CN105225780A - A kind of high temperature resistant anisotropic bond samarium iron nitrogen magnet and preparation method thereof - Google Patents
A kind of high temperature resistant anisotropic bond samarium iron nitrogen magnet and preparation method thereof Download PDFInfo
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- PRQMIVBGRIUJHV-UHFFFAOYSA-N [N].[Fe].[Sm] Chemical compound [N].[Fe].[Sm] PRQMIVBGRIUJHV-UHFFFAOYSA-N 0.000 title claims abstract description 39
- 238000002360 preparation method Methods 0.000 title abstract description 12
- 230000005291 magnetic effect Effects 0.000 claims abstract description 105
- 239000011230 binding agent Substances 0.000 claims abstract description 30
- 239000004115 Sodium Silicate Substances 0.000 claims abstract description 24
- NTHWMYGWWRZVTN-UHFFFAOYSA-N sodium silicate Chemical compound [Na+].[Na+].[O-][Si]([O-])=O NTHWMYGWWRZVTN-UHFFFAOYSA-N 0.000 claims abstract description 24
- 229910052911 sodium silicate Inorganic materials 0.000 claims abstract description 24
- 239000000463 material Substances 0.000 claims abstract description 10
- 238000000034 method Methods 0.000 claims abstract description 7
- 238000003756 stirring Methods 0.000 claims description 20
- 238000000280 densification Methods 0.000 claims description 15
- CSCPPACGZOOCGX-UHFFFAOYSA-N Acetone Chemical compound CC(C)=O CSCPPACGZOOCGX-UHFFFAOYSA-N 0.000 claims description 14
- 229920006332 epoxy adhesive Polymers 0.000 claims description 12
- LFQSCWFLJHTTHZ-UHFFFAOYSA-N Ethanol Chemical compound CCO LFQSCWFLJHTTHZ-UHFFFAOYSA-N 0.000 claims description 8
- 239000000314 lubricant Substances 0.000 claims description 8
- 239000004094 surface-active agent Substances 0.000 claims description 8
- XEKOWRVHYACXOJ-UHFFFAOYSA-N Ethyl acetate Chemical compound CCOC(C)=O XEKOWRVHYACXOJ-UHFFFAOYSA-N 0.000 claims description 6
- PEDCQBHIVMGVHV-UHFFFAOYSA-N Glycerine Chemical compound OCC(O)CO PEDCQBHIVMGVHV-UHFFFAOYSA-N 0.000 claims description 6
- OKKJLVBELUTLKV-UHFFFAOYSA-N Methanol Chemical compound OC OKKJLVBELUTLKV-UHFFFAOYSA-N 0.000 claims description 6
- 239000000203 mixture Substances 0.000 claims description 5
- 238000003825 pressing Methods 0.000 claims description 5
- 239000007921 spray Substances 0.000 claims description 5
- 238000002156 mixing Methods 0.000 claims description 4
- 239000003960 organic solvent Substances 0.000 claims description 4
- 239000012188 paraffin wax Substances 0.000 claims description 4
- 229920002545 silicone oil Polymers 0.000 claims description 3
- XDLMVUHYZWKMMD-UHFFFAOYSA-N 3-trimethoxysilylpropyl 2-methylprop-2-enoate Chemical compound CO[Si](OC)(OC)CCCOC(=O)C(C)=C XDLMVUHYZWKMMD-UHFFFAOYSA-N 0.000 claims description 2
- 241001502050 Acis Species 0.000 claims description 2
- RWSOTUBLDIXVET-UHFFFAOYSA-N Dihydrogen sulfide Chemical compound S RWSOTUBLDIXVET-UHFFFAOYSA-N 0.000 claims description 2
- XUIMIQQOPSSXEZ-UHFFFAOYSA-N Silicon Chemical compound [Si] XUIMIQQOPSSXEZ-UHFFFAOYSA-N 0.000 claims description 2
- 235000021355 Stearic acid Nutrition 0.000 claims description 2
- RTAQQCXQSZGOHL-UHFFFAOYSA-N Titanium Chemical class [Ti] RTAQQCXQSZGOHL-UHFFFAOYSA-N 0.000 claims description 2
- 150000004645 aluminates Chemical class 0.000 claims description 2
- 239000007864 aqueous solution Substances 0.000 claims description 2
- 150000002148 esters Chemical class 0.000 claims description 2
- 230000008020 evaporation Effects 0.000 claims description 2
- 238000001704 evaporation Methods 0.000 claims description 2
- 239000011261 inert gas Substances 0.000 claims description 2
- QIQXTHQIDYTFRH-UHFFFAOYSA-N octadecanoic acid Chemical compound CCCCCCCCCCCCCCCCCC(O)=O QIQXTHQIDYTFRH-UHFFFAOYSA-N 0.000 claims description 2
- OQCDKBAXFALNLD-UHFFFAOYSA-N octadecanoic acid Natural products CCCCCCCC(C)CCCCCCCCC(O)=O OQCDKBAXFALNLD-UHFFFAOYSA-N 0.000 claims description 2
- 229910052710 silicon Inorganic materials 0.000 claims description 2
- 239000010703 silicon Substances 0.000 claims description 2
- 239000008117 stearic acid Substances 0.000 claims description 2
- 239000003822 epoxy resin Substances 0.000 abstract description 16
- 229920000647 polyepoxide Polymers 0.000 abstract description 16
- 235000019795 sodium metasilicate Nutrition 0.000 abstract description 10
- 239000000696 magnetic material Substances 0.000 abstract description 5
- 238000005260 corrosion Methods 0.000 abstract description 4
- 230000007797 corrosion Effects 0.000 abstract description 4
- 239000000853 adhesive Substances 0.000 abstract description 3
- 230000001070 adhesive effect Effects 0.000 abstract description 3
- 238000011031 large-scale manufacturing process Methods 0.000 abstract description 2
- 238000010521 absorption reaction Methods 0.000 description 3
- 238000012545 processing Methods 0.000 description 3
- 238000012360 testing method Methods 0.000 description 3
- 229910052751 metal Inorganic materials 0.000 description 2
- 239000002184 metal Substances 0.000 description 2
- 239000004593 Epoxy Substances 0.000 description 1
- 239000004677 Nylon Substances 0.000 description 1
- 229910020220 Pb—Sn Inorganic materials 0.000 description 1
- 239000004734 Polyphenylene sulfide Substances 0.000 description 1
- 239000004793 Polystyrene Substances 0.000 description 1
- 229910045601 alloy Inorganic materials 0.000 description 1
- 239000000956 alloy Substances 0.000 description 1
- 229910052782 aluminium Inorganic materials 0.000 description 1
- 230000003487 anti-permeability effect Effects 0.000 description 1
- 238000010923 batch production Methods 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 239000002131 composite material Substances 0.000 description 1
- 238000004132 cross linking Methods 0.000 description 1
- 238000011161 development Methods 0.000 description 1
- 229920001971 elastomer Polymers 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 239000007789 gas Substances 0.000 description 1
- LNEPOXFFQSENCJ-UHFFFAOYSA-N haloperidol Chemical compound C1CC(O)(C=2C=CC(Cl)=CC=2)CCN1CCCC(=O)C1=CC=C(F)C=C1 LNEPOXFFQSENCJ-UHFFFAOYSA-N 0.000 description 1
- 229910000765 intermetallic Inorganic materials 0.000 description 1
- 229910052745 lead Inorganic materials 0.000 description 1
- 230000005389 magnetism Effects 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 239000008204 material by function Substances 0.000 description 1
- 150000002739 metals Chemical class 0.000 description 1
- 229910001172 neodymium magnet Inorganic materials 0.000 description 1
- 229920001778 nylon Polymers 0.000 description 1
- 229920001568 phenolic resin Polymers 0.000 description 1
- 239000005011 phenolic resin Substances 0.000 description 1
- 239000000843 powder Substances 0.000 description 1
- 238000010248 power generation Methods 0.000 description 1
- 229910052761 rare earth metal Inorganic materials 0.000 description 1
- 150000002910 rare earth metals Chemical class 0.000 description 1
- 239000002994 raw material Substances 0.000 description 1
- 238000011160 research Methods 0.000 description 1
- 238000012827 research and development Methods 0.000 description 1
- 239000005060 rubber Substances 0.000 description 1
- 238000003746 solid phase reaction Methods 0.000 description 1
- 238000004381 surface treatment Methods 0.000 description 1
- 239000000725 suspension Substances 0.000 description 1
- 229910052718 tin Inorganic materials 0.000 description 1
- 229910052725 zinc Inorganic materials 0.000 description 1
Abstract
A kind of high temperature resistant anisotropy samarium iron nitrogen bonded permanent magnet and preparation method thereof, belongs to technical field of function materials.The present invention with anisotropy samarium iron nitrogen magnetic for magnetisable material, take sodium metasilicate as main binder, take high-temperature-resistant epoxy resin as additional adhesive, obtained anisotropic bond samarium iron nitrogen magnet not only has higher magnetic property, its temperature tolerance is also largely increased, operating ambient temperature can reach 200 DEG C, and has impermeabilisation, the advantage such as corrosion-resistant.One of the present invention is high temperature resistant anisotropic bond samarium iron nitrogen magnet and preparation method thereof, gained magnet has high magnetic performance, higher serviceability temperature, in implementation process, equipment is simple, easy and simple to handle, cost is lower, be easy to large-scale production, economic worth is high, has very large application prospect in permanent magnetic material field.
Description
Technical field
A kind of high temperature resistant anisotropic bond samarium iron nitrogen magnet of invention and preparation method thereof, belongs to technical field of function materials.
Background technology
Nineteen ninety, the interstitial atom intermetallic compound R that utilized gas-solid phase reaction to synthesize such as HongSun and Coey
2fe
17n
x, cause the extensive concern of magnetics circle, become the focus of domestic and international magnetics circle research immediately.Country " 12 " 863 major project born by Peking University's applied magnetics center, successfully have developed samarium iron nitrogen anisotropic magnet powder production line, and achieves product supply market.
In recent years, the high speed development of wind power generation, electric automobile and magnetic suspension train motor, had higher requirement to magnet serviceability temperature.The Curie temperature of samarium iron nitrogen magnetic is 470 DEG C, and higher than NdFeB magnetic (312 DEG C), therefore, samarium iron nitrogen series permanent magnetic material faces new opportunity to develop with its good resistance to elevated temperatures.Contrast with existing rare-earth magnetic, not only magnetic energy product is high, heat-resisting quantity good but also the cost of material is low for anisotropy samarium iron nitrogen magnetic.The bonding samarium iron nitrogen magnet adopting anisotropy samarium iron nitrogen magnetic to prepare not only has acted on the high energy product of magnetic, can also reduce required magnet volume, adapt to the growth requirement of current electrical equipment miniaturization.Therefore, the research and development of high temperature resistant bonding samarium iron nitrogen magnet have good realistic meaning and application prospect.
Binding agent at first for samarium-ferronitrogen permanent magnet has rubber, nylon, epoxy resin, phenolic resins, PS, PPS, polyimides-composite epoxy resin etc., but due to the shortcoming of binding agent itself, (the Ye Jinwen that all has much room for improvement such as mechanical property, thermal stability of obtained magnet, Liu Ying, Zhang Ran, Chen Mei, Zhu Guoli, promotion is lucky, be coated with an inscription ancient type of banner hoisted on a featherdecked mast. the preparation [J] of isotropism samarium iron nitrogen magnetic and bonded permanent magnet thereof. Rare Metals Materials and engineering, 2007,36 (2): 329-331.).Recent study finds that low-melting-point metal Zn, Al, Pb, Sn and Pb-Sn alloy etc. can be used as binding agent, obtained magnet can be applicable to higher temperature, serious (the Wang Min but the remanent magnetism of magnet declines, Li Hongwei, Yu Dunbo, Li Kuoshe, Luo Yang. the influencing factor [J] of samarium iron nitrogen bonded permanent magnet magnetic property. Metallic Functional Materials, 2010,17 (2): 72-76.).High temperature resistant anisotropic bond samarium iron nitrogen magnet of the present invention take sodium metasilicate as main binder, take high-temperature-resistant epoxy resin as additional adhesive, not only farthest can keep the magnetic property of samarium iron nitrogen magnetic, also effectively can improve the temperature tolerance of magnet, its operating ambient temperature can reach 200 DEG C.
Adopt sodium metasilicate as bonded permanent magnet binding agent, Japan Patent once reported a kind of sodium metasilicate of preparing and mixed the method that rear mold suppresses standby bonded permanent magnet parts with magnetic, obtained bonded permanent magnet parts normally can work in motor, generator etc. slightly hot environment, but there is the large problem of moisture absorption in magnet assembly, need to carry out necessary surface treatment and could use (MinamiTadashi, NakamuraKatsuya, OdakaneMasaaki.Manufactureofbondmagnet.Japan, H01F41/02,1997.).If sodium metasilicate and High temp. epoxy resins are used for bonded permanent magnet simultaneously, then gained magnet can in conjunction with every advantage of epoxy bonded permanent magnet and sodium metasilicate bonded permanent magnet, high temperature resistant, activeness and quietness, impermeabilisation moisture absorption, corrosion-resistant etc. in have unique advantage.Sodium metasilicate has good thermal endurance and intensity, can make up the shortcoming of epoxy resin non-refractory, and improves the strength character of magnet; Meanwhile, epoxy resin infiltrates sodium metasilicate system with molecular scale, forms the inierpeneirating network structure of sodium metasilicate and epoxy resin, will improve anti-permeability performance and the corrosion resistance of magnet well, a step-down of going forward side by side its moisture absorption low after crosslinking curing.
The present invention with anisotropy samarium iron nitrogen magnetic for magnetisable material, take sodium metasilicate as main binder, take high-temperature-resistant epoxy resin as additional adhesive, obtained anisotropic bond samarium iron nitrogen magnet not only has higher magnetic property, its temperature tolerance is also largely increased, operating ambient temperature can reach 200 DEG C, and has impermeabilisation, the advantage such as corrosion-resistant.
Summary of the invention
The object of this invention is to provide a kind of high temperature resistant anisotropic bond samarium iron nitrogen magnet and preparation method thereof, raw material easily obtain, can be mass-produced and cost is low.
One of the present invention is high temperature resistant, and anisotropic bond samarium iron nitrogen magnet is with anisotropy samarium iron nitrogen magnetic and binding agent is main constitutive material, then adds proper amount of surfactant and lubricant and obtained bonded permanent magnet.The mass ratio of each main constitutive material of magnet is respectively: anisotropy samarium iron nitrogen magnetic 90 ~ 96%, sodium silicate binder 3 ~ 6.5%, epoxy adhesive 0.5 ~ 3.3%, surfactant 0.1 ~ 0.3%, lubricant 0.1 ~ 0.3%.
Described sodium silicate binder is sodium silicate aqueous solution, modulus 3.1 ~ 3.4, Baume degrees 39 ~ 41 °.
Described surfactant is preferably from KH-550, KH-560, KH-570, stearic acid, Aluminate, titanate esters.
Described lubricant is preferably from paraffin, glycerol, esters of silicon acis, silicone oil.
The preparation method of a kind of high temperature resistant anisotropic bond samarium iron nitrogen magnet of the present invention is as follows:
The first step, mixed with the surfactant of certain mass by anisotropy samarium iron nitrogen magnetic, stir, must bond magnetic A;
Second step, the bonding magnetic A first step obtained and epoxy adhesive, stir than mixing by certain mass, until magnetic is loose shape, must bond magnetic B;
3rd step, the bonding magnetic B obtained by second step mixes in mass ratio with sodium silicate binder, stirs, until magnetic is loose shape, must bond magnetic C;
4th step, the bonding magnetic C that the 3rd step is obtained and the mix lubricant of certain mass, stir, must bond magnetic D;
5th step, in the bonding magnetic D that the 4th step obtains, spray a little organic solvent to accelerate moisture evaporation in binding agent, be stirred to magnetic loose, must bond magnetic E;
6th step, the appropriate bonding magnetic E the 5th step obtained is placed in mould jolt ramming, first magnetic field orientating in orientating molded forming machine, and then compressing, the demoulding obtains initial magnet base F;
7th step, the initial magnet base F the 6th step obtained is placed in equal pressing equipment, makes its densification, obtains densification magnet base G;
8th step, the densification magnet base G the 7th step obtained is placed in vacuum or inert gas environment solidifies, and obtain high temperature resistant anisotropic bond samarium iron nitrogen magnet, curing temperature is 175 ~ 200 DEG C, time 30 ~ 40min.
Described epoxy adhesive first dissolves by a small amount of acetone diluted before use, instantly namely uses.
Described organic solvent is the mixing of one or more in acetone, methyl alcohol, ethanol, ethyl acetate.
Conventional anisotropic bond samarium iron nitrogen magnet many employings epoxy resin is as binding agent, be easy to batch production, size is accurate, it is the forming method that magnetic material is conventional, but there is the shortcoming that Long-Time Service temperature is lower, generally be no more than 110 DEG C, which has limited the use of bonded permanent magnet in some field.Therefore, develop resistant to elevated temperatures anisotropic bond samarium iron nitrogen magnet, not only have important application prospect in permanent magnetic material field, and there is very large economic worth.
The present invention compared with prior art has following beneficial effect.
One of the present invention is high temperature resistant anisotropic bond samarium iron nitrogen magnet and preparation method thereof, not only there is high magnetic performance, higher serviceability temperature (200 DEG C), simultaneously, the present invention's equipment in implementation process is simple, easy and simple to handle, cost is lower, be easy to large-scale production, economic worth is high.Therefore, the present invention has very large application prospect in permanent magnetic material field.
Embodiment
Below in conjunction with embodiment, the present invention will be further described, but the present invention is not limited to following examples.
Embodiment 1: a kind of high temperature resistant anisotropic bond Sm
2fe
17n
3the preparation method of magnet, carries out according to the following steps.
The first step, by 96g anisotropy Sm
2fe
17n
3magnetic mixes with 0.3gKH-550, stirs, and must bond magnetic A1;
Second step, the bonding magnetic A1 first step obtained mixes with 0.5g epoxy adhesive, stirs, until magnetic is loose shape, must bond magnetic B1;
3rd step, the bonding magnetic B1 obtained by second step and 3g sodium silicate binder (modulus 3.1, Baume degrees 40 °) mix, and stir, until magnetic is loose shape, must bond magnetic C1;
4th step, the bonding magnetic C1 the 3rd step obtained mixes with 0.2g paraffin, stirs, and must bond magnetic D1;
5th step, in the bonding magnetic D1 that the 4th step obtains, spray 5ml acetone, be stirred to magnetic loose, must bond magnetic E1;
6th step, the appropriate bonding magnetic E1 the 5th step obtained is placed in mould jolt ramming, in orientating molded forming machine, first use 10T magnetic field orientating, and then compressing, the demoulding obtains initial magnet base F1;
7th step, the initial magnet base F1 the 6th step obtained is placed in equal pressing equipment, makes its densification, obtains densification magnet base G1;
8th step, the densification magnet base G1 the 7th step obtained is placed in vacuum environment and solidifies, and obtains high temperature resistant anisotropic bond Sm
2fe
17n
3magnet, curing temperature is 175 DEG C, time 40min.
Adopt the processing step that this embodiment is identical, sodium silicate binder is used instead the epoxy adhesive of equal in quality, obtained anisotropic bond Sm
2fe
17n
3magnet 1 " #.Two kinds of anisotropic bond Sm that this embodiment obtains
2fe
17n
3magnet 1# and 1 " the temperature coefficient data of # are as shown in table 1.The anisotropic bond Sm of this embodiment gained
2fe
17n
3magnet 1# and 1 " magnetic property at the room temperature of # and 200 DEG C is as shown in table 2.
Table 1 anisotropic bond Sm
2fe
17n
3magnet 1# and 1 " the magnetic property temperature coefficient (easy axle) of #
Note: bonded permanent magnet 1 " # only uses epoxy resin for binding agent, and its operational environment is no more than 110 DEG C.
Table 2 anisotropic bond Sm
2fe
17n
3magnet 1# and 1 " magnetic property (easy axle) of #
Note: bonded permanent magnet 1 " # only uses epoxy resin for binding agent, cracked when it tests at 200 DEG C, do not have data.
Embodiment 2: a kind of high temperature resistant anisotropic bond Sm
2fe
17n
3the preparation method of magnet, carries out according to the following steps.
The first step, by 93g anisotropy Sm
2fe
17n
3magnetic mixes with 0.2gKH-560, stirs, and must bond magnetic A2;
Second step, the bonding magnetic A2 first step obtained mixes with 1.5g epoxy adhesive, stirs, until magnetic is loose shape, must bond magnetic B2;
3rd step, the bonding magnetic B2 obtained by second step and 5g sodium silicate binder (modulus 3.2, Baume degrees 39 °) mix, and stir, until magnetic is loose shape, must bond magnetic C2;
4th step, the bonding magnetic C2 the 3rd step obtained mixes with 0.3g silicone oil, stirs, and must bond magnetic D2;
5th step, in the bonding magnetic D2 that the 4th step obtains, spray 4ml ethanol, be stirred to magnetic loose, must bond magnetic E2;
6th step, the appropriate bonding magnetic E2 the 5th step obtained is placed in mould jolt ramming, in orientating molded forming machine, first use 10T magnetic field orientating, and then compressing, the demoulding obtains initial magnet base F2;
7th step, the initial magnet base F2 the 6th step obtained is placed in equal pressing equipment, makes its densification, obtains densification magnet base G2;
8th step, the densification magnet base G2 the 7th step obtained is placed in ar gas environment and solidifies, and obtains high temperature resistant anisotropic bond Sm
2fe
17n
3magnet, curing temperature is 188 DEG C, time 35min.
Adopt the processing step that this embodiment is identical, sodium silicate binder is used instead the epoxy adhesive of equal in quality, obtained anisotropic bond Sm
2fe
17n
3magnet 2 " #.Two kinds of anisotropic bond Sm that this embodiment obtains
2fe
17n
3magnet 2# and 2 " the temperature coefficient data of # are as shown in table 3.The anisotropic bond Sm of this embodiment gained
2fe
17n
3magnet 2# and 2 " magnetic property at the room temperature of # and 200 DEG C is as shown in table 4.
Table 3 anisotropic bond Sm
2fe
17n
3magnet 2# and 2 " the magnetic property temperature coefficient (easy axle) of #
Note: bonded permanent magnet 2 " # only uses epoxy resin for binding agent, and its operational environment is no more than 110 DEG C.
Table 4 anisotropic bond Sm
2fe
17n
3magnet 2# and 2 " magnetic property (easy axle) of #
Note: bonded permanent magnet 1 " # only uses epoxy resin for binding agent, cracked when it tests at 200 DEG C, do not have data.
Embodiment 3: a kind of high temperature resistant anisotropic bond Sm
2fe
17n
3the preparation method of magnet, carries out according to the following steps.
The first step, by 90g anisotropy Sm
2fe
17n
3magnetic mixes with 0.1gKH-570, stirs, and must bond magnetic A3;
Second step, the bonding magnetic A3 first step obtained mixes with 3.3g epoxy adhesive, stirs, until magnetic is loose shape, must bond magnetic B3;
3rd step, the bonding magnetic B3 obtained by second step and 6.5g sodium silicate binder (modulus 3.4, Baume degrees 41 °) mix, and stir, until magnetic is loose shape, must bond magnetic C3;
4th step, the bonding magnetic C3 the 3rd step obtained mixes with 0.1g paraffin, stirs, and must bond magnetic D3;
5th step, in the bonding magnetic D3 that the 4th step obtains, spray 5ml acetone, be stirred to magnetic loose, must bond magnetic E3;
6th step, the appropriate bonding magnetic E3 the 5th step obtained is placed in mould jolt ramming, in orientating molded forming machine, first use 10T magnetic field orientating, and then compressing, the demoulding obtains initial magnet base F3;
7th step, the initial magnet base F3 the 6th step obtained is placed in equal pressing equipment, makes its densification, obtains densification magnet base G3;
8th step, the densification magnet base G3 the 7th step obtained is placed in vacuum environment and solidifies, and obtains high temperature resistant anisotropic bond Sm
2fe
17n
3magnet, curing temperature is 200 DEG C, time 30min.
Adopt the processing step that this embodiment is identical, sodium silicate binder is used instead the epoxy adhesive of equal in quality, obtained anisotropic bond Sm
2fe
17n
3magnet 3 " #.Two kinds of anisotropic bond Sm that this embodiment obtains
2fe
17n
3magnet 3# and 3 " the temperature coefficient data of # are as shown in table 5.The anisotropic bond Sm of this embodiment gained
2fe
17n
3magnet 3# and 3 " magnetic property at the room temperature of # and 200 DEG C is as shown in table 6.
Table 5 anisotropic bond Sm
2fe
17n
3magnet 3# and 3 " the magnetic property temperature coefficient (easy axle) of #
Note: bonded permanent magnet 3 " # only uses epoxy resin for binding agent, and its operational environment is no more than 110 DEG C.
Table 6 anisotropic bond Sm
2fe
17n
3magnet 3# and 3 " magnetic property (easy axle) of #
Note: bonded permanent magnet 1 " # only uses epoxy resin for binding agent, cracked when it tests at 200 DEG C, do not have data.
Claims (7)
1. a high temperature resistant anisotropic bond samarium iron nitrogen magnet, is characterized in that, is be main constitutive material with anisotropy samarium iron nitrogen magnetic and binding agent, then adds proper amount of surfactant and lubricant and obtained bonded permanent magnet.The mass ratio of each main constitutive material of magnet is respectively: anisotropy samarium iron nitrogen magnetic 90 ~ 96%, sodium silicate binder 3 ~ 6.5%, epoxy adhesive 0.5 ~ 3.3%, surfactant 0.1 ~ 0.3%, lubricant 0.1 ~ 0.3%.
2., according to the one of claim 1 high temperature resistant anisotropic bond samarium iron nitrogen magnet, it is characterized in that, described sodium silicate binder is sodium silicate aqueous solution, modulus 3.1 ~ 3.4, Baume degrees 39 ~ 41 °.
3. according to the one of claim 1 high temperature resistant anisotropic bond samarium iron nitrogen magnet, it is characterized in that, it is characterized in that, surfactant is preferably from KH-550, KH-560, KH-570, stearic acid, Aluminate, titanate esters.
4. according to the one of claim 1 high temperature resistant anisotropic bond samarium iron nitrogen magnet, it is characterized in that, it is characterized in that, lubricant is preferably from paraffin, glycerol, esters of silicon acis, silicone oil.
5. prepare the method for the high temperature resistant anisotropic bond samarium iron nitrogen magnet of claim 1, it is characterized in that, comprise the following steps:
The first step, mixed with the surfactant of certain mass by anisotropy samarium iron nitrogen magnetic, stir, must bond magnetic A;
Second step, the bonding magnetic A first step obtained and epoxy adhesive, stir than mixing by certain mass, until magnetic is loose shape, must bond magnetic B;
3rd step, the bonding magnetic B obtained by second step mixes in mass ratio with sodium silicate binder, stirs, until magnetic is loose shape, must bond magnetic C;
4th step, the bonding magnetic C that the 3rd step is obtained and the mix lubricant of certain mass, stir, must bond magnetic D;
5th step, in the bonding magnetic D that the 4th step obtains, spray a little organic solvent accelerate moisture evaporation in binding agent, be stirred to magnetic loose, must bond magnetic E;
6th step, the appropriate bonding magnetic E the 5th step obtained is placed in mould jolt ramming, first magnetic field orientating in orientating molded forming machine, and then compressing, the demoulding obtains initial magnet base F;
7th step, the initial magnet base F the 6th step obtained is placed in equal pressing equipment, makes its densification, obtains densification magnet base G;
8th step, the densification magnet base G the 7th step obtained is placed in vacuum or inert gas environment solidifies, and obtain high temperature resistant anisotropic bond samarium iron nitrogen magnet, curing temperature is 175 ~ 200 DEG C, time 30 ~ 40min.
6. according to the method for claim 5, it is characterized in that, described epoxy adhesive first dissolves by acetone diluted before use, instantly namely uses.
7. according to the method for claim 5, it is characterized in that, described organic solvent is the mixing of one or more in acetone, methyl alcohol, ethanol, ethyl acetate.
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112564436A (en) * | 2020-11-26 | 2021-03-26 | 浙江英洛华磁业有限公司 | Method of manufacturing a rotor assembly |
| CN112789701A (en) * | 2018-10-09 | 2021-05-11 | 株式会社Ihi | Method for producing Sm-Fe-N magnet, and motor having Sm-Fe-N magnet |
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| CN101157779A (en) * | 2007-09-27 | 2008-04-09 | 广州金南磁塑有限公司 | Novel rubber magnet and method for making same |
| CN101465188A (en) * | 2008-07-22 | 2009-06-24 | 北矿磁材科技股份有限公司 | Flexible rare-earth cementing magnet and method of manufacturing the same |
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN112789701A (en) * | 2018-10-09 | 2021-05-11 | 株式会社Ihi | Method for producing Sm-Fe-N magnet, and motor having Sm-Fe-N magnet |
| JP7294347B2 (en) | 2018-10-09 | 2023-06-20 | 株式会社Ihi | Manufacturing method of Sm-Fe-N magnet, Sm-Fe-N magnet and motor provided with Sm-Fe-N magnet |
| CN112789701B (en) * | 2018-10-09 | 2023-08-08 | 株式会社Ihi | Method for producing Sm-Fe-N magnet, and motor having Sm-Fe-N magnet |
| CN112564436A (en) * | 2020-11-26 | 2021-03-26 | 浙江英洛华磁业有限公司 | Method of manufacturing a rotor assembly |
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