CN110335748A - A kind of magnetic flakes and preparation method thereof based on amorphous or nanocrystalline strip - Google Patents
A kind of magnetic flakes and preparation method thereof based on amorphous or nanocrystalline strip Download PDFInfo
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- CN110335748A CN110335748A CN201910678733.3A CN201910678733A CN110335748A CN 110335748 A CN110335748 A CN 110335748A CN 201910678733 A CN201910678733 A CN 201910678733A CN 110335748 A CN110335748 A CN 110335748A
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01F—MAGNETS; INDUCTANCES; TRANSFORMERS; SELECTION OF MATERIALS FOR THEIR MAGNETIC PROPERTIES
- H01F27/00—Details of transformers or inductances, in general
- H01F27/08—Cooling; Ventilating
- H01F27/22—Cooling by heat conduction through solid or powdered fillings
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01F—MAGNETS; INDUCTANCES; TRANSFORMERS; SELECTION OF MATERIALS FOR THEIR MAGNETIC PROPERTIES
- H01F27/00—Details of transformers or inductances, in general
- H01F27/34—Special means for preventing or reducing unwanted electric or magnetic effects, e.g. no-load losses, reactive currents, harmonics, oscillations, leakage fields
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01F—MAGNETS; INDUCTANCES; TRANSFORMERS; SELECTION OF MATERIALS FOR THEIR MAGNETIC PROPERTIES
- H01F27/00—Details of transformers or inductances, in general
- H01F27/34—Special means for preventing or reducing unwanted electric or magnetic effects, e.g. no-load losses, reactive currents, harmonics, oscillations, leakage fields
- H01F27/36—Electric or magnetic shields or screens
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01F—MAGNETS; INDUCTANCES; TRANSFORMERS; SELECTION OF MATERIALS FOR THEIR MAGNETIC PROPERTIES
- H01F38/00—Adaptations of transformers or inductances for specific applications or functions
- H01F38/14—Inductive couplings
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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
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01F—MAGNETS; INDUCTANCES; TRANSFORMERS; SELECTION OF MATERIALS FOR THEIR MAGNETIC PROPERTIES
- H01F27/00—Details of transformers or inductances, in general
- H01F27/34—Special means for preventing or reducing unwanted electric or magnetic effects, e.g. no-load losses, reactive currents, harmonics, oscillations, leakage fields
- H01F2027/348—Preventing eddy currents
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- Power Engineering (AREA)
- Manufacturing & Machinery (AREA)
- Laminated Bodies (AREA)
- Soft Magnetic Materials (AREA)
- Shielding Devices Or Components To Electric Or Magnetic Fields (AREA)
Abstract
The invention belongs to wireless charging component technology fields; more particularly to a kind of magnetic flakes based on amorphous or nanocrystalline strip; including amorphous or nanocrystalline strip; the amorphous or nanocrystalline strip are provided with oxide layer on one side, and the another side of the amorphous or nanocrystalline strip is disposed with insulating heat-conductive glue-line, the first graphene oxide layer, artificial graphite film layer, the second graphene oxide layer and protective film layer；The amorphous or nanocrystalline strip have a sclay texture, there are gap between the sclay texture, are filled with the insulating heat-conductive glue-line in the gap.Compared with the prior art, magnetic flakes thickness of the invention is small, and perfect heat-dissipating, eddy-current loss is low, magnetic conductivity controllable precise.It is easy to operate and cost is relatively low in addition, the invention further relates to a kind of preparation method of magnetic flakes based on amorphous or nanocrystalline strip, it is suitable for producing in batches.
Description
Technical field
The invention belongs to wireless charging component technology field more particularly to a kind of magnetism based on amorphous or nanocrystalline strip
Thin slice and preparation method thereof.
Background technique
For consumer electronics product, wireless charging has the advantages such as easy to operate, versatile.Wireless charging skill
Art is also referred to as contactless charging, by the respectively arranged coil of transmitting terminal and receiving end two sides, the battery sense generated using it
It answers or the mode of frequency resonance realizes wireless charging.Wherein, receiving end-coil nearby usually has the metal parts such as battery, passes through
When battery induction carries out wireless charging, vortex can be formed on metal parts.In order to shield these interference, it usually needs receiving
Stick magnetic flakes in the back side of end-coil.
Currently, the magnetic material of utilizable magnetic flakes mainly has soft magnetic ferrite and amorphous and nanocrystalline strip.
Patent CN104011814A discloses a kind of magnetic field shielding piece, uses amorphous and nanocrystalline strip and bonding layer laminate.It is this
Amorphous and nanocrystalline material in lamination are broken for the intermediate metal slivers for having minim gap by mechanical force or other approach, this
The size in a little shreds and gap is determined by process conditions such as the sizes of mechanical force, shows the situation of size random distribution.However,
The magnetic conductivity of magnetic piece is very sensitive to the size in shred gap, and this method can not control the gap of shred well,
The permeability range of magnetic piece cannot be controlled well, and production efficiency is very low.In addition to this, in use, magnetic
Thin slice is easy to produce eddy-current heating in magnetic field, will affect the normal use of magnetic flakes if thermally conductive and heat dissipation performance is poor.
Summary of the invention
It is an object of the present invention to: in view of the deficiencies of the prior art, and provide a kind of based on amorphous or nanocrystalline band
The magnetic flakes of material, thickness is small, and perfect heat-dissipating, eddy-current loss is low, magnetic conductivity controllable precise.
To achieve the goals above, the invention adopts the following technical scheme:
A kind of magnetic flakes based on amorphous or nanocrystalline strip, including amorphous or nanocrystalline strip, the amorphous or receive
Rice crystal zone material is provided with oxide layer on one side, and the another side of the amorphous or nanocrystalline strip is disposed with thermal plastic insulation
Layer, the first graphene oxide layer, artificial graphite film layer, the second graphene oxide layer and protective film layer；The amorphous or nanometer
Crystal zone material has sclay texture, there are gap between the sclay texture, is filled with the insulating heat-conductive in the gap
Glue-line.
As a kind of improvement of the magnetic flakes of the present invention based on amorphous or nanocrystalline strip, the oxide layer packet
Binder and oxide are included, the oxide is at least one of iron oxide, ferrous oxide, ferroso-ferric oxide, the bonding
Agent is polytetrafluoroethylene (PTFE) and/or Kynoar.
As a kind of improvement of the magnetic flakes of the present invention based on amorphous or nanocrystalline strip, the insulating heat-conductive
Glue-line includes polytetrafluoroethylene (PTFE), hydroxy-ethyl acrylate, heat filling, the hydrophosphate of iron and deionized water.
As a kind of improvement of the magnetic flakes of the present invention based on amorphous or nanocrystalline strip, the oxide layer
With a thickness of 2~20 μm.
As a kind of improvement of the magnetic flakes of the present invention based on amorphous or nanocrystalline strip, be filled in it is described between
Insulating heat-conductive bondline thickness in gap is 0.01~1 μm, and the insulation for being set to the amorphous or nanocrystalline strip surface is led
Hot glue layer with a thickness of 3~20 μm.
As a kind of improvement of the magnetic flakes of the present invention based on amorphous or nanocrystalline strip, the artificial graphite
Film layer with a thickness of 12~50 μm.
As a kind of improvement of the magnetic flakes of the present invention based on amorphous or nanocrystalline strip, first oxidation
Graphene layer and the thickness of second graphene oxide layer are 5~20 μm.
As a kind of improvement of the magnetic flakes of the present invention based on amorphous or nanocrystalline strip, the protective film layer
For the PET insulating film of single-sided back-adhesive.
As a kind of improvement of the magnetic flakes of the present invention based on amorphous or nanocrystalline strip, the protective film layer
With a thickness of 10~100 μm.
It is another object of the present invention to: a kind of preparation side of magnetic flakes based on amorphous or nanocrystalline strip is provided
Method, comprising the following steps:
1) amorphous or nanocrystalline strip are heat-treated, and are crushed, obtain the amorphous with sclay texture or
Nanocrystalline strip；
2) polytetrafluoroethylene (PTFE), hydroxy-ethyl acrylate, heat filling, the hydrophosphate of iron and deionized water are mixed absolutely
The thermally conductive glue of edge；
3) 2) the insulating heat-conductive glue obtained is poured in the amorphous or nanocrystalline band with sclay texture 1) obtained
The one side of material, the thermally conductive glue of SI semi-insulation are filled in the gap of sclay texture, and the insulating heat-conductive glue of another part is uniform
It is laminating in amorphous or nanocrystalline strip surface, form insulating heat-conductive glue-line, wherein iron-containing hydrophosphate and amorphous are nanocrystalline
Phosphatization occurs for band；
4) an artificial graphite film is taken, in one layer of first graphene oxide of one side spraying or deposition of artificial graphite film
Layer, one layer of second graphene oxide layer of the spraying of another side face or deposition；
5) there is being attached on one side for the first graphene oxide layer described exhausted the artificial graphite thin film coatings that step 4) obtains
Edge heat-conducting glue layer；
6) insulating film is attached at the second graphene oxide layer；
7) binder and oxide are mixed to get oxidation slurry, it is coated on the another of amorphous or nanocrystalline strip
Face forms oxide layer, obtains the magnetic flakes based on amorphous or nanocrystalline strip.
Compared with the prior art, the beneficial effects of the present invention are:
1) amorphous of the invention or nanocrystalline strip have a sclay texture, and there are gap, gaps between sclay texture
It is interior to be filled with insulating heat-conductive glue-line, it is arranged such, it is possible to reduce the contact area between sclay texture increases contact electricity
Resistance, maximally reduces eddy-current loss；Furthermore it is also possible to control flakey knot by the thickness for changing insulating heat-conductive glue-line
The gap of structure, the final controllable precise for realizing magnetic flakes magnetic conductivity.In addition to this, oxide layer has high resistivity, can play
Insulating effect also can be reduced eddy-current loss, improve charge efficiency.
2) amorphous or nanocrystalline strip of the present invention set gradually on one side insulating heat-conductive glue-line, the first graphene oxide layer,
Artificial graphite film and the second graphene oxide layer, wherein graphene oxide has good heating conduction and mechanical property, makes
Magnetic flakes it is lightening while improve the heat dissipation performance and intensity of magnetic flakes.In addition, graphene oxide is due to surface
Rich in functional group, very strong with the binding ability of artificial graphite alkene film, coating adhesion is strong, durable.Moreover, oxygen
Graphite alkene is cheap, raw material is easy to get, preparation facilitates, and can be realized prepare with scale and application.
Detailed description of the invention
Fig. 1 is structural schematic diagram of the invention.
Wherein: 1- amorphous or nanocrystalline strip, 2- oxide layer, 3- insulating heat-conductive glue-line, the first graphene oxide layer of 4-, 5-
Artificial graphite alkene film layer, the second graphene oxide layer of 6-, 7- protective film layer, the gap 11-.
Specific embodiment
As shown in Figure 1, a kind of magnetic flakes based on amorphous or nanocrystalline strip, including amorphous or nanocrystalline strip 1, it is non-
Brilliant or nanocrystalline strip 1 to be provided with oxide layer 2 on one side, the another side of amorphous or nanocrystalline strip 1 is disposed with insulation and leads
Hot glue layer 3, the first graphene oxide layer 4, artificial graphite film layer 5, the second graphene oxide layer 6 and protective film layer 7；Amorphous or
Nanocrystalline strip 1 has sclay texture, there are gap 11 between sclay texture, is filled with insulating heat-conductive glue-line in gap 11
3。
Further, oxide layer 1 includes binder and oxide, and oxide is iron oxide, ferrous oxide, ferroso-ferric oxide
At least one of.Binder is polytetrafluoroethylene (PTFE) and/or Kynoar.Oxide layer 1 with a thickness of 2~20 μm.
Further, insulating heat-conductive glue-line 3 includes the phosphoric acid hydrogen of polytetrafluoroethylene (PTFE), hydroxy-ethyl acrylate, heat filling, iron
Salt and deionized water.The insulating heat-conductive glue-line 3 in gap 11 is filled in a thickness of 0.01~1 μm, is set to amorphous or nanocrystalline
The insulating heat-conductive glue-line 3 on 1 surface of band with a thickness of 3~20 μm.
Further, artificial graphite film layer 5 with a thickness of 12~50 μm.First graphene oxide layer 4 and the second oxidation
The thickness of graphene layer 6 is 5~20 μm.
Further, protective film layer 7 is the PET insulating film of single-sided back-adhesive.Protective film layer 7 with a thickness of 10~100 μm.
The present invention is described in further detail With reference to embodiment, but embodiments of the present invention are not
It is limited to this.
Embodiment 1
The preparation of magnetic flakes based on amorphous or nanocrystalline strip:
First it will be heat-treated and crushed with a thickness of 100 μm of amorphous or nanocrystalline strip, obtained with sclay texture
Amorphous or nanocrystalline strip；Secondly, by polytetrafluoroethylene (PTFE), hydroxy-ethyl acrylate, heat filling, iron hydrophosphate and go from
Sub- water is mixed and made into insulating heat-conductive glue, and is poured in the one side of amorphous or nanocrystalline strip with sclay texture,
The thermally conductive glue of SI semi-insulation is filled in the insulating heat-conductive glue-line formed in the gap of sclay texture with a thickness of 0.01 μm, another portion
The insulating heat-conductive glue divided is uniformly laminating to form the insulating heat-conductive glue-line with a thickness of 3 μm in amorphous or nanocrystalline strip surface,
In, phosphatization occurs for iron-containing hydrophosphate and amorphous or nanocrystalline strip；Then, it takes one thin with a thickness of 12 μm of artificial graphite
Film, the first graphene oxide layer for being 5 μm in the one side spraying of artificial graphite film or deposition a layer thickness, the spraying of another side face
Or the second graphene oxide layer that deposition a layer thickness is 5 μm；And being attached on one side for the first graphene oxide layer will be coated with
Insulating heat-conductive glue-line, meanwhile, the insulating film with a thickness of 10 μm is attached at the second graphene oxide layer；Finally, by polytetrafluoroethyl-ne
Alkene and iron oxide are mixed to get oxidation slurry, and it is coated on the another side formation of amorphous or nanocrystalline strip with a thickness of 2 μm
Oxide layer, obtain the magnetic flakes based on amorphous or nanocrystalline strip.
Embodiment 2
The preparation of magnetic flakes based on amorphous or nanocrystalline strip:
First it will be heat-treated and crushed with a thickness of 100 μm of amorphous or nanocrystalline strip, obtained with sclay texture
Amorphous or nanocrystalline strip；Secondly, by polytetrafluoroethylene (PTFE), hydroxy-ethyl acrylate, heat filling, iron hydrophosphate and go from
Sub- water is mixed and made into insulating heat-conductive glue, and is poured in the one side of amorphous or nanocrystalline strip with sclay texture,
The thermally conductive glue of SI semi-insulation is filled in the insulating heat-conductive glue-line formed in the gap of sclay texture with a thickness of 1 μm, another part
The uniform laminating insulating heat-conductive glue-line formed in amorphous or nanocrystalline strip surface with a thickness of 20 μm of insulating heat-conductive glue,
In, phosphatization occurs for iron-containing hydrophosphate and amorphous or nanocrystalline strip；Then, it takes one thin with a thickness of 50 μm of artificial graphite
Film, the first graphene oxide layer for being 20 μm in the one side spraying of artificial graphite film or deposition a layer thickness, the spray of another side face
Apply or deposit the second graphene oxide layer that a layer thickness is 20 μm；And being sticked on one side for the first graphene oxide layer will be coated with
In insulating heat-conductive glue-line, meanwhile, the insulating film with a thickness of 100 μm is attached at the second graphene oxide layer；Finally, inclined fluorine will be gathered
Ethylene and ferroso-ferric oxide are mixed to get oxidation slurry, and it is coated on to the another side formation thickness of amorphous or nanocrystalline strip
For 20 μm of oxide layer, the magnetic flakes based on amorphous or nanocrystalline strip are obtained.
Embodiment 3
The preparation of magnetic flakes based on amorphous or nanocrystalline strip:
First it will be heat-treated and crushed with a thickness of 100 μm of amorphous or nanocrystalline strip, obtained with sclay texture
Amorphous or nanocrystalline strip；Secondly, by polytetrafluoroethylene (PTFE), hydroxy-ethyl acrylate, heat filling, iron hydrophosphate and go from
Sub- water is mixed and made into insulating heat-conductive glue, and is poured in the one side of amorphous or nanocrystalline strip with sclay texture,
The thermally conductive glue of SI semi-insulation is filled in the insulating heat-conductive glue-line formed in the gap of sclay texture with a thickness of 0.05 μm, another portion
The insulating heat-conductive glue divided is uniformly laminating to form the insulating heat-conductive glue-line with a thickness of 10 μm in amorphous or nanocrystalline strip surface,
In, phosphatization occurs for iron-containing hydrophosphate and amorphous or nanocrystalline strip；Then, it takes one thin with a thickness of 30 μm of artificial graphite
Film, the first graphene oxide layer for being 12 μm in the one side spraying of artificial graphite film or deposition a layer thickness, the spray of another side face
Apply or deposit the second graphene oxide layer that a layer thickness is 12 μm；And being sticked on one side for the first graphene oxide layer will be coated with
In insulating heat-conductive glue-line, meanwhile, the insulating film with a thickness of 50 μm is attached at the second graphene oxide layer；Finally, by polytetrafluoro
Ethylene, Kynoar, ferrous oxide and iron oxide are mixed to get oxidation slurry, and it is coated on amorphous or nanocrystalline strip
Another side formed with a thickness of 10 μm of oxide layer, obtain the magnetic flakes based on amorphous or nanocrystalline strip.
Comparative example 1
The preparation of magnetic flakes based on amorphous or nanocrystalline strip:
First crazing processing will be carried out with a thickness of 100 μm of amorphous or nanocrystalline strip, obtained several with 5 μm of gap
Amorphous or nanocrystalline chips unit；Then, it is formed in amorphous or nanocrystalline chips cell surface and gap with a thickness of 100 μm
Insulation glue-line；Finally obtained with a thickness of 50 μm of graphite linings based on amorphous or nanocrystalline band in the surface setting of insulation glue-line
The magnetic flakes of material.
Test result
Magnetic flakes made from Examples 1 to 3 and comparative example are tested, obtain that the results are shown in Table 1.
1 test result of table
As can be seen from Table 1, compared to the magnetic flakes of comparative example 1, the magnetic flakes of Examples 1 to 3 are thinner, magnetic
Resistance is smaller, inductance is bigger and thermal conductivity is bigger, that is to say, that its magnetic screen of magnetic flakes produced by the present invention and thermal diffusivity
It can be more excellent.This is because:
1) amorphous of the invention or nanocrystalline strip have a sclay texture, and there are gap, gaps between sclay texture
It is interior to be filled with insulating heat-conductive glue-line, it is arranged such, it is possible to reduce the contact area between sclay texture increases contact electricity
Resistance, maximally reduces eddy-current loss；Furthermore it is also possible to control flakey knot by the thickness for changing insulating heat-conductive glue-line
The gap of structure, the final controllable precise for realizing magnetic flakes magnetic conductivity, Examples 1 to 3 are located at the insulating heat-conductive glue-line in gap
Thickness is significantly lower than comparative example 1, and thickness is as small as possible while realizing insulation, can reduce magnetic resistance, improves magnetic conductivity and inductance.
In addition to this, oxide layer has high resistivity, can play insulating effect, also can be reduced eddy-current loss, improves charge efficiency.
2) amorphous or nanocrystalline strip of the present invention set gradually on one side insulating heat-conductive glue-line, the first graphene oxide layer,
Artificial graphite film and the second graphene oxide layer, wherein graphene oxide has good heating conduction, so that magnetic flakes
The heat dissipation performance of magnetic flakes is improved while lightening.
According to the disclosure and teachings of the above specification, those skilled in the art in the invention can also be to above-mentioned embodiment party
Formula is changed and is modified.Therefore, the invention is not limited to above-mentioned specific embodiment, all those skilled in the art exist
Made any conspicuous improvement, replacement or modification all belong to the scope of protection of the present invention on the basis of the present invention.This
Outside, although using some specific terms in this specification, these terms are merely for convenience of description, not to the present invention
Constitute any restrictions.
Claims (10)
1. a kind of magnetic flakes based on amorphous or nanocrystalline strip, it is characterised in that: described including amorphous or nanocrystalline strip
Amorphous or nanocrystalline strip are provided with oxide layer on one side, and the another side of the amorphous or nanocrystalline strip is disposed with insulation
Heat-conducting glue layer, the first graphene oxide layer, artificial graphite film layer, the second graphene oxide layer and protective film layer；The amorphous
Or nanocrystalline strip has sclay texture, there are gap between the sclay texture, in the gap filled with it is described absolutely
Edge heat-conducting glue layer.
2. the magnetic flakes according to claim 1 based on amorphous or nanocrystalline strip, it is characterised in that: the oxide layer
Including binder and oxide, the oxide is at least one of iron oxide, ferrous oxide, ferroso-ferric oxide, described viscous
Tying agent is polytetrafluoroethylene (PTFE) and/or Kynoar.
3. the magnetic flakes according to claim 1 based on amorphous or nanocrystalline strip, it is characterised in that: the insulation is led
Hot glue layer includes polytetrafluoroethylene (PTFE), hydroxy-ethyl acrylate, heat filling, the hydrophosphate of iron and deionized water.
4. the magnetic flakes according to claim 1 based on amorphous or nanocrystalline strip, it is characterised in that: the oxide layer
With a thickness of 2~20 μm.
5. the magnetic flakes according to claim 1 based on amorphous or nanocrystalline strip, it is characterised in that: be filled in described
Insulating heat-conductive bondline thickness in gap is 0.01~1 μm, is set to the insulation on the amorphous or nanocrystalline strip surface
Heat-conducting glue layer with a thickness of 3~20 μm.
6. the magnetic flakes according to claim 1 based on amorphous or nanocrystalline strip, it is characterised in that: the artificial stone
Black film layer with a thickness of 12~50 μm.
7. the magnetic flakes according to claim 1 based on amorphous or nanocrystalline strip, it is characterised in that: first oxygen
Graphite alkene layer and the thickness of second graphene oxide layer are 5~20 μm.
8. the magnetic flakes according to claim 1 based on amorphous or nanocrystalline strip, it is characterised in that: the protective film
Layer is the PET insulating film of single-sided back-adhesive.
9. the magnetic flakes according to claim 1 based on amorphous or nanocrystalline strip, it is characterised in that: the protective film
Layer with a thickness of 10~100 μm.
10. a kind of preparation method of the magnetic flakes according to any one of claims 1 to 9 based on amorphous or nanocrystalline strip,
Characterized by comprising the following steps:
1) amorphous or nanocrystalline strip are heat-treated, and are crushed, obtain the amorphous with sclay texture or nanometer
Crystal zone material；
2) polytetrafluoroethylene (PTFE), hydroxy-ethyl acrylate, heat filling, the hydrophosphate of iron and deionized water insulation is mixed and made into lead
Hot glue liquid；
3) 2) the insulating heat-conductive glue that obtains is poured in 1) obtaining amorphous with sclay texture or nanocrystalline strip
On one side, the thermally conductive glue of SI semi-insulation is filled in the gap of sclay texture, and the insulating heat-conductive glue of another part is uniformly laminating
In amorphous or nanocrystalline strip surface, insulating heat-conductive glue-line is formed, wherein iron-containing hydrophosphate and amorphous or nanocrystalline strip
Phosphatization occurs；
4) an artificial graphite film is taken, in one layer of first graphene oxide layer of one side spraying or deposition of artificial graphite film, separately
One layer of second graphene oxide layer of face spraying or deposition on one side；
5) insulation that is attached on one side of the first graphene oxide layer leads the artificial graphite thin film coatings that step 4) obtains
Hot glue layer；
6) insulating film is attached at the second graphene oxide layer；
7) binder and oxide are mixed to get oxidation slurry, it is coated on to the another side of amorphous or nanocrystalline strip, shape
At oxide layer, the magnetic flakes based on amorphous or nanocrystalline strip are obtained.
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| CN110335748B (en) * | 2019-07-25 | 2022-04-05 | 东莞市鸿亿导热材料有限公司 | Magnetic thin sheet based on amorphous or nanocrystalline strip and preparation method thereof |
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