CN109741913A - A kind of composite cores and preparation method thereof of controllable magnetic property - Google Patents
A kind of composite cores and preparation method thereof of controllable magnetic property Download PDFInfo
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Abstract
The invention discloses a kind of composite cores and preparation method thereof of controllable magnetic property, the composite cores are by laminating layer by layer and being made after band-like compound soft magnetic material is rolled and/or shearing；The band-like compound soft magnetic material is bonded with double faced adhesive tape by one or more layers magnetically soft alloy band and is made, and every layer of band is bonded one layer of double faced adhesive tape；The magnetically soft alloy is at least one of amorphous alloy, nanometer crystal alloy or sub-nanometer alloy.The present invention can carry out property regulation by the fragmentation processing to magnetically soft alloy band in magnetic core, make it have the excellent properties such as regulatable stable magnetic conductivity, ultralow high-frequency loss and excellent anti-direct current biasing ability, it solves the problems in the presence of current powder core, is had a good application prospect in various high-frequency electronic components field.
Description
Technical field
The present invention relates to field of magnetic material to be related to simultaneously more particularly, to a kind of composite cores of controllable magnetic property
Preparation method.
Background technique
A kind of functional component of the powder core as electromagnetic conversion, is widely used at present in all kinds of power electronic devices,
Especially in high-frequency electronic element, powder core has become required component.But currently with electronic component towards it is small-sized, energy saving,
High frequency, highly sensitive direction are developed, traditional powder core for example ferrocart core, Fe-Si powder core, Fe-Si-Al powder core, Fe-Ni powder core and
Fe-Ni-Mo powder core etc., be gradually difficult to meet the requirement of component: ferrocart core high frequency characteristics is bad, and high-frequency loss is high；
Fe-Si powder core direct current biasing is had excellent performance, but high-frequency loss is high；The loss of Fe-Si-Al powder core is low, and frequency performance is good, but direct current is inclined
It is not ideal enough to set characteristic；Fe-Ni powder core has optimal direct current biasing characteristic, but price and high-frequency loss are higher；Fe-Ni-Mo
Powder core best performance is got over, but price also most expensive [CN201410394382.0, CN201810117282.1].
Fe based amorphous nano alloy due to high magnetic permeability under high saturated magnetic induction (Bs), high frequency, low-loss,
The advantages such as low cost, amorphous nano-crystalline alloy strip steel rolled stock is widely applied in field of power electronics at present, obtains good section
Energy consumption reduction, device miniaturization and high power and other effects.Therefore, Fe based amorphous nano powder core is increasingly becoming in recent years grinds
The hot spot studied carefully and applied has now been found that Fe based amorphous nano powder core has permanent magnetic conductivity, high resistivity, low in high frequency
Loss, the advantages that temperature stability is good, are the important development directions of the following high-performance magnetism powder core.
However, the powder prepared mostly using band crush method about the research and development of amorphous nano-crystalline powder core at present
(such as Chinese patent application CN201310018768.7, CN201310280793.2, CN201410394382.0,
CN201810117282.1 etc.), it is readily incorporated impurity during ball mill crushing is at amorphous nano crystalline flour, leads to the group of powder
It is point uneven, meanwhile, powder obtained is mostly the sheet with corner angle and wedge angle, it is difficult to insulate, cause the loss of powder core compared with
High, anti-direct current biasing ability is poor, stability is undesirable.And it is limited to the particularity of amorphous nano peritectic alloy, using atomization
The spherical amorphous nano-crystalline powder of method preparation high quality is also not easy, and main cause is the powder sphericity of water atomization preparation
The cooling rate of low, high oxygen content, gas atomization is relatively low, and powder is not easy to form completely amorphous state, and soft magnet performance deteriorates.Therefore,
Amorphous nano-crystalline powder core using seriously hampered.
Summary of the invention
In order to overcome the existing disadvantages mentioned above and deficiency in high frequency magnetic core application, the present invention is for high-frequency electromagnetic device to it
The performance requirement of middle magnetic core proposes a kind of new magnetic core scheme, i.e., a kind of composite cores of controllable magnetic property.
The technical solution of the present invention is to provide a kind of composite cores of controllable magnetic property, which is by band-like multiple
Close soft magnetic materials it is rolled and/or shearing after laminate and be made layer by layer；Wherein band-like compound soft magnetic material is soft by one or more layers
Magnetic alloy band is bonded with double faced adhesive tape to be made, and every layer of magnetically soft alloy band is bonded one layer of double faced adhesive tape；The magnetically soft alloy is
At least one of amorphous alloy, nanometer crystal alloy or sub-nanometer alloy.
Further, when band-like compound soft magnetic material is made of multilayer magnetically soft alloy band, magnetically soft alloy can be non-
One of peritectic alloy, nanometer crystal alloy or sub-nanometer alloy or a variety of combinations.
Further, the thickness of double faced adhesive tape is at 15 μm or less (including 15 μm), and the thickness of magnetically soft alloy band is at 40 μm
(including 40 μm) below.
Further, the controllable adjustment of composite cores performance is realized by the fragmentation processing to magnetically soft alloy band.
Further, composite cores can have any shape, including but not limited to circular ring shape, rectangular, C-shaped, E shape, strip
Shape, abnormal shape etc..
Further, dress shield box, surface coated with resins or insulated paint, winding insulating paper or empire cloth can be used in composite cores
Etc. modes protected.
Another aspect of the present invention also proposes a kind of preparation method of the composite cores of controllable magnetic property, mainly includes as follows
Step:
(1) it is heat-treated: selecting the group of a kind of suitable magnetically soft alloy band or a variety of bands according to the performance requirement of magnetic core
It closes, magnetically soft alloy band is heat-treated under the conditions of it is respectively suitable；
(2) it is bonded: double faced adhesive tape being bonded completely with the magnetically soft alloy band after heat treatment, if compound soft magnetic material is more
Layer band design also needs to fit to multilayer magnetically soft alloy band together, and retains the protective film of outermost layer double-sided adhesive, is made
Band-like compound soft magnetic material；
(3) broken magnetic treatment: suitable broken magnetic mold is selected according to the performance requirement of magnetic core, by band obtained in step (2)
Shape compound soft magnetic material carries out broken magnetic treatment, and full wafer magnetically soft alloy band therein is processed into the fragment of specific dimensions and shape
Equally distributed structure；
(4) it shears: according to the requirement of core structure and size, compound soft magnetic material obtained in step (3) being cut into
The strip material of specific width or the composite sheet of specific shape；
(5) the band-like compound soft magnetic material sheared in step (4) form forming magnetic core: is wound into institute using magnetic core winding machine
The magnetic core of size is needed, or the composite sheet sheared in step (4) is laminated into the magnetic core of required size and structure；
(6) protection is handled: according to the use occasion needs of magnetic core, by magnetic core obtained in step (5) be packed into shield box or into
Row surface coating processing or surface wrap insulating paper or empire cloth etc., carry out protection processing.
Further, the magnetically soft alloy band in step (1) is amorphous alloy strips, nanometer crystal alloy band or sub-nanometer
One or more of alloy strip steel rolled stock.
Further, in step (2), if magnetically soft alloy band be it is a variety of, also need first according to the performance requirement of magnetic core carry out
The design of magnetically soft alloy band combination, then carries out double-sided adhesive fitting again.
It further, can broken magnetic treatment according to the performance requirement of magnetic core without step (3) in preparation step.
Further, molding magnetic core can have any shape in step (5), including but not limited to circular ring shape, rectangular, C
Shape, E shape, strip, abnormal shape etc..
The advantages of the present invention:
(1) using ultrathin double-face glue as binder and dielectric, on the one hand by amorphous alloy, nanometer crystal alloy or Asia
Nanoalloy band is bonded to the stable magnetic core of structure snd size, overcomes the embrittlement issue of band after heat treatment, improves
The stability of magnetic core；On the other hand the insulation for realizing band interlayer, greatly reduces high-frequency loss.
(2) double-sided adhesive intensity is lower, can be extended due to tension in winding process, and the present invention utilizes double-sided adhesive
This characteristic, the elongation of fragment spacing in layer is realized in the band-like compound soft magnetic material winding process after broken magnetic, and realize
The stable insulation of fragment, further reduced the high-frequency loss of magnetic core in layer.
(3) each layer band is carried out at different degrees of, controllable broken magnetic using the broken magnetic mold of different sizes and structure
Reason realizes the controllable adjustment to performance indicators such as magnetic permeability, losses, obtains regulatable stable magnetic conductivity, ultralow height
The excellent properties such as frequency loss and excellent anti-direct current biasing ability.
In conclusion NEW TYPE OF COMPOSITE magnetic core of the invention has both regulatable magnetic property, ultralow high-frequency loss and excellent
The advantages such as anti-direct current biasing performance, preparation process is simply controllable, solves the problems in the presence of current powder core, not
To have good application prospect in high-frequency electron device field.
Detailed description of the invention
Fig. 1 is the schematic device that single layer magnetically soft alloy band is bonded single-layer double-side adhesive tape and broken magnetic.
Fig. 2 is that single layer magnetically soft alloy band is bonded the compound soft magnetic material structural representation being prepared into after single-layer double-side adhesive tape
Figure.
Fig. 3 is that the compound soft magnetic material of single layer alloy band winds the three-dimensional signal for the different structure shape magnetic core to be formed
Figure.
Fig. 4 is that square annular compound magnetic core loading shield box obtains stereoscopic schematic diagram.
Fig. 5 is that the compound soft magnetic material of single layer alloy band cuts into the different structure shape magnetic that composite sheet laminates preparation
The stereoscopic schematic diagram of core.
Fig. 6 is the schematic device that two layers of magnetically soft alloy band is bonded two layers of double faced adhesive tape and broken magnetic.
Two layers of magnetically soft alloy band of Fig. 7 is bonded the structural schematic diagram of the compound soft magnetic material prepared after two layers of double faced adhesive tape.
Fig. 8 is the stereoscopic schematic diagram of toroidal cores made of the compound soft magnetic material of two layers of alloy strip steel rolled stock is wound.
Wherein, 1,1a, 1b are magnetically soft alloy band；10a, 10b are magnetically soft alloy band conveying roller；101a, 101b are double
Face adhesive tape conveying roller；101c is double faced adhesive tape demoulding roller；102a, 102b are pressure roll；103a, 103b are broken magnetic roller；13 be band
Shape compound soft magnetic material；104 be compound soft magnetic material wind-up roll；2,2a, 2b are double faced adhesive tape；3 be double faced adhesive tape protective film；4
For magnetic core；51 be shield box top；52 be shield box lower part.
Specific embodiment
The present invention is described in further details with specific embodiment with reference to the accompanying drawing.
Fig. 1 show single layer magnetically soft alloy band 1 and is bonded with single-layer double-side adhesive tape 2, and will be compound soft after fitting
Magnetic material carries out a kind of schematic device of broken magnetic treatment.For simplicity, the steelframe, platform and control of each rotating roller is supported to drive
Dynamic device is not drawn in figure.During entire fitting and broken magnetic, band conveying roller 10a, double faced adhesive tape conveying roller 101a, pressure
Power roller 102a and 102b, broken magnetic roller 103a and 103b and compound soft magnetic material wind-up roll 104 are by arrow direction rotation in figure.Figure
In a pair of mutually matched broken magnetic mold with particular design structure snd size can be assembled on broken magnetic roller 103a and 103b, will
The compound soft magnetic material posted carries out the broken magnetic treatment of predetermined design, full wafer magnetically soft alloy band therein can be processed into spy
Determine the equally distributed structure of fragment of size and shape.It can also be required according to the service performance of magnetic core, without broken magnetic treatment.
Fig. 2 is the composite soft-magnetic material that the single layer alloy band after rubberizing, broken magnetic treatment is carried out according to device figure shown in FIG. 1
The concrete structure schematic diagram of material 13.
Embodiment 1:
Magnetically soft alloy band is Fe78Si9B13Amorphous alloy strips, thickness of strip are 25 μm, width 60mm；Double-sided adhesive is thick
Degree is 5 μm, width 65mm.
Amorphous alloy strips are provided in vacuum heat treatment furnace, cools down after heat preservation 90min at 375 DEG C, come out of the stove.By figure
Shown in 1, amorphous alloy strips 1, the double faced adhesive tape 2 after heat treatment are separately mounted on corresponding conveying roller 10a and 101a, opened
Dynamic device carries out fitting and broken magnetic.Amorphous alloy strips 1 with double faced adhesive tape 2 is pressurized among pressure roll 102a and 102b is bonded
Compound soft magnetic material 13 is formed later, is transported out among pressure roll 102a and 102b, is carried out through broken magnetic roller 103a and 103b
Broken magnetic treatment.Compound soft magnetic material 13 after broken magnetic treatment is wound by wind-up roll 104.The composite soft-magnetic material of the present embodiment
For material through different degrees of broken magnetic treatment, each average-size of band fragment is as shown in table 1.
The compound soft magnetic material 13 wound is cut into the narrow strip material that 2 width are 25mm, benefit through roller shearing machine
The compound soft magnetic material 13 of 25mm wide is wound into the annulus magnetic core of internal diameter 30mm, outer diameter 40mm with magnetic core winding machine, such as Fig. 3 a
It is shown；Using square core mold, it is 30mm × 30mm, outside that the compound soft magnetic material 13 of 25mm wide, which is wound into inside dimension,
Square toroidal core having a size of 40mm × 40mm, as shown in Figure 3b.Then magnetic core is packed into shield box, as shown in figure 4, utilizing impedance
Magnetic conductivity of the magnetic core of the different broken magnetic degree (i.e. different chip sizes) of analyzer test at 100kHz, is listed in Table 1 below.
Seen from table 1, by the design of broken magnetic mold, the amorphous alloy strips 1 in magnetic core are carried out different degrees of broken
Magnetic treatment can effectively regulate and control the soft magnet performance of magnetic core: magnetic conductivity of the magnetic core of not broken magnetic treatment at 100kHz is about 3500,
When fragment average-size is biggish 4mm, magnetic conductivity has been decreased obviously；And with the reduction of fragment average-size, magnetic core
Magnetic conductivity continuous downward trend is presented.This is real just because of magnetic core internal fragmentation degree is constantly promoted, and between fragment
The reason of existing good insulation, this can also cause being greatly reduced for magnetic core eddy-current loss, realize magnetic core ultra-low loss in high frequency
Effect.
Embodiment 2:
Magnetically soft alloy band is Fe73.5Si13.5B9Nb3Cu1Nanometer crystal alloy band, thickness of strip are 20 μm, and width is
60mm；Double-sided adhesive is with a thickness of 5 μm, width 65mm.
Nanometer crystal alloy band is provided in vacuum heat treatment furnace, cools down after heat preservation 110min at 540 DEG C, come out of the stove.
Nanometer crystal alloy band is bonded with double faced adhesive tape and broken magnetic forms band-like compound soft magnetic material, then by band-like compound soft magnetic material system
It is standby to see in embodiment 1 at circular ring shape and square toroidal core, and to the process of the magnetic core progress permeability measurement of different broken magnetic degree
Statement, details are not described herein again.
The magnetic core of the broken magnetic degree of difference of the present embodiment, between the average-size and magnetic conductivity of band fragment it is corresponding such as
Shown in table 1.As it can be seen that the magnetic conductivity of magnetic core equally may be used with consistent in the variation tendency and embodiment 1 of chip size in the present embodiment
Speculate, the loss of the magnetic core of the present embodiment in high frequency will be also presented with the decline of chip size to be remarkably decreased, that is, passes through conjunction
Suitable broken magnetic treatment can get ultralow high-frequency loss.
Embodiment 3
Magnetically soft alloy band is Fe82Si3B13Cu1.2Zr0.8Sub-nanometer alloy strip steel rolled stock.Thickness of strip is 20 μm, and width is
50mm；Double-sided adhesive is with a thickness of 5 μm, width 55mm.
Sub-nanometer alloy strip steel rolled stock is provided in vacuum heat treatment furnace, cools down after heat preservation 15min at 550 DEG C, come out of the stove.It is sub-
Nanoalloy band is bonded with double faced adhesive tape and broken magnetic forms the process of band-like compound soft magnetic material volume and sees in embodiment 1 and state,
Details are not described herein again.The compound soft magnetic material 13 wound is punched into the composite sheet of two kinds of shapes: long 45mm, width respectively
The annular sheet material in side that the strip sheet material and inside dimension of 10mm is 35mm × 50mm, external dimensions is 45mm × 60mm, by this
Two kinds of sheet materials are laminated into two kinds of magnetic cores respectively: 45mm × 10mm × 10mm strip magnetic core (as shown in schematic diagram 5a) and interior
Portion having a size of 35mm × 50mm, external dimensions be 45mm × 60mm, a height of 15mm square toroidal core (as shown in schematic diagram 5c),
Then part side's toroidal core can be also cut in half, is prepared into C-shaped core as shown in Figure 5 b.It is tested using impedance analyzer
Magnetic conductivity of each magnetic core of different broken magnetic degree (i.e. different chip sizes) at 100kHz, is listed in Table 1 below.
By data in table 1 as it can be seen that the magnetic core being prepared, magnetic conductivity is laminated in the present embodiment using compound soft magnetic material
It is consistent with embodiment 1 and embodiment 2 with the variation tendency of chip size, it is same it could be speculated that the magnetic core of the present embodiment is in high frequency
Under loss will also present and be remarkably decreased with the decline of chip size, i.e., ultralow height can get by suitable broken magnetic treatment
Frequency is lost.
Fig. 6 show double-deck magnetically soft alloy band 1a, 1b and is bonded with two layers double faced adhesive tape 2a, 2b, is formed with double
The compound soft magnetic material of layer magnetically soft alloy band and double-layer and double-side glue, and a kind of dress of broken magnetic treatment is carried out to compound soft magnetic material
Set schematic diagram.For simplicity, the steelframe, platform and control driving device of each rotating roller is supported not to draw in figure.Entire
During fitting and broken magnetic, band conveying roller 10a and 10b, double faced adhesive tape conveying roller 101a and 101b, double faced adhesive tape demoulding roller
101c, pressure roll 102a and 102b, broken magnetic roller 103a and 103b and compound soft magnetic material wind-up roll 104 are by arrow direction in figure
Rotation.A pair of broken magnetic mutually matched, with particular design structure snd size can be assembled in figure on broken magnetic roller 103a and 103b
The compound soft magnetic material posted is carried out the broken magnetic treatment of predetermined design by mold, can be by full wafer magnetically soft alloy band therein
It is processed into the equally distributed structure of fragment of specific dimensions and shape.It can also be required according to the service performance of magnetic core, without broken
Magnetic treatment.In the present invention, band conveying roller and two-sided can accordingly be increased according to the design of the band number of plies in compound soft magnetic material
The logarithm of adhesive tape conveying roller (and its corresponding double faced adhesive tape demoulding roller).
Fig. 7 is to have two layers of alloy strip steel rolled stock and two layers pair after carrying out rubberizing, broken magnetic treatment according to device figure shown in fig. 6
The concrete structure schematic diagram of the compound soft magnetic material 13 of face glue.
Embodiment 4:
Magnetically soft alloy band is two kinds: Fe82Si3B13Cu1.2Zr0.8Sub-nanometer alloy strip steel rolled stock 1a and
Fe73.5Si13.5B9Nb3Cu1Nanometer crystal alloy band 1b.Two kinds of thickness of strip are 20 μm, and width is 60mm；Double-sided adhesive thickness
It is 5 μm, width 65mm.
Sub-nanometer alloy strip steel rolled stock 1a carries out heat treatment 15min under the conditions of 550 DEG C, and nanometer crystal alloy band 1b is at 540 DEG C
Under the conditions of carry out heat treatment 110min.As shown in Figure 6, by the sub-nanometer alloy strip steel rolled stock 1a and nanometer crystal alloy band after heat treatment
1b, double faced adhesive tape 2a and 2b are separately mounted on corresponding conveying roller, and starter carries out fitting and broken magnetic.Sub-nanometer alloy strip
Material 1a, nanometer crystal alloy band 1b, double faced adhesive tape 2a and 2b are formed after pressurized fitting among pressure roll 102a and 102b
Compound soft magnetic material 13 transports out among pressure roll 102a and 102b, carries out broken magnetic treatment through broken magnetic roller 103a and 103b.
Compound soft magnetic material 13 after broken magnetic treatment is wound by wind-up roll 104.The compound soft magnetic material of the present embodiment equally passes through
Each average-size of different degrees of broken magnetic treatment, band fragment is as shown in table 1.
The compound soft magnetic material 13 wound is cut into the narrow strip material that 2 width are 25mm, benefit through roller shearing machine
The compound soft magnetic material 13 of 25mm wide is wound into the toroidal cores of internal diameter 30mm, outer diameter 40mm, such as Fig. 8 with magnetic core winding machine
It is shown.Magnetic conductivity of the magnetic core of different broken magnetic degree (i.e. different chip sizes) at 100kHz is tested using impedance analyzer,
It is listed in Table 1 below.
By data in table 1 as it can be seen that using the compound magnetic core being prepared of two kinds of magnetically soft alloy bands, magnetic in the present embodiment
Conductance is consistent in embodiment 1,2,3 with the variation tendency of its internal fragmentation size, equally it could be speculated that the magnetic core of the present embodiment
Loss in high frequency will be also presented with the decline of chip size to be remarkably decreased, i.e., can get by suitable broken magnetic treatment super
Low high-frequency loss.
Moreover, using Fe82Si3B13Cu1.2Zr0.8Sub-nanometer alloy and Fe73.5Si13.5B9Nb3Cu1Two kinds of nanometer crystal alloy
The compound magnetic core of band, the permeability value in the case of same chip size (are implemented between single nanometer crystal alloy magnetic core
Example 2) and single sub-nanometer alloy core (i.e. embodiment 3) between, it is seen then that use the composite cores side of designing and preparing of the invention
Method can carry out the controllable modulation of magnetic core performance, be quickly found out required performance by the matched combined of a variety of magnetically soft alloy bands
Magnetic Core Design scheme.
The permeability value of the magnetic core of different chip sizes in 1 various embodiments of the present invention of table
The present embodiments relate to the material arrived, reagent and experimental facilities, are to meet magnetic material unless otherwise instructed
The commercial product in field.
The above is merely a preferred embodiment of the present invention, it is noted that for those skilled in the art
For, under the premise of not departing from core of the invention technology, improvements and modifications can also be made, these improvements and modifications are also answered
Belong to scope of patent protection of the invention.With any change in the comparable meaning and scope of claims of the present invention, all
It is considered as being included within the scope of the claims.
Claims (10)
1. the composite cores of controllable magnetic property, which is characterized in that composite cores be by band-like compound soft magnetic material it is rolled and/
Or it laminates and is made layer by layer after shearing；The band-like compound soft magnetic material is by one or more layers magnetically soft alloy band and double faced adhesive tape
Fitting is made, and every layer of magnetically soft alloy band is bonded one layer of double faced adhesive tape；The magnetically soft alloy be amorphous alloy, nanometer crystal alloy or
At least one of sub-nanometer alloy.
2. the composite cores of controllable magnetic property according to claim 1, which is characterized in that the thickness of the double faced adhesive tape
At 15 μm hereinafter, the thickness of the magnetically soft alloy band is at 40 μm or less.
3. the composite cores of controllable magnetic property according to claim 1, which is characterized in that the magnetic core can be by it
The fragmentation of magnetically soft alloy band is handled, and carries out the controllable adjustment of magnetic core performance.
4. the composite cores of controllable magnetic property according to claim 1, which is characterized in that the composite cores can be
Arbitrary shape, including but not limited to circular ring shape, rectangular, C-shaped, E shape, strip, abnormal shape etc..
5. the composite cores of controllable magnetic property according to claim 1, which is characterized in that the composite cores can be used
Dress shield box, surface coated with resins or insulated paint, the winding modes such as insulating paper or empire cloth are protected.
6. the preparation method of the composite cores of described in any item controllable magnetic properties, feature exist according to claim 1~5
In step includes:
(1) it is heat-treated: selecting the combination of suitable magnetically soft alloy band or a variety of bands according to the performance requirement of magnetic core, it will be soft
Magnetic alloy band is heat-treated under the conditions of it is respectively suitable；
(2) it is bonded: double faced adhesive tape being bonded completely with the magnetically soft alloy band after heat treatment, if compound soft magnetic material is sandwich tape
Material design also needs to fit to multilayer magnetically soft alloy band together, and retains the protective film of outermost layer double-sided adhesive, is made band-like
Compound soft magnetic material；
(3) broken magnetic treatment: selecting suitable broken magnetic mold according to the performance requirement of magnetic core, will be obtained band-like multiple in step (2)
It closes soft magnetic materials and carries out broken magnetic treatment, the fragment that full wafer magnetically soft alloy band therein is processed into specific dimensions and shape is uniform
The structure of distribution；
(4) it shears: according to the requirement of core structure and size, compound soft magnetic material obtained in step (3) being cut into specific
The strip material of width or the composite sheet of specific shape；
(5) the band-like compound soft magnetic material sheared in step (4) form forming magnetic core: is wound into required ruler using magnetic core winding machine
Very little magnetic core, or the composite sheet sheared in step (4) is laminated into the magnetic core of required size and structure；
(6) protection is handled: according to the use occasion needs of magnetic core, magnetic core obtained in step (5) being packed into shield box or carries out table
Face coating processing or surface wrap insulating paper or empire cloth etc., carry out protection processing.
7. the preparation method of the composite cores of controllable magnetic property according to claim 6, which is characterized in that the step
(1) the magnetically soft alloy band in is one of amorphous alloy strips, nanometer crystal alloy band or sub-nanometer alloy strip steel rolled stock or several
Kind.
8. the preparation method of the composite cores of controllable magnetic property according to claim 6, which is characterized in that the step
(2) in, if magnetically soft alloy band be it is a variety of, also need first according to the performance requirement of magnetic core carry out magnetically soft alloy band combination set
Meter, then carries out double-sided adhesive fitting again.
9. the preparation method of the composite cores of controllable magnetic property according to claim 6, which is characterized in that the preparation step
It, can broken magnetic treatment according to the performance requirement of magnetic core without step (3) in rapid.
10. the preparation method of the composite cores of controllable magnetic property according to claim 6, which is characterized in that the step
(5) molding magnetic core can have any shape in, including but not limited to circular ring shape, rectangular, C-shaped, E shape, strip, abnormal shape etc..
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|---|---|---|---|---|
| CN113659738A (en) * | 2021-06-30 | 2021-11-16 | 信维通信（江苏）有限公司 | Preparation equipment and preparation process of shielding sheet for wireless charging |
| CN113963883A (en) * | 2021-10-19 | 2022-01-21 | 安徽先锐软磁科技有限公司 | Composite magnetic core with adjustable magnetic performance and preparation method thereof |
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