CN103107013A - Preparation technology of alloy soft magnetic powder cores - Google Patents
Preparation technology of alloy soft magnetic powder cores Download PDFInfo
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- CN103107013A CN103107013A CN2013100185408A CN201310018540A CN103107013A CN 103107013 A CN103107013 A CN 103107013A CN 2013100185408 A CN2013100185408 A CN 2013100185408A CN 201310018540 A CN201310018540 A CN 201310018540A CN 103107013 A CN103107013 A CN 103107013A
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Abstract
The invention relates to a preparation technology of alloy soft magnetic powder cores, in particular to the preparation technology of Fe-based nanocrystalline magnetic powder cores which have good high-frequency characteristics. The preparation technology includes the following steps: mechanically crushing Fe-based nanocrystalline metal ribbons to obtain nanocrystalline metal powder, screening and proportioning the nanocrystalline metal powder and then mixing the nanocrystalline metal powder into powder grains which are composed of first powder and second powder, wherein the first powder by weight, occupies 50%-80% of the powder grains, and passes through -200-270 meshes. The second powder, by weight, occupies 20%-50% of the powder grains, and passes through -270-325 meshes. The mixed nanocrystalline metal powder is subjected to passivation process and insulation bonding cladding process, and then is press-molded into magnetic cores. The molded magnetic cores are subjected to annealing process, and then coating insulation process is carried out on the surfaces of the magnetic cores.
Description
Technical field
The present invention relates to a kind of manufacturing process of alloy soft magnetic powder core, specifically, relate to a kind of manufacturing process with iron based nano crystal powder core of good high frequency characteristics.
Background technology
Powder core be a kind of by soft magnetic powder through after insulation protection, a kind of compound soft magnetic material for preparing by powder metallurgy process.Be widely used in the production of the various electronic devices and components such as communication, the energy, auto industry, household appliances, auto-door controlling and inductor, filter, instrument transformer, inverter.
Amorphous nanocrystalline soft magnetic material is a kind of environmental protection shaped material that immediate development is got up, and is the substitute products that traditional soft magnetic material comprises silicon steel, ferrite and permalloy etc., has all obtained remarkable breakthrough in theory research and Applied research fields.The amorphous nano peritectic alloy is because of advantages such as it have excellent soft magnet performance, with low cost, technique is simple, made outstanding contribution for the tradition transformation of China and new and high technology develop cause rapidly.Towards miniaturization, lightweight future development, nano-crystal soft magnetic alloy highlights its increasing advantage with its high magnetic permeability, low high-frequency loss with than performance characteristics such as high saturated magnetic inductions along with electronic equipment, electronic instrument.The nano-crystal soft magnetic alloy powder core has obtained successful Application in the large electric current of high frequency powerful field, as boost ring and the filter inductance of ups power, filter inductance and energy storage inductor, the oil field high power switching power supply filter inductance etc. of military Switching Power Supply.
But existing metal dust magnetic core only can be used in lower frequency, and it is applied in higher frequency and is restricted.Simultaneously, in routine techniques, be formed with insulating barrier between powder particle when the preparation soft magnetic core, thereby air gap is evenly distributed.Thus, the vortex flow loss that sharply increases in the time of can making high frequency drops to minimum, and can keep on the whole air gap, thereby can realize having the overlapping characteristic of splendid direct current when larger electric current.But when higher frequency, routine techniques has permeability and reduces serious problem.
Summary of the invention
For addressing the above problem, the object of the present invention is to provide a kind of preparation technology who prepares the nanocrystalline magnetic core with good high frequency characteristics.
The preparation technology of a kind of alloy soft magnetic powder core provided by the invention comprises the steps:
The iron based nano crystal metal sheet band is carried out mechanical crushing process, to obtain the nanocrystalline metal powder;
Described nanocrystalline metal powder is sieved and proportioning, and then being mixed into by weight content is that 50 ~ 80% the first powder that passes through-200 ~+270 sieve meshes and weight content are the powder particle of 20 ~ 50% the second powder constituent that passes through-270 ~+325 sieve meshes;
The described nanocrystalline metal powder that is mixed into is carried out passivation and insulation adhesive coating processing, and then compressing is magnetic core;
Magnetic core to described moulding carries out annealing in process, then the magnetic core surface is sprayed insulation processing.
Optimize, described passivation and insulation adhesive coat to be processed, and comprises the steps Passivation Treatment: the nanocrystalline metal powder is mixed with the phosphoric acid liquid of 1 ~ 5wt%, stir until dry; Insulation adhesive coats: will mix with the glass powder with low melting point of 5-15wt% and the epoxy resin of 3-10wt% through the nanocrystalline metal powder of Passivation Treatment, stir until dry.
Optimize, described compressing pressure adopts 15 ~ 27t/cm
2
Optimize, described annealing in process was carried out 1 ~ 4 hour at 450 ~ 600 ℃.
Optimize, it is inorganic agent that described spraying insulation processing adopts epoxy resin.
Preparation technology provided by the invention has following beneficial effect: 1, and by powder sieving and proportioning, powder core has obtained optimum physical characteristic and composition homogeneity, and has stable high frequency characteristics; 2, by Passivation Treatment and the insulating wrapped of powder, obtained to have the nanocrystalline metal powder of the high frequency magnetic permeability of the eddy current loss of minimizing and Geng Gao; 3, by compressing and annealing in process, obtained the alloy soft magnetic powder core of even tissue, high strength, high-compactness and high frequency magnetic permeability.4, by spraying insulation processing, corrosion resistance and the service time of improving soft magnetic-powder core.
Embodiment
The below describes the technique that preparation has the nanocrystalline magnetic core of good high frequency characteristics according to the preferred embodiment of the present invention.It comprises the steps:
Nanocrystalline strip is pulverized, utilized disintegrating machine mainly to pulverize through thick broken going on foot with thin broken two, to obtain the nanocrystalline metal powder;
Described nanocrystalline metal powder is sieved and proportioning, thus powder being divided into can be by the powder and the powder that can pass through-270 ~+325 sieve meshes of-200 ~+270 sieve meshes, then they are mixed into powder particle, it is to be that 50 ~ 80% the powder that passes through-200 ~+270 sieve meshes and weight content are 20 ~ 50% the powder constituent that passes through-270 ~+325 sieve meshes by weight content that the proportioning of this powder particle distributes.
It is that the powder particle that can obtain optimum physical characteristic and composition homogeneity forms that above-mentioned powder particle distributes.
The described nanocrystalline metal powder that is mixed into is carried out passivation and insulation adhesive coating processing, Passivation Treatment: the nanocrystalline metal powder that proportioning is good is poured in mixer, after mixing, the phosphoric acid treatment fluid that plays 1 ~ 5wt% of passivation effect is joined in the nanocrystalline metal powder, mix, at the uniform velocity stir until dry; Passivation and insulating wrapped are processed described mass fraction and referred to: the quality of described phosphoric acid, glass powder with low melting point, epoxy resin accounts for respectively the mark of nanocrystalline metal powder quality.
Insulating wrapped: will mix with the 5-15wt% glass powder with low melting point that plays the insulation adhesive effect and 3-10wt% epoxy resin through Passivation Treatment, dried nanocrystalline metal powder, and at the uniform velocity stir until dry.
Adopt pressure 15 ~ 27t/cm
2Nanocrystalline metal powder particle after above-mentioned insulating wrapped is pressed, forms toroidal core.Good compressing technique can guarantee that the powder core has higher intensity and high density, thereby guarantees that powder core has good performance.The pressure of die mould is by affecting the density of powder core and the air gap between powder particle, and the performance of powder core is exerted an influence.
Magnetic core to described moulding carries out annealing in process, namely carries out the heat treatment of 1 ~ 4 hour under 450 ~ 600 ℃.The nanocrystalline metal powder can produce a large amount of residual stresss through high-pressure molding at the powder core inner, therefore, in order to improve magnetic property, must adopt suitable stress relief annealing technique to come the residual stress of uniform formation and elimination or reduction powder core after the moulding of powder core.
After annealing in process, the magnetic core surface is sprayed insulation processing.Employing epoxy resin is inorganic agent, and it is uniformly sprayed at the nanocrystalline magnetic wicking surface, can effectively prevent aging and corrosion, corrosion resistance and the service time of improving soft magnetic-powder core.
Further illustrate the present invention below by embodiment.The iron based nano crystal metal sheet band that embodiments of the invention adopt utilizes single roller utmost point cold process to make, and its composition is Fe
73.5Cu
1Nb
3Si
13.5B
9, thickness is 26～37um, bandwidth is 8-40mm; The powder core specification that embodiments of the invention make adopts Φ 47.2 * 24 * 18(mm).
The present invention has measured the high frequency characteristics of each embodiment and Comparative Examples: use accurate LCR measuring instrument to measure its inductance, then according to L=(0.4 π μ N
2A * 10
-2)/
lDerive magnetic permeability, wherein N represents the number of turns, and A represents the sectional area of magnetic core,
lRepresent the average length of magnetic circuit, measuring condition is: alternating voltage is 1V, and frequency is 1MHz, primary turns 30 circles, secondary 3 circles.Measure the variation that magnetic permeability raises with frequency, measuring condition is: alternating voltage is 1V, and frequency is 100KHz～1MHz, primary turns 30 circles, secondary 3 circles.
Embodiment 1
The preparation technology of the alloy soft magnetic powder core of the present embodiment comprises the steps:
Utilize disintegrating machine mainly to pulverize through thick broken going on foot with thin broken two to the iron based nano crystal metal sheet band that utilizes single roller utmost point cold process to make, to obtain the nanocrystalline metal powder;
Described nanocrystalline metal powder is sieved and proportioning, thus powder being divided into can be by the powder and the powder that can pass through-270 ~+325 sieve meshes of-200 ~+270 sieve meshes, then they are mixed into powder particle, it is to be that 80% the powder that passes through-200 ~+270 sieve meshes and weight content are 20% the powder constituent that passes through-270 ~+325 sieve meshes by weight content that the proportioning of this powder particle distributes.
The described nanocrystalline metal powder that is mixed into is carried out passivation and insulation adhesive coating processing, Passivation Treatment: the nanocrystalline metal powder that proportioning is good is poured in mixer, after mixing, the phosphoric acid liquid that plays the 3wt% of passivation effect is joined in the nanocrystalline metal powder, mix, at the uniform velocity stir until dry; Insulation adhesive coats: will mix with the 10wt% glass powder with low melting point that plays the insulation adhesive effect and 6% epoxy resin solution through Passivation Treatment, dried nanocrystalline metal powder, and at the uniform velocity stir until dry.
Adopt 21t/cm
2Pressure above-mentioned nanocrystalline metal powder particle is pressed, form toroidal core.Magnetic core to described moulding carries out annealing in process, namely carries out the heat treatment of 3 hours under 500 ℃.After annealing in process, the magnetic core surface is sprayed insulation processing.Employing epoxy resin is inorganic agent, and it is uniformly sprayed at the nanocrystalline magnetic wicking surface.
The surface composition situation of the powder core that observation makes, the magnetic property of the powder core that mensuration makes is recorded in magnetic permeability in table 1.
Embodiment 2
The difference of the present embodiment and embodiment 1 is: in the nanocrystalline metal powder particle that is mixed into of screening proportioning, the weight content by-200 ~+270 sieve mesh powder is 50%, and the weight content by-270 ~+325 sieve mesh powder is 50%.
The surface composition situation of the powder core that observation makes, the magnetic property of the powder core that mensuration makes is recorded in magnetic permeability in table 1.
Embodiment 3
The difference of the present embodiment and embodiment 1 is: in the nanocrystalline metal powder particle that is mixed into of screening proportioning, the weight content by-200 ~+270 sieve mesh powder is 65%, and the weight content by-270 ~+325 sieve mesh powder is 35%.
The surface composition situation of the powder core that observation makes, the magnetic property of the powder core that mensuration makes is recorded in magnetic permeability in table 1.
Comparative Examples 1
The technique of the preparation alloy soft magnetic powder core of this Comparative Examples comprises the steps:
Utilize disintegrating machine mainly to pulverize through thick broken going on foot with thin broken two to the iron based nano crystal metal sheet band that utilizes single roller utmost point cold process to make, to obtain the nanocrystalline metal powder;
Described nanocrystalline metal powder is sieved and proportioning, thus powder being divided into can be by the powder and the powder that can pass through-270 ~+325 sieve meshes of-200 ~+270 sieve meshes, then they are mixed into powder particle, it is to be that 40% the powder that passes through-200 ~+270 sieve meshes and weight content are 60% the powder constituent that passes through-270 ~+325 sieve meshes by weight content that the proportioning of this powder particle distributes.
The described nanocrystalline metal powder that is mixed into is carried out passivation and insulation adhesive coating processing, Passivation Treatment: the nanocrystalline metal powder that proportioning is good is poured in mixer, after mixing, the phosphoric acid liquid that plays the 3wt% of passivation effect is joined in the nanocrystalline metal powder, mix, at the uniform velocity stir until dry; Insulation adhesive coats: will mix with the 10wt% glass powder with low melting point that plays the insulation adhesive effect and 6% epoxy resin solution through Passivation Treatment, dried nanocrystalline metal powder, and at the uniform velocity stir until dry.
Adopt 21t/cm
2Pressure above-mentioned nanocrystalline metal powder particle is pressed, form toroidal core.Magnetic core to described moulding carries out annealing in process, namely carries out the heat treatment of 3 hours under 500 ℃.After annealing in process, the magnetic core surface is sprayed insulation processing.Employing epoxy resin is inorganic agent, and it is uniformly sprayed at the nanocrystalline magnetic wicking surface.
The surface composition situation of the powder core that observation makes, the magnetic property of the powder core that mensuration makes is recorded in magnetic permeability in table 1.
Comparative Examples 2
The difference of this Comparative Examples and Comparative Examples 1 is: in the nanocrystalline metal powder particle that is mixed into through the screening proportioning, the weight content by-200 ~+270 sieve mesh powder is 100%, and the weight content by-270 ~+325 order powder is 0%.
The surface composition situation of the powder core that observation makes, the magnetic property of the powder core that mensuration makes is recorded in magnetic permeability in table 1.
Table 1
Contrast by upper table as can be known, only have Comparative Examples 2 phenomenon of soft magnetic-powder core skin breakage to occur, except Comparative Examples 2, the high-gradient magnetism of embodiment can all be better than Comparative Examples, and in 100KHz～1MHz scope, magnetic permeability is less with the rising decline of frequency, remains in 2%, therefore the distribution of the powder particle of technique of the present invention is can obtain the powder particle of optimum physical characteristic and composition homogeneity to form, and can access stable high frequency characteristics.
Embodiment 4
The difference of the present embodiment and embodiment 1 is: when the nanocrystalline metal powder that is mixed into was carried out nanocrystalline Passivation Treatment, the mass fraction that the phosphoric acid of described passivation effect adds was 1%.
The high frequency magnetic permeability of the powder core that mensuration makes is recorded in table 2.
Embodiment 5
The difference of the present embodiment and embodiment 1 is: when the nanocrystalline metal powder that is mixed into was carried out nanocrystalline Passivation Treatment, the weight fraction that the phosphoric acid of described passivation effect adds was 5%.
The high frequency magnetic permeability of the powder core that mensuration makes is recorded in table 2.
Comparative Examples 3
The preparation technology of the alloy soft magnetic powder core of this Comparative Examples comprises the steps:
Utilize disintegrating machine mainly to pulverize through thick broken going on foot with thin broken two to the iron based nano crystal metal sheet band that utilizes single roller utmost point cold process to make, to obtain the nanocrystalline metal powder;
Described nanocrystalline metal powder is sieved and proportioning, thus powder being divided into can be by the powder and the powder that can pass through-270 ~+325 sieve meshes of-200 ~+270 sieve meshes, then they are mixed into powder particle, it is to be that 80% the powder that passes through-200 ~+270 sieve meshes and weight content are 20% the powder constituent that passes through-270 ~+325 sieve meshes by weight content that the proportioning of this powder particle distributes.
The described nanocrystalline metal powder that is mixed into is carried out passivation and insulation adhesive coating processing, Passivation Treatment: the nanocrystalline metal powder that proportioning is good is poured in mixer, after mixing, the phosphoric acid liquid that plays the 8wt% of passivation effect is joined in the nanocrystalline metal powder, mix, at the uniform velocity stir until dry; Insulation adhesive coats: will mix with the 10wt% glass powder with low melting point that plays the insulation adhesive effect and 6% epoxy resin solution through Passivation Treatment, dried nanocrystalline metal powder, and at the uniform velocity stir until dry.
Adopt 21t/cm
2Pressure above-mentioned nanocrystalline metal powder particle is pressed, form toroidal core.Magnetic core to described moulding carries out annealing in process, namely carries out the heat treatment of 3 hours under 500 ℃.After annealing in process, the magnetic core surface is sprayed insulation processing.Employing epoxy resin is inorganic agent, and it is uniformly sprayed at the nanocrystalline magnetic wicking surface.
The high frequency magnetic permeability of the powder core that mensuration makes is recorded in table 2.
Table 2
Contrast by upper table as can be known, the high frequency magnetic permeability of embodiments of the invention is better than Comparative Examples, therefore technique of the present invention can be added on passivator on the nanocrystalline metal powder uniformly and effectively, is conducive to improve the high frequency magnetic permeability of powder core.
Embodiment 6
The difference of the present embodiment and embodiment 1 is: when process Passivation Treatment, dried nanocrystalline metal powder were carried out the insulation adhesive coating, the weight content that described glass powder with low melting point adds was 5%, and the addition of epoxy resin is 3%.
The high frequency magnetic permeability of the powder core that mensuration makes is recorded in table 3.
Embodiment 7
The difference of the present embodiment and embodiment 1 is: to the process Passivation Treatment, when dried nanocrystalline metal powder carries out insulating wrapped, the weight content that described glass powder with low melting point adds is 15%, and the addition of epoxy resin is 7%.
The high frequency magnetic permeability of the powder core that mensuration makes is recorded in table 3.
Comparative Examples 4
The technique of the preparation alloy soft magnetic powder core of this Comparative Examples comprises the steps:
Utilize disintegrating machine mainly to pulverize through thick broken going on foot with thin broken two to the iron based nano crystal metal sheet band that utilizes single roller utmost point cold process to make, to obtain the nanocrystalline metal powder;
Described nanocrystalline metal powder is sieved and proportioning, thus powder being divided into can be by the powder and the powder that can pass through-270 ~+325 sieve meshes of-200 ~+270 sieve meshes, then they are mixed into powder particle, it is to be that 80% the powder that passes through-200 ~+270 sieve meshes and weight content are 20% the powder constituent that passes through-270 ~+325 sieve meshes by weight content that the proportioning of this powder particle distributes.
The described nanocrystalline metal powder that is mixed into is carried out passivation and insulation adhesive coating processing, Passivation Treatment: the nanocrystalline metal powder that proportioning is good is poured in mixer, after mixing, the phosphoric acid liquid that plays the 3wt% of passivation effect is joined in the nanocrystalline metal powder, mix, at the uniform velocity stir until dry; Insulation adhesive coats: will mix with the 1wt% glass powder with low melting point that plays the insulation adhesive effect and 1wt% epoxy resin solution through Passivation Treatment, dried nanocrystalline metal powder, and at the uniform velocity stir until dry.
Adopt 21t/cm
2Pressure above-mentioned nanocrystalline metal powder particle is pressed, form toroidal core.Magnetic core to described moulding carries out annealing in process, namely carries out the heat treatment of 3 hours under 500 ℃.After annealing in process, the magnetic core surface is sprayed insulation processing.Employing epoxy resin is inorganic agent, and it is uniformly sprayed at the nanocrystalline magnetic wicking surface.
The high frequency magnetic permeability of the powder core that mensuration makes is recorded in table 3.
Comparative Examples 5
This Comparative Examples is with the difference of Comparative Examples 4: when process Passivation Treatment, dried nanocrystalline metal powder were carried out the insulation adhesive coating, the addition of glass powder with low melting point was 20wt%, and the addition of epoxy resin is 12%.
The high-gradient magnetism energy of the powder core that mensuration makes is recorded in table 3.
Table 3
Contrast by upper table as can be known, the high frequency magnetic permeability of embodiments of the invention is higher than Comparative Examples, embodiments of the invention are better than Comparative Examples.
Embodiment 8
The difference of the present embodiment and embodiment 1 is: when the nanocrystalline metal powder particle is pressed, pressure adopts 15t/cm
2
The high frequency magnetic permeability of the powder core that mensuration makes is recorded in table 4.
Embodiment 9
The difference of the present embodiment and embodiment 1 is: when the nanocrystalline metal powder particle is pressed, pressure adopts 27t/cm
2
The high frequency magnetic permeability of the powder core that mensuration makes is recorded in table 4.
Comparative Examples 6
The preparation technology of the alloy soft magnetic powder core of this Comparative Examples comprises the steps:
Utilize disintegrating machine mainly to pulverize through thick broken going on foot with thin broken two to the iron based nano crystal metal sheet band that utilizes single roller utmost point cold process to make, to obtain the nanocrystalline metal powder;
Described nanocrystalline metal powder is sieved and proportioning, thus powder being divided into can be by the powder and the powder that can pass through-270 ~+325 sieve meshes of-200 ~+270 sieve meshes, then they are mixed into powder particle, it is to be that 80% the powder that passes through-200 ~+270 sieve meshes and weight content are 20% the powder constituent that passes through-270 ~+325 sieve meshes by weight content that the proportioning of this powder particle distributes.
The described nanocrystalline metal powder that is mixed into is carried out passivation and insulation adhesive coating processing, Passivation Treatment: the nanocrystalline metal powder that proportioning is good is poured in mixer, after mixing, the phosphoric acid liquid that plays the 3wt% of passivation effect is joined in the nanocrystalline metal powder, mix, at the uniform velocity stir until dry; Insulation adhesive coats: will mix with the 10wt% glass powder with low melting point that plays the insulation adhesive effect and 6% epoxy resin solution through Passivation Treatment, dried nanocrystalline metal powder, and at the uniform velocity stir until dry.
Adopt 10t/cm
2Pressure above-mentioned nanocrystalline metal powder particle is pressed, form toroidal core.Magnetic core to described moulding carries out annealing in process, namely carries out the heat treatment of 3 hours under 500 ℃.After annealing in process, the magnetic core surface is sprayed insulation processing.Employing epoxy resin is inorganic agent, and it is uniformly sprayed at the nanocrystalline magnetic wicking surface.
The high frequency magnetic permeability of the powder core that mensuration makes is recorded in table 4.
Comparative Examples 7
This Comparative Examples is with the difference of Comparative Examples 9: when the nanocrystalline metal powder particle is pressed, pressure adopts 30t/cm
2
The magnetic property of the powder core that mensuration makes is recorded in magnetic permeability in table 4.
Table 4
Contrast by upper table as can be known, the high frequency magnetic permeability of embodiments of the invention is higher than Comparative Examples, embodiments of the invention are better than Comparative Examples.
Embodiment 10
The difference of the present embodiment and embodiment 1 is: when the magnetic core of moulding is carried out annealing in process, adopt 600 ℃ and carried out 2 hours.
The high frequency magnetic permeability of the powder core that mensuration makes is recorded in table 5.
Comparative Examples 8
The preparation technology of the alloy soft magnetic powder core of this Comparative Examples comprises the steps:
Utilize disintegrating machine mainly to pulverize through thick broken going on foot with thin broken two to the iron based nano crystal metal sheet band that utilizes single roller utmost point cold process to make, to obtain the nanocrystalline metal powder;
Described nanocrystalline metal powder is sieved and proportioning, thus powder being divided into can be by the powder and the powder that can pass through-270 ~+325 sieve meshes of-200 ~+270 sieve meshes, then they are mixed into powder particle, it is to be that 80% the powder that passes through-200 ~+270 sieve meshes and weight content are 20% the powder constituent that passes through-270 ~+325 sieve meshes by weight content that the proportioning of this powder particle distributes.
The described nanocrystalline metal powder that is mixed into is carried out passivation and insulation adhesive coating processing, Passivation Treatment: the nanocrystalline metal powder that proportioning is good is poured in mixer, after mixing, the phosphoric acid liquid that plays the 3wt% of passivation effect is joined in the nanocrystalline metal powder, mix, at the uniform velocity stir until dry; Insulation adhesive coats: will mix with the 10wt% glass powder with low melting point that plays the insulation adhesive effect and 6% epoxy resin solution through Passivation Treatment, dried nanocrystalline metal powder, and at the uniform velocity stir until dry.
Adopt 21t/cm
2Pressure above-mentioned nanocrystalline metal powder particle is pressed, form toroidal core.Magnetic core to described moulding carries out annealing in process, namely carries out the heat treatment of 5 hours under 350 ℃.After annealing in process, the magnetic core surface is sprayed insulation processing.Employing epoxy resin is inorganic agent, and it is uniformly sprayed at the nanocrystalline magnetic wicking surface.
The high frequency magnetic permeability of the powder core that mensuration makes is recorded in table 5.
Comparative Examples 9
The difference of this Comparative Examples and Comparative Examples 11 is: when the magnetic core of moulding is carried out annealing in process, adopt 700 ℃ and carry out 1h.
The high frequency magnetic permeability of the powder core that mensuration makes is recorded in table 5.
Table 5
Contrast by upper table as can be known, the high frequency magnetic permeability of embodiments of the invention is higher than Comparative Examples, embodiments of the invention are better than Comparative Examples.
Claims (5)
1. the preparation technology of an alloy soft magnetic powder core, is characterized in that: comprise the steps:
The iron based nano crystal metal sheet band is carried out mechanical crushing process, to obtain the nanocrystalline metal powder;
Described nanocrystalline metal powder is sieved and proportioning, and then being mixed into by weight content is that 50 ~ 80% the first powder that passes through-200 ~+270 sieve meshes and weight content are the powder particle of 20 ~ 50% the second powder constituent that passes through-270 ~+325 sieve meshes;
The described nanocrystalline metal powder that is mixed into is carried out passivation and insulation adhesive coating processing, and then compressing is magnetic core;
Magnetic core to described moulding carries out annealing in process, then the magnetic core surface is sprayed insulation processing.
2. the preparation technology of a kind of alloy soft magnetic powder core as claimed in claim 1 is characterized in that: described passivation and insulation adhesive coat to be processed, and comprises the steps Passivation Treatment: the nanocrystalline metal powder is mixed with the phosphoric acid liquid of 1 ~ 5wt%, and stirring is until drying; Insulation adhesive coats: will mix with the glass powder with low melting point of 5-15wt% and the epoxy resin of 3-10wt% through the nanocrystalline metal powder of Passivation Treatment, stir until dry.
3. the preparation technology of a kind of alloy soft magnetic powder core as claimed in claim 1, is characterized in that: described compressing pressure employing 15 ~ 27t/cm
2
4. the preparation technology of a kind of alloy soft magnetic powder core as claimed in claim 1, it is characterized in that: described annealing in process was carried out 1 ~ 4 hour at 450 ~ 600 ℃.
5. as the preparation technology of the described any alloy soft magnetic powder core of claim 1～4, it is characterized in that: it is inorganic agent that described spraying insulation processing adopts epoxy resin.
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| CN103680795A (en) * | 2013-12-06 | 2014-03-26 | 青岛云路新能源科技有限公司 | Method for preparing amorphous combined magnetic powder core |
| CN103680795B (en) * | 2013-12-06 | 2016-08-17 | 青岛云路先进材料技术有限公司 | A kind of preparation method of amorphous combination powder core |
| CN103730224A (en) * | 2013-12-27 | 2014-04-16 | 青岛云路新能源科技有限公司 | Preparation method for iron-based amorphous magnetic powder core with ultrahigh magnetic conductivity |
| CN103730224B (en) * | 2013-12-27 | 2016-07-06 | 青岛云路先进材料技术有限公司 | The preparation method with the Fe-based amorphous powder core of superhigh magnetic conductivity |
| CN104036907A (en) * | 2014-06-05 | 2014-09-10 | 浙江大学 | Method for preparing soft magnetic metal composite via warm compaction |
| CN104923792A (en) * | 2015-07-07 | 2015-09-23 | 北京科汇粉末冶金厂 | Electromagnetic part and manufacturing method thereof |
| CN108538568A (en) * | 2018-06-11 | 2018-09-14 | 彭晓领 | A kind of thermal deformation interface scattering preparation of soft-magnetic composite material |
| CN108538568B (en) * | 2018-06-11 | 2020-07-31 | 中国计量大学 | Thermal deformation interface diffusion preparation method of soft magnetic composite material |
| CN112247143A (en) * | 2020-10-27 | 2021-01-22 | 佛山市中研非晶科技股份有限公司 | Amorphous nanocrystalline powder coating method and inductor preparation method |
| WO2022116686A1 (en) * | 2020-12-04 | 2022-06-09 | 横店集团东磁股份有限公司 | Integrated co-fired inductor and preparation method therefor |
| KR20220079872A (en) * | 2020-12-04 | 2022-06-14 | 헹디안 그룹 디엠이지씨 마그네틱스 컴퍼니 리미티드 | All-in-one co-fired inductor and manufacturing method therefor |
| KR102687851B1 (en) * | 2020-12-04 | 2024-07-25 | 헹디안 그룹 디엠이지씨 마그네틱스 컴퍼니 리미티드 | Integrated co-fired inductor and manufacturing method thereof |
| CN113921220A (en) * | 2021-09-03 | 2022-01-11 | 广东省科学院新材料研究所 | Mixed soft magnetic powder and application thereof in preparation of soft magnetic powder core |
| CN113921220B (en) * | 2021-09-03 | 2022-07-29 | 广东省科学院新材料研究所 | Mixed soft magnetic powder and application thereof in preparation of soft magnetic powder core |
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