CN102982990A - Manufacturing method for ferrum-silicon-aluminum magnetic cores - Google Patents
Manufacturing method for ferrum-silicon-aluminum magnetic cores Download PDFInfo
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- CN102982990A CN102982990A CN2012100554840A CN201210055484A CN102982990A CN 102982990 A CN102982990 A CN 102982990A CN 2012100554840 A CN2012100554840 A CN 2012100554840A CN 201210055484 A CN201210055484 A CN 201210055484A CN 102982990 A CN102982990 A CN 102982990A
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- 238000004519 manufacturing process Methods 0.000 title abstract 4
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 claims abstract description 106
- 229910052742 iron Inorganic materials 0.000 claims abstract description 55
- 239000000203 mixture Substances 0.000 claims abstract description 15
- 239000002253 acid Substances 0.000 claims abstract description 12
- 238000010438 heat treatment Methods 0.000 claims abstract description 10
- 239000000843 powder Substances 0.000 claims description 52
- 238000002360 preparation method Methods 0.000 claims description 20
- 238000003756 stirring Methods 0.000 claims description 15
- CTQNGGLPUBDAKN-UHFFFAOYSA-N O-Xylene Chemical compound CC1=CC=CC=C1C CTQNGGLPUBDAKN-UHFFFAOYSA-N 0.000 claims description 12
- NBIIXXVUZAFLBC-UHFFFAOYSA-N Phosphoric acid Chemical compound OP(O)(O)=O NBIIXXVUZAFLBC-UHFFFAOYSA-N 0.000 claims description 10
- 239000003960 organic solvent Substances 0.000 claims description 9
- 239000007921 spray Substances 0.000 claims description 9
- LFQSCWFLJHTTHZ-UHFFFAOYSA-N Ethanol Chemical compound CCO LFQSCWFLJHTTHZ-UHFFFAOYSA-N 0.000 claims description 8
- 239000007767 bonding agent Substances 0.000 claims description 8
- 238000005469 granulation Methods 0.000 claims description 7
- 230000003179 granulation Effects 0.000 claims description 7
- 239000000314 lubricant Substances 0.000 claims description 7
- 238000003825 pressing Methods 0.000 claims description 7
- 239000004593 Epoxy Substances 0.000 claims description 6
- MUBZPKHOEPUJKR-UHFFFAOYSA-N Oxalic acid Chemical compound OC(=O)C(O)=O MUBZPKHOEPUJKR-UHFFFAOYSA-N 0.000 claims description 6
- 238000001816 cooling Methods 0.000 claims description 6
- 229910000147 aluminium phosphate Inorganic materials 0.000 claims description 5
- 150000003839 salts Chemical class 0.000 claims description 5
- ZOKXTWBITQBERF-UHFFFAOYSA-N Molybdenum Chemical compound [Mo] ZOKXTWBITQBERF-UHFFFAOYSA-N 0.000 claims description 4
- 239000004952 Polyamide Substances 0.000 claims description 4
- 235000021355 Stearic acid Nutrition 0.000 claims description 4
- 239000012298 atmosphere Substances 0.000 claims description 4
- 238000007865 diluting Methods 0.000 claims description 4
- 239000003822 epoxy resin Substances 0.000 claims description 4
- 239000011259 mixed solution Substances 0.000 claims description 4
- 229910052750 molybdenum Inorganic materials 0.000 claims description 4
- 239000011733 molybdenum Substances 0.000 claims description 4
- QIQXTHQIDYTFRH-UHFFFAOYSA-N octadecanoic acid Chemical group CCCCCCCCCCCCCCCCCC(O)=O QIQXTHQIDYTFRH-UHFFFAOYSA-N 0.000 claims description 4
- OQCDKBAXFALNLD-UHFFFAOYSA-N octadecanoic acid Natural products CCCCCCCC(C)CCCCCCCCC(O)=O OQCDKBAXFALNLD-UHFFFAOYSA-N 0.000 claims description 4
- 239000012188 paraffin wax Substances 0.000 claims description 4
- 229920002647 polyamide Polymers 0.000 claims description 4
- 229920000647 polyepoxide Polymers 0.000 claims description 4
- BDERNNFJNOPAEC-UHFFFAOYSA-N propan-1-ol Chemical compound CCCO BDERNNFJNOPAEC-UHFFFAOYSA-N 0.000 claims description 4
- 229920002050 silicone resin Polymers 0.000 claims description 4
- 239000008117 stearic acid Substances 0.000 claims description 4
- 238000010792 warming Methods 0.000 claims description 4
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 claims description 3
- LSNNMFCWUKXFEE-UHFFFAOYSA-N Sulfurous acid Chemical compound OS(O)=O LSNNMFCWUKXFEE-UHFFFAOYSA-N 0.000 claims description 3
- 239000004744 fabric Substances 0.000 claims description 3
- 229910002804 graphite Inorganic materials 0.000 claims description 3
- 239000010439 graphite Substances 0.000 claims description 3
- 238000009413 insulation Methods 0.000 claims description 3
- 239000011261 inert gas Substances 0.000 claims description 2
- 230000014759 maintenance of location Effects 0.000 claims description 2
- 235000006408 oxalic acid Nutrition 0.000 claims description 2
- 229920001568 phenolic resin Polymers 0.000 claims description 2
- 239000005011 phenolic resin Substances 0.000 claims description 2
- 229920005989 resin Polymers 0.000 claims description 2
- 239000011347 resin Substances 0.000 claims description 2
- 239000000243 solution Substances 0.000 claims description 2
- 238000004227 thermal cracking Methods 0.000 claims description 2
- 239000000463 material Substances 0.000 abstract description 13
- 238000000034 method Methods 0.000 abstract description 8
- 230000008901 benefit Effects 0.000 abstract description 3
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- 230000008569 process Effects 0.000 abstract description 3
- 239000006247 magnetic powder Substances 0.000 abstract description 2
- 238000005245 sintering Methods 0.000 abstract description 2
- 230000035699 permeability Effects 0.000 description 20
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N Silicium dioxide Chemical compound O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 description 10
- 235000013339 cereals Nutrition 0.000 description 7
- 238000005303 weighing Methods 0.000 description 7
- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 description 6
- 229910052802 copper Inorganic materials 0.000 description 6
- 239000010949 copper Substances 0.000 description 6
- 238000005259 measurement Methods 0.000 description 6
- 229910052710 silicon Inorganic materials 0.000 description 5
- 239000000377 silicon dioxide Substances 0.000 description 5
- 229910002796 Si–Al Inorganic materials 0.000 description 4
- 239000000956 alloy Substances 0.000 description 4
- 239000000696 magnetic material Substances 0.000 description 4
- 238000007873 sieving Methods 0.000 description 4
- 238000012360 testing method Methods 0.000 description 4
- 229910045601 alloy Inorganic materials 0.000 description 3
- 239000011230 binding agent Substances 0.000 description 3
- 235000013312 flour Nutrition 0.000 description 3
- XOOUIPVCVHRTMJ-UHFFFAOYSA-L zinc stearate Chemical compound [Zn+2].CCCCCCCCCCCCCCCCCC([O-])=O.CCCCCCCCCCCCCCCCCC([O-])=O XOOUIPVCVHRTMJ-UHFFFAOYSA-L 0.000 description 3
- XUIMIQQOPSSXEZ-UHFFFAOYSA-N Silicon Chemical compound [Si] XUIMIQQOPSSXEZ-UHFFFAOYSA-N 0.000 description 2
- 210000000988 bone and bone Anatomy 0.000 description 2
- 238000005336 cracking Methods 0.000 description 2
- 238000005516 engineering process Methods 0.000 description 2
- 239000004922 lacquer Substances 0.000 description 2
- 239000006249 magnetic particle Substances 0.000 description 2
- 239000012299 nitrogen atmosphere Substances 0.000 description 2
- 235000012771 pancakes Nutrition 0.000 description 2
- 238000002161 passivation Methods 0.000 description 2
- 238000012545 processing Methods 0.000 description 2
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- 239000010703 silicon Substances 0.000 description 2
- 229910000976 Electrical steel Inorganic materials 0.000 description 1
- 238000010306 acid treatment Methods 0.000 description 1
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- 235000014113 dietary fatty acids Nutrition 0.000 description 1
- 239000012895 dilution Substances 0.000 description 1
- 238000010790 dilution Methods 0.000 description 1
- 238000007688 edging Methods 0.000 description 1
- 238000004146 energy storage Methods 0.000 description 1
- 238000001125 extrusion Methods 0.000 description 1
- 239000000194 fatty acid Substances 0.000 description 1
- 229930195729 fatty acid Natural products 0.000 description 1
- 150000004665 fatty acids Chemical class 0.000 description 1
- 238000001914 filtration Methods 0.000 description 1
- 230000004907 flux Effects 0.000 description 1
- 239000011785 micronutrient Substances 0.000 description 1
- 235000013369 micronutrients Nutrition 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 229910000889 permalloy Inorganic materials 0.000 description 1
- 150000004965 peroxy acids 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
- 239000011863 silicon-based powder Substances 0.000 description 1
- 238000002791 soaking Methods 0.000 description 1
- 238000005507 spraying Methods 0.000 description 1
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Abstract
The invention relates to a manufacturing method for ferrum-silicon-aluminum magnetic cores. The manufacturing method for the ferrum-silicon-aluminum magnetic cores includes that ferrum-silicon-aluminum magnetic powder is processed through acid and then dry-pressed, so that the power is easy to mold, product density is improved, and meanwhile, the power can achieve high magnetic conductivity after heat treatment. Compared with the prior art, the manufacturing method for the ferrum-silicon-aluminum magnetic cores has the advantages that by means of control of the appending proportion, intensity of pressure of molding, sintering temperature and the like in power allocation, the ferrum-silicon-aluminum magnetic cores with 147 (+/- 8%) of magnetic conductivity are manufactured, and the ferrum-silicon-aluminum magnetic cores are low in iron loss and good in composition performance; process sequences are simple; and raw and auxiliary materials are low in cost.
Description
Technical field
Metallicl magnetic material of the present invention field, specifically, relating to a kind of magnetic permeability is the preparation method of the iron sial magnetic core of 147 (± 8%).
Background technology
The developing history in existing more than 100 year from pure iron, silicon steel to permalloy etc. of soft magnetic material.The novel magnetically soft alloy materials such as nearly two amorphous alloys that successively grow up during the last ten years and nanometer crystal alloy, the institutional framework of soft magnetic material is jumped to amorphous state from crystalline state, develop into crystalline state nanometer from amorphous state again, thereby the research and development of magnetically soft alloy new material and application have been pushed to a new climax.Magnetic core is a kind of element by the soft magnetic material compositions of mixtures, and skeleton, coil etc. are the important component parts of transformer, and it is widely used in the coil and transformer of various electronic equipments.In each field extensive uses such as information, energy storage, filtering; Switching Power Supply and UPS develop rapidly, so that magnetic permeability is high, saturation flux density is high, and high-frequency loss is little, and anti-Dc bias ability is strong, and the magnetic element demand that cost is low is more urgent.The Fe-Si-Al magnetic heart can satisfy above-mentioned requirements, but now the magnetic permeability of iron sial magnetic core is generally below 125, and magnetic permeability is that preparation method's technical difficulty of the 147 Fe-Si-Al magnetic hearts is large, and is high to equipment and technological requirement, domestic just on stream.
At this, the present invention proposes the preparation method that a kind of magnetic permeability is the iron sial magnetic core of 147 (± 8%).
Summary of the invention
The preparation method who the purpose of this invention is to provide a kind of iron sial magnetic core.
Preparation method of the present invention, be with Fe-Si-Al magnetic heart powder through passivation, insulating compound, add binding agent, lubricant is processed so that powder is easier to is dry-pressing formed, improve product density, can also make it after heat treatment can reach high magnetic permeability simultaneously.Product cooperatively interacts by aspects such as powder additive level, briquetting pressure, Technologies for Heating Processing, and control guarantees that product meets u147 (± 8%) magnetic permeability standard-required.
The preparation method of the soft magnet Si-Al magnetic heart of the present invention may further comprise the steps:
1) gets iron sial powder, be that the acid quality of iron sial powder quality 0.5～2 ‰ is the organic solvent diluting of iron sial powder quality 15～50 ‰ with quality, be configured to mixed solution, then at normal temperatures mixed solution is added in the iron sial powder, stir, placed 3～20 minutes; Again tiling, thickness 0.5～1cm;
2) be that the usefulness quality of iron sial powder quality 10～30 ‰ bonding agents is the organic solvent diluting of iron sial powder quality 15～50 ‰ with quality, mix, the bonding agent organic solvent solution is added step 1) powder that obtains, stir, tiling, after 10～60 minutes, wipe the sieve granulation with screen cloth, spread out again and dry;
3) to step 2) to add quality in the powder grain that obtains be the powdered lubricant of iron sial powder quality 0.2～1.0%, stirs, then dry-pressing formed;
4) heat treatment: comprise heating, insulation and cooling three phases, 20～40min is warming up to 650～800 ℃, and the temperature of holding stage is controlled to be 650～800 ℃, and temperature retention time is 40～80min; Cooling stage is cooled to below 100 ℃ with the cooling rate of 〉=10 ℃/min;
5) spray treatment: spray epoxy, oven dry.
Wherein, in step 4) afterwards with step 5) before, can also comprise surperficial chamfered, be about to sintered body at the edging machine flash removed that gets on.
Step 1) in, described iron sial powder is selected this area iron sial powder commonly used, as selecting commercially available iron sial powder product, comprise that composition is Si:9～10%, Al:5～6%, all the other are the iron sial powder (other micronutrient levels are respectively less than 0.1wt%, and other micro-total amounts are not more than 0.5wt% simultaneously) of iron; Powder morphology is pancake or graininess.
Especially, through experimental study, for obtaining desirable compacted density, the grain size proportion of described powder is :+180 orders :≤10%;-180～+ 400 orders: surplus;-400 orders:＞30%, powder morphology is pancake or graininess.
Step 1) in, the consumption of described acid is 1.1～2.0 ‰;
Described acid can be selected oxalic acid, a kind of in phosphoric acid or the sulfurous acid; When calculating addition, by pure acid;
Step 2) in, bonding agent can be selected this area bonding agent commonly used, such as silicone resin, phenolic resins, epoxy resin, one or more in the polyamide etc.; Preferred thermal cracking temperature is greater than 600 ℃ above-mentioned resin;
Described organic solvent can be selected this area organic solvent commonly used, a kind of as in ethanol, propyl alcohol, the dimethylbenzene etc.;
The granulation of described wiping sieve can be selected this area screen cloth commonly used, preferred 60 eye mesh screens;
Step 3) in, the available this area of described stirring method commonly used is carried out, such as mixer etc.;
Described powdered lubricant can be selected organic higher fatty acids and salt thereof, such as stearic acid and salt thereof, paraffin, one or more in inorganic molybdenum bisuphide or the graphite etc.Addition is decided with the type of lubricant, and (stearic acid and salt thereof, the paraffin) of organic in 0.1～1.0% (weight), being advisable 0.1～0.5% of mineral-type, and it is little then invalid to measure, and amount is large then can be so that the magnetic permeability of magnetic powder core descends undercapacity.
Described dry-pressing formedly carry out at normal temperatures, its briquetting pressure is 15～21T/cm
2, with the extrusion forming in mould of powder grain mixture;
Step 4) in, preferred 650～740 ℃ of described heat treated holding temperature;
Described heat treatment can followingly arrange as carrying out at pushed bat kiln: 25-650～800-100 ℃, and the section that wherein heats up 30 minutes, soaking zone 60 minutes, temperature descending section 60 minutes.
Described heat treatment is carried out in inert gas, vacuum or reducing atmosphere;
Step 5) in, described spraying can adopt this area equipment commonly used to carry out, such as spray booth; Described epoxy resin is selected this area epoxy resin coating commonly used.
Described oven dry is following to be carried out: at 80～150 ℃ of insulation 20～100min.
Preparation method of the present invention is particularly suitable for making the iron sial magnetic core that magnetic permeability is 147 (± 8%).Compared with prior art, preparation method of the present invention has obvious advantage: 1, by adding proportion and typed pressure, sintering temperature etc. in the allotment of control powder, producing magnetic permeability is 147 (± 8%) iron sial magnetic core, and goods have low iron loss and the performance that superposes preferably; 2, processing step is simple; 3, the raw and auxiliary material cost is low.
Description of drawings
Fig. 1 is the variation of magnetic magnetic permeability in the sour passivating process in the inventive method.
Embodiment
The present invention is described further below in conjunction with specific embodiment.Specialize such as nothing, the used raw material of the present invention is commercial.
Embodiment 1
Investigate the variation of magnetic magnetic permeability in the sour passivating process.
Get the iron Si powder, its composition is: Si:6.5%, Fe: surplus, C＜300ppm, O＜2500ppm; Its grain size proportion is :+180 order powder account for 10%, and-400 powder materials are 50%, and all the other are-180 orders～+ 400 order powder.
Press iron silica flour material part by weight weighing phosphoric acid, with 25 times of weight alcohol dilutions, join in the iron silica flour material, stir, be 10 minutes standing time, spread out and dry.
Adding the organic silicon high-temperature binding agent prepare (cracking temperature greater than 600 ℃ silicone resin) (1.2%+25 ‰ alcohol) stirs, spreads about 1cm thickness out and dry well again; Before bone dry, with the granulation of sieving of 60 eye mesh screens, again dry again;
Add the zinc stearate of 0.5% content, mix.Dry-pressing formed S270147 product (external diameter: 26.92mm, internal diameter: 14.73mm, height 11.18mm), unit pressure is 18T/cm
2
Heat-treat with the N2 atmosphere protection at pusher furnace subsequently: be warming up to 720 ℃ in 30 minutes, be incubated 1 hour, then cooled in 60 minutes below 100 ℃, take out goods, through chamfered, spray epoxy toasts to get final products.
To make magnetic core by above-mentioned steps without acid-treated iron silica magnetic particle simultaneously.
Magnetic permeability before and after the acid treatment of test iron silica magnetic particle changes, and the results are shown in Figure 1.
Obviously after the peracid passivation, the magnetic permeability of magnetic can descend, the acid consumption is greater than 5 ‰, its magnetic permeability will descend greatly, pass through in addition the research to the addition of bonding agent, powdered lubricant, preparing magnetic permeability is the iron sial magnetic core of 147 (± 8%, 135～159), therefore to set the consumption of acid be that quality is the acid of iron silica flour material quality 0.5～2 ‰ in the present invention, and preferable amount is 1.1～2.0 ‰.
Embodiment 2
Prepare iron sial magnetic core by method of the present invention, specific as follows:
Get iron sial powder, its composition is: Al:5.4%, Si:9.6%, Fe: surplus; Grain size proportion is :+180 order powder account for 8%, and-400 powder materials are 45%, and all the other are-180 orders～+ 400 order powder.
Following auxiliary material all carries out weighing by iron sial powder part by weight.
Weighing 1.5 ‰ phosphoric acid, dilute with 30 ‰ alcohol, join in the iron sial powder, stir, place 15min, spread out and dry, add again the organic silicon high-temperature binding agent prepare (cracking temperature greater than 600 ℃ silicone resin) (1.2%+25 ‰ alcohol) and stir, spread about 1cm thickness out and dry well; Before bone dry, with the granulation of sieving of 60 eye mesh screens, again dry again;
Add the zinc stearate of 0.5% content, mix.Dry-pressing formed S270147 product (external diameter: 26.92mm, internal diameter: 14.73mm, height 11.18mm), unit pressure is 18T/cm
2
Subsequently at pusher furnace N
2Atmosphere protection is heat-treated: be warming up to 720 ℃ in 30 minutes, be incubated 1 hour, then cooled in 60 minutes below 100 ℃, take out goods, through chamfered, spray epoxy toasts to get final products.
The actual product measurement result is as follows:
1, inductance and stack inductance measurement result: WK3260B, 200KHz, 0.05V, 26Ts*1.0mm copper cash, 25 ℃
By L=A
L* N
2Calculate the A of the S270147 product of magnetic permeability 147
LValue is 185nH/N
2, magnetic core L value is 125.06 μ H ± 10 μ H during 26 circle, meets the requirements.
2, power consumption test: 25 ℃, 26Ts*1.0mm copper cash, W3886+CH2335, mw/cm
3
| 100KHz，20mT | 100KHz，50mT | 100KHz，100mT | |
| 1# | 18.83 | 139.9 | 556.53 |
| 2# | 18.71 | 141.11 | 546.12 |
| 3# | 19.12 | 144.24 | 561.73 |
Embodiment 3
Prepare iron sial magnetic core by method of the present invention, specific as follows:
Get iron sial powder, its composition is: Al:5.4%, Si:9.6%, Fe: surplus; Its grain size proportion is :+180 order powder account for 10%, and-400 powder materials are 50%, and all the other are-180 orders～+ 400 order powder.
Following auxiliary material all carries out weighing by iron sial powder part by weight.
Weighing 1.2 ‰ phosphoric acid, dilute with 30 ‰ dimethylbenzene, join in the iron sial powder, stir, place 15min, spread out and dry, adding the polyamide high-temperature agglomerant (1.2%+25 ‰ dimethylbenzene) for preparing stirs again, spread out and dry in the air 5 minutes, when half-dried, with the granulation of sieving of 60 eye mesh screens, again dry again;
Add the zinc stearate of 0.5% content, mix.Moulding S330147A product (external diameter: 33.02mm, internal diameter: 19.94mm, height 7.50mm), unit pressure is 18.5T/cm
2
Subsequently at pusher furnace N
2Heat-treat in the protective atmosphere: be warmed up to 680 ℃ in 30 minutes, be incubated 1 hour, then cool to below 100 ℃ in 1 hour, take out goods, through chamfered, the spray epoxy lacquer, baking gets final products.
The actual product measurement result is as follows:
1, inductance and stack inductance measurement result: WK3260B, 200KHz, 0.05V, 33Ts*1.0mm copper cash, 25 ℃
By L=A
L* N
2Calculate the A of the S330147A product of magnetic permeability 147
LValue is 105nH/N
2, magnetic core L value is 114.35 μ H ± 9.15 μ H during 33 circle, meets the requirements.
2, power consumption test: 25 ℃, 33Ts*1.0mm copper cash, W3886+CH2335, mw/cm
3
| 100KHz，20mT | 100KHz，50mT | 100KHz，100mT | |
| 1# | 16.15 | 121.52 | 497.17 |
| 2# | 16.12 | 118.10 | 505.67 |
| 3# | 16.747 | 122.717 | 520.27 |
Embodiment 4
Prepare iron sial magnetic core by method of the present invention, specific as follows:
Get iron sial powder, its composition is: Al:5.4%, Si:9.6%, Fe: surplus; Its grain size proportion is :+180 order powder account for 10%, and-400 powder materials are 50%, and all the other are-180 orders～+ 400 order powder.
Following auxiliary material all carries out weighing by iron sial powder part by weight.
Weighing 1.8 ‰ sulfurous acid, dilute with 30 ‰ dimethylbenzene, join in the iron sial powder, stir, place 10min, spread out and dry, adding the polyamide high-temperature agglomerant (1.2%+25 ‰ dimethylbenzene) for preparing stirs again, spread out and dry well, when half-dried, with the granulation of sieving of 60 eye mesh screens, again dry again;
Add the molybdenum bisuphide of 0.4% content, mix.Moulding S127147 product (external diameter: 12.70mm, internal diameter: 7.62mm, height 4.75mm), unit pressure is 18.5T/cm
2
Subsequently at pusher furnace N
2Heat-treat in the protective atmosphere: be warmed up to 700 ℃ in 30 minutes, be incubated 1 hour, then cool to below 100 ℃ in 1 hour, take out goods, through chamfered, the spray epoxy lacquer, baking gets final products.
The actual product measurement result is as follows:
1, inductance and stack inductance measurement result: WK3260B, 200KHz, 0.05V, 12Ts*1.0mm copper cash, 25 ℃
By L=A
L* N
2Calculate the S127147 product of magnetic permeability 147, A
LValue is 67nH/N
2, magnetic core L value is 9.648 μ H ± 0.772 μ H during 33 circle, meets the requirements.
2, power consumption test: 25 ℃, 12Ts*1.0mm copper cash, W3886+CH2335, mw/cm
3
| 100KHz，20mT | 100KHz，50mT | 100KHz，100mT | |
| 1# | 16.95 | 130.02 | 536.94 |
| 2# | 17.08 | 124.24 | 546.12 |
| 3# | 17.61 | 131.32 | 568.13 |
Obviously, the iron sial magnetic core of embodiment 2-4 preparation has following advantage: high magnetic permeability, high DC stacked characteristic and low-power consumption.
This specific embodiment only is explanation of the invention; it is not limitation of the present invention; those skilled in the art can make the modification that does not have creative contribution to present embodiment as required after reading this specification, but as long as all are protected in claim scope of the present invention.
Claims (10)
1. the preparation method of an iron sial magnetic core is characterized in that, may further comprise the steps:
1) gets iron sial powder, be that the acid quality of iron sial powder quality 0.5～2 ‰ is the organic solvent diluting of iron sial powder quality 15～50 ‰ with quality, be configured to mixed solution, then at normal temperatures mixed solution is added in the iron sial powder, stir, placed 3～20 minutes; Again tiling, thickness 0.5～1cm;
2) be that the usefulness quality of iron sial powder quality 10～30 ‰ bonding agents is the organic solvent diluting of iron sial powder quality 15～50 ‰ with quality, mix, the bonding agent organic solvent solution is added step 1) powder that obtains, stir, tiling, thickness 0.5～1cm is after 10～60 minutes, wipe the sieve granulation with screen cloth, spread out again and dry;
3) to step 2) to add quality in the powder grain that obtains be the powdered lubricant of iron sial powder quality 0.2～1.0%, stirs, then dry-pressing formed;
4) heat treatment: comprise heating, insulation and cooling three phases, 20～40min is warming up to 650～800 ℃, and the temperature of holding stage is controlled to be 650～800 ℃, and temperature retention time is 40～80min; Cooling stage is cooled to below 100 ℃ with the cooling rate of 〉=10 ℃/min;
5) spray treatment: spray epoxy, oven dry.
2. preparation method according to claim 1 is characterized in that step 1) in, the consumption of described acid is 1.1～2.0 ‰.
3. preparation method according to claim 1 and 2 is characterized in that step 1) in, the grain size proportion of described iron sial powder is :+180 orders :≤10%;-180～+ 400 orders: surplus;-400 orders:＞30%.
4. preparation method according to claim 1 and 2 is characterized in that step 1) in, described acid is oxalic acid, phosphoric acid or sulfurous acid.
5. preparation method according to claim 1 and 2 is characterized in that step 2) in, described bonding agent is silicone resin, phenolic resins, epoxy resin, one or more in the polyamide; Preferred thermal cracking temperature is greater than 600 ℃ resin.
6. preparation method according to claim 1 is characterized in that, described organic solvent is a kind of in ethanol, propyl alcohol, the dimethylbenzene.
7. preparation method according to claim 1 is characterized in that step 3) in, described powdered lubricant is stearic acid and salt thereof, paraffin, one or more in molybdenum bisuphide and the graphite.
8. preparation method according to claim 7 is characterized in that, the addition of described stearic acid and salt thereof and/or paraffin is 0.1～1.0wt%; The addition of molybdenum bisuphide and/or graphite is 0.1～0.5%.
9. preparation method according to claim 1 is characterized in that, described dry-pressing formedly carry out at normal temperatures, and its briquetting pressure is 15～21T/cm
2
10. preparation method according to claim 1 is characterized in that, described heat treatment is carried out in inert gas, vacuum or reducing atmosphere.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201210055484.0A CN102982990B (en) | 2012-03-05 | 2012-03-05 | Manufacturing method for ferrum-silicon-aluminum magnetic cores |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201210055484.0A CN102982990B (en) | 2012-03-05 | 2012-03-05 | Manufacturing method for ferrum-silicon-aluminum magnetic cores |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN102982990A true CN102982990A (en) | 2013-03-20 |
| CN102982990B CN102982990B (en) | 2015-04-22 |
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| CN104392819A (en) * | 2014-05-20 | 2015-03-04 | 深圳顺络电子股份有限公司 | Composite soft magnetic material and preparation method thereof |
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| JP2002043154A (en) * | 2000-07-26 | 2002-02-08 | Daido Steel Co Ltd | Manufacturing for complex sintered dust core |
| WO2004043633A1 (en) * | 2002-11-13 | 2004-05-27 | Humanelecs Co., Ltd. | Fe-Si ALLOY POWDER CORES AND FABRICATION PROCESS THEREOF |
| JP2009259974A (en) * | 2008-04-15 | 2009-11-05 | Tamura Seisakusho Co Ltd | High-strength powder magnetic core, method of manufacturing high-strength powder magnetic core, choke coil, and method of manufacturing the same |
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| CN102013313A (en) * | 2010-11-18 | 2011-04-13 | 惠州市科力磁元有限公司 | Manufacturing method of iron-silicon-aluminum magnetic powder core with high magnetic conductivity |
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| JP2002043154A (en) * | 2000-07-26 | 2002-02-08 | Daido Steel Co Ltd | Manufacturing for complex sintered dust core |
| WO2004043633A1 (en) * | 2002-11-13 | 2004-05-27 | Humanelecs Co., Ltd. | Fe-Si ALLOY POWDER CORES AND FABRICATION PROCESS THEREOF |
| JP2009259974A (en) * | 2008-04-15 | 2009-11-05 | Tamura Seisakusho Co Ltd | High-strength powder magnetic core, method of manufacturing high-strength powder magnetic core, choke coil, and method of manufacturing the same |
| CN101886216A (en) * | 2010-06-24 | 2010-11-17 | 湖州微控电子有限公司 | Preparation method of Fe-6.5% Si alloy magnetic powder core with small amount of P |
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| CN104392819A (en) * | 2014-05-20 | 2015-03-04 | 深圳顺络电子股份有限公司 | Composite soft magnetic material and preparation method thereof |
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