CN1622236A - Method for manufacturing soft magnet silicon-aluminium magnetic powder core - Google Patents
Method for manufacturing soft magnet silicon-aluminium magnetic powder core Download PDFInfo
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- CN1622236A CN1622236A CN 200410061336 CN200410061336A CN1622236A CN 1622236 A CN1622236 A CN 1622236A CN 200410061336 CN200410061336 CN 200410061336 CN 200410061336 A CN200410061336 A CN 200410061336A CN 1622236 A CN1622236 A CN 1622236A
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Abstract
The production process of soft magnetic Fe-Si-Al powder core includes the steps of compounding magnetic powder in different sizes, surface treatment, mixing magnetic powder, insulating agent, adhesive and demolding agent, molding, curing, magnetic heat treatment, soaking and surface coating. The present invention has the advantages of: breaking strength after curing in radial direction of 7-12 kg, less surface stripping, small demolding force, final breaking strength in radial direction of 17-24 kg, no influence of the insulating lacquer on electromagnetic performance and capability of realizing automatic production.
Description
Technical field
The present invention relates to the magnetic bodies technical field, specifically a kind of manufacture method of soft magnet Si-Al magnetic core.
Background technology
At present, Switching Power Supply and UPS develop rapidly, and it needs the magnetic permeability height, the saturation flux density height, during high-frequency work loss little, the magnetic permeability very little magnetic element that descends behind the additional dc bias field, a large amount of general magnetic permeabilitys of ferrocart core low (as μ e=75) that use, and core loss is bigger.The magnetic permeability of Fe-Si-Al magnetic core can reach μ e=125, and saturation flux density is about 1.5T (tesla), and magnetostriction coefficient approaches zero, for obtaining good soft magnet Si-Al magnetic core, adopt the method for a lot of complex process now, big but the shortcoming of sendust is a fragility, toughness is little, the composition compositing range is narrow, and the heat treatment temperature sensitivity is big, and compression molding is peeled off easily, be loose condition (of surface), as directly coiling on iron core, then can be, break with the iron core drawing crack, cause magnetic to worsen.
Summary of the invention
The purpose of this invention is to provide the compression molding easily after treatment of a kind of Fe-Si-Al magnetic, reach raising intensity and other electromagnetic performance through soaking into the coating processing again, thereby reach the manufacture method of the soft magnet Si-Al magnetic core of present highest level.
The manufacture method of soft magnet Si-Al magnetic core of the present invention comprises:
Iron, silicon, aluminium magnetic alloy are known, weight percentages: Si8-13, Al4-7, Fe remainder.
1, joining of granularity of magnet powder:
-100 orders～+ 150 orders 10～15% ,-150 orders～+ 250 orders 40～60% ,-250 orders～+ 320 orders 20～25% ,-320 order remainders
2, magnetic surface treatment:
0.1～1.0% chromic anhydride solution immersion normal temperature is dried after 1～10 minute or fried and does, oven dry is in 100～150 ℃ in baking oven, 1～5 hour, fries and does 100～150 ℃ of the mixer temperature of heater, 1～3 hour.
3, magnetic, insulating compound, bonding agent, release agent, mix.
1. insulating compound-300 order mica powders 0.2～1.0%, or-250 order kaolin 0.2-1.0%;
2. inorganic adhesive: cupric oxide powder+phosphoric acid glue, its percentage by weight are 2.5～4.5, and being diluted to concentration with organic solvent-acetone then is 1～2.5%;
3. remover is a zinc stearate 0.8～2.0%, and built-in mixer mixes;
4. magnetic is a remainder.
4, compression molding:
Briquetting pressure is 18t/cm
2～25t/cm
2, at normal temperatures, extrusion forming in mould.
5, cured:
In baking oven, heat 100～180 ℃, 3～6 hours.
6, magnetic heat treatment:
In tube furnace or kiln, heat 560～800 ℃, more than 30 minutes, cooling fast.
7, soak into processing:
Magnetic element solidifies insulating compound soon at amino, uses acetone diluted, and its ratio is 1: 2～3, and infiltrating time is 10～60 minutes in the size, takes out then about under the 80-200 ℃ of temperature to dry drying time 30 minutes～2 hours.
8, face coat:
Spray epoxy is dried 80～200 ℃, 10 minutes～2 hours.
The amino fast insulating compound that solidifies is: alkyd varnish or three polyoxy ammonia alkyd neulating varnishes or the clear ammonia alkyd impregnating varnish of trimerization.
The advantage of the manufacture method of soft magnet Si-Al magnetic core of the present invention is: 1. with this manufacture method after molded curing is handled, the stretch breaking strength of the ring of magnet footpath direction is that the 7-12kg surface is incrust, is compact state, and the knockout press during mold pressing is less.2. with this manufacture method after soaking into coated and dried, the stretch breaking strength of the ring of magnet footpath direction can reach 17-24kg, the solidification internal stress of the amino fast curable insulating paint of this infiltration usefulness is little, does not influence the electromagnetic performance of magnet.3. use the infiltration coating process of this manufacture method, cost has increase slightly, but can realize automated production, if can realize vacuum infiltration coating, and effect can be better.
Embodiment
Embodiment one:
The manufacture method of soft magnet Si-Al magnetic core of the present invention comprises:
1, joining of granularity of magnet powder:
-100 orders～+ 150 order 15kg ,-150 orders～+ 250 order 60kg ,-250～+ 320 order 20kg ,-320 5kg mix.
2, magnetic surface treatment:
With the 100kg magnetic that mixes with 0.1～0.2% chromic anhydride solution immersion 10 minutes, 1.5 hours dryings of baking in 100 ℃ of baking ovens.
3, magnetic, insulating compound, bonding agent, release agent, mix.
Add-300 purpose mica powder 1.5kg in the 100kg magnetic material, add binding agent 1kg again.Remover 0.8kg places built-in mixer to mix.
4, compression molding:
The magnetic material that contains insulating compound, bonding agent, remover that mixes is put into mould, use 25t/cm
2Pressure compression moulding.
5, cured:
The magnet ring of compression moulding is put into baking oven, under 100 ℃ of temperature, toasted 6 hours,
6, magnetic heat treatment:
The cooled magnet ring of roast is placed on is heated to 560 ℃ in the tube furnace, cooling fast in 1 hour.
7, soak into processing:
Solidify insulating compound and acetone diluted agent in 1: 2～3 ratios amino fast, the size of preparation, magnetic element put into wherein soak 60 minutes after, take out and be placed in the baking oven 2 hours dryings of baking under 80 ℃ of temperature.
8, face coat:
The magnetic element that drying is good is sprayed epoxy resin coating, be placed in the baking oven, the baking test performance took out in 1 hour in 80 ℃ temperature.
Compacting size ￠ 22.90/ ￠ 13.97 * 7.70, performance such as following table:
Line footpath ￠ 0.5mm, voltage 1.0v, 23 circles, dc bias field (Oe) 20Oe
| Frequency f kHz | Inductance value m H | The Q value | Inductance factors A l nH/N |
| ??10 | ????46.5 | ??41.9 | ????87.9 |
| ??50 | ????46.5 | ??52.9 | Than the corresponding μ e=125 of standard value-2.3% (AL=90 nH/N) |
| ??100 | ????46.3 | ??35.7 |
HDC＝200e????????????66％
Consume 50kHz, 500Gs Pw=85mw/cm
Stretch breaking strength radially behind the face coat, 24kg
Embodiment two:
The manufacture method of soft magnet Si-Al magnetic core of the present invention comprises:
1, joining of granularity of magnet powder:
-100 orders～+ 150 order 10kg ,-150 orders～+ 250 order 40kg ,-250～+ 320 order 25kg ,-320 25kg mix.
2, magnetic surface treatment:
The 100kg magnetic that mixes with 0.5% chromic anhydride solution immersion 6 minutes, is toasted 1～3 hour drying in 120 ℃ of baking ovens.
3, magnetic, insulating compound, bonding agent, release agent, mix.
Add-300 purpose mica powder 1kg in the 100kg magnetic material.Add binding agent 1kg again.Remover 1.2kg places built-in mixer to mix.
4, compression molding:
The magnetic material that contains insulating compound, bonding agent, remover that mixes is put into mould, use 22t/cm
2Pressure compression moulding.
5, cured:
The magnet ring of compression moulding is put into baking oven, under 150 ℃ of temperature, toasted 4 hours,
6, magnetic heat treatment:
The cooled magnet ring of roast is placed on is heated to 650 ℃ in the tube furnace, cooling fast in 40 minutes.
7, soak into processing:
In the amino fast insulating compound and the acetone diluted agent admittedly of 1: 2～3 ratios, the size of preparation, magnetic element put into wherein soak 40 minutes after, take out and be placed in the baking oven 1 hour drying of baking under 120 ℃ of temperature.
8, face coat:
The magnetic element that drying is good is sprayed epoxy resin coating, be placed in the baking oven, the baking test performance took out in 40 minutes in 120 ℃ temperature.
Compacting size ￠ 22.96/ ￠ 14.0 * 7.68, performance such as following table 2:
Line footpath ￠ 0.5mm, voltage 1.0v, 23 circles, dc bias field (Oe) 20Oe
| Frequency f kHz | Inductance value m H | The Q value | Inductance factors A l nH/N |
| ??10 | ????44.9 | ??43.7 | ????84.9 |
| ??50 | ????44.9 | ??63.5 | Than the corresponding μ e=125 of standard value-5.7% (AL=90 nH/N) |
| ??100 | ????44.3 | ??45.6 |
HDC＝200e???????82％
Consume 50kHz, 500Gs Pw=76mw/cm
Stretch breaking strength radially behind the face coat, 21kg
Embodiment three:
The manufacture method of soft magnet Si-Al magnetic core of the present invention comprises:
1, joining of granularity of magnet powder:
-100 orders～+ 150 order 12kg ,-150 orders～+ 250 order 50kg ,-250～+ 320 order 23kg ,-320 15kg mix.
2, magnetic surface treatment:
With the 100kg magnetic that mixes with 0.9% chromic anhydride solution immersion 3 minutes, 1 hour drying of baking in 150 ℃ of baking ovens.
3, magnetic, insulating compound, bonding agent, release agent, mix:
Add-300 purpose mica powder 1.2kg in the 100kg magnetic material, add binding agent 1kg again, remover 0.8kg places built-in mixer to mix.
4, compression molding:
The magnetic material that contains insulating compound, bonding agent, remover that mixes is put into mould, use 18t/cm
2Pressure compression moulding.
5, cured:
The magnet ring of compression moulding is put into baking oven, under 180 ℃ of temperature, toasted 3 hours,
6, magnetic heat treatment:
The cooled magnet ring of roast is placed on is heated to 750 ℃ in the tube furnace, cooling fast in 30 minutes.
7, soak into processing:
Solidify insulating compound and acetone diluted agent in 1: 2～3 ratios amino fast, the size of preparation, magnetic element put into wherein soak 20 minutes after, take out and be placed in the baking oven 30 minutes dryings of baking under 180 ℃ of temperature.
8, face coat:
The magnetic element that drying is good is sprayed epoxy resin coating, be placed in the baking oven, the baking test performance took out in 20 minutes in 180 ℃ temperature.Compacting size ￠ 22.90/ ￠ 14.10 * 7.72, performance such as following table: line footpath ￠ 0.5mm, voltage 1.0v, 23 circles, dc bias field (Oe) 20Oe
| Frequency f kHz | Inductance value m H | The Q value | Inductance factors A l nH/N |
| ??10 | ????48.5 | ??40.0 | ????91.7 |
| ??50 | ????48.5 | ??48.0 | Than the corresponding μ e=125 of standard value+1.9% (AL=90 nH/N) |
| ??100 | ????48.0 | ??38.0 |
HDC＝200e??????72％
Consume 50kHz, 500Gs Pw=73mw/cm
Stretch breaking strength radially behind the face coat, 32kg
Claims (5)
1, a kind of manufacture method of soft magnet Si-Al magnetic core, comprise: joining of granularity of magnet powder that------magnetic, insulating compound, bonding agent, release agent mix, and------face coat is characterized in that cured---magnetic heat treatment---: also have between magnetic heat treatment and surface spraying and must soak into processing in compression molding in the magnetic surface treatment.
2, the manufacture method of soft magnet Si-Al magnetic core according to claim 1 is characterized in that: soak into processing and be to soak 10-60 minute in the magnetic element size, take out the back under 100-150 ℃ temperature, dry 30 minutes-2 hours.
3, the manufacture method of soft magnet Si-Al magnetic core according to claim 2 is characterized in that: the size proportioning is: amino fast insulating compound and acetone diluted agent 1: the 2-3 of solidifying.
4, the manufacture method of soft magnet Si-Al magnetic core according to claim 1 is characterized in that: the amino fast insulating compound that solidifies is: alkyd varnish or three polyoxy ammonia alkyd neulating varnishes or the clear ammonia alkyd impregnating varnish of trimerization.
5, the manufacture method of soft magnet Si-Al magnetic core according to claim 1 is characterized in that: bonding agent is that cupric oxide powder and phosphoric acid glue weight ratio are 2.5～4.5.
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| CNB2004100613365A CN100367421C (en) | 2004-12-14 | 2004-12-14 | Method for manufacturing soft magnet silicon-aluminium magnetic powder core |
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|---|---|---|---|
| CNB2004100613365A CN100367421C (en) | 2004-12-14 | 2004-12-14 | Method for manufacturing soft magnet silicon-aluminium magnetic powder core |
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| CN1622236A true CN1622236A (en) | 2005-06-01 |
| CN100367421C CN100367421C (en) | 2008-02-06 |
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| CN100527292C (en) * | 2006-03-01 | 2009-08-12 | 北京七星飞行电子有限公司 | FeSiAl material magnetic core and producing method thereof |
| CN1966186B (en) * | 2006-08-10 | 2010-07-28 | 江西大有科技有限公司 | Alloy soft magnetic powder core production method |
| CN101871071A (en) * | 2010-06-24 | 2010-10-27 | 湖州微控电子有限公司 | Manufacturing method of soft magnet silicon-aluminum alloy magnetic powder core with small amounts of rare earth element cerium or lanthanum |
| CN101118797B (en) * | 2006-08-04 | 2011-06-22 | 安泰科技股份有限公司 | Composite powder, magnetic powder core for magnetic powder and preparation method thereof |
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| CN102623121A (en) * | 2012-04-05 | 2012-08-01 | 天通控股股份有限公司 | Method for manufacturing iron-silicon material and Mu-90 iron-silicon magnetic powder core |
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| CN102699335A (en) * | 2012-06-19 | 2012-10-03 | 浙江科达磁电有限公司 | Preparation method of metal powder for nanocrystalline magnetic core |
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| CN1966186B (en) * | 2006-08-10 | 2010-07-28 | 江西大有科技有限公司 | Alloy soft magnetic powder core production method |
| CN101871071A (en) * | 2010-06-24 | 2010-10-27 | 湖州微控电子有限公司 | Manufacturing method of soft magnet silicon-aluminum alloy magnetic powder core with small amounts of rare earth element cerium or lanthanum |
| CN102360671A (en) * | 2011-08-12 | 2012-02-22 | 天通控股股份有限公司 | Preparation method for mu75 magnetic powder core of ferrosilicon aluminum |
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| CN114429857A (en) * | 2020-10-29 | 2022-05-03 | 东莞市铧美电子有限公司 | Diffusion-proof treatment process for alloy material iron core |
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