CN109817442A - A kind of nanocrystalline antifreeze plate and preparation method thereof - Google Patents
A kind of nanocrystalline antifreeze plate and preparation method thereof Download PDFInfo
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Abstract
The present invention relates to a kind of nanocrystalline antifreeze plate and preparation method thereof, the preparation method of the nanocrystalline antifreeze plate includes the following steps: that (1) takes nanocrystalline strip, and the typical composition of nanocrystalline strip is FevSiwNbxByCuz, wherein v=71-76%, w=11-15%, x=1.5-3.5%, y=7-10%, z=0.5-2.5%；The thickness in monolayer of nanocrystalline strip is 16-25 μm；(2) nanocrystalline strip is successively carried out under nitrogen protection being heat-treated for the first time and second is heat-treated；(3) nanocrystalline strip after being heat-treated second carries out cooling, overlay film and is bonded, the semi-finished product to be die cut after obtaining 2 layers of nanocrystalline strips fitting；(4) semi-finished product to be die cut are die cut, then are assembled with coil, obtain nanocrystalline antifreeze plate.The nanocrystalline antifreeze plate that the present invention obtains can realize thinned effect, meet the lightening development trend of smart phone.
Description
Technical field
The present invention relates to wireless charging technology, in particular to a kind of wireless charging nanocrystalline antifreeze plate and its preparation side
Method.
Background technique
In recent years, wireless charging technology develops at an amazing speed.Especially with smart phone wireless charging function
It gradually popularizes, so that people also increasingly focus the skill of wireless charging field while enjoyment wireless charging brings convenience
Art development.Wireless charging technology is the charging technique that electric energy is transmitted to receiving end using inductive coupling from transmitting terminal.In early stage
Product in, soft magnetic ferrite product is by lower loss and cheap cost, in wireless technology as main components
It is widely applied.But as wireless charging develops toward high-power direction, the defect of ferritic low saturation induction density Bs
Gradually show, ferrite is caused to be unable to satisfy high-power charge requirement.It is nanocrystalline good because having under this development trend
Soft magnet performance and high saturated magnetic induction and obtain the extensive concern of people.
A kind of wireless charging antifreeze plate structure is disclosed in patent CN108231381A.The antifreeze plate structure is by successively layer
The first folded magnetosphere and the second magnetosphere are constituted.First magnetospheric permeability range is 300~1200, and second is magnetospheric
Permeability range is 1800~20000.Each magnetosphere is made of multi-layer nano crystalline substance and bonded adhesives, the antifreeze plate of this structure
Thickness is about 200 μm.In addition, proposing to need to carry out fragmentation processing to nanocrystalline in the second magnetosphere in patent.By this
The scheme of patent disclosure can obtain the good antifreeze plate of heating conduction.Patent CN107610923A discloses a kind of wireless charging
Electricity antifreeze plate preparation process specifically includes strip coil around, heat treatment, single-side coating, graphical treatment, insulation processing, again
Cover the techniques such as glue, fitting, lamination, punching.Wherein, the heat treatment condition of band is 100 DEG C~200 DEG C 1 minute~3 points of heat preservations
Clock.In order to obtain higher charge efficiency, which has carried out insulation processing to strip surface, i.e., using spray insulation agent or
Pass through the processing methods such as chemical surface treatment.In patent CN108695930A, pass through the combination of outer ring magnetic sheet and center magnetic sheet
Mode has prepared a kind of wireless charging mould group shielding piece and wireless charging mould group.In this configuration, outer ring magnetic sheet is equipped with
Hole compatible with center magnetic sheet, the other end of center magnetic sheet protrude from outer ring magnetic sheet.Outer ring magnetic sheet includes at least one layer first
Magnetic layer, center magnetic sheet include the second magnetic layer of at least two-layer laminate.Wherein, the second magnetic layer of center magnetic sheet is fragmentation
Nanocrystalline strip, fragmentation amorphous band either fragmentation soft magnetic metal band.
It is nanocrystalline to rely on its excellent soft magnet performance, gradually it is applied in wireless charging antifreeze plate.Currently, in order into
One step improves the performance of nanocrystalline antifreeze plate, it usually needs carries out insulation processing to nanocrystalline strip, process is complicated, and not easily-controllable
System.Another mode then needs accurately to control antifreeze plate structure, and structure is complicated, and needs broken to nanocrystalline progress
Pieceization processing, is easy to cause later product performance unstable.As the development of electronic information field, especially smart phone are frivolous
The development trend of change proposes lightening new demand with antifreeze plate to wireless charging.
Summary of the invention
The technical problems to be solved by the present invention are: provide a kind of nanocrystalline antifreeze plate and preparation method thereof, can avoid because
Broken magnetization treatment bring material property wild effect.
In order to solve the above-mentioned technical problem, the technical solution adopted by the present invention are as follows:
A kind of preparation method of nanocrystalline antifreeze plate, includes the following steps:
(1) nanocrystalline strip is taken, the typical composition of the nanocrystalline strip is FevSiwNbxByCuz, wherein v=71-
76%, w=11-15%, x=1.5-3.5%, y=7-10%, z=0.5-2.5%；The thickness in monolayer of the nanocrystalline strip
It is 16-25 μm；
(2) nanocrystalline strip is successively carried out under conditions of nitrogen protection at heat treatment for the first time and second of heat
Reason, first time heat treatment specifically: according to heating rate be 10-20 DEG C/min, by nanocrystalline strip from room temperature to
430-450 DEG C, and keep the temperature 20-40min；Described second is heat-treated specifically: and it according to heating rate is 10-20 DEG C/min, it will
Nanocrystalline strip after being heat-treated for the first time is warming up to 550-560 DEG C from 430-450 DEG C, and keeps the temperature 100-140min；
(3) nanocrystalline strip after being heat-treated second cools down, then by 2 layers of nanocrystalline strip after cooling according to
Secondary progress overlay film and bonding process, the semi-finished product to be die cut after obtaining 2 layers of nanocrystalline strip fitting；
(4) semi-finished product to be die cut are die cut, then are assembled with coil, obtain the nanocrystalline antifreeze plate.
A kind of nanocrystalline antifreeze plate is prepared using the preparation method of above-mentioned nanocrystalline antifreeze plate.
The beneficial effects of the present invention are:
(1) preparation method of nanocrystalline antifreeze plate of the invention successively carries out above-mentioned nanocrystalline strip at heat for the first time
Reason and second is heat-treated, the band after being heat-treated, and using overlay film, fitting, cross cutting, prepares the nanometer
Brilliant antifreeze plate；The laminated construction for the nanocrystalline antifreeze plate prepared only includes nanocrystalline two layers, can be realized thinned effect, is met
The lightening development trend of smart phone；
(2) compared with existing preparation process, preparation method of the invention have simple process, volume production easy to accomplish it is excellent
Point；Also, without carrying out broken magnetization treatment to nanocrystalline material in preparation method of the invention, so as to avoid because of broken magnetization
Handle bring material property wild effect；
(3) it can successfully prepare wireless charging of the overall thickness no more than 80 μm using preparation method of the invention and use and surpass
Thin nanocrystalline antifreeze plate, and can be realized under 5W charge efficiency test platform the charge efficiency not less than 75%.
Detailed description of the invention
Fig. 1 is the charge efficiency figure of the nanocrystalline antifreeze plate for preparing under 5W test platform in the embodiment of the present invention 1.
Fig. 2 is the charge efficiency figure of the nanocrystalline antifreeze plate for preparing under 5W test platform in the embodiment of the present invention 2.
Charge efficiency figure of the nanocrystalline antifreeze plate prepared in Fig. 3 embodiment of the present invention 3 under 5W test platform.
Specific embodiment
To explain the technical content, the achieved purpose and the effect of the present invention in detail, below in conjunction with embodiment and cooperate attached
Figure is explained.
The most critical design of the present invention is: designing above-mentioned preparation process, obtaining laminated construction only includes nanocrystalline two layers
Nanocrystalline antifreeze plate.
The present invention provides a kind of preparation method of nanocrystalline antifreeze plate, includes the following steps:
(1) nanocrystalline strip is taken, the typical composition of the nanocrystalline strip is FevSiwNbxByCuz, wherein v=71-
76%, w=11-15%, x=1.5-3.5%, y=7-10%, z=0.5-2.5%；The thickness in monolayer of the nanocrystalline strip
It is 16-25 μm；
(2) nanocrystalline strip is successively carried out under conditions of nitrogen protection at heat treatment for the first time and second of heat
Reason, first time heat treatment specifically: according to heating rate be 10-20 DEG C/min, by nanocrystalline strip from room temperature to
430-450 DEG C, and keep the temperature 20-40min；Described second is heat-treated specifically: and it according to heating rate is 10-20 DEG C/min, it will
Nanocrystalline strip after being heat-treated for the first time is warming up to 550-560 DEG C from 430-450 DEG C, and keeps the temperature 100-140min；
(3) nanocrystalline strip after being heat-treated second cools down, then by 2 layers of nanocrystalline strip after cooling according to
Secondary progress overlay film and bonding process, the semi-finished product to be die cut after obtaining 2 layers of nanocrystalline strip fitting；
(4) semi-finished product to be die cut are die cut, then are assembled with coil, obtain the nanocrystalline antifreeze plate.
As can be seen from the above description, the beneficial effects of the present invention are:
(1) preparation method of nanocrystalline antifreeze plate of the invention successively carries out above-mentioned nanocrystalline strip at heat for the first time
Reason and second is heat-treated, the band after being heat-treated, and using overlay film, fitting, cross cutting, prepares the nanometer
Brilliant antifreeze plate；The laminated construction for the nanocrystalline antifreeze plate prepared only includes nanocrystalline two layers, can be realized thinned effect, is met
The lightening development trend of smart phone；
(2) compared with existing preparation process, preparation method of the invention have simple process, volume production easy to accomplish it is excellent
Point；Also, without carrying out broken magnetization treatment to nanocrystalline material in preparation method of the invention, so as to avoid because of broken magnetization
Handle bring material property wild effect；
(3) it can successfully prepare wireless charging of the overall thickness no more than 80 μm using preparation method of the invention and use and surpass
Thin nanocrystalline antifreeze plate, and can be realized under 5W charge efficiency test platform the charge efficiency not less than 75%.
Further, the nanocrystalline strip is commercial nanocrystalline strip, in the nanocrystalline strip, v=73.5%, w
=13.5%, x=3%, y=9%, z=1%.
Further, the glue material used in overlay film and bonding process with a thickness of 3-10 μm.
Further, the actual conditions kept the temperature in the first time heat treatment are as follows: 30min is kept the temperature under the conditions of 430-450 DEG C.
Further, the actual conditions kept the temperature in second of the heat treatment are as follows: kept the temperature under the conditions of 550-560 DEG C
120min。
Further, in step (3), the nanocrystalline strip after second is heat-treated cools to 20-30 DEG C with the furnace.
Further, the overall thickness of the nanocrystalline antifreeze plate is no more than 80 μm.
In view of the concrete application scene of wireless charging, for the design of specific process parameter, due to the raising of material Bs
Facilitate the promotion of antifreeze plate wireless charging efficiency.This is that material heat treatment process of the present invention designs a side in need of consideration
Face.Meanwhile heat treatment process of the invention is primarily to reduce the loss of material.Therefore, in order to guarantee ultrathin nanometer crystalline substance every
Magnetic sheet has excellent charge efficiency, and the Bs for improving material is helpful to the promotion of charge efficiency, concurrently, is considered as at first
Be come up by the design of heat treatment process parameter as far as possible reduce material loss.That is, specific heat treatment work of the invention
The design of skill parameter is the purpose of the raising successively based on the loss and material Bs for reducing material as far as possible and the design that carries out.
Based on above-mentioned, in terms of the Bs for improving material, the present invention nanocrystalline strip is successively carried out first time it is hot at
On the one hand reason and second of heat treatment, above-mentioned two-step thermal processing enough discharge the internal stress introduced in original tape material preparation process, reduce
Material loss；On the other hand, by reducing heat treatment step, (Fe-B phase is a kind of Hard Magnetic for the precipitation of Fe-B phase in inhibition material
Material can deteriorate the soft magnet performance of material), achieve the purpose that promote Bs.
In addition, the selection of first time heat treatment parameter is the nucleation point in order to increase nanocrystalline material, to refine crystal grain
Size optimizes nano-crystal soft-magnetic performance.The selection of heat treatment process parameter of the invention is to reduce material loss, inhibit
Fe-B phase.For amorphous or nanocrystalline strip, heat treatment process parameter is different, influences on the performance of material huge.This
Kind material apparent can embody the sensibility of heat treatment parameter in actual production.Such as heat treatment process, temperature
Degree is consistent, but Time Inconsistency, and the band performance difference after heat treatment is also very big.In actual production, if the time controls
It goes wrong, will lead to material property and deteriorate and scrap.
In addition, the present invention in the preparation process of antifreeze plate, eliminates material fragment chemical industry sequence, to reduce antifreeze plate
Magnetic flux leakage, realize charge efficiency promotion and thickness be thinned.Compared with traditional fragmentation technique, the fragmentation of traditional handicraft
There are different degrees of leakage fields, need multi-layer stacks arbitrarily to guarantee charge efficiency and magnetism isolating effect, to increase antifreeze plate
Thickness.
Embodiment 1
Select commercial nanocrystalline strip FeSiNbBCu, typical composition Fe73.5Si13.5Nb3B9Cu1, single layer thickness of strip
It is 16 μm.Band is put into heat-treatment furnace, with 10 DEG C/min of heating rate, from room temperature to 450 DEG C, and keeps the temperature 30
Minute.Then with 20 DEG C/min of heating rate, it is warming up to 560 DEG C from 450 DEG C, and keeps the temperature 120 minutes.After heat preservation, band
Material cools to room temperature with the furnace.
It selects without substrate or there is substrate class glue to carry out the process such as overlay film, fitting to the band after heat treatment.Wherein,
The nanocrystalline number of plies of fitting is 2 layers, and selecting the bondline thickness range of glue material is 3 μm~10 μm.Band after fitting is subjected to mould
It cuts processing and prepares required antifreeze plate, combine to obtain wireless charging mould group with charge coil, that is, obtain the nanometer of the present embodiment
Brilliant antifreeze plate.
Under the test condition of 200kHz, 1V, test result is as follows for mould group:
(1) Ls=8.76 μ H；
(2) Rs=599m Ω.
Fig. 1 is the charge efficiency figure implemented under 1 5W test platform, it can be seen from the figure that with charging current by
It gradually increases, the charge efficiency of mould group steps up, then slowly decline.When electric current is 0.6A, charge efficiency highest, Neng Gouda
To 77.95%.When charging current reaches 1A, the charge efficiency of mould group is 75.88%.It is prepared using this patent scheme super
Thin nanocrystalline antifreeze plate can be while meeting ultrathin, moreover it is possible to keep excellent charging performance.
Embodiment 2
Select commercial nanocrystalline strip FeSiNbBCu, typical composition Fe73.5Si13.5Nb3B9Cu1, single layer thickness of strip
It is 25 μm.Band is put into heat-treatment furnace, with 20 DEG C/min of heating rate, from room temperature to 430 DEG C, and keeps the temperature 30
Minute.Then with 10 DEG C/min of heating rate, it is warming up to 550 DEG C from 430 DEG C, and keeps the temperature 120 minutes.After heat preservation, band
Material cools to room temperature with the furnace.
It selects without substrate or there is substrate class glue to carry out the process such as overlay film, fitting to the band after heat treatment.Wherein,
The nanocrystalline number of plies of fitting is 2 layers, and selecting the bondline thickness range of glue material is 3 μm~10 μm.Band after fitting is subjected to mould
It cuts processing and prepares required antifreeze plate, combine to obtain wireless charging mould group with charge coil, that is, obtain the nanometer of the present embodiment
Brilliant antifreeze plate.
Under the test condition of 200kHz, 1V, test result is as follows for mould group:
(1) Ls=8.76 μ H；
(2) Rs=601m Ω.
Fig. 2 is the charge efficiency figure under the 5W test platform of embodiment 2, it can be seen from the figure that with charging current
It is gradually increased, the charge efficiency of mould group also steps up.When further increase charging current, mould group charge efficiency therewith slowly under
Drop.When electric current is 0.6A, charge efficiency highest can reach 77.95%.When charging current reaches 1A, the charging of mould group
Efficiency is 75.91%.Therefore, the ultrathin nanometer crystalline substance antifreeze plate prepared using this patent scheme can meet the same of ultrathin
When, moreover it is possible to keep excellent charging performance.
Embodiment 3
Select commercial nanocrystalline strip FeSiNbBCu, typical composition Fe73.5Si13.5Nb3B9Cu1, single layer thickness of strip
It is 25 μm.Band is put into heat-treatment furnace, with 15 DEG C/min of heating rate, from room temperature to 440 DEG C, and keeps the temperature 30
Minute.Then with 15 DEG C/min of heating rate, it is warming up to 555 DEG C from 440 DEG C, and keeps the temperature 120 minutes.After heat preservation, band
Material cools to room temperature with the furnace.
It selects without substrate or there is substrate class glue to carry out the process such as overlay film, fitting to the band after heat treatment.Wherein,
The nanocrystalline number of plies of fitting is 2 layers, and selecting the bondline thickness range of glue material is 3 μm~10 μm.Band after fitting is subjected to mould
It cuts processing and prepares required antifreeze plate, combine to obtain wireless charging mould group with charge coil, that is, obtain the nanometer of the present embodiment
Brilliant antifreeze plate.
Under the test condition of 200kHz, 1V, test result is as follows for mould group:
(1) Ls=8.75 μ H；
(2) Rs=598m Ω.
Fig. 3 is the charge efficiency figure under the 5W test platform of embodiment 3, it can be seen from the figure that with charging current
It is gradually increased, the charge efficiency of mould group also steps up.When further increase charging current, mould group charge efficiency therewith slowly under
Drop.When electric current is 0.6A, charge efficiency highest can reach 77.96%.When charging current reaches 1A, the charging of mould group
Efficiency is 75.89%.Therefore, the ultrathin nanometer crystalline substance antifreeze plate prepared using this patent scheme can meet the same of ultrathin
When, moreover it is possible to keep excellent charging performance.
Embodiment 4
Only " commercial nanocrystalline strip FeSiNbBCu is selected, typical ingredient is Fe71Si11Nb1.5B7Cu0.5." and implement
Example 1 is different, other preparation processes are same as Example 1.
Its charge efficiency figure of nanocrystalline antifreeze plate obtained under 5W test platform is identical as Fig. 1.
Embodiment 5
Only " commercial nanocrystalline strip FeSiNbBCu is selected, typical ingredient is Fe76Si15Nb3.5B10Cu2.5." and it is real
It is different to apply example 1, other preparation processes are same as Example 1.
Its charge efficiency figure of nanocrystalline antifreeze plate obtained under 5W test platform is identical as Fig. 1.
Embodiment 6
Only " commercial nanocrystalline strip FeSiNbBCu is selected, typical ingredient is Fe74Si14Nb2.5B8Cu2." and implement
Example 1 is different, other preparation processes are same as Example 1.
Its charge efficiency figure of nanocrystalline antifreeze plate obtained under 5W test platform is identical as Fig. 1.
In conclusion the nanocrystalline antifreeze plate total thickness that the preparation method of nanocrystalline antifreeze plate provided by the invention prepares
Degree is no more than 80 μm, it can be achieved that thinned effect, meets the lightening development trend of smart phone, and test in 5W charge efficiency
It can be realized the charge efficiency not less than 75% under platform.
The above description is only an embodiment of the present invention, is not intended to limit the scope of the invention, all to utilize this hair
Equivalents made by bright specification and accompanying drawing content are applied directly or indirectly in relevant technical field, similarly include
In scope of patent protection of the invention.
Claims (8)
1. a kind of preparation method of nanocrystalline antifreeze plate, which comprises the steps of:
(1) nanocrystalline strip is taken, the typical composition of the nanocrystalline strip is FevSiwNbxByCuz, wherein v=71-76%, w
=11-15%, x=1.5-3.5%, y=7-10%, z=0.5-2.5%；The thickness in monolayer of the nanocrystalline strip is 16-25
μm；
(2) nanocrystalline strip is successively carried out under conditions of nitrogen protection being heat-treated for the first time and second is heat-treated,
First time heat treatment specifically: according to heating rate be 10-20 DEG C/min, by nanocrystalline strip from room temperature to 430-
450 DEG C, and keep the temperature 20-40min；Described second is heat-treated specifically: according to heating rate is 10-20 DEG C/min, by first
Nanocrystalline strip after secondary heat treatment is warming up to 550-560 DEG C from 430-450 DEG C, and keeps the temperature 100-140min；
(3) nanocrystalline strip after being heat-treated second cools down, then by 2 layers of nanocrystalline strip after cooling successively into
Row overlay film and bonding process, the semi-finished product to be die cut after obtaining 2 layers of nanocrystalline strip fitting；
(4) semi-finished product to be die cut are die cut, then are assembled with coil, obtain the nanocrystalline antifreeze plate.
2. the preparation method of nanocrystalline antifreeze plate according to claim 1, which is characterized in that the nanocrystalline strip is quotient
With nanocrystalline strip, in the nanocrystalline strip, v=73.5%, w=13.5%, x=3%, y=9%, z=1%.
3. the preparation method of nanocrystalline antifreeze plate according to claim 1, which is characterized in that adopted in overlay film and bonding process
Glue material with a thickness of 3-10 μm.
4. the preparation method of nanocrystalline antifreeze plate according to claim 1, which is characterized in that in the first time heat treatment
The actual conditions of heat preservation are as follows: 30min is kept the temperature under the conditions of 430-450 DEG C.
5. the preparation method of nanocrystalline antifreeze plate according to claim 1, which is characterized in that in second of the heat treatment
The actual conditions of heat preservation are as follows: 120min is kept the temperature under the conditions of 550-560 DEG C.
6. the preparation method of nanocrystalline antifreeze plate according to claim 1, which is characterized in that, will be second in step (3)
Nanocrystalline strip after heat treatment cools to 20-30 DEG C with the furnace.
7. a kind of nanocrystalline antifreeze plate, which is characterized in that using nanocrystalline antifreeze plate as claimed in any one of claims 1 to 6
Preparation method prepares.
8. nanocrystalline antifreeze plate according to claim 1, which is characterized in that the overall thickness of the nanocrystalline antifreeze plate does not surpass
Cross 80 μm.
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| US11770022B2 (en) | 2021-05-25 | 2023-09-26 | Shenzhen Yn Tech Co., Ltd. | Nanocrystalline magnetic conductive sheet for wireless charging and preparation method therefor |
| CN117395978A (en) * | 2023-12-11 | 2024-01-12 | 杭州象限科技有限公司 | Heat-resistant nanocrystalline magnetic shielding material and preparation method and application thereof |
| CN117395978B (en) * | 2023-12-11 | 2024-03-15 | 杭州象限科技有限公司 | Heat-resistant nanocrystalline magnetic shielding material and preparation method and application thereof |
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Application publication date: 20190528 |
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