • H01F1/0572—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 with a protective layer
    • 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
    • B22F1/00—Metallic powder; Treatment of metallic powder, e.g. to facilitate working or to improve properties
    • B22F1/17—Metallic particles coated with metal
    • 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
    • C22C38/002—Ferrous alloys, e.g. steel alloys containing In, Mg, or other elements not provided for in one single group C22C38/001 - C22C38/60
    • 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
    • C22C38/06—Ferrous alloys, e.g. steel alloys containing aluminium
    • 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
    • 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
    • C22C38/14—Ferrous alloys, e.g. steel alloys containing titanium or zirconium
    • 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
    • C22C38/16—Ferrous alloys, e.g. steel alloys containing copper
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01F—MAGNETS; INDUCTANCES; TRANSFORMERS; SELECTION OF MATERIALS FOR THEIR MAGNETIC PROPERTIES
    • H01F1/00—Magnets or magnetic bodies characterised by the magnetic materials therefor; Selection of materials for their magnetic properties
    • H01F1/01—Magnets or magnetic bodies characterised by the magnetic materials therefor; Selection of materials for their magnetic properties of inorganic materials
    • H01F1/03—Magnets or magnetic bodies characterised by the magnetic materials therefor; Selection of materials for their magnetic properties of inorganic materials characterised by their coercivity
    • H01F1/032—Magnets or magnetic bodies characterised by the magnetic materials therefor; Selection of materials for their magnetic properties of inorganic materials characterised by their coercivity of hard-magnetic materials
    • H01F1/04—Magnets or magnetic bodies characterised by the magnetic materials therefor; Selection of materials for their magnetic properties of inorganic materials characterised by their coercivity of hard-magnetic materials metals or alloys
    • H01F1/047—Alloys characterised by their composition
    • H01F1/053—Alloys characterised by their composition containing rare earth metals
    • H01F1/055—Alloys characterised by their composition containing rare earth metals and magnetic transition metals, e.g. SmCo5
    • H01F1/057—Alloys characterised by their composition containing rare earth metals and magnetic transition metals, e.g. SmCo5 and IIIa elements, e.g. Nd2Fe14B
    • H01F1/0571—Alloys characterised by their composition containing rare earth metals and magnetic transition metals, e.g. SmCo5 and IIIa elements, e.g. Nd2Fe14B in the form of particles, e.g. rapid quenched powders or ribbon flakes
    • H01F1/0575—Alloys characterised by their composition containing rare earth metals and magnetic transition metals, e.g. SmCo5 and IIIa elements, e.g. Nd2Fe14B in the form of particles, e.g. rapid quenched powders or ribbon flakes pressed, sintered or bonded together
    • 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
    • H01F41/026—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 protecting methods against environmental influences, e.g. oxygen, by surface treatment
    • 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
    • H01F41/0266—Moulding; Pressing

Abstract

The invention discloses a mesoporous-material-added nickel-plated neodymium-iron-boron magnet which is composed of the following components in percentage by mass: 25-35% of Pr-Nd, 1-2% of B, 0.1-1% of Al, 0-0.2% of Cu, 1-2% of Co, 0.1-1% of Ga, 0.02-0.08% of Nb, 0.01-0.05% of Zr, 0.1-1% of mesoporous silicon dioxide, and the balance of Fe and small amounts of inevitable impurities in the material. By starting with the neodymium-iron-boron magnet raw material powder ground by an air flow grinder, the micron-sized raw material powder is directly coated and plated by nickel, thereby enhancing the corrosion resistance of the neodymium-iron-boron raw material, preventing the powder from aggregating the particle group in the subsequent process, and being beneficial to oriented formation of powder. By adding the mesoporous silicon dioxide, the nano component and neodymium-iron-boron magnet main phase are compounded into the grain boundary phase; and the produced magnet has the advantages of uniform crystal form structure, excellent corrosion resistance, excellent temperature resistance and high coercivity.

Description

A kind of nickel plating neodymium iron boron magnetic body adding mesoporous material and preparation method thereof
Technical field
The present invention relates to rare-earth permanent-magnet material technical field, particularly relate to a kind of nickel plating neodymium ferrum adding mesoporous material Boron magnet and preparation method thereof.
Background technology
Nd-Fe-B permanent magnet material, as the latest result of rare earth permanent-magnetic material development, due to the magnetic property of its excellence And it is referred to as magnetic king, and it is the permanent magnet at present with the strongest magnetic force, its maximum magnetic energy product exceeds ferrite 10 More than Bei, there is small in volume, high magnetic energy product and coercivity, energy density advantages of higher so that Nd-Fe-B permanent magnet material is applied widely in modern industry and electronic technology.
Recently as neodymium iron boron magnetic body at multi-field high speed development, Sintered NdFeB magnet is with superior performance It is widely used in each side, so that computer hardware, instrument and meter, electroacoustic motor, sensor, magnetic separation The miniaturization of equipment, lightweight, the slimmings such as magnetization are possibly realized.Due to micron order neodymium iron boron magnetic body raw material powder The interaction of Van der Waals force, London forces and magnetic force between end makes agglomerates be polymerized to secondary powder particle, is formed Little granule group, causes the poor fluidity of powder, orientation difficulty, ultimately results in Nd-Fe-B permanent magnet material and have The shortcomings such as Curie point is low, temperature characterisitic is poor, easy oxidized corrosion.
Chinese invention patent CN105702405A is pioneering uses nanoscale mesoporous material to add neodymium iron boron magnetic body to Material improves its micro structure and fault of construction, thus improves its coercivity and operating temperature, have an advantage in that Processing technique is simple, crystalline structure is homogeneous, magnet material coercivity is strong, temperature tolerance good, but it does not improve The shortcoming of the easy oxidized corrosion of neodymium iron boron magnetic body, for this present invention neodymium iron boron magnetic body raw material after airflow milling grinds Powder is started with, and micron-sized material powder first carries out plating nickel on surface, and particle surface is coated with one layer of nanoscale nickel dam, Mix with mesoporous silicon oxide again and carry out subsequent technique, thus the shortcoming comprehensively improving neodymium iron boron magnetic body.
Summary of the invention
The present invention is to make up the deficiencies in the prior art, it is provided that a kind of nickel plating neodymium-iron-boron adding mesoporous material Body and preparation method thereof.
The present invention is achieved by the following technical solutions:
A kind of nickel plating neodymium iron boron magnetic body adding mesoporous material, is made up of by mass percentage following component:
Pr-Nd:25-35%, B:1-2%, Al:0.1-1%, Cu:0-0.2%, Co:1-2%, Ga: 0.1-1%, Nb:0.02-0.08%, Zr:0.01-0.05%, mesoporous silicon oxide 0.1-1%, surplus is A small amount of inevitably impurity in Fe and material；
In described Pr-Nd alloy, Nd content is 20-40wt%.
Described a kind of nickel plating neodymium iron boron magnetic body adding mesoporous material, by following component group by mass percentage Become:
Pr-Nd:28-32%, B:1.3-1.7%, Al:0.4-0.6%, Cu:0.05-0.15%, Co: 1.4-1.6%, Ga:0.3-0.7%, Nb:0.04-0.06%, Zr:0.02-0.04%, mesoporous silicon oxide 0.2-0.5%, surplus is a small amount of inevitably impurity in Fe and material；
In described Pr-Nd alloy, Nd content is 20-40wt%.
A kind of described nickel plating neodymium-iron-boron preparation adding mesoporous material, comprises the following steps:
(1) weigh in proportion prepare the raw material Pr-Nd of neodymium iron boron magnetic body, B, Al, Cu, Co, Ga, Nb, Zr, Fe, send in vaccum sensitive stove after oil-free, amphidromic and rustless process, vacuum 10.2-10.6Pa, Being smelted into aluminium alloy under conditions of temperature 1200-1300 DEG C, aluminium alloy is cast to copper roller with the speed of 2-4m/s The alloy sheet that band becomes thickness to be 0.2-0.5mm is got rid of in surface rapid hardening；
(2) above-mentioned alloy sheet is sent into hydrogen crushing furnace, under the hydrogen pressure of 0.6-1.2Mpa, inhales hydrogen 2-4 hour, At a temperature of 500-650 DEG C, dehydrogenation is broken into the coarse powder that particle mean size is 100-200 μm for 6-8 hour again, Coarse powder jet mill is milled under the pressure of 0.12-0.18Mpa the fine powder that particle mean size is 3-4 μm；
(3) by above-mentioned neodymium iron boron raw material fine powder with containing concentration be 200-250g/LNiSO4 6H2O, 25-35g/LNiCl2 6H2O, 30-40g/LH3BO3,0.5-1g/L saccharin sodium, 1-2g/L dodecyl sulfur The nickel plating solution of acid sodium soaks and carries out electroplating surface nickel dam, temperature be 40-60 DEG C, pH be 4.5-5.5, electricity Current density is that electroplating surface stops when within 20-30 minute, being 40-60nm to nickel layer thickness under conditions of 1-2A/dm2 Only；
(4) the above-mentioned neodymium iron boron raw material fine powder deionized water having plated nickel dam is cleaned, filters 4-6 time, then Fine powder freeze-day with constant temperature 4-5 hour at 90-110 DEG C that will have filtered, is cooled to room temperature, under nitrogen protection Stir in three-dimensional material mixer with mesoporous silicon oxide and mix, during batch mixing, add gross weight 0.1-0.3wt% lubrication Batch mixing 3-4 hour after agent, is formed and mixes magnetic powder uniformly；
(5) being weighed by above-mentioned mixing magnetic powder automatic ration in full-automatic molding press, oriented moulding is pressed into Briquet, sends into after Vacuum Package, isostatic cool pressing, stripping oil in vacuum sintering furnace, is incubated at 300-400 DEG C 0.5-1 hour, at 800-900 DEG C, it is incubated 2-3 hour, in temperature 1050-1100 DEG C, vacuum Sinter 4-6 hour under conditions of 0.004-0.006Pa, after cooling, obtain sintered magnet；
(6) above-mentioned sintered magnet is carried out second annealing process, one-level temperature 850-950 DEG C, insulation 3-4 hour, second annealing temperature 450-550 DEG C, insulation 4-5 hour, finally give sintered permanent magnet.
A kind of described nickel plating neodymium-iron-boron preparation adding mesoporous material, neodymium in described step (3) Ferrum boron raw material fine powder quality and nickel plating solution volume ratio are 70-90g:1L.
A kind of described nickel plating neodymium-iron-boron preparation adding mesoporous material, described step (4) intermediary The particle diameter of hole silicon dioxide is 100-200nm, aperture is 10-20nm.
Compared with prior art, the invention have the advantage that
Present invention neodymium iron boron magnetic body material powder after airflow milling grinds is started with, by direct for micron order material powder Cladding nickel plating, powder particle surface one layer of nanoscale nickel dam of cladding, improve the corrosion-resistant of neodymium iron boron material powder Ability, it is therefore prevented that in subsequent process, agglomerates is polymerized to the oriented moulding of granule group, beneficially powder；Mesoporous two The addition of silicon oxide makes nano-component and neodymium iron boron magnetic body principal phase be combined into Grain-Boundary Phase, both can play heterogeneous nucleation Effect, it is also possible to improve neodymium-iron-boron bulk microstructure and defect, improves while remanent magnetism is basically unchanged ensureing The coercivity of magnet, the Sintered NdFeB magnet crystalline structure produced is uniform, temperature tolerance and machining property It is obtained for and is obviously improved, have more the advantages such as excellent corrosion resistance and high-coercive force.
Detailed description of the invention
A kind of nickel plating neodymium iron boron magnetic body adding mesoporous material, is made up of by mass percentage following component:
Pr-Nd:28%, B:1.3%, Al:0.4%, Cu:0.05%, Co:1.4%, Ga:0.3%, Nb: 0.04%, Zr:0.02%, mesoporous silicon oxide 0.2%, surplus is the most miscellaneous in Fe and material Matter；
In described Pr-Nd alloy, Nd content is 20wt%.
A kind of described nickel plating neodymium-iron-boron preparation adding mesoporous material, comprises the following steps:
(1) weigh in proportion prepare the raw material Pr-Nd of neodymium iron boron magnetic body, B, Al, Cu, Co, Ga, Nb, Zr, Fe, send in vaccum sensitive stove, in vacuum 10.2Pa, temperature after oil-free, amphidromic and rustless process Being smelted into aluminium alloy under conditions of spending 1200 DEG C, aluminium alloy is cast to the surface rapid hardening of copper roller with the speed of 2m/s and gets rid of The alloy sheet that band becomes thickness to be 0.2mm；
(2) above-mentioned alloy sheet is sent into hydrogen crushing furnace, under the hydrogen pressure of 0.6Mpa, inhale hydrogen 2 hours, then At a temperature of 500 DEG C, dehydrogenation is broken into the coarse powder that particle mean size is 100 μm for 6 hours, by coarse powder comminution by gas stream Machine is milled to the fine powder that particle mean size is 3 μm under the pressure of 0.12Mpa；
(3) by above-mentioned neodymium iron boron raw material fine powder with containing concentration be 200g/LNiSO4 6H2O, 25g/LNiCl2 6H2O, 30g/LH3BO3,0.5g/L saccharin sodium, the nickel plating of 1g/L sodium lauryl sulphate Solution soaking carries out electroplating surface nickel dam, temperature be 40 DEG C, pH be 4.5, electric current density be 1A/dm2's Under the conditions of electroplating surface 20 minutes to nickel layer thickness stop when being 40nm；
(4) the above-mentioned neodymium iron boron raw material fine powder deionized water having plated nickel dam is cleaned, filters 4 times, then will The fine powder filtered is freeze-day with constant temperature 4 hours at 90 DEG C, are cooled to room temperature, under nitrogen protection with mesoporous two Silicon oxide stirs mixing in three-dimensional material mixer, and after adding gross weight 0.1wt% lubricant during batch mixing, batch mixing 3 is little Time, formed and mix magnetic powder uniformly；
(5) being weighed by above-mentioned mixing magnetic powder automatic ration in full-automatic molding press, oriented moulding is pressed into Briquet, sends in vacuum sintering furnace after Vacuum Package, isostatic cool pressing, stripping oil, is incubated 0.5 at 300 DEG C Hour, at 800 DEG C, it is incubated 2 hours, under conditions of temperature 1050 DEG C, vacuum 0.004Pa, sinters 4 Hour, obtain sintered magnet after cooling；
(6) above-mentioned sintered magnet carrying out second annealing process, one-level temperature 850 DEG C, insulation are 3 little Time, second annealing temperature 450 DEG C, insulation 4 hours, finally give sintered permanent magnet.
A kind of described nickel plating neodymium-iron-boron preparation adding mesoporous material, neodymium in described step (3) Ferrum boron raw material fine powder quality and nickel plating solution volume ratio are 70g:1L.
A kind of described nickel plating neodymium-iron-boron preparation adding mesoporous material, described step (4) intermediary The particle diameter of hole silicon dioxide is 100nm, aperture is 10nm.

Claims (5)

1. the nickel plating neodymium iron boron magnetic body adding mesoporous material, it is characterised in that pressed percent mass by following component Than composition:
Pr-Nd:25-35%, B:1-2%, Al:0.1-1%, Cu:0-0.2%, Co:1-2%, Ga:0.1-1%, Nb:0.02-0.08%, Zr:0.01-0.05%, mesoporous silicon oxide 0.1-1%, surplus is in Fe and material A small amount of inevitably impurity；
In described Pr-Nd alloy, Nd content is 20-40wt%.
A kind of nickel plating neodymium iron boron magnetic body adding mesoporous material the most according to claim 1, it is characterised in that It is made up of by mass percentage following component:
Pr-Nd:28-32%, B:1.3-1.7%, Al:0.4-0.6%, Cu:0.05-0.15%, Co:1.4-1.6%, Ga:0.3-0.7%, Nb:0.04-0.06%, Zr:0.02-0.04%, mesoporous silicon oxide 0.2-0.5%, Surplus is a small amount of inevitably impurity in Fe and material；
In described Pr-Nd alloy, Nd content is 20-40wt%.
3. a nickel plating neodymium-iron-boron preparation for interpolation mesoporous material as claimed in claim 1, it is special Levy and be to comprise the following steps:
(1) weigh in proportion prepare the raw material Pr-Nd of neodymium iron boron magnetic body, B, Al, Cu, Co, Ga, Nb, Zr, Fe, send in vaccum sensitive stove after oil-free, amphidromic and rustless process, vacuum 10.2-10.6Pa, Being smelted into aluminium alloy under conditions of temperature 1200-1300 DEG C, aluminium alloy is cast to copper roller with the speed of 2-4m/s The alloy sheet that band becomes thickness to be 0.2-0.5mm is got rid of in surface rapid hardening；
(2) above-mentioned alloy sheet is sent into hydrogen crushing furnace, under the hydrogen pressure of 0.6-1.2Mpa, inhales hydrogen 2-4 hour, At a temperature of 500-650 DEG C, dehydrogenation is broken into the coarse powder that particle mean size is 100-200 μm for 6-8 hour again, Coarse powder jet mill is milled under the pressure of 0.12-0.18Mpa the fine powder that particle mean size is 3-4 μm；
(3) by above-mentioned neodymium iron boron raw material fine powder with containing concentration be 200-250g/LNiSO4 6H2O, 25-35g/LNiCl2 6H2O, 30-40g/LH3BO3,0.5-1g/L saccharin sodium, 1-2g/L dodecyl sulfur The nickel plating solution of acid sodium soaks and carries out electroplating surface nickel dam, temperature be 40-60 DEG C, pH be 4.5-5.5, electricity Current density is that electroplating surface stops when within 20-30 minute, being 40-60nm to nickel layer thickness under conditions of 1-2A/dm2；
(4) the above-mentioned neodymium iron boron raw material fine powder deionized water having plated nickel dam is cleaned, filters 4-6 time, then will The fine powder filtered is freeze-day with constant temperature 4-5 hour at 90-110 DEG C, is cooled to room temperature, under nitrogen protection with Mesoporous silicon oxide stirs mixing in three-dimensional material mixer, adds gross weight 0.1-0.3wt% lubricant during batch mixing Rear batch mixing 3-4 hour, is formed and mixes magnetic powder uniformly；
(5) being weighed by above-mentioned mixing magnetic powder automatic ration in full-automatic molding press, oriented moulding is pressed into base Block, sends in vacuum sintering furnace after Vacuum Package, isostatic cool pressing, stripping oil, is incubated 0.5-1 at 300-400 DEG C Hour, at 800-900 DEG C, it is incubated 2-3 hour, in temperature 1050-1100 DEG C, vacuum 0.004-0.006Pa Under conditions of sinter 4-6 hour, obtain sintered magnet after cooling；
(6) above-mentioned sintered magnet is carried out second annealing process, one-level temperature 850-950 DEG C, insulation 3-4 Hour, second annealing temperature 450-550 DEG C, insulation 4-5 hour, finally give sintered permanent magnet.
4. a nickel plating neodymium-iron-boron preparation for interpolation mesoporous material as claimed in claim 3, it is special Levy and be in described step (3) that neodymium iron boron raw material fine powder quality and nickel plating solution volume ratio are 70-90g:1L.
5. a nickel plating neodymium-iron-boron preparation for interpolation mesoporous material as claimed in claim 3, it is special Levy be the particle diameter of described step (4) intermediary hole silicon dioxide be 100-200nm, aperture be 10-20nm.
CN201610555233.7A 2016-07-14 2016-07-14 Mesoporous-material-added nickel-plated neodymium-iron-boron magnet and preparation method thereof Pending CN106024241A (en)

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Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN112002514A (en) * 2020-08-25 2020-11-27 成都银磁材料有限公司 Injection molding magnet and preparation method thereof

Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN105551707A (en) * 2016-02-25 2016-05-04 廊坊京磁精密材料有限公司 Neodymium iron boron magnet raw material powder and treatment process therefor
CN105702405A (en) * 2016-04-29 2016-06-22 湖北工程学院 Nano composite NdFeB (neodymium iron boron) permanent magnetic material and preparation method

Patent Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN105551707A (en) * 2016-02-25 2016-05-04 廊坊京磁精密材料有限公司 Neodymium iron boron magnet raw material powder and treatment process therefor
CN105702405A (en) * 2016-04-29 2016-06-22 湖北工程学院 Nano composite NdFeB (neodymium iron boron) permanent magnetic material and preparation method

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
张秀芝等: "钕铁硼永磁体电镀镍工艺优化及镀层性能", 《电镀与涂饰》 *

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN112002514A (en) * 2020-08-25 2020-11-27 成都银磁材料有限公司 Injection molding magnet and preparation method thereof

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