CN110483031A - Permanent-magnet ferrite magnetic material resistant to high temperature and preparation method thereof - Google Patents
Permanent-magnet ferrite magnetic material resistant to high temperature and preparation method thereof Download PDFInfo
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Abstract
The invention discloses a kind of permanent-magnet ferrite magnetic materials resistant to high temperature, comprise the following components in parts by weight: 60~80 parts by weight of iron powder；14~18 parts by weight of neodymium powder；5~10 parts by weight of boron powder；2~4 parts by weight of praseodymium.3~5 parts by weight of kaolin.Permanent-magnet ferrite magnetic material resistant to high temperature of the invention, permanent-magnet material magnetic property obtained is higher at high temperature for permanent-magnet ferrite magnetic material, it can all be greatly improved compared with the Agglutinate neodymium-iron-boron magnet magnetic property of same class at high temperature, can reach the effect for maintaining high magnetic characteristics in the event of high temperatures.
Description
Technical field
The present invention relates to a kind of permanent-magnet materials, more particularly to a kind of permanent-magnet ferrite magnetic material resistant to high temperature and its system
Preparation Method.
Background technique
The advantages of ndfeb magnet is cost performance height, has good mechanical property；It is disadvantageous in that Curie point is low,
Temperature characterisitic is poor, and is easy to dusting corrosion, it is necessary to by adjusting its chemical component and surface treatment method be taken to be allowed to be changed
Into can be only achieved the requirement of practical application.
Neodymium iron boron magnetic body is divided into slug type and two kinds of binding type according to production method difference.Compared with sintered permanent magnet, glue
Connect magnet with cost performance high, special-shaped magnet convenient formation, machining accuracy height, good toughness, magnetic deviation is small and is easy to minimize
Many advantages, such as, these features have conformed exactly to the developing direction of electronic information complete product " light, thin, short, small ", therefore are bonded
Magnet is widely used in the fields such as computer, mobile communication, advanced audio, small and special electric machine, sensor and magneto-electric instrument and meter.
With the continuous expansion of rare-earth magnet application range, such as starting motor of automobile, Motor product and integrated CO-ROM, hard disk master
Spindle motor HDD, other micro- special direct current generator and automation instrument etc. fields are widely used to Agglutinate neodymium-iron-boron range of needs
Expansion, how to improve the temperature tolerance of Sintered NdFeB magnet is a kind of new challenge to its market application range is expanded.
In the prior art, Chinese invention patent CN101740193B, denomination of invention are as follows: a kind of high magnetic characteristics high resistivity
It is referred in the patent of rare-earth permanent magnet and preparation method thereof from high-performance magnetic powder surface insulation processing technique and magnet temperature and pressure
Oriented moulding technology is started with, and does not add insulation additive, has studied magnetic powder surface coupling process, is resin dedicated with coupling magnetic powder
Hybrid technique, magnet temperature and pressure oriented moulding technique etc., solve magnetic powder with it is resin dedicated it is Nian Jie loosely, it is resin dedicated in magnetic powder table
Magnet magnetic property improves a series of problems, such as limited after bread covers imperfect, resin dedicated easy to reunite during processing, molding,
In terms of its result, electrical insulation capability is obviously improved really, but high temperature resistance is unsatisfactory, how to develop high temperature resistant
Permanent-magnet material becomes development trend.
Summary of the invention
In view of the above shortcomings, it is an object of the invention to develop a permanent-magnet ferrite magnetic material resistant to high temperature,
It is with excellent high temperature resistance.
Technical solution of the present invention is summarized as follows:
A kind of permanent-magnet ferrite magnetic material resistant to high temperature, wherein comprise the following components in parts by weight:
Preferably, the permanent-magnet ferrite magnetic material resistant to high temperature, wherein the rare earth alloy layer further includes 2
The thulium of~4 parts by weight.
Preferably, the permanent-magnet ferrite magnetic material resistant to high temperature, wherein the rare earth alloy layer further includes
The lutetium of 0.5~1 parts by weight.
Preferably, the permanent-magnet ferrite magnetic material resistant to high temperature, wherein the rare earth alloy layer further includes 4
The tantalum of~8 parts by weight.
Preferably, the permanent-magnet ferrite magnetic material resistant to high temperature, wherein the rare earth alloy layer further includes 5
The cobalt of~10 parts by weight and 0.05~0.1 parts by weight copper.
Preferably, the permanent-magnet ferrite magnetic material resistant to high temperature, wherein the rare earth alloy layer further includes 1
The adhesive of~2 parts by weight, the lubricant of 2~4 parts by weight, 0.5~1 parts by weight vinyltrimethoxysilane.
Preferably, the permanent-magnet ferrite magnetic material resistant to high temperature, wherein the rare earth alloy layer further includes 2
The yttria-stabilized zirconia of~4 parts of barium monoxide and 1~3 parts by weight.
Preferably, the permanent-magnet ferrite magnetic material resistant to high temperature, wherein the lubricant include 25~
30wt%2- imidazolidinone, 45~50wt% oleic acid and 25~30wt% molybdenum disulfide.
Preferably, the permanent-magnet ferrite magnetic material resistant to high temperature, wherein described adhesive include 25~
30wt% epoxy resin, 65~80wt% tetrafluoroethylene-Ethylene-acetate ethylene copolymer.
A kind of preparation method of permanent-magnet ferrite magnetic material resistant to high temperature, wherein include the following steps:
1) above-mentioned iron powder, neodymium powder, boron powder, praseodymium, thulium, lutetium, tantalum, cobalt, copper are mixed, uniform stirring, and 1000~1200
Heat to obtain mixture A at DEG C；
2) it is added to after mixing vinyltrimethoxysilane with the organic solvent of 20~50 parts by weight in mixture A,
Solution is formed, is uniformly mixed above-mentioned solution by 0.5~2h of high shear agitation of 500~2000 revs/min of speed, and lead to
Crossing 0.5~2h of supersonic oscillations enables mixture A to be sufficiently mixed with vinyltrimethoxysilane, then stirs mixture side
Side heating is mixed, until solvent volatilization finishes, grinding obtains mixture B after powder is dried；
3) above-mentioned adhesive, lubricant, kaolin, barium monoxide, yttria-stabilized zirconia are added in mixture B,
Even stirring, and pre-burning is carried out under air, calcined temperature is 1100~1150 DEG C, coarse crushing is carried out after raw material natural cooling,
Obtain mixture C；
4) 1~2 times of water will be added in mixture C, is placed in ball mill and carries out ball milling, being milled to slurry partial size is 2
It~4 μm, is then dried in 100~110 DEG C, obtains mixture D；
5) mixture D is placed in Muffle furnace and is calcined, be warming up to 120~140 DEG C, then natural cooling cooling is to get institute
State permanent-magnet ferrite magnetic material.
The beneficial effects of the present invention are:
Permanent-magnet ferrite magnetic material resistant to high temperature of the invention, permanent-magnet ferrite magnetic material at high temperature it is obtained forever
Magnetic magnetism of material can be higher, can all be greatly improved compared with the Agglutinate neodymium-iron-boron magnet magnetic property of same class at high temperature,
It can reach the effect for maintaining high magnetic characteristics in the event of high temperatures.
Specific embodiment
The present invention will be further described in detail below with reference to the embodiments, to enable those skilled in the art referring to specification
Text can be implemented accordingly.
This case proposes a kind of permanent-magnet ferrite magnetic material resistant to high temperature, wherein comprises the following components in parts by weight:
Nd-Fe-B permanent magnet material is the permanent-magnet material based on intermetallic compound Nd2Fe14B.Main component is rare earth
Element neodymium (Nd), iron (Fe), boron (B), boron make compound have high saturation and magnetic intensity, high uniaxial anisotropy and high
Curie temperature；The addition of praseodymium powder can obtain thinner grain structure, improve plasticity, the toughness of magnet.It is high by being added
Impact flexibility, the heat resistance of ridge soil raising magnetic material.
As the another embodiment of this case, wherein rare earth alloy layer further includes the thulium of 2~4 parts by weight.
As the another embodiment of this case, wherein rare earth alloy layer further includes the lutetium of 0.5~1 parts by weight.
As the another embodiment of this case, wherein rare earth alloy layer further includes the tantalum of 4~8 parts by weight.
As the another embodiment of this case, wherein rare earth alloy layer further includes the cobalt and 0.05~0.1 weight of 5~10 parts by weight
Measure part copper.
The addition of thulium, lutetium, tantalum, cobalt, copper can obtain thinner grain structure, improve plasticity, the toughness of magnet；It is logical
Addition high-melting-point element and low melting point element are crossed, low melting point element copper and cobalt are first dissolved in intergranular, and liquid phase is sent out in course of dissolution
Raw physical and chemical properties variation, improves the dissolubility of high-melting-point element in the liquid phase, is allowed to be uniformly distributed in intergranular region,
And high-melting-point element can hinder growing up for crystal grain, refinement crystal grain adds in magnet so that the obdurability of magnet be made to be improved
After high-melting-point element thulium, lutetium, tantalum element, due to crystal grain refinement, the ferrite sintered body magnet with higher impact toughness is obtained.
As the another embodiment of this case, wherein rare earth alloy layer further includes the adhesive of 1~2 parts by weight, 2~4 parts by weight
Lubricant, 0.5~1 part of vinyltrimethoxysilane.
As the another embodiment of this case, wherein rare earth alloy layer further includes the barium monoxide and 1~3 weight of 2~4 parts by weight
The yttria-stabilized zirconia of part.In order to obtain the magnet material with higher high temperature resistance, corrosion resistance, this case is drawn again
Enter and has played high temperature resistance, the barium monoxide of corrosion resistance, yttria-stabilized zirconia with collaboration.Stabilized with yttrium oxide oxidation
Zirconium is 8% yttria-stabilized zirconia.
As the another embodiment of this case, wherein lubricant includes 25~30wt%2- imidazolidinone, 45~50wt% oleic acid
With 25~30wt% molybdenum disulfide.By the way that lubricant is added, the mobility of magnetic material is improved.
As the another embodiment of this case, wherein adhesive includes 25~30wt% epoxy resin, 65~80wt% tetrafluoro second
Alkene-ethylene-vinyl acetate copolymer.Magnetic field structure state becomes between ferrite magnetic powder particles in adhesives magnet
Change, substantially increase the magnetic property of magnet under high temperature, and magnet weightlessness can be effectively reduced, improves the heat-resisting quantity of magnet
Energy.
A kind of preparation method of permanent-magnet ferrite magnetic material resistant to high temperature, wherein include the following steps:
1) above-mentioned iron powder, neodymium powder, boron powder, praseodymium, thulium, lutetium, tantalum, cobalt, copper are mixed, uniform stirring, and 1000~1200
Heat to obtain mixture A at DEG C；
2) it is added to after mixing vinyltrimethoxysilane with the organic solvent of 20~50 parts by weight in mixture A,
Solution is formed, is uniformly mixed above-mentioned solution by 0.5~2h of high shear agitation of 500~2000 revs/min of speed, and lead to
Crossing 0.5~2h of supersonic oscillations enables mixture A to be sufficiently mixed with vinyltrimethoxysilane, then stirs mixture side
Side heating is mixed, until solvent volatilization finishes, grinding obtains mixture B after powder is dried；
3) above-mentioned adhesive, lubricant, kaolin, barium monoxide, yttria-stabilized zirconia are added in mixture B,
Even stirring, and pre-burning is carried out under air, calcined temperature is 1100~1150 DEG C, coarse crushing is carried out after raw material natural cooling,
Obtain mixture C；
4) 1~2 times of water will be added in mixture C, is placed in ball mill and carries out ball milling, being milled to slurry partial size is 2
It~4 μm, is then dried in 100~110 DEG C, obtains mixture D；
5) mixture D is placed in Muffle furnace and is calcined, be warming up to 120~140 DEG C, then natural cooling cooling is to get institute
State permanent-magnet ferrite magnetic material.
Specific embodiment and comparative example is listed below:
Embodiment 1:
A kind of permanent-magnet ferrite magnetic material resistant to high temperature, comprises the following components in parts by weight:
Lubricant includes 25wt%2- imidazolidinone, 45wt% oleic acid and 30wt% molybdenum disulfide；Adhesive includes
25wt% epoxy resin, 75wt% tetrafluoroethylene-Ethylene-acetate ethylene copolymer.
A kind of preparation method of permanent-magnet ferrite magnetic material resistant to high temperature, includes the following steps:
1) above-mentioned iron powder, neodymium powder, boron powder, praseodymium, thulium, lutetium, tantalum, cobalt, copper are mixed, uniform stirring, and add at 1000 DEG C
It is heat-treated to obtain mixture A；
2) it will be added to after the methane blended of vinyltrimethoxysilane and 20 parts by weight in mixture A, form solution,
Above-mentioned solution is uniformly mixed by the high shear agitation 0.5h of 500 revs/min of speed, and is made by supersonic oscillations 0.5h
Obtaining mixture A can be sufficiently mixed with vinyltrimethoxysilane, then heat mixture while stirring, until solvent volatilizees
It finishes, grinding obtains mixture B after powder is dried；
3) above-mentioned adhesive, lubricant, kaolin, barium monoxide, yttria-stabilized zirconia are added in mixture B,
Even stirring, and pre-burning is carried out under air, calcined temperature is 1100 DEG C, and coarse crushing is carried out after raw material natural cooling, must be mixed
Object C；
4) 1 times of water will be added in mixture C, is placed in ball mill and carries out ball milling, being milled to slurry partial size is 2 μm,
Then it is dried in 100 DEG C, obtains mixture D；
5) mixture D is placed in Muffle furnace and is calcined, be warming up to 120 DEG C, then natural cooling cooling is to get the permanent magnetism
Ferrite magnetic material.
Embodiment 2:
A kind of permanent-magnet ferrite magnetic material resistant to high temperature, comprises the following components in parts by weight:
Lubricant includes 28wt%2- imidazolidinone, 46wt% oleic acid and 26wt% molybdenum disulfide；Adhesive includes
28wt% epoxy resin, 72wt% tetrafluoroethylene-Ethylene-acetate ethylene copolymer.
A kind of preparation method of permanent-magnet ferrite magnetic material resistant to high temperature, includes the following steps:
1) above-mentioned iron powder, neodymium powder, boron powder, praseodymium, thulium, lutetium, tantalum, cobalt, copper are mixed, uniform stirring, and add at 1100 DEG C
It is heat-treated to obtain mixture A；
2) it will be added to after the methane blended of vinyltrimethoxysilane and 40 parts by weight in mixture A, form solution,
Above-mentioned solution is uniformly mixed by the high shear agitation 1h of 1000 revs/min of speed, and is made by supersonic oscillations 1h
Mixture A can be sufficiently mixed with vinyltrimethoxysilane, then heat mixture while stirring, until solvent is evaporated completely
Finish, grinding obtains mixture B after powder is dried；
3) above-mentioned adhesive, lubricant, kaolin, barium monoxide, yttria-stabilized zirconia are added in mixture B,
Even stirring, and pre-burning is carried out under air, calcined temperature is 1100 DEG C, and coarse crushing is carried out after raw material natural cooling, must be mixed
Object C；
4) 1.5 times of water will be added in mixture C, is placed in ball mill and carries out ball milling, being milled to slurry partial size is 3 μ
Then m is dried in 100 DEG C, obtains mixture D；
5) mixture D is placed in Muffle furnace and is calcined, be warming up to 130 DEG C, then natural cooling cooling is to get the permanent magnetism
Ferrite magnetic material.
Embodiment 3:
A kind of permanent-magnet ferrite magnetic material resistant to high temperature, comprises the following components in parts by weight:
Lubricant includes 30wt%2- imidazolidinone, 45wt% oleic acid and 25wt% molybdenum disulfide；Adhesive includes
30wt% epoxy resin, 70wt% tetrafluoroethylene-Ethylene-acetate ethylene copolymer.
A kind of preparation method of permanent-magnet ferrite magnetic material resistant to high temperature, includes the following steps:
1) above-mentioned iron powder, neodymium powder, boron powder, praseodymium, thulium, lutetium, tantalum, cobalt, copper are mixed, uniform stirring, and add at 1200 DEG C
It is heat-treated to obtain mixture A；
2) it will be added to after the methane blended of vinyltrimethoxysilane and 50 parts by weight in mixture A, form solution,
Above-mentioned solution is uniformly mixed by the high shear agitation 2h of 2000 revs/min of speed, and is made by supersonic oscillations 2h
Mixture A can be sufficiently mixed with vinyltrimethoxysilane, then heat mixture while stirring, until solvent is evaporated completely
Finish, grinding obtains mixture B after powder is dried；
3) above-mentioned adhesive, lubricant, kaolin, barium monoxide, yttria-stabilized zirconia are added in mixture B,
Even stirring, and pre-burning is carried out under air, calcined temperature is 1150 DEG C, and coarse crushing is carried out after raw material natural cooling, must be mixed
Object C；
4) 2 times of water will be added in mixture C, is placed in ball mill and carries out ball milling, being milled to slurry partial size is 4 μm,
Then it is dried in 110 DEG C, obtains mixture D；
5) mixture D is placed in Muffle furnace and is calcined, be warming up to 140 DEG C, then natural cooling cooling is to get the permanent magnetism
Ferrite magnetic material.
Comparative example 1:
A kind of permanent-magnet ferrite magnetic material resistant to high temperature, comprises the following components in parts by weight:
Lubricant includes 25wt%2- imidazolidinone, 45wt% oleic acid and 30wt% molybdenum disulfide；Adhesive includes
25wt% epoxy resin, 75wt% tetrafluoroethylene-Ethylene-acetate ethylene copolymer.
A kind of preparation method of permanent-magnet ferrite magnetic material resistant to high temperature, includes the following steps:
1) above-mentioned iron powder, neodymium powder, boron powder, praseodymium, lutetium, tantalum, cobalt, copper are mixed, uniform stirring, and at 1000 DEG C at heating
Manage to obtain mixture A；
2) it will be added to after the methane blended of vinyltrimethoxysilane and 20 parts by weight in mixture A, form solution,
Above-mentioned solution is uniformly mixed by the high shear agitation 0.5h of 500 revs/min of speed, and is made by supersonic oscillations 0.5h
Obtaining mixture A can be sufficiently mixed with vinyltrimethoxysilane, then heat mixture while stirring, until solvent volatilizees
It finishes, grinding obtains mixture B after powder is dried；
3) above-mentioned adhesive, lubricant, kaolin, barium monoxide, yttria-stabilized zirconia are added in mixture B,
Even stirring, and pre-burning is carried out under air, calcined temperature is 1100 DEG C, and coarse crushing is carried out after raw material natural cooling, must be mixed
Object C；
4) 1 times of water will be added in mixture C, is placed in ball mill and carries out ball milling, being milled to slurry partial size is 2 μm,
Then it is dried in 100 DEG C, obtains mixture D；
5) mixture D is placed in Muffle furnace and is calcined, be warming up to 120 DEG C, then natural cooling cooling is to get the permanent magnetism
Ferrite magnetic material.
Comparative example 2:
A kind of permanent-magnet ferrite magnetic material resistant to high temperature, comprises the following components in parts by weight:
Lubricant includes 25wt%2- imidazolidinone, 45wt% oleic acid and 30wt% molybdenum disulfide；Adhesive includes
25wt% epoxy resin, 75wt% tetrafluoroethylene-Ethylene-acetate ethylene copolymer.
A kind of preparation method of permanent-magnet ferrite magnetic material resistant to high temperature, includes the following steps:
1) above-mentioned iron powder, neodymium powder, boron powder, praseodymium, thulium, tantalum, cobalt, copper are mixed, uniform stirring, and at 1000 DEG C at heating
Manage to obtain mixture A；
2) it will be added to after the methane blended of vinyltrimethoxysilane and 20 parts by weight in mixture A, form solution,
Above-mentioned solution is uniformly mixed by the high shear agitation 0.5h of 500 revs/min of speed, and is made by supersonic oscillations 0.5h
Obtaining mixture A can be sufficiently mixed with vinyltrimethoxysilane, then heat mixture while stirring, until solvent volatilizees
It finishes, grinding obtains mixture B after powder is dried；
3) above-mentioned adhesive, lubricant, kaolin, barium monoxide, yttria-stabilized zirconia are added in mixture B,
Even stirring, and pre-burning is carried out under air, calcined temperature is 1100 DEG C, and coarse crushing is carried out after raw material natural cooling, must be mixed
Object C；
4) 1 times of water will be added in mixture C, is placed in ball mill and carries out ball milling, being milled to slurry partial size is 2 μm,
Then it is dried in 100 DEG C, obtains mixture D；
5) mixture D is placed in Muffle furnace and is calcined, be warming up to 120 DEG C, then natural cooling cooling is to get the permanent magnetism
Ferrite magnetic material.
Comparative example 3:
A kind of permanent-magnet ferrite magnetic material resistant to high temperature, comprises the following components in parts by weight:
Lubricant includes 28wt%2- imidazolidinone, 46wt% oleic acid and 26wt% molybdenum disulfide；Adhesive includes
28wt% epoxy resin, 72wt% tetrafluoroethylene-Ethylene-acetate ethylene copolymer.
A kind of preparation method of permanent-magnet ferrite magnetic material resistant to high temperature, includes the following steps:
1) above-mentioned iron powder, neodymium powder, boron powder, praseodymium, thulium, lutetium, tantalum, cobalt are mixed, uniform stirring, and at 1100 DEG C at heating
Manage to obtain mixture A；
2) it will be added to after the methane blended of vinyltrimethoxysilane and 40 parts by weight in mixture A, form solution,
Above-mentioned solution is uniformly mixed by the high shear agitation 1h of 1000 revs/min of speed, and is made by supersonic oscillations 1h
Mixture A can be sufficiently mixed with vinyltrimethoxysilane, then heat mixture while stirring, until solvent is evaporated completely
Finish, grinding obtains mixture B after powder is dried；
3) above-mentioned adhesive, lubricant, kaolin, barium monoxide, yttria-stabilized zirconia are added in mixture B,
Even stirring, and pre-burning is carried out under air, calcined temperature is 1100 DEG C, and coarse crushing is carried out after raw material natural cooling, must be mixed
Object C；
4) 1.5 times of water will be added in mixture C, is placed in ball mill and carries out ball milling, being milled to slurry partial size is 3 μ
Then m is dried in 100 DEG C, obtains mixture D；
5) mixture D is placed in Muffle furnace and is calcined, be warming up to 130 DEG C, then natural cooling cooling is to get the permanent magnetism
Ferrite magnetic material.
Comparative example 4:
A kind of permanent-magnet ferrite magnetic material resistant to high temperature, comprises the following components in parts by weight:
Lubricant is oleic acid；Adhesive includes that 28wt% epoxy resin, 72wt% tetrafluoroethylene-Ethylene-vinyl acetate are total
Polymers.
A kind of preparation method of permanent-magnet ferrite magnetic material resistant to high temperature, includes the following steps:
1) above-mentioned iron powder, neodymium powder, boron powder, praseodymium, thulium, lutetium, tantalum, cobalt, copper are mixed, uniform stirring, and add at 1100 DEG C
It is heat-treated to obtain mixture A；
2) it will be added to after the methane blended of vinyltrimethoxysilane and 40 parts by weight in mixture A, form solution,
Above-mentioned solution is uniformly mixed by the high shear agitation 1h of 1000 revs/min of speed, and is made by supersonic oscillations 1h
Mixture A can be sufficiently mixed with vinyltrimethoxysilane, then heat mixture while stirring, until solvent is evaporated completely
Finish, grinding obtains mixture B after powder is dried；
3) above-mentioned adhesive, lubricant, kaolin, barium monoxide, yttria-stabilized zirconia are added in mixture B,
Even stirring, and pre-burning is carried out under air, calcined temperature is 1100 DEG C, and coarse crushing is carried out after raw material natural cooling, must be mixed
Object C；
4) 1.5 times of water will be added in mixture C, is placed in ball mill and carries out ball milling, being milled to slurry partial size is 3 μ
Then m is dried in 100 DEG C, obtains mixture D；
5) mixture D is placed in Muffle furnace and is calcined, be warming up to 130 DEG C, then natural cooling cooling is to get the permanent magnetism
Ferrite magnetic material.
Comparative example 5:
A kind of permanent-magnet ferrite magnetic material resistant to high temperature, comprises the following components in parts by weight:
Lubricant includes 30wt%2- imidazolidinone, 45wt% oleic acid and 25wt% molybdenum disulfide；Adhesive is asphalt mixtures modified by epoxy resin
Rouge.
A kind of preparation method of permanent-magnet ferrite magnetic material resistant to high temperature, includes the following steps:
1) above-mentioned iron powder, neodymium powder, boron powder, praseodymium, thulium, lutetium, tantalum, cobalt, copper are mixed, uniform stirring, and add at 1200 DEG C
It is heat-treated to obtain mixture A；
2) it will be added to after the methane blended of vinyltrimethoxysilane and 50 parts by weight in mixture A, form solution,
Above-mentioned solution is uniformly mixed by the high shear agitation 2h of 2000 revs/min of speed, and is made by supersonic oscillations 2h
Mixture A can be sufficiently mixed with vinyltrimethoxysilane, then heat mixture while stirring, until solvent is evaporated completely
Finish, grinding obtains mixture B after powder is dried；
3) above-mentioned adhesive, lubricant, kaolin, barium monoxide, yttria-stabilized zirconia are added in mixture B,
Even stirring, and pre-burning is carried out under air, calcined temperature is 1150 DEG C, and coarse crushing is carried out after raw material natural cooling, must be mixed
Object C；
4) 2 times of water will be added in mixture C, is placed in ball mill and carries out ball milling, being milled to slurry partial size is 4 μm,
Then it is dried in 110 DEG C, obtains mixture D；
5) mixture D is placed in Muffle furnace and is calcined, be warming up to 140 DEG C, then natural cooling cooling is to get the permanent magnetism
Ferrite magnetic material.
Comparative example 6:
A kind of permanent-magnet ferrite magnetic material resistant to high temperature, comprises the following components in parts by weight:
Lubricant includes 30wt%2- imidazolidinone, 45wt% oleic acid and 25wt% molybdenum disulfide；Adhesive includes
30wt% epoxy resin, 70wt% tetrafluoroethylene-Ethylene-acetate ethylene copolymer.
A kind of preparation method of permanent-magnet ferrite magnetic material resistant to high temperature, includes the following steps:
1) above-mentioned iron powder, neodymium powder, boron powder, praseodymium, thulium, lutetium, tantalum, cobalt, copper are mixed, uniform stirring, and add at 1200 DEG C
It is heat-treated to obtain mixture A；
2) it will be added to after the methane blended of vinyltrimethoxysilane and 50 parts by weight in mixture A, form solution,
Above-mentioned solution is uniformly mixed by the high shear agitation 2h of 2000 revs/min of speed, and is made by supersonic oscillations 2h
Mixture A can be sufficiently mixed with vinyltrimethoxysilane, then heat mixture while stirring, until solvent is evaporated completely
Finish, grinding obtains mixture B after powder is dried；
3) above-mentioned adhesive, lubricant, kaolin, barium monoxide are added in mixture B, uniform stirring, and under air
Pre-burning is carried out, calcined temperature is 1150 DEG C, and coarse crushing is carried out after raw material natural cooling, obtains mixture C；
4) 2 times of water will be added in mixture C, is placed in ball mill and carries out ball milling, being milled to slurry partial size is 4 μm,
Then it is dried in 110 DEG C, obtains mixture D；
5) mixture D is placed in Muffle furnace and is calcined, be warming up to 140 DEG C, then natural cooling cooling is to get the permanent magnetism
Ferrite magnetic material.
The performance test results of embodiment and comparative example are listed below:
Table 1
It can be seen that by examples detailed above, Examples 1 to 3 is compared with comparative example 1~6, and permanent-magnet ferrite magnetic material is at 450 DEG C
When permanent-magnet material magnetic property obtained it is higher, can all have substantially compared with the Agglutinate neodymium-iron-boron magnet magnetic property of same class at high temperature
The raising of degree can reach the effect for maintaining high magnetic characteristics in the event of high temperatures.
Although the embodiments of the present invention have been disclosed as above, but its is not only in the description and the implementation listed
With it can be fully applied to various fields suitable for the present invention, for those skilled in the art, can be easily
Realize other modification, therefore without departing from the general concept defined in the claims and the equivalent scope, the present invention is simultaneously unlimited
In specific details.
Claims (10)
1. a kind of permanent-magnet ferrite magnetic material resistant to high temperature, which is characterized in that comprise the following components in parts by weight:
2. permanent-magnet ferrite magnetic material resistant to high temperature according to claim 1, which is characterized in that the rare earth alloy layer
It further include the thulium of 2~4 parts by weight.
3. permanent-magnet ferrite magnetic material resistant to high temperature according to claim 1, which is characterized in that the rare earth alloy layer
It further include the lutetium of 0.5~1 parts by weight.
4. permanent-magnet ferrite magnetic material resistant to high temperature according to claim 1, which is characterized in that the rare earth alloy layer
It further include the tantalum of 4~8 parts by weight.
5. permanent-magnet ferrite magnetic material resistant to high temperature according to claim 1, which is characterized in that the rare earth alloy layer
It further include the cobalt and 0.05~0.1 parts by weight copper of 5~10 parts by weight.
6. permanent-magnet ferrite magnetic material resistant to high temperature according to claim 1, which is characterized in that the rare earth alloy layer
Further include the adhesive of 1~2 parts by weight, the lubricant of 2~4 parts by weight, 0.5~1 parts by weight vinyltrimethoxysilane.
7. permanent-magnet ferrite magnetic material resistant to high temperature according to claim 1, which is characterized in that the rare earth alloy layer
It further include the barium monoxide of 2~4 parts by weight and the yttria-stabilized zirconia of 1~3 parts by weight.
8. permanent-magnet ferrite magnetic material resistant to high temperature according to claim 6, which is characterized in that the lubricant includes
25~30wt%2- imidazolidinone, 45~50wt% oleic acid and 25~30wt% molybdenum disulfide.
9. permanent-magnet ferrite magnetic material resistant to high temperature according to claim 6, which is characterized in that described adhesive includes
25~30wt% epoxy resin, 65~80wt% tetrafluoroethylene-Ethylene-acetate ethylene copolymer.
10. the preparation method of described in any item permanent-magnet ferrite magnetic materials resistant to high temperature according to claim 1~9, special
Sign is, includes the following steps:
1) above-mentioned iron powder, neodymium powder, boron powder, praseodymium, thulium, lutetium, tantalum, cobalt, copper are mixed, uniform stirring, and at 1000~1200 DEG C
Heat to obtain mixture A；
2) it is added in mixture A, is formed after mixing vinyltrimethoxysilane with the organic solvent of 20~50 parts by weight
Above-mentioned solution is uniformly mixed by solution by 0.5~2h of high shear agitation of 500~2000 revs/min of speed, and by super
0.5~2h of sonication enables mixture A to be sufficiently mixed with vinyltrimethoxysilane, then while stirring by mixture
Heating, until solvent volatilization finishes, grinding obtains mixture B after powder is dried；
3) above-mentioned adhesive, lubricant, kaolin, barium monoxide, yttria-stabilized zirconia are added in mixture B, are uniformly stirred
It mixes, and carries out pre-burning under air, calcined temperature is 1100~1150 DEG C, and coarse crushing is carried out after raw material natural cooling, is obtained mixed
Close object C；
4) 1~2 times of water will be added in mixture C, is placed in ball mill and carries out ball milling, being milled to slurry partial size is 2~4 μ
Then m is dried in 100~110 DEG C, obtains mixture D；
5) mixture D is placed in Muffle furnace and is calcined, be warming up to 120~140 DEG C, then natural cooling cooling to get it is described forever
Magnetic ferrites magnetic material.
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|---|---|---|---|---|
| CN110981460A (en) * | 2019-12-16 | 2020-04-10 | 深圳信义磁性材料有限公司 | Preparation method of ferrite magnetic material with high magnetic permeability |
| CN114038674A (en) * | 2021-11-02 | 2022-02-11 | 无锡工艺职业技术学院 | Preparation method of ferrite material |
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