CN106504846A - A kind of ferrum ferrosilicon oxysome composite cores and preparation method thereof - Google Patents
A kind of ferrum ferrosilicon oxysome composite cores and preparation method thereof Download PDFInfo
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- CN106504846A CN106504846A CN201611264497.3A CN201611264497A CN106504846A CN 106504846 A CN106504846 A CN 106504846A CN 201611264497 A CN201611264497 A CN 201611264497A CN 106504846 A CN106504846 A CN 106504846A
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01F—MAGNETS; INDUCTANCES; TRANSFORMERS; SELECTION OF MATERIALS FOR THEIR MAGNETIC PROPERTIES
- H01F3/00—Cores, Yokes, or armatures
- H01F3/10—Composite arrangements of magnetic circuits
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01F—MAGNETS; INDUCTANCES; TRANSFORMERS; SELECTION OF MATERIALS FOR THEIR MAGNETIC PROPERTIES
- H01F1/00—Magnets or magnetic bodies characterised by the magnetic materials therefor; Selection of materials for their magnetic properties
- H01F1/01—Magnets or magnetic bodies characterised by the magnetic materials therefor; Selection of materials for their magnetic properties of inorganic materials
- H01F1/03—Magnets or magnetic bodies characterised by the magnetic materials therefor; Selection of materials for their magnetic properties of inorganic materials characterised by their coercivity
- H01F1/12—Magnets or magnetic bodies characterised by the magnetic materials therefor; Selection of materials for their magnetic properties of inorganic materials characterised by their coercivity of soft-magnetic materials
- H01F1/14—Magnets or magnetic bodies characterised by the magnetic materials therefor; Selection of materials for their magnetic properties of inorganic materials characterised by their coercivity of soft-magnetic materials metals or alloys
- H01F1/147—Alloys characterised by their composition
- H01F1/14766—Fe-Si based alloys
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01F—MAGNETS; INDUCTANCES; TRANSFORMERS; SELECTION OF MATERIALS FOR THEIR MAGNETIC PROPERTIES
- H01F41/00—Apparatus or processes specially adapted for manufacturing or assembling magnets, inductances or transformers; Apparatus or processes specially adapted for manufacturing materials characterised by their magnetic properties
- H01F41/02—Apparatus or processes specially adapted for manufacturing or assembling magnets, inductances or transformers; Apparatus or processes specially adapted for manufacturing materials characterised by their magnetic properties for manufacturing cores, coils, or magnets
- H01F41/0206—Manufacturing of magnetic cores by mechanical means
- H01F41/0246—Manufacturing of magnetic circuits by moulding or by pressing powder
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01F—MAGNETS; INDUCTANCES; TRANSFORMERS; SELECTION OF MATERIALS FOR THEIR MAGNETIC PROPERTIES
- H01F3/00—Cores, Yokes, or armatures
- H01F3/10—Composite arrangements of magnetic circuits
- H01F2003/106—Magnetic circuits using combinations of different magnetic materials
Abstract
The invention provides a kind of ferrum ferrosilicon oxysome composite cores, repressed successively by the raw material for including following weight/mass percentage composition and be thermally treated resulting in：The FERRITE CORE of ferro-silicium powder 80～99%, insulating wrapped agent 0.5～8% and surplus；Ferro-silicium powder after Surface coating insulating wrapped agent is coated on the ferrite magnetic wicking surface.The ferrum ferrosilicon oxysome composite cores that the present invention is provided so that the high magnetic permeability performance of the high current unsaturation ability and FERRITE CORE of ferro-silicium gives full play to, and solves the transient current aberration problems of the big switching current of Low ESR.The result of the embodiment of the present invention shows, the composite cores that the present invention is provided improve initial permeability, when magnetic field intensity is 0.2 (Oe), the pcrmeability of ferrum ferrosilicon oxysome composite cores is up to 10000, far above the initial permeability of ferrum silicon magnetic core 57 under similarity condition, it is 169 times of ferrum silica magnetic particle core pcrmeability of the prior art.
Description
Technical field
The invention belongs to technical field of magnetic materials, more particularly to a kind of ferrum silicon-ferrite composite cores and its preparation side
Method.
Background technology
Switching Power Supply is the electrical equipment be unableing to do without in life now, and commutator constitutes non-linear with electric capacity, inductive circuit
The energy storage energy component of group, but load is non-linear, can cause electric current input waveform Severe distortion, and then cause power-efficient to drop
Low.And PFC inductance realizes the regulation to the phase contrast between electric current and voltage as the critical component of Switching Power Supply, and then subtract
The low problem of power-efficient caused by the slow current distortion produced due to switching process.
But PFC inductance is primarily directed to more than 50% load to be designed, and is difficult to play a role in underloading；Simultaneously
PFC can produce the high current of mutation under discontinuous operating mode or under the conditions of inductive load, cause switching power source device easy
Sustain damage, switching loss is increased, idle power consumption increases, it is difficult to guarantee the raising of power-efficient.
In order to improve the problems of conventional PFC inductance, it is badly in need of one kind and there is high magnetic permeability and high current unsaturation energy
The magnetic core of power；Existing powder core is formed by the compacting of various soft-magnetic alloy powders, so there are countless equally distributed small air gaps,
This just determines that existing powder core has a powerful anti-saturation ability, that is, there is unsaturated characteristic under high current, but also because
For distributed air gaps, cause pcrmeability low, be usually no more than 200.
Content of the invention
In view of this, it is an object of the invention to provide a kind of ferrum silicon-ferrite composite cores and preparation method thereof, this
Ferrum silicon-ferrite the composite cores of bright offer not only have high magnetic permeability and there is the undersaturated ability of high current.
In order to realize that foregoing invention purpose, the present invention provide technical scheme below：
The invention provides a kind of ferrum silicon-ferrite composite cores, by the raw material for including following weight/mass percentage composition successively
Repressed and be thermally treated resulting in：The FERRITE CORE of ferro-silicium powder 80～99%, insulating wrapped agent 0.5～8% and surplus；Table
Bread covers the ferro-silicium powder after insulating wrapped agent and is coated on the ferrite surfaces.
Preferably, the raw material includes the ferrite of ferro-silicium powder 85～92%, insulating wrapped agent 1～5% and surplus
Magnetic core.
Preferably, the granularity of the ferro-silicium powder is 100～500 mesh.
Preferably, the FERRITE CORE includes manganese-zinc ferrite and/or nickel-zinc ferrite.
Preferably, the insulating wrapped agent is silicate, phosphoric acid, tetraethyl orthosilicate, zinc stearate, silicone resin, Muscovitum
With one or more in Kaolin.
Preferably, the ferro-silicium powder includes the component of following weight/mass percentage composition：Si 4.0～6.5%, Ti 0～
0.15%th, Ni 0～0.15%, Cr 0～0.03%, balance of Fe.
Present invention also offers the preparation method of the ferrum silicon-ferrite composite cores described in above-mentioned technical proposal, including with
Lower step：
(1) the ferro-silicium powder and insulating wrapped agent are mixed, obtains mixed material；
(2) mixed material that the step (1) is obtained and FERRITE CORE compression molding；
(3) base substrate that the step (2) is obtained is carried out the pre-heat treatment after annealing process, obtains ferrum silicon-ferrite and be combined
Magnetic core.
Preferably, in step (1), the temperature of mixing is 15～130 DEG C, and the speed of mixing is 5～60r/min, mixes
Time be 5～80min.
Preferably, in step (2), the pressure of compression molding is 10～30t/cm2.
Preferably, the temperature of the pre-heat treatment is 100～300 DEG C, and the time of the pre-heat treatment is 10～80min；Described
The temperature of annealing is 600～750 DEG C, and the time of annealing is 10～80min.
The invention provides a kind of ferrum silicon-ferrite composite cores, by the raw material for including following weight/mass percentage composition successively
Repressed and be thermally treated resulting in：The FERRITE CORE of ferro-silicium powder 80～99%, insulating wrapped agent 0.5～8% and surplus；Table
Bread covers the ferro-silicium powder after insulating wrapped agent and is coated on the ferrite surfaces.Ferrum silicon-ferrite that the present invention is provided is multiple
Close magnetic core so that the high magnetic permeability performance of the high current unsaturation ability and FERRITE CORE of ferro-silicium gives full play to, and solves
The transient current aberration problems of the big switching current of Low ESR：When rectifier tube switching moments, current distortion can be reduced effectively, be reduced
The transition loss of high current, plays a part of high current moment break-make soft landing, protects electrical equipment, improve power because
Element.The result of the embodiment of the present invention shows that the composite cores that the present invention is provided improve initial permeability, and magnetic field intensity is 0.2
(Oe) when, the pcrmeability of ferrum silicon-ferrite composite cores up to 10000, far above the initial magnetic of ferrum silicon magnetic core 57 under similarity condition
Conductance, is 169 times of FERRITE CORE pcrmeability of the prior art.
Present invention also offers the preparation method of ferrum silicon-ferrite composite cores, the present invention pass through insulating wrapped agent and
Cladding of the insulating wrapped agent to ferro-silicium powder is realized in the mixing of ferro-silicium powder, through process after ferro-silicium powder again with ferrum oxygen
Heat treatment is carried out after body magnetic core finished product is compressing, ferrum silicon-ferrite composite cores composite cores are obtained.
Specific embodiment
The invention provides a kind of ferrum silicon-ferrite composite cores, by the raw material for including following weight/mass percentage composition successively
Repressed and be thermally treated resulting in：The FERRITE CORE of ferro-silicium powder 80～99%, insulating wrapped agent 0.5～8% and surplus；Table
Bread covers the ferro-silicium powder after insulating wrapped agent and is coated on the ferrite surfaces.
Ferrum silicon-ferrite composite cores that the present invention is provided so that the high current unsaturation ability of ferro-silicium and ferrum oxygen
The high magnetic permeability performance of body magnetic core gives full play to, and solves the transient current aberration problems of the big switching current of Low ESR：Work as rectifier tube
Switching moments, can effectively reduce current distortion, reduce the transition loss of high current, play high current moment break-make soft landing
Effect, protects electrical equipment, improves electrical source power factor.
In the present invention, in terms of weight/mass percentage composition, the raw material for preparing the ferrum silicon-ferrite composite cores includes 80～
99% ferro-silicium powder, preferably 85～98%, more preferably 88～92%.In the present invention, the ferro-silicium powder
Granularity is preferably 100～500 mesh, most preferably more preferably 150～450 mesh, more preferably 200～300 mesh, 250 mesh.
In the present invention, the ferro-silicium powder is preferably granule or lamellar；When the ferro-silicium powder is graininess, the ferrum silicon
The granularity of alloyed powder is in terms of the diameter of granule ferro-silicium powder；When the ferro-silicium powder is lamellar, the ferro-silicium powder
Granularity with the length gauge of lamellar ferro-silicium powder；The thickness of the lamellar ferro-silicium powder is preferably 10～20 μm.At this
In bright, the ferro-silicium powder preferably includes the component of following weight/mass percentage composition：Si 4～6.5%, Ti 0～0.15%, Ni
0～0.15%, Cr 0～0.03%, balance of Fe；Further preferably include the component of following weight/mass percentage composition：Si 4.5～
5.5%th, Ti 0.12～0.14%, Ni 0.10～0.12%, Cr 0.02～0.025%, balance of Fe.In the present invention, institute
Ferroaluminium powder is stated so that ferrum silicon-ferrite composite cores have high current and are difficult the characteristic of saturation.The present invention is to the ferrum
The source of silicon alloy powder does not have particular/special requirement, using ferro-silicium powder well-known to those skilled in the art.
In the present invention, in terms of weight/mass percentage composition, preparing the ferrum silicon-ferrite composite cores includes 0.5～8%
Insulating wrapped agent, preferably 1～5%, more preferably 2～3%.It is special that the present invention does not have to the species of the insulating wrapped agent
Limit, using powder core well known to those skilled in the art insulating wrapped agent.In the present invention, the insulating wrapped agent
Preferably include one or more in silicate, phosphoric acid, tetraethyl orthosilicate, zinc stearate, silicone resin, Muscovitum and Kaolin.
In the present invention, the insulating wrapped to the ferro-silicium powder is realized in the insulating wrapped agent, is favorably improved general ferrum silicon and is closed
The resistivity of bronze magnetic core, reduces eddy-current loss.
In the present invention, by raw material gross mass be 100% based on, the present invention provide ferrum silicon-ferrite composite cores also wrap
Include the FERRITE CORE of surplus.In the present invention, the initial magnetic flux amount of the FERRITE CORE is preferably 2000～12000, enters
One step is preferably 5000～10000.The present invention does not have particular/special requirement to the shape of the FERRITE CORE, using art technology
Known core shapes；In an embodiment of the present invention, the FERRITE CORE is specially annular.
In the present invention, the material of the FERRITE CORE preferably includes manganese-zinc ferrite and/or nickel-zinc ferrite.At this
In invention, when the material of the FERRITE CORE includes manganese-zinc ferrite and nickel-zinc ferrite, the manganese-zinc ferrite and nickel
The mass ratio of Zn ferrite is preferably (1～99):(99～1), more preferably (15～85)：(85～15), more preferably
50:50.In the present invention, the FERRITE CORE is favorably improved magnetic under the downfield of compound iron silicon-ferrite composite cores
Conductance.
The present invention does not have particular/special requirement to the source of the manganese-zinc ferrite and nickel-zinc ferrite, using people in the art
Known to member.In the present invention, the mass ratio of the manganese and zinc of the manganese-zinc ferrite is preferably (0.3～0.4):(0.7
～0.6), more preferably 0.35:0.65；In the present invention, in the nickel-zinc ferrite, the mass ratio of nickel and zinc is preferably
(0.4～0.5)：(0.6～0.5), more preferably 0.45：0.55.
In the present invention, the ferro-silicium powder after the agent of Surface coating insulating wrapped is coated on the ferrite surfaces..
Present invention also offers a kind of preparation method of ferrum silicon-ferrite composite cores described in above-mentioned technical proposal, including
Following steps：
(1) the ferro-silicium powder and insulating wrapped agent are mixed, obtains mixed material；
(2) mixed material for obtaining the step (1) and FERRITE CORE compression molding, obtain base substrate；
(3) the base substrate the pre-heat treatment after annealing for obtaining the step (2) is processed, and obtains ferrum silicon-ferrite composite cores.
Ferro-silicium powder is mixed by the present invention with insulating wrapped agent, obtains mixed material.In the present invention, the mixing
Temperature is preferably 15～130 DEG C, more preferably 20～120 DEG C, more preferably 40～100 DEG C, most preferably 80～90 DEG C；
In the present invention, the speed of the mixing is preferably 5～60r/min, more preferably 15～55r/min, more preferably 20
～40r/min, most preferably 30r/min；In the present invention, the time of the mixing is preferably 5～80min, further preferably
For 10～70min, most preferably more preferably 30～50min, 45min.Mixed process of the present invention realizes insulating wrapped agent
Cladding to ferro-silicium powder.
After obtaining mixed material, the mixed material and FERRITE CORE compression molding are obtained base substrate by the present invention.At this
In invention, the compression molding makes the mixed material be coated on ferrite magnetic wicking surface so that Surface coating has insulating wrapped
Magnetic ferro-silicium powder FERRITE CORE is coated in, form magnetic core entirety.In the present invention, the pressure of the compression molding
Power is preferably 10～30t/cm2, more preferably 12～28t/cm2, more preferably 15～25t/cm2, most preferably 20t/
cm2.The present invention, under the pressure, the time of pressurize is preferably 2～30s, more preferably 10～25s, more preferably 15
～20s.
The present invention does not have particular/special requirement to the specific embodiment of the compression molding, ripe using those skilled in the art institute
The compression molding mode that knows.In the present invention, the compression molding is particularly preferred as：Part mixes are added in a mold
Material, adds FERRITE CORE, finally remainder mixed material is filled in the space between ferrite and mould and is pressurizeed.This
Invention does not have special restriction to the ratio of two parts mixed material, and the size according to mould and FERRITE CORE is adjusted
Whole.
After obtaining base substrate, the base substrate is carried out the pre-heat treatment after annealing process by the present invention, is obtained ferrum silicon-ferrite and is combined
Magnetic core.In the present invention, the temperature of the pre-heat treatment is preferably 100～300 DEG C, more preferably 120～280 DEG C, more
Preferably 150～250 DEG C, most preferably 200 DEG C；In the present invention, the time of the pre-heat treatment is preferably 10～80min,
More preferably 15～65min, more preferably 30～40min.In the present invention, the pre-heat treatment is preferably in vacuum or lazy
Carry out under property gas shield.In the present invention, the vacuum of the vacuum is preferably 0.001～0.1Pa.In the present invention, institute
The flow for stating noble gases is preferably 4～10L/min, more preferably 5～6L/min；The noble gases are preferably nitrogen
Or argon.In the present invention, the pre-heat treatment can make the organic carbon in covering, contribute to realizing covering to ferrum
The cladding of silicon alloy powder.
After completing the pre-heat treatment, described in preferred pair of the present invention, the pre-heat treatment product is made annealing treatment, obtain ferrum silicon-
Ferrite composite cores.In the present invention, the temperature of the annealing is preferably 600～750 DEG C, and more preferably 600
～720 DEG C, more preferably 650～700 DEG C；In the present invention, the time of the annealing is preferably 10～80min, enters one
Step is preferably 15～65min, most preferably more preferably 25～50min, 35～40min.In the present invention, the annealing
It is preferred that carrying out under vacuum or inert gas shielding.In the present invention, the vacuum of the vacuum is preferably 0.001～0.1Pa.
In the present invention, the flow of the noble gases is preferably 4～10L/min, more preferably 5～6L/min；The inertia
Gas is preferably nitrogen or argon.In the present invention, described annealing contributes to the elimination of internal stress.
In order to further illustrate the present invention, with reference to ferrum silicon-ferrite composite cores that embodiment is provided to the present invention
And preparation method thereof be described in detail, but they can not be interpreted as limiting the scope of the present invention.
Comparative example 1:
The ferrum silicon magnetic core of model ETF330060 of Jiangxi Ai Te Ci Cai company limiteies production, normal permeability is 60, its
The size of middle magnetic core is OD33.1mm × ID19.2mm × HT11.5mm；The chemical composition of ferro-silicium powder is Si 6.5% and remaining
The Fe of amount.
Embodiment 1:
The ferro-silicium powder that 300 mesh weight are 28 grams is existed with 5～60r/min mixing rates with 1g phosphoric acid and 1g sodium silicate
Mixed at room temperature 10min, obtains mixed material；The chemical composition of wherein ferro-silicium powder is the Fe of Si 6.5% and surplus.
12g mixed materials are put in the mould of OD33.02mm × ID19.90mm × HT15mm, then by quality be 3g
, size is put in mould for the ferrite core of nickel-zinc of OD30mm × ID25mm × HT3mm, is finally mixed remaining 18g
Material is put in mould, and pressure reaches 21T/cm2When keep 10s, move back mold forming and obtain base substrate；
By base substrate under conditions of vacuum 0.08Pa, 200 DEG C of insulation 50min the pre-heat treatments obtain ferrum silicon-ferrite multiple
Close magnetic core presoma；
Under same vacuum condition, in 700 DEG C of constant temperature 60min, furnace cooling, ferrum silicon-ferrite composite cores are obtained.
Embodiment 2:
By ferro-silicium powder that 200 mesh weight are 28.9 grams and 0.3g tetraethyl orthosilicates and 0.8g zinc stearates, with 60r/
Min speed mixes 10min at 80 DEG C, obtains mixed material；The chemical composition of wherein ferro-silicium powder is Si 6.5% and surplus
Fe.
20g mixed materials are put in the mould of OD33.02mm × ID19.90mm × HT15mm, then by the size of 3g
Manganese-zinc ferrite core for OD30mm × ID25mm × HT3mm is put in mould, is finally put into remaining 10g mixed materials
In mould, pressurize 20T/cm215s is kept, mold forming is moved back, is obtained base substrate；
In condition of nitrogen gas of the flow for 5L/min, after 250 DEG C of the pre-heat treatments 80min, in identical atmosphere, 680 DEG C are moved back
Fire processes 80min, obtains ferrum silicon-ferrite composite cores.
Embodiment 3
By ferro-silicium powder that 500 mesh weight are 28 grams and 1.5g phosphoric acid and 0.5g sodium silicate, existed with 30r/min speed
130 DEG C of mixing 15min, obtain mixed material；The chemical composition of wherein ferro-silicium powder is the Fe of Si6.5% and surplus.
15g mixed materials are put in the mould of OD33.02mm × ID19.90mm × HT15mm, then by two
OD30mm × ID25mm, height and is put in mould for the manganese-zinc ferrite and nickel-zinc ferrite of 3mm, manganese-zinc ferrite and nickel zinc
Ferritic quality and be 3g, wherein in composite cores the mass ratio of manganese-zinc ferrite and nickel-zinc ferrite be 50:50；Finally will
Remaining 15g mixed materials are put in mould, and pressurize 10T/cm220s is kept, mold forming is moved back, is obtained base substrate；
In condition of nitrogen gas of the flow for 5L/min, after 300 DEG C of the pre-heat treatments 40min, in identical atmosphere, 710 DEG C are moved back
Fire processes 80min, obtains ferrum silicon-ferrite composite cores.
Ferrum silica magnetic particle core in comparative example 1, the ferrum silicon-ferrite composite cores in embodiment 1～3 are carried out pcrmeability survey
Examination, test result are as shown in table 1.Wherein, pcrmeability test instrumentation puts 3532 electric bridges day for Japan, and magnetic field is provided as Changzhou Tong Hui
TH1775 bias current sources.
The pcrmeability of magnetic core in 1 comparative example 1 of table and embodiment 1～3
| Magnetic field intensity/Oe | 0.2 | 0.5 | 0.8 | 1.0 | 10.0 | 20.0 | 30.0 | 40.0 | 50.0 | 60.0 | 70.0 | 80.0 | 90.0 | 100.0 |
| Comparative example 1 | 57.0 | 59.0 | 60.0 | 60.0 | 60.0 | 58.0 | 55.0 | 52.0 | 50.0 | 49.0 | 45.0 | 42.0 | 41.0 | 40.0 |
| Embodiment 1 | 10000.0 | 5000.0 | 2200.0 | 60.0 | 58.4 | 56.8 | 53.6 | 51.0 | 48.0 | 46.8 | 43.0 | 39.6 | 37.4 | 35.2 |
| Embodiment 2 | 10000.0 | 8000.0 | 5300.0 | 105.0 | 59.0 | 57.3 | 54.7 | 51.8 | 48.7 | 47.5 | 44.0 | 40.5 | 39.0 | 37.6 |
| Embodiment 3 | 9800.0 | 7800.0 | 5400.0 | 110.0 | 60.0 | 58.0 | 55.0 | 51.2 | 49.0 | 48.0 | 45.0 | 41.0 | 39.0 | 36.0 |
As it can be seen from table 1 before 0.8 oersted of magnetic field intensity (Oe), ferrum silicon-ferrite that the present invention is provided is combined
The pcrmeability of magnetic core is significantly larger than existing sendust core；The initial of FERRITE CORE is essentially when magnetic field intensity is 0.2 (Oe)
Pcrmeability.Simultaneously can be as can be seen that ferrum silicon-ferrite composite cores that the present invention is provided improve initial permeability, magnetic field
When intensity is 0.2 (Oe), it is this bulk permeability of ferrite core portion in prior art.
Ferrum silicon-improvement effect of the ferrite composite cores to power-efficient that test is prepared, wherein power supply are from boat
Good gold medal 80plus 500w pc power supplys：In 10% underloading and Several Typical Load (50% load), existing ferrum silica magnetic particle core test
Efficiency is respectively 76%, 82.5%, under 10% underloading of power-efficient under the conditions of the composite cores that embodiment 1～3 is prepared
80.2%, 80.8,82.1% is promoted to respectively by 76%；Be promoted to 83.4% by original 82.5% under 50% Several Typical Load,
84% and 86%.It can be seen that, the composite cores that prepare of the present invention can increase substantially power supply light-load efficiency, to Several Typical Load under
Power-efficient also effectively can be lifted.
The electric current that magnetic field intensity is carried to product is directly proportional, and magnetic field is bigger, and the electric current carried by which is bigger；Low-intensity magnetic field, be
The transition starting point of alternating current, high magnetic permeability can improve transition impedance, and as shown in Table 1, under low-intensity magnetic field, the present invention is prepared
Composite cores pcrmeability high, get over larger transition impedance, circuit soft switch requirement can be met.
As can be seen from Table 1, under different magnetic field intensity, the magnetic of ferro-silicium magnetic core and ferrum silicon-ferrite composite cores
Conductance is not 0, is respectively provided with high current unsaturation characteristic；And when magnetic field intensity is higher, it is compound that the present invention is prepared
The pcrmeability of magnetic core is not significantly decreased, with 50Oe magnetic field intensities compared with the pcrmeability under ferrum aluminum magnetic core similarity condition
As a example by, magnetic core made by the present invention only have dropped (50-48)/50=4% with the pcrmeability of general magnetic core, preferably maintain ferrum
Original high current unsaturation characteristic of silicon magnetic core.
The above is only the preferred embodiment of the present invention, it is noted that for the ordinary skill people of the art
For member, under the premise without departing from the principles of the invention, some improvements and modifications can also be made, these improvements and modifications also should
It is considered as protection scope of the present invention.
Claims (9)
1. a kind of ferrum silicon-ferrite composite cores, by the raw material for including following weight/mass percentage composition is repressed successively and heat treatment
Obtain：The FERRITE CORE of ferro-silicium powder 80～99%, insulating wrapped agent 0.5～8% and surplus；Surface coating insulating wrapped
Ferro-silicium powder after agent is coated on the ferrite magnetic wicking surface.
2. ferrum silicon-ferrite composite cores according to claim 1, it is characterised in that the raw material includes ferro-silicium
The FERRITE CORE of powder 85～92%, insulating wrapped agent 1～5% and surplus.
3. ferrum silicon-ferrite composite cores according to claim 1 and 2, it is characterised in that the grain of the ferro-silicium powder
Spend for 100～500 mesh.
4. ferrum silicon-ferrite composite cores according to claim 1 and 2, it is characterised in that the FERRITE CORE includes
Manganese-zinc ferrite and/or nickel-zinc ferrite.
5. ferrum silicon-ferrite composite cores according to claim 1 and 2, it is characterised in that the insulating wrapped agent is silicon
One or more in hydrochlorate, phosphoric acid, tetraethyl orthosilicate, zinc stearate, silicone resin, Muscovitum and Kaolin.
6. ferrum silicon-ferrite composite cores according to claim 1 and 2, it is characterised in that the ferro-silicium powder includes
The component of following weight/mass percentage composition：Si 4.0～6.5%, Ti 0～0.15%, Ni 0～0.15%, Cr 0～0.03%,
Balance of Fe.
7. the preparation method of the ferrum silicon-ferrite composite cores described in any one of claim 1～6, comprises the following steps：
(1) the ferro-silicium powder and insulating wrapped agent are mixed, obtains mixed material；
(2) mixed material for obtaining the step (1) and FERRITE CORE compression molding, obtain base substrate；The compression molding
The mixed material is made to be coated on ferrite magnetic wicking surface；
(3) the base substrate the pre-heat treatment after annealing for obtaining the step (2) is processed, and obtains ferrum silicon-ferrite composite cores.
8. preparation method according to claim 7, it is characterised in that temperature of mixing is 15～130 in step (1)
DEG C, the speed of mixing is 5～60r/min, and the time of mixing is 5～80min.
9. preparation method according to claim 7, it is characterised in that the pressure of compression molding is 10 in step (2)
～30t/cm2.
Preparation method according to claim 7, it is characterised in that the temperature of the pre-heat treatment is 100～300 DEG C, in advance
The time of heat treatment is 10～80min；The temperature of the annealing is 600～750 DEG C, time of annealing is 10～
80min.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201611264497.3A CN106504846B (en) | 2016-12-30 | 2016-12-30 | A kind of iron silicon-ferrite composite cores and preparation method thereof |
Applications Claiming Priority (1)
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| CN108987062A (en) * | 2018-07-05 | 2018-12-11 | 浙江大学 | A kind of ferrite-magnetically soft alloy composite cores and preparation method thereof |
| CN109192430A (en) * | 2018-08-31 | 2019-01-11 | 北京科技大学广州新材料研究院 | Improve the preparation method and product of metal soft magnetic powder core high frequency Effective permeability |
| CN111777419A (en) * | 2020-05-29 | 2020-10-16 | 天长市烁源磁电有限公司 | Sintering process of magnetic ferrite core |
| CN112071621A (en) * | 2020-09-09 | 2020-12-11 | 德清鑫晨新材料有限公司 | Manufacturing equipment of iron-silicon alloy magnetic powder core material with high direct-current superposition characteristic |
| CN112435821A (en) * | 2020-11-05 | 2021-03-02 | 青岛云路先进材料技术股份有限公司 | High-efficiency magnetic powder core and preparation method thereof |
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