CN107354389A - A kind of nanometer crystal alloy electromagnetic shielding piece and preparation method, nanometer crystal alloy and screened shielded antanna - Google Patents
A kind of nanometer crystal alloy electromagnetic shielding piece and preparation method, nanometer crystal alloy and screened shielded antanna Download PDFInfo
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Abstract
The present invention relates to a kind of nanometer crystal alloy electromagnetic shielding piece and preparation method, nanometer crystal alloy and screened shielded antanna, the formula of the nanometer crystal alloy to be：Fe100‑d‑e‑f‑g‑z‑mDdEeFhSifBgNizCom；There is high permeability and low loss in the range of frequency of use using piece is electromagnetically shielded made of nanometer crystal alloy；And as NFC near-field communications in use, the requirement to magnetic sheet is in corresponding frequencies, its permeability is relatively low in certain limit, loss.
Description
Technical field
The invention belongs to field of magnetic material, and being related to composite, electromagnetic shielding material, module and its manufacture optimization, it is electric
Gas performance methodology, more particularly to a kind of nanometer crystal alloy electromagnetic shielding piece and preparation method, nanometer crystal alloy and screened shielded antanna.
Background technology
With the quick popularization of mobile phone, the up-downgoing data rate that wireless network is supported improves constantly, and new application is especially
It is that application in terms of data service continues to bring out, mobile phone turns into people's indispensable information terminal at one's side.Increasing people
Wrist-watch, notepad, MP3, bank card are replaced with mobile phone.
Short-range communication NFC (Near Field Communication) technology will allow everything to come true.This skill
Art was proposed that current patronage member has Samsung, Microsoft, Visa etc. 11 by Nokia, Philip and Sony in 2004, and
Its all kinds of member's sum has concentrated world-leading operator, cell phone manufacturer, chip manufacturer, smart card production more than 100
Business, bank and credit card organisations.NFC is to merge to develop on the basis of radio frequency identification (RFID) and interconnection technique
New technology, be a kind of short-distance wireless communication technology standard.It is integrated with Non-contact Media Reader on one chip, non-connect
Touch smart card and point-to-point function, are operated in 13.56MHz frequency range, can be set being established about in the range of 10cm
Connection between standby.
Low cost, high security and the rapid answer time of NFC technique make its advantage in close range communication techniques bright
It is aobvious.For the intelligent mobile phone terminal for possessing NFC function, each metal portion position (such as battery) therein can all pass in wireless signal
Opposing magnetic field is produced when defeated, so as to influence the transmission of wireless signal.Ferrite antifreeze plate is due to in 13.56MHz frequencies
The high magnetic permeability of point and low-loss, turn into main material indispensable in wireless application.Mobile phone realizes the component of NFC function by core
Piece, antenna are formed plus ferrite antifreeze plate, and usual antifreeze plate after antenna combination with being attached on the inner surface of mobile phone shell on the back.
In addition to possessing NFC wireless payment functions, wireless charging technology is also trend of the times, in the future increasing hand
Machine uses wireless charging technology.
Wireless charging technology, also known as induction charging, contactless charging, are derived from caused by wireless power conveying technology
A kind of New-type charge technology.Wireless charging technology is sensed using near field, and being transmitted its energy to by wireless charger needs charging equipment.
Under normal circumstances, the energy of capacitive transmission is very little, this with electrode area is small very big relation.Therefore, in order to meet to
Power level (such as from 5W to 25w) needed for consumer device charging is, it is necessary to increase electrode size and the magnitude of voltage of coupling, specifically
Configuration depending on reality.In order to realize the wireless receiving and dispatching between coupling electrode and meanwhile as far as possible reduce external amount of radiation, it is necessary to
Correctly designed.It should be further understood that and determine correct electrode size, their design, operating voltage, performance number,
Frequency optimum traffic and total size constraint.Generally, preferable frequency range has in 200kHz between 1MHz
The magnitude of voltage of effect coupled zone charges in 800V to mobile phone wireless between 1.52kV.
The wireless charging technology of magnetic coupling principle, closer to the resonance type switching power of routine.Relative to electric field coupling
For conjunction, technical difficulty is smaller.Advantage is obvious, and development speed has comparatively fast formed three larger alliances of influence power at present
Organize WPC, A4WP and PMA.Each possess the up to dozens or even hundreds of company of member.Wherein WPC and PMA is directed to low coverage
From wireless charging technology, the familiar mobile phone wireless charging such as us.And A4WP technological orientation is in remote-wireless energy
Transmission, it is desirable to be able to realize tens centimetres even transmission range of several meters of grades.Wireless charging represents one on charging technique
Secondary major transformation, wireless charging make user break away from the constraint of cable, it is only necessary to which equipment is placed on wireless charging electroplax (charging
Pad) can be carried out charging above.Wireless charging technology has been widely applied to electric toothbrush, electric shaver, radio
The fields such as words, smart mobile phone, electric automobile.
The popular type Galaxy S6 that Samsung mobile phone in March, 2015 announces support wireless charging, then release again S7 and
Note7 products, equally support wireless charging function.
Wireless charging technology developed recently is rapid, but also encounters many technical barriers.Such as improve charge efficiency, reduce into
Originally, effective charging distance is too short.
To obtain higher charge efficiency, influence of the electromagnetic field to mobile phone is, it is necessary to using battery when charging is reduced or eliminated
Shielding piece is shielded.The effect for being electromagnetically shielded piece is exactly to completely cut off electromagnetic wave, prevents the materials such as metal from absorbing transmitting end equipment hair
The electromagnetic wave that goes out simultaneously produces the magnetic field of opposite direction.In mobile phone wireless charges receiving terminal, if not being electromagnetically shielded piece, wireless charging
Electric equipment can not just complete work of closely charging., must in mobile phone due to the special structure of mobile phone by taking smart mobile phone as an example
One battery must be installed, when battery is passed through in the magnetic field that transmitting coil emits, the metal inside battery will produce sensing
Electric current, generally we this is called " vortex ", this be vortexed can produce one it is opposite with magnetic direction caused by transmitting coil
Magnetic field, balance out the magnetic field of transmitting coil formation so that induced voltage that receiving coil receives declines；And the vortex meeting
It is transformed into heat so that battery of mobile phone is very warm.Therefore, just must be in electric power acceptance line in order to realize being wirelessly transferred for mobile phone
The device of one " every metal " is placed between circle and battery of mobile phone, stops the magnetic line of force, avoids the magnetic line of force from reaching in battery.Conventional
Technology is to do this " every metal " device using the ferrite of a high permeability.But later studies have found that, due to Qi
Between 100-200KHz, this section uses amorphous, is nanocrystalline as electromagnetic shielding piece charge frequency scope in rechargeable standard
Effect be better than ferrite.Therefore the receiving terminal of Samsung S6 wireless chargings just employs the amorphous electromagnetic shielding of Amotech offers
Chip technology, charge efficiency reach more than 75%.
Because wireless charging and NFC wireless payment functions are required to use magnetic shield piece, and its difference is exactly using frequency
Rate is different.And common magnetic shielding materials are to have inhibitory action to the electromagnetic interference of a certain frequency range now, and can not be very big
In the range of can play good effectiveness.Therefore it is badly in need of developing a kind of magnetic material and corresponding material is electric
The design of performance optimization.
The content of the invention
The shortcomings that in order to overcome above-mentioned prior art, it is an object of the invention to provide it is a kind of to electromagnetic interference without drawing up
Effect, can play good electric screwdriver shielding action nanometer crystal alloy electromagnetic shielding piece and preparation method, nanometer crystal alloy and
Screened shielded antanna.
To reach above-mentioned purpose, the present invention uses following technical scheme, a kind of nanometer crystal alloy, and the nanometer crystal alloy leads to
Formula is：
Fe100-d-e-f-g-z-mDdEeFhSifBgNizCom
In above-mentioned formula, D represents be selected from least one of Cu and Au element, E represent to be selected from V, Ta, Mo, Mn, Cr,
At least one of Nb elements, F are represented selected from least one of P, C, Se element；D, e, h, f, g, z and m are to meet relation respectively
Formula 0.01at%≤d≤3at%, 0.01at%≤e≤5at%, 0.01at%≤h≤3at%, 0at%≤f≤25at%,
0at%≤g≤20at%, 0at%≤z≤40at%, 0at%≤m≤40at%, 10at%≤d+e+h+f+g+z+m≤
60at% number.
The content of the D elements is 0.5at%≤d≤1.5at%.
The content of the E elements is 2at%≤e≤4at%.
The content of the F elements is 1at%≤h≤2at%.
The content of the Si elements is 10at%≤f≤18at%, and the content of the B is 6at%≤g≤12at%.
The content of described Ni elements is 0.2at%≤z≤20at%, and the content of the Co elements is 0.4at%≤m
≤ 25at%.
One kind electromagnetic shielding piece, described nanometer crystal alloy is pressed into individual layer or electromagnetic shielding is made in the laminate of multilayer
Piece.
A kind of preparation method of multilayer electromagnetic shielding piece, is followed the steps below：
(1) preparatory stage of electromagnetic wave shielding sheet, is prepared：Nanocrystalline strip needed for preparing, production equipment, adhesive gel,
Graphite heat radiation fin；
(2), it is heat-treated：The nanocrystalline strip that step (1) prepares is wound, afterwards by the nanocrystalline strip of winding
It is placed in heat-treatment furnace and is heat-treated；
(3) one side glue, is covered：The nanocrystalline strip being heat-treated in step (2) is subjected to single-side coating；
(4), magnetic sheet graphical treatment：Using laser cutting or chemical etching to the nanocrystalline band after being handled in step (3)
Material processing；
(5) glue, is covered：The strip surface for not covering glue after step (4) graphical treatment carries out covering glue；
(6), adhesive lamination：The band glue one side of the nanocrystalline strip after glue will be covered in step (5) fit to another band and do not have
There is the surface of glue, it is desirable to be bonded the number of plies into needs, then carry out lamination process；
(7), by the nanocrystalline strip after adhesive lamination in step (6), the size of magnetic sheet requires to be punched out as desired,
Obtain the magnetic sheet of desired size；
(8), the ceramics after being punched in step (7) is bonded with graphite flake, coil, obtains final electromagnetic shielding piece
Component.
Integral antenna with electromagnetic shielding piece, including the upper roller and bottom roller being parallel to each other, be located at bottom roller and
Multilayer electromagnetic shielding piece, NFC coils and WPC lines between described upper roller and multilayer electromagnetic shielding piece are provided between upper roller
Circle, pad is provided between described bottom roller and multilayer electromagnetic shielding piece.
The beneficial effects of the invention are as follows：
1st, there is high permeability and low in the range of frequency of use using being electromagnetically shielded piece made of nanometer crystal alloy
Loss；And as NFC near-field communications in use, the requirement to magnetic sheet is in corresponding frequencies, its permeability is in certain limit, damage
Consume relatively low.
2nd, the antenna supported by being electromagnetically shielded piece, frequency range is wide, can take into account wireless charging and NFC wireless payments simultaneously
Frequency range, and NFC performance requirements can be directed to and carry out performance matching design.
3rd, the function of composite can be met using a kind of magnetic material, wanted if module u '/Ls/Fr values go beyond the scope
Ask, using module electric property optimization design, make module, magnetic sheet u '/Ls/Fr values meet the function of possessing different requirements, cost
It is cheap.
3rd, coordinating exclusive figure, stable performance, magnetic sheet thickness is thinner, charging to antenna modules electric property optimization design
Efficiency is improved.
Brief description of the drawings
Fig. 1 is the structural representation of antenna；
Fig. 2 is the flow chart of the preparation method of multilayer electromagnetic shielding piece.
In figure：1. upper roller；2. bottom roller；3. multilayer screen piece；4.NFC coils；5.WPC coils；6. pad.
Embodiment
The present invention is described in detail with reference to the accompanying drawings and examples.
In the description of the invention, it is to be understood that term " " center ", " on ", " under ", "front", "rear", " left side ",
The orientation or position relationship of the instruction such as " right side ", " vertical ", " level ", " top ", " bottom ", " interior ", " outer " are based on shown in the drawings
Orientation or position relationship, be for only for ease of the description present invention and simplify description, rather than instruction or imply signified device or
Element must have specific orientation, with specific azimuth configuration and operation, therefore be not considered as limiting the invention.
Term " first ", " second " be only used for describe purpose, and it is not intended that instruction or imply relative importance or
The implicit quantity for indicating indicated technical characteristic.Thus, " first " is defined, the feature of " second " can be expressed or imply
Ground includes one or more this feature.In the description of the invention, unless otherwise indicated, " multiple " be meant that two or
Two or more.
Embodiment 1
A kind of nanometer crystal alloy, the formula of the nanometer crystal alloy are：
Fe100-d-e-f-g-z-mDdEeFhSifBgNizCom
In above-mentioned formula, D represents be selected from least one of Cu and Au element, E represent to be selected from V, Ta, Mo, Mn, Cr,
At least one of Nb elements, F are represented selected from least one of P, C, Se element；D, e, h, f, g, z and m are to meet relation respectively
Formula 0.01at%≤d≤3at%, 0.01at%≤e≤5at%, 0.01at%≤h≤3at%, 0at%≤f≤25at%,
0at%≤g≤20at%, 0 at%≤z≤40at%, 0at%≤m≤40at%, 10at%≤d+e+h+f+g+z+m≤
60at% number.
Particularly in above-mentioned mathematical expression 1：
D elements are used for the forming core of crystal grain, prevent the coarsening of crystalline particle, are damaged so as to improve the magnetic conductivity of alloy and reduce
Consumption.If the content of D elements is very few, it is difficult to the effect for obtaining the coarsening for suppressing crystal grain.On the contrary, if the content of D elements is excessive,
Can then magnetic be caused to deteriorate.It is therefore preferred that the content of D elements is in the range of 0.01 to 3at%, it is highly preferred that 0.5
To 1.5at% scope.
E elements are inhibited to growing up for crystal grain, show magnetically to reduce magnetostriction, so as to improve magnetic conductance
Rate.It is preferred that the content of E elements is in the range of 0.01 to 5at%, it is highly preferred that in 2 to 4at% scope.
F elements play raising glass forming ability, and the effect for promoting amorphous phase to be formed, preferably the content of F elements is 0.01
To 3at%, it is highly preferred that in 1 to 2at% scope.
Si and B is decrystallized element, for improving the amorphous formation ability of alloy.Si content is preferably 0 to 25at%
In the range of, it is preferable that in 5 to 20at% scope, it is highly preferred that in 10 to 18at% scope.B content is preferably 0
To 20at%, it is preferable that in 5 to 15at% scope, it is highly preferred that in 6 to 12at% scope.
Ni and Co is ferromagnetic element, for improving Induced Anisotropy, improves the magnetic-field heat treatment effect of alloy,
Ni and Co content can not be too high, too high to reduce saturation induction density, and therefore, z, m constituent content are 0 to 40at%'s
In the range of, it is preferable that z is in 0.1-30at, and m is in 0.3-35at%, it is highly preferred that z, in 0.2-20at%, m is in 0.4-25at%.
It is preferred that total content of D, E, F, Si, B, Ni and Co element is in the range of 10 to 60at%.
It is preferred that nanocrystalline structure is as follows：Make particle diameter be 5 to 25nm crystal grain in alloy structure shared volume ratio with 60 to
Structure existing for 90at% scope.
And Fe-Cu-Nb-P-Si-B-Co-Ni alloys can be used as to the Fe base nanometers used in above-mentioned thin magnetic plate
Peritectic alloy, in this case, Fe are preferably 70~80at%, Si and B's and preferably 15~25at%, Cu and Nb's and preferred
It is preferably that 1~2%, Ni and Co is preferably 0.2~10at% for 2~5at%, P.This compositing range can make with band shape
Non-crystaline amorphous metal made of state is easily separated out as nanocrystal by follow-up heat treatment.
It is that specific several formulas of the nanometer crystal alloy are received below：
Fe52.1Cu0.5V4P1Si10B12Ni20Co0.4
Or Fe45.3Au1.5Ta2C2Si18B6Ni0.2Co25；
Or Fe49.5Cu1Mn3Se1.5Si14B8Ni10Co13；
Or Fe49.5Au1Mn3Se1.5Si14B8Ni10Co13；
Or Fe40Cu3Cr1C3Si1B20Ni1Co31；
The specific preparation method for the electromagnetic shielding piece that a kind of several nanometer crystal alloys is pressed into is as follows more than：
The preparation method of kind multilayer electromagnetic shielding piece as shown in Figure 2, is followed the steps below：
(1) preparatory stage of electromagnetic wave shielding sheet, is prepared：Nanocrystalline strip needed for preparing, prepare relevant production units,
Prepare adhesive gel (one side glue, double faced adhesive tape, print tape), prepare graphite heat radiation fin.
(2), it is heat-treated：Nanocrystalline strip is wound to certain size as requested.Afterwards by the nanocrystalline of winding
Band is placed in heat-treatment furnace and is heat-treated, and specific handling process method is in patent《A kind of amorphous in magnetic screen or
Nanocrystalline material heat treatment method》In be described in detail.
(3) one side glue, is covered：The band being heat-treated is subjected to single-side coating, the roll-to-roll adhesive process that covers can be used to enter
Row covers glue.Diaphragm with one side glue is attached to the surface of heat treated band, the pressing former material as next step.
(4), magnetic sheet graphical treatment：Using laser cutting or chemical etching handling process, illustrate and see《It is a kind of wireless
The preparation method and battery shielding piece of charging electromagnetic shielding piece》.
Due to strip surface microstructure to subsequent charge when magnetic sheet eddy-current loss and charge efficiency influence very
Greatly.We are by controlling the shape of particle in magnetic sheet, size, the size in gap, it is possible to the whirlpool of magnetic sheet when directly control is charged
Stream loss, and then improve charge efficiency.
(5) glue, is covered：The strip surface for not covering glue after magnetic sheet graphical treatment in step (4) carries out covering glue.Cover adhesive process
To print coating method, by designing shape, the size of colloid, the method by printing coating, the magnetic after graphical treatment
Piece surface carries out covering glue.
(6), adhesive lamination：Step (5) is covered to band band glue in the band of glue, and simultaneously fitting to another band does not have glue
Surface, so fitting into the number of plies of needs, then carries out lamination process as requested.The magnetic sheet posted is laminated, obtained
To ultra-thin magnetic sheet.
(7), the electromagnetic plate that step (6) obtains is punched out according to required magnetic sheet according to size requirement,
Seek the magnetic sheet of size.
(8), the nanocrystalline and graphite flake shown in step (7), coil are bonded, obtain final electromagnetic shielding piece group
Part.
(9), u '/Ls/Fr values for two kinds of difference in functionalitys of WPC and NFC, which exceed, requires magnetic sheet finished product, and we take difference
Breaking treatment process, its u '/Ls/Fr values is met the function of possessing different requirements.
A kind of electromagnetic shielding piece WPC＆NFC integral antennas are made by being electromagnetically shielded piece made from the above method, specifically
Structure include the upper roller 1 and bottom roller 2 that are parallel to each other as shown in Figure 1, be located between bottom roller 1 and upper roller 1 be provided with it is more
Layer electromagnetic shielding piece 3, NFC coils 4 and WPC coils 5 between described upper roller 1 and multilayer electromagnetic shielding piece 3, described lower rolling
Pad 6 is provided between wheel 2 and multilayer electromagnetic shielding piece 3.
Illustrated below according to the performance that piece and then the antenna formed are electromagnetically shielded made of different nanometer crystal alloys
Explanation：
Embodiment 1
It is using nanocrystalline formula：1k107, composition Fe66.5Cu1Nb1Mo1Si14.5B8Co5Ni3(atomic ratio)；
Table 1
Table 2
As shown in table 1, it is product module reset condition electric property, in 200kHz, for the nanocrystalline of WPC functions
Magnetic sheet unit inductance is slightly above WPC functional requirement inductance；When NFC modules are tested, NFC module Fr values will less than NFC specifications
Ask.
As shown in table 2, the NFC and WPC nanocrystalline magnetic blade units respectively obtained using the adjustment of broken magnetic optimize technique.Simultaneously
Nanocrystalline magnetic sheet for WPC/NFC functions meets module to its electrical performance demands.
Meanwhile the difference of NFC function magnetic sheet and WPC function magnetic sheets stacks performance of time ordered pair finally after coil is compound and omited
There is difference, can be adjusted according to different performance requirement.
Embodiment 2
It is using nanocrystalline formula：1k10, composition Fe52.1Cu0.5V4P1Si10B12Ni20Co0.4(atomic ratio)；
Table 1
Table 2
As shown in table 1, it is product module reset condition electric property, in 200kHz, for the nanocrystalline of WPC functions
Magnetic sheet unit inductance is slightly above WPC functional requirement inductance；When NFC modules are tested, NFC module Fr values will less than NFC specifications
Ask.
As shown in table 2, the NFC and WPC nanocrystalline magnetic blade units respectively obtained using the adjustment of broken magnetic optimize technique.Simultaneously
Nanocrystalline magnetic sheet for WPC/NFC functions meets module to its electrical performance demands.
Meanwhile the difference of NFC function magnetic sheet and WPC function magnetic sheets stacks performance of time ordered pair finally after coil is compound and omited
There is difference, can be adjusted according to different performance requirement.
Embodiment 3
It is using nanocrystalline formula：1k113, composition Fe49.5Au1Mn3Se1.5Si14B8Ni10Co13(atomic ratio)；
Table 1
Table 2
As shown in table 1, it is product module reset condition electric property, in 200kHz, for the nanocrystalline of WPC functions
Magnetic sheet unit inductance is slightly above WPC functional requirement inductance；When NFC modules are tested, NFC module Fr values will less than NFC specifications
Ask.
As shown in table 2, the NFC and WPC nanocrystalline magnetic blade units respectively obtained using the adjustment of broken magnetic optimize technique.Simultaneously
Nanocrystalline magnetic sheet for WPC/NFC functions meets module to its electrical performance demands.
Meanwhile the difference of NFC function magnetic sheet and WPC function magnetic sheets stacks performance of time ordered pair finally after coil is compound and omited
There is difference, can be adjusted according to different performance requirement
Above example be only to the present invention for example, do not form the limitation to protection scope of the present invention,
It is every to be belonged to the same or analogous design of the present invention within protection scope of the present invention.
Claims (9)
1. a kind of nanometer crystal alloy, it is characterised in that the formula of the nanometer crystal alloy is：
Fe100-d-e-f-g-z-mDdEeFhSifBgNizCom
In above-mentioned formula, D is represented to be selected from least one of Cu and Au element, and E is represented in V, Ta, Mo, Mn, Cr, Nb
At least one element, F represented selected from least one of P, C, Se element；D, e, h, f, g, z and m are to meet relational expression respectively
0.01at%≤d≤3at%, 0.01at%≤e≤5at%, 0.01at%≤h≤3at%, 0at%≤f≤25at%,
0at%≤g≤20at%, 0at%≤z≤40at%, 0at%≤m≤40at%, 10at%≤d+e+h+f+g+z+m≤
60at% number.
A kind of 2. nanometer crystal alloy according to claim 1, it is characterised in that the content of the D elements be 0.5at%≤
D≤1.5at%.
3. a kind of nanometer crystal alloy according to claim 1, it is characterised in that the content of the E elements is 2at%≤e
≤ 4at%.
4. a kind of nanometer crystal alloy according to claim 1, it is characterised in that the content of the F elements is 1at%≤h
≤ 2at%.
A kind of 5. nanometer crystal alloy according to claim 1, it is characterised in that the content of the Si elements be 10at%≤
F≤18at%, the B content are 6at%≤g≤12at%.
6. a kind of nanometer crystal alloy according to claim 1, it is characterised in that the content of described Ni elements is
0.2at%≤z≤20at%, the content of the Co elements is 0.4at%≤m≤25at%.
7. one kind electromagnetic shielding piece, it is characterised in that the nanometer crystal alloy described in claim 1 is pressed into individual layer or multilayer
Electromagnetic shielding piece is made in laminate.
8. electromagnetic shielding piece according to claim 7 provides a kind of preparation method of multilayer electromagnetic shielding piece, its feature
It is, follows the steps below：
(1) preparatory stage of electromagnetic wave shielding sheet, is prepared：Nanocrystalline strip needed for preparing, production equipment, adhesive gel, graphite
Fin；
(2), it is heat-treated：The nanocrystalline strip that step (1) prepares is wound, is afterwards placed on the nanocrystalline strip of winding
It is heat-treated in heat-treatment furnace；
(3) one side glue, is covered：The nanocrystalline strip being heat-treated in step (2) is subjected to single-side coating；
(4), magnetic sheet graphical treatment：At nanocrystalline strip after being handled using laser cutting or chemical etching are middle to step (3)
Reason；
(5) glue, is covered：The strip surface for not covering glue after step (4) graphical treatment carries out covering glue；
(6), adhesive lamination：The band glue one side of the nanocrystalline strip after glue will be covered in step (5) fitting to another band does not have glue
Surface, it is desirable to be bonded the number of plies into needs, then carry out lamination process；
(7), by the nanocrystalline strip after adhesive lamination in step (6), the size of magnetic sheet requires to be punched out as desired, obtains
The magnetic sheet of desired size；
(8), the ceramics after being punched in step (7) is bonded with graphite flake, coil, obtains final electromagnetic shielding piece group
Part.
9. the integral antenna with electromagnetic shielding piece made of electromagnetic shielding piece according to claim 7, its feature exist
In, including the upper roller (1) and bottom roller (2) being parallel to each other, it is located between bottom roller (1) and upper roller (1) and is provided with multilayer electricity
Magnetic screen piece (3), NFC coils (4) and WPC coils (5) between described upper roller (1) and multilayer electromagnetic shielding piece (3) are described
Bottom roller (2) and multilayer electromagnetic shielding piece (3) between be provided with pad (6).
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| CN201710713390.0A CN107354389B (en) | 2017-08-18 | 2017-08-18 | Nanocrystalline alloy electromagnetic shielding sheet, preparation method thereof, nanocrystalline alloy and shielding antenna |
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| CN113388721A (en) * | 2021-06-12 | 2021-09-14 | 深圳市驭能科技有限公司 | Magnetic field shielding sheet and preparation method and application thereof |
| WO2022134622A1 (en) * | 2020-12-24 | 2022-06-30 | 深圳市驭能科技有限公司 | Nanocrystalline magnetically-conductive sheet for wireless power charging and near field communication, and manufacturing method therefor |
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