CN106699159A - Ferrite powder and preparation method and application thereof - Google Patents
Ferrite powder and preparation method and application thereof Download PDFInfo
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- CN106699159A CN106699159A CN201611162877.6A CN201611162877A CN106699159A CN 106699159 A CN106699159 A CN 106699159A CN 201611162877 A CN201611162877 A CN 201611162877A CN 106699159 A CN106699159 A CN 106699159A
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- ferrite powder
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- 229910000859 α-Fe Inorganic materials 0.000 title claims abstract description 125
- 239000000843 powder Substances 0.000 title claims abstract description 95
- 238000002360 preparation method Methods 0.000 title claims abstract description 21
- 239000002002 slurry Substances 0.000 claims abstract description 53
- UPWOEMHINGJHOB-UHFFFAOYSA-N oxo(oxocobaltiooxy)cobalt Chemical compound O=[Co]O[Co]=O UPWOEMHINGJHOB-UHFFFAOYSA-N 0.000 claims abstract description 32
- 239000011521 glass Substances 0.000 claims abstract description 27
- WMWLMWRWZQELOS-UHFFFAOYSA-N bismuth(iii) oxide Chemical compound O=[Bi]O[Bi]=O WMWLMWRWZQELOS-UHFFFAOYSA-N 0.000 claims abstract description 25
- JEIPFZHSYJVQDO-UHFFFAOYSA-N iron(III) oxide Inorganic materials O=[Fe]O[Fe]=O JEIPFZHSYJVQDO-UHFFFAOYSA-N 0.000 claims abstract description 17
- 239000000463 material Substances 0.000 claims description 28
- 239000000203 mixture Substances 0.000 claims description 25
- 239000000428 dust Substances 0.000 claims description 24
- 238000000498 ball milling Methods 0.000 claims description 16
- 239000003960 organic solvent Substances 0.000 claims description 13
- 238000000034 method Methods 0.000 claims description 11
- 238000000227 grinding Methods 0.000 claims description 10
- 238000001035 drying Methods 0.000 claims description 8
- 239000000758 substrate Substances 0.000 claims description 8
- 239000012298 atmosphere Substances 0.000 claims description 5
- 239000007789 gas Substances 0.000 claims description 5
- 230000001681 protective effect Effects 0.000 claims description 5
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 claims description 4
- UQSXHKLRYXJYBZ-UHFFFAOYSA-N Iron oxide Chemical compound [Fe]=O UQSXHKLRYXJYBZ-UHFFFAOYSA-N 0.000 claims description 3
- 229910052742 iron Inorganic materials 0.000 claims description 2
- 230000005294 ferromagnetic effect Effects 0.000 claims 1
- 238000005245 sintering Methods 0.000 abstract description 38
- 230000006698 induction Effects 0.000 description 15
- 230000035699 permeability Effects 0.000 description 7
- RBNWAMSGVWEHFP-UHFFFAOYSA-N trans-p-Menthane-1,8-diol Chemical compound CC(C)(O)C1CCC(C)(O)CC1 RBNWAMSGVWEHFP-UHFFFAOYSA-N 0.000 description 7
- IJGRMHOSHXDMSA-UHFFFAOYSA-N Atomic nitrogen Chemical compound N#N IJGRMHOSHXDMSA-UHFFFAOYSA-N 0.000 description 6
- 238000002156 mixing Methods 0.000 description 6
- 239000007791 liquid phase Substances 0.000 description 5
- 239000013078 crystal Substances 0.000 description 4
- 230000009467 reduction Effects 0.000 description 4
- 238000012360 testing method Methods 0.000 description 4
- 230000000694 effects Effects 0.000 description 3
- 239000003292 glue Substances 0.000 description 3
- 229910052757 nitrogen Inorganic materials 0.000 description 3
- 239000004576 sand Substances 0.000 description 3
- 239000001856 Ethyl cellulose Substances 0.000 description 2
- ZZSNKZQZMQGXPY-UHFFFAOYSA-N Ethyl cellulose Chemical compound CCOCC1OC(OC)C(OCC)C(OCC)C1OC1C(O)C(O)C(OC)C(CO)O1 ZZSNKZQZMQGXPY-UHFFFAOYSA-N 0.000 description 2
- 229910001053 Nickel-zinc ferrite Inorganic materials 0.000 description 2
- MCMNRKCIXSYSNV-UHFFFAOYSA-N Zirconium dioxide Chemical compound O=[Zr]=O MCMNRKCIXSYSNV-UHFFFAOYSA-N 0.000 description 2
- RFIJBZKUGCJPOE-UHFFFAOYSA-N [Fe].[Ni].[Zn] Chemical compound [Fe].[Ni].[Zn] RFIJBZKUGCJPOE-UHFFFAOYSA-N 0.000 description 2
- 238000004026 adhesive bonding Methods 0.000 description 2
- 230000005674 electromagnetic induction Effects 0.000 description 2
- 229920001249 ethyl cellulose Polymers 0.000 description 2
- 235000019325 ethyl cellulose Nutrition 0.000 description 2
- 125000001495 ethyl group Chemical group [H]C([H])([H])C([H])([H])* 0.000 description 2
- 230000006872 improvement Effects 0.000 description 2
- 239000012299 nitrogen atmosphere Substances 0.000 description 2
- 230000002528 anti-freeze Effects 0.000 description 1
- 230000005540 biological transmission Effects 0.000 description 1
- 239000001913 cellulose Substances 0.000 description 1
- 229920002678 cellulose Polymers 0.000 description 1
- 239000000919 ceramic Substances 0.000 description 1
- 230000008859 change Effects 0.000 description 1
- 238000006243 chemical reaction Methods 0.000 description 1
- 239000004020 conductor Substances 0.000 description 1
- 238000013461 design Methods 0.000 description 1
- 230000005611 electricity Effects 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 230000002708 enhancing effect Effects 0.000 description 1
- 238000002474 experimental method Methods 0.000 description 1
- 238000010438 heat treatment Methods 0.000 description 1
- 238000009413 insulation Methods 0.000 description 1
- 239000000696 magnetic material Substances 0.000 description 1
- 238000003801 milling Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 230000021715 photosynthesis, light harvesting Effects 0.000 description 1
- 230000008569 process Effects 0.000 description 1
- 238000004513 sizing Methods 0.000 description 1
- 238000002791 soaking Methods 0.000 description 1
- 239000002904 solvent Substances 0.000 description 1
- 239000000126 substance Substances 0.000 description 1
- 230000001629 suppression Effects 0.000 description 1
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 1
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- C04B35/00—Shaped ceramic products characterised by their composition; Ceramics compositions; Processing powders of inorganic compounds preparatory to the manufacturing of ceramic products
- C04B35/01—Shaped ceramic products characterised by their composition; Ceramics compositions; Processing powders of inorganic compounds preparatory to the manufacturing of ceramic products based on oxide ceramics
- C04B35/26—Shaped ceramic products characterised by their composition; Ceramics compositions; Processing powders of inorganic compounds preparatory to the manufacturing of ceramic products based on oxide ceramics based on ferrites
- C04B35/2666—Other ferrites containing nickel, copper or cobalt
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- C04B35/00—Shaped ceramic products characterised by their composition; Ceramics compositions; Processing powders of inorganic compounds preparatory to the manufacturing of ceramic products
- C04B35/622—Forming processes; Processing powders of inorganic compounds preparatory to the manufacturing of ceramic products
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01F—MAGNETS; INDUCTANCES; TRANSFORMERS; SELECTION OF MATERIALS FOR THEIR MAGNETIC PROPERTIES
- H01F1/00—Magnets or magnetic bodies characterised by the magnetic materials therefor; Selection of materials for their magnetic properties
- H01F1/01—Magnets or magnetic bodies characterised by the magnetic materials therefor; Selection of materials for their magnetic properties of inorganic materials
- H01F1/03—Magnets or magnetic bodies characterised by the magnetic materials therefor; Selection of materials for their magnetic properties of inorganic materials characterised by their coercivity
- H01F1/032—Magnets or magnetic bodies characterised by the magnetic materials therefor; Selection of materials for their magnetic properties of inorganic materials characterised by their coercivity of hard-magnetic materials
- H01F1/10—Magnets or magnetic bodies characterised by the magnetic materials therefor; Selection of materials for their magnetic properties of inorganic materials characterised by their coercivity of hard-magnetic materials non-metallic substances, e.g. ferrites, e.g. [(Ba,Sr)O(Fe2O3)6] ferrites with hexagonal structure
- H01F1/11—Magnets or magnetic bodies characterised by the magnetic materials therefor; Selection of materials for their magnetic properties of inorganic materials characterised by their coercivity of hard-magnetic materials non-metallic substances, e.g. ferrites, e.g. [(Ba,Sr)O(Fe2O3)6] ferrites with hexagonal structure in the form of particles
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01F—MAGNETS; INDUCTANCES; TRANSFORMERS; SELECTION OF MATERIALS FOR THEIR MAGNETIC PROPERTIES
- H01F41/00—Apparatus or processes specially adapted for manufacturing or assembling magnets, inductances or transformers; Apparatus or processes specially adapted for manufacturing materials characterised by their magnetic properties
- H01F41/02—Apparatus or processes specially adapted for manufacturing or assembling magnets, inductances or transformers; Apparatus or processes specially adapted for manufacturing materials characterised by their magnetic properties for manufacturing cores, coils, or magnets
- H01F41/04—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 for manufacturing coils
- H01F41/041—Printed circuit coils
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- C04B2235/30—Constituents and secondary phases not being of a fibrous nature
- C04B2235/32—Metal oxides, mixed metal oxides, or oxide-forming salts thereof, e.g. carbonates, nitrates, (oxy)hydroxides, chlorides
- C04B2235/3231—Refractory metal oxides, their mixed metal oxides, or oxide-forming salts thereof
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- C04B2235/32—Metal oxides, mixed metal oxides, or oxide-forming salts thereof, e.g. carbonates, nitrates, (oxy)hydroxides, chlorides
- C04B2235/327—Iron group oxides, their mixed metal oxides, or oxide-forming salts thereof
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- C04B2235/32—Metal oxides, mixed metal oxides, or oxide-forming salts thereof, e.g. carbonates, nitrates, (oxy)hydroxides, chlorides
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- C04B2235/32—Metal oxides, mixed metal oxides, or oxide-forming salts thereof, e.g. carbonates, nitrates, (oxy)hydroxides, chlorides
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- C04B2235/32—Metal oxides, mixed metal oxides, or oxide-forming salts thereof, e.g. carbonates, nitrates, (oxy)hydroxides, chlorides
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- C04B2235/32—Metal oxides, mixed metal oxides, or oxide-forming salts thereof, e.g. carbonates, nitrates, (oxy)hydroxides, chlorides
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Abstract
The invention discloses ferrite powder and a preparation method and application thereof. The ferrite powder is prepared from, by mass, 59-68 parts of Fe2O3, 14-20 parts of ZnO, 6-10 parts of NiO, 3-6.5 parts of CuO, 5.5-5.5 parts of glass powder, 0.10-0.20 part of Co2O3, 0.15-0.30 part of V2O5 and 0.10-0.30 part of Bi2O3. The ferrite powder is low in sintering temperature and can be cofired with coil slurry, and accordingly the conduction performance of wireless charging equipment can be improved.
Description
Technical field
The present invention relates to technical field of magnetic materials, more particularly, to a kind of ferrite powder and preparation method thereof and should
With.
Background technology
The wireless charging function of the electronic equipments such as mobile phone is typically realized using the principle of electromagnetic induction, by two coils
Between electromagnetic conversion realize the transmission of energy.Charging receiving terminal generally requires to place one piece of magnetic sheet use in wireless charging device
In decay of the metallic conductor to magnetic field is prevented, play a part of amendment magnetic field, reduce interference, energy dissipation prevented, so as to improve
Charge efficiency.
However, the mounting process of general wireless charging device is first to carry out dispensing treatment again by line in the one side of antifreeze plate
Circle and lead are bonded at magnetic sheet and have the one side of glue, and coil is fixed with magnetic sheet by toasting.Due in electromagnetic induction, sending out
The distance of sending end and receiving terminal is the key factor for influenceing charge efficiency, and glue layer has certain thickness, causes electric conductivity
Difference.And if not passing through glue bonding, by the mode of the combination of coil and magnetic sheet direct sintering, due to the sintering temperature of coil slurry
Degree is below 900 DEG C, and traditional ferritic sintering temperature cannot realize common burning between the two more than 1000 DEG C.
The content of the invention
Based on this, it is necessary to provide a kind of ferrite powder and its preparation that can realize that ferrite and coil slurry burn altogether
Methods and applications.
A kind of ferrite powder, according to the mass fraction, including following component：
Including following component in one embodiment, according to the mass fraction,：
In one embodiment, according to the mass fraction, the glass dust includes following component：
The preparation method of above-mentioned ferrite powder, comprises the following steps：
Based on the mass fraction of the ferrite powder, by 59 parts~68 parts of Fe2O3, 14 parts~20 parts ZnO, 6 parts~
The CuO of NiO and 3 part of 10 parts~6.5 parts is mixed to get the first mixture；
The first powder is obtained by the first mixture wet ball grinding and after drying；
Preburning material will be obtained after the first powder pre-burning；
Based on the mass fraction of the ferrite powder, in the Preburning material add 5.5 parts~8.5 parts glass dust,
0.10 part~0.20 part of Co2O3, 0.15 part~0.30 part of V2O5And 0.10 part~0.30 part of Bi2O3Obtain the second mixing
Thing；And
The ferrite powder will be obtained after the second mixture ball milling.
In one embodiment, the behaviour that the first powder is obtained by the first mixture wet ball grinding and after drying
In work, Ball-milling Time is 4h~8h, and rotating speed is 300r/min~500r/min, and the powder after wet ball grinding is at 100 DEG C~150 DEG C
Under the conditions of dry 3h~5h after obtain first powder.
In one embodiment, it is described by the operation that Preburning material is obtained after the first powder pre-burning, the pre-burning
Carried out under protective gas atmosphere, temperature is 790 DEG C~810 DEG C.
In one embodiment, it is described the operation of the ferrite powder to be obtained after the second mixture ball milling
In, Ball-milling Time is 12h~16h, and rotating speed is 300r/min~500r/min.
A kind of ferrite slurry, including organic solvent and above-mentioned ferrite powder.
The preparation method of above-mentioned ferrite slurry, comprises the following steps：
Above-mentioned ferrite powder is provided；And
More than 6h is sanded after the ferrite powder and organic solvent are mixed, the ferrite slurry is obtained.
A kind of wireless charging device, including conductive coil and the ferrite layer that is covered on the conductive coil, it is described
Wireless charging device is prepared by the following method and obtains：
Substrate is provided；
Coil slurry and above-mentioned ferrite slurry are covered on substrate；And
4h~8h is sintered under the conditions of 850 DEG C~875 DEG C, the coil slurry forms conductive coil, the ferrite slurry
Material forms the ferrite layer, obtains the wireless charging device.
Above-mentioned ferrite powder, according to the mass fraction, including 59 parts~68 parts of Fe2O3, 14 parts~20 parts ZnO, 6 parts
~10 parts of NiO, 3 parts~6.5 parts of CuO, 5.5 parts~8.5 parts of glass dust, 0.10 part~0.20 part of Co2O3, 0.15 part
~0.30 part of V2O5And 0.10 part~0.30 part of Bi2O3.The magnetic conductance that appropriate ZnO and NiO to adjust material is forthright
Can μ i and magnetic induction density B s adapting to Qi standard of the material in wireless charging.Appropriate CuO is added in nickel-zinc ferrite
Ferrite sintered temperature is reduced, appropriate glass dust causes the performance of ferrite sintered rear acquisition pulp-like, and plays suppression
The effect of coarse grains.Appropriate Co2O3、V2O5、Bi2O3Liquid phase can be formed in ferritic crystal boundary as sintering aid, is dropped
Low ferrite sintered temperature, increases ferritic consistency after sintering, strengthens magnetic induction intensity.Through experimental test, this group
The ferrite powder sintering temperature divided is relatively low, can altogether be burnt with coil slurry, so as to improve the electric conductivity of wireless charging device.
Brief description of the drawings
Fig. 1 is the flow chart of the preparation method of the ferrite powder of an implementation method；
Fig. 2 is the flow chart of the preparation method of the ferrite slurry of an implementation method；
Fig. 3 is the flow chart of the preparation method of the wireless charging device of an implementation method.
Specific embodiment
To enable the above objects, features and advantages of the present invention more obvious understandable, below in conjunction with the accompanying drawings to the present invention
Specific embodiment be described in detail.Elaborate many details in order to fully understand this hair in the following description
It is bright.But the present invention can be implemented with being much different from other manner described here, and those skilled in the art can be not
Similar improvement is done in the case of running counter to intension of the present invention, therefore the present invention is not limited by following public specific implementation.
The ferrite powder of one implementation method, according to the mass fraction, including following component：
Contain nickel zinc iron (NiZnCFe) element in above-mentioned ferrite powder main component, appropriate ZnO and NiO comes can be with
The magnetic conductivity performance μ i and magnetic induction density B s of material is adjusted to adapt to Qi standard of the material in wireless charging.In nickel zinc iron
(NiZnCFe) the ferrite sintered temperature of appropriate CuO reductions is added in ferrite, appropriate glass dust causes ferrite sintered
The performance of pulp-like is obtained afterwards, and plays a part of to suppress coarse grains.Appropriate Co2O3、V2O5、Bi2O3As sintering aid
Liquid phase can be formed in ferritic crystal boundary, ferrite sintered temperature is reduced, increases ferritic consistency after sintering, enhancing
Magnetic induction intensity.
The ferrite powder of this component can be sintered below 900 DEG C, such that it is able to be closed with coil slurry co-sintering, nothing
Need to be fitted by glue, improve the electric conductivity of wireless charging device.
Specifically, Co2O3、V2O5And Bi2O3The gross mass number of three accounts for less than 0.80 part of ferrite powder.
Further, according to the mass fraction, ferrite powder includes following component：
In one embodiment, according to the mass fraction, ferrite powder includes 62.97 parts of Fe2O3, 16.00 parts
ZnO, 8.563 parts of NiO, 5.453 parts of CuO, 6.512 parts of glass dust, 0.142 part of Co2O3, 0.167 part of V2O5And
0.109 part of Bi2O3。
In another embodiment, according to the mass fraction, ferrite powder includes 62.892 parts of Fe2O3, 17.625 parts
ZnO, 7.037 parts of NiO, 5.447 parts of CuO, 6.504 parts of glass dust, 0.142 part of Co2O3, 0.167 part of V2O5With
And 0.112 part of Bi2O3。
In another embodiment, according to the mass fraction, ferrite powder includes 64.477 parts of Fe2O3, 15.857 parts
ZnO, 8.482 parts of NiO, 4.236 parts of CuO, 6.451 parts of glass dust, 0.142 part of Co2O3, 0.167 part of V2O5With
And 0.112 part of Bi2O3。
In another embodiment, according to the mass fraction, ferrite powder includes 62.8 parts of Fe2O3, 15.964 parts
ZnO, 8.54 parts of NiO, 5.439 parts of CuO, 6.494 parts of glass dust, 0.179 part of Co2O3, 0.263 part of V2O5And
0.236 part of Bi2O3。
In another embodiment, according to the mass fraction, ferrite powder includes 63.099 parts of Fe2O3, 16.041 parts
ZnO, 8.581 parts of NiO, 4.433 parts of CuO, 7.344 parts of glass dust, 0.142 part of Co2O3, 0.167 part of V2O5With
And 0.109 part of Bi2O3。
Specifically, according to the mass fraction, glass dust includes following component：
In one embodiment, the sintering temperature of ferrite powder is below 900 DEG C.
Specifically, the sintering temperature of ferrite powder is 850 DEG C~875 DEG C.
Specifically, ZnO accountings are higher, the initial permeability of product is higher, and saturation induction density is lower.CuO contents are got over
Low, the density of product declines and causes the initial permeability to reduce after sintering, and saturation induction density is also lower.The ratio of auxiliary element
Influence of the example change to product initial permeability and saturation induction density is all larger.The content of glass dust is higher will to reduce product
The initial permeability and saturation induction density of product, its content is reduced in the case where sizing material forming is functional as far as possible.
Above-mentioned ferrite powder contains appropriate ZnO, NiO to adjust magnetic conductivity the performance μ i and magnetic induction density B s of material
To adapt to Qi standard requirement of the material in wireless charging.3 parts~6.5 parts appropriate CuO are added in nickel-zinc ferrite can be with
Reduce ferrite sintered temperature, but the excessive addition of ratio of CuO can then be separated out with dephasign in sintering in grain boundaries, be produced
Give birth to stress and cause that the inductor temperature characteristic of material is reduced.Glass dust is added to cause that ferrite obtains the performance of pulp-like, glass
SiO in glass powder2May also function as suppressing the effect of coarse grains, reduce sintering temperature.Appropriate Co2O3、V2O5And Bi2O3Make
For simultaneously the ferrite sintered temperature of sintering aid reduction can form liquid phase in ferritic crystal boundary, increase ferrite after sintering
Consistency, strengthen magnetic induction intensity.Through experimental test, the ferrite powder sintering temperature of this component is relatively low, can reach
Burnt altogether with coil slurry, so as to improve the electric conductivity of wireless charging device.
Achievable conductive coil burns altogether with ferrite during above-mentioned ferrite powder is applied to wireless charging, increases wireless charging
Equipment charge efficiency, reduces it and is taken up space.
Refer to Fig. 1, in one embodiment, the preparation method of above-mentioned ferrite powder comprise the following steps S110~
S150。
S110, based on the mass fraction of ferrite powder, by 59 parts~68 parts of Fe2O3, 14 parts~20 parts ZnO, 6 parts
The CuO of NiO and 3 part of~10 parts~6.5 parts is mixed to get the first mixture.
The gross mass of the ferrite powder according to required configuration, for example, need to prepare the ferrite powder of 1kg.According to each component
Shared proportioning, first by 59 parts~68 parts of Fe2O3, 14 parts~20 parts ZnO, NiO and 3 part of 6 parts~10 parts~6.5 parts
CuO be mixed to get the first mixture.
The first powder is obtained after S120, the first mixture wet ball grinding that will be obtained in S110 and drying.
Specifically, by Fe2O3, ZnO, NiO and CuO mixing after obtain the first mixture, gone to being added in the first mixture
Ionized water carries out wet ball grinding.
In one embodiment, Ball-milling Time is 4h~8h, and rotating speed is 300r/min~500r/min, after wet ball grinding
Powder dry 3h~5h under the conditions of 100 DEG C~150 DEG C after obtain the first powder.
Preburning material is obtained after S130, the first powder pre-burning that will be obtained in S120.
First by Fe2O3, ZnO, NiO and CuO be mixed to get the first mixture, ball milling, and obtain the first powder after drying,
Then pre-burning, improves magnetic conductivity.
Specifically, by the operation that Preburning material is obtained after the first powder pre-burning, pre-burning is carried out under protective gas atmosphere, temperature
Spend is 790 DEG C~810 DEG C.
Further, protective gas atmosphere is nitrogen atmosphere, and the first powder is placed in into pre-burning in the environment of nitrogen atmosphere, is risen
Warm speed is 2 DEG C/min~4 DEG C/min, and control temperature is incubated 3h or so, so as to obtain Preburning material at 790 DEG C~810 DEG C.
S140, based on the mass fraction of ferrite powder, 5.5 parts~8.5 parts of glass dust, 0.10 is added in Preburning material
Part~0.20 part of Co2O3, 0.15 part~0.30 part of V2O5And 0.10 part~0.30 part of Bi2O3Obtain the second mixture.
First by Fe2O3, ZnO, NiO and CuO be mixed to get the first mixture pre-burning and obtain Preburning material, then by ferrite
The mass fraction meter of powder, adds 5.5 parts~8.5 parts of glass dust, 0.10 part~0.20 part of Co in Preburning material2O3、0.15
Part~0.30 part of V2O5And 0.10 part~0.30 part of Bi2O3Obtain the second mixture.Each component batch mixed, first will
Fe2O3, add glass dust after the component pre-burning such as ZnO, NiO and CuO, glass dust can increase ferritic viscosity, make
Obtain the performance that ferrite obtains pulp-like.Co2O3、V2O5And Bi2O3It is same as the ferrite sintered temperature of sintering aid reduction
When can form liquid phase in ferritic crystal boundary, increase ferritic consistency after sintering, strengthen magnetic induction intensity.
Ferrite powder is obtained after S150, the second mixture ball milling that will be obtained in S140.
Specifically, by the operation that ferrite powder is obtained after the second mixture ball milling, Ball-milling Time is 12h~16h, is turned
Speed is 300r/min~500r/min.
The preparation method of above-mentioned ferrite powder, first by Fe2O3, ZnO, NiO and CuO mixing after ball milling obtain the first powder
Material, then pre-burning obtains Preburning material, and afterwards in addition glass dust, glass dust can increase ferritic viscosity so that iron oxygen
Body obtains the performance of pulp-like, the SiO in glass dust2May also function as suppressing the effect of coarse grains, sintering is reduced in sintering
Temperature.Appropriate Co2O3、V2O5And Bi2O3As the ferrite sintered temperature of sintering aid reduction simultaneously in ferritic crystalline substance
Liquid phase can be formed in boundary, increases ferritic consistency after sintering, strengthen magnetic induction intensity.Ferrite powder prepared by this method
Material sintering temperature is relatively low, can reach and be burnt altogether with coil slurry, so as to improve the electric conductivity of wireless charging device.
Additionally, the present invention also provides the ferrite slurry of an implementation method, the ferrite slurry include organic solvent and
Above-mentioned ferrite powder.
Specifically, organic solvent can be selected from least one in terpinol and ethyl cellulose.Terpinol or ethyl are fine
Dimension element can be good at mixing above-mentioned ferrite powder, so as to form slurry form.
Specifically, the weight of organic solvent accounts for the 5wt%~10wt% of ferrite slurry gross weight, such as 8wt%.
Above-mentioned ferrite slurry, organic solvent coordinates with glass dust so that ferrite slurry forms thick.Ferrite is starched
Material can be directly printed or is printed upon on product, so as to realize being closed with conductive coil co-sintering.
Refer to Fig. 2, in one embodiment, the preparation method of above-mentioned ferrite slurry comprise the following steps S210~
S220。
S210, offer ferrite powder.
Specifically, the ferrite powder is according to the mass fraction, including following component：
Further, the ferrite powder is prepared by the preparation method S110~S150 of above-mentioned ferrite powder.
S220, will the ferrite powder in S210 and organic solvent mix after more than 6h is sanded, obtain ferrite slurry.
Specifically, organic solvent can be selected from least one in terpinol and ethyl cellulose.Terpinol or ethyl are fine
Dimension element can be good at mixing above-mentioned ferrite powder, so as to form slurry form.
Specifically, being sanded on nanometer sand mill, the sand milling time is more than 6h, such as 6h~12h.By being sanded
Afterwards, slurry is well mixed, and can directly print or be printed upon on product.
The preparation method of above-mentioned ferrite slurry, more than 6h is sanded after ferrite powder and organic solvent are mixed, and is obtained
Ferrite slurry is well mixed, and can directly print or be printed upon on product, so as to realize being closed with conductive coil co-sintering.
Additionally, the present invention also provides a kind of wireless charging device, the wireless charging device includes conductive coil and covering
Ferrite layer on conductive coil.Fig. 3 is referred to, S310~S330 is prepared wireless charging device by the following method.
S310, offer substrate.
Specifically, wireless charging device can be used for any required electronic equipment for realizing wireless charging function.Such as mobile phone,
Wrist-watch, computer etc..Specifically, substrate can be the shell of above-mentioned electronic equipment.
In one embodiment, the material of substrate can be zirconia ceramics.
S320, covering coil slurry and the ferrite slurry on substrate.
Specifically, ferrite slurry is according to the mass fraction, including following component：
Specifically, the solvent of ferrite slurry is organic solvent.Further, organic solvent can be selected from terpinol and second
At least one in base cellulose.
Further, the ferrite slurry is prepared by the preparation method S210~S220 of above-mentioned ferrite slurry.
S320, sintering 4h~8h under the conditions of 850 DEG C~875 DEG C, coil slurry form conductive coil, ferrite slurry shape
Into ferrite layer, wireless charging device is obtained.
Specifically, being sintered using vacuum sintering furnace, it is sintered in being carried out under the atmosphere of protective gas such as nitrogen.Sintering
Temperature control is incubated 4h~8h at 850 DEG C~875 DEG C.After being sintered at 850 DEG C~875 DEG C relatively low temperature, coil slurry shape
Into conductive coil, ferrite slurry forms ferrite layer, realizes conductive coil and is closed with ferrite layer co-sintering.
The ferrite slurry of said components can be sintered under the conditions of 850 DEG C~875 DEG C, and sintering temperature is relatively low, Neng Gouyu
Coil slurry realizes that co-sintering is closed, and without by glue bonding, obtained wireless charging device conducts electricity very well.
Above-mentioned wireless charging device, due to being closed with coil slurry co-sintering using ferrite slurry, can increase wireless charging
The charge efficiency of electric equipment reduces it and is taken up space.Design space is bigger, more meets the structure and parameter request of product.Improve
The problem that existing wireless charging device can only be realized on a single plane, realizes the more complicated product wireless charging of less structure
Function.
It is below specific embodiment part.
Following examples unless otherwise instructed, the experimental technique of unreceipted actual conditions, generally according to normal condition.
Embodiment 1~9
The composition proportion of each embodiment in table 1 is pressed respectively by Fe2O3, ZnO, NiO and CuO mixing after carry out wet ball grinding
The first powder is mixed to get, Ball-milling Time is 8h, rotating speed 300r/min.First powder is dried into 3h at 120 DEG C.After drying
The first powder carry out pre-burning in vacuum sintering furnace after obtain Preburning material, pre-burning in the environment of nitrogen temperature control 790
DEG C~810 DEG C of pre-burning insulation 3h, heating rate control is in 2 DEG C/min.The composition proportion of each embodiment in table 1 is pressed respectively in pre-burning
Glass dust, the Co added in material2O3、V2O5And Bi2O3Afterwards, iron oxygen is obtained after rotating speed is for the condition ball milling 12h of 400r/min
Body powder.6h is sanded on nanometer sand mill after ferrite powder terpinol is mixed and obtains ferrite slurry.Terpinol is accounted for always
The 8wt% of weight ferrite slurry.Ferrite slurry obtained in each embodiment is attached to tender sample surfaces respectively, nothing is formed
Line charging equipment, ferrite slurry support size is 40mm × 40mm × 0.08mm.In the environment of nitrogen in vacuum sintering furnace
It is sintered, sintering temperature is controlled at 850 DEG C, and soaking time is 6h.
Table 1：The component proportion of embodiment 1~9
In the case where frequency is 150KHz, tender sample covering iron is tested using Agilent-4294A types electric impedance analyzer respectively
The initial permeability μ i of the embodiment wireless charging device obtained after oxysome slurry and sintering, using SY8217 type B-H analyzers
The saturation induction density Bs of tender sample is tested, as a result such as table 2.
Table 2：The test result of embodiment 1~9
| Embodiment | Initial permeability μ i (H/m) | Saturation induction density Bs (mT) |
| 1 | 621 | 784 |
| 2 | 894 | 394 |
| 3 | 541 | 431 |
| 4 | 784 | 846 |
| 5 | 564 | 758 |
| 6 | 1254 | 337 |
| 7 | 524 | 1043 |
| 8 | 764 | 703 |
| 9 | 894 | 367 |
Above test data shows that, by adjusting the component proportion of ferrite powder, realization is sintered under cryogenic.Respectively
The performance of the product of embodiment can reach the Qi standards in wireless charging：Initial permeability μ i >=500H/m, saturation induction
Intensity Bs >=300mT.
Embodiment described above only expresses several embodiments of the invention, and its description is more specific and detailed, but simultaneously
Therefore the limitation to the scope of the claims of the present invention can not be interpreted as.It should be pointed out that for one of ordinary skill in the art
For, without departing from the inventive concept of the premise, various modifications and improvements can be made, these belong to guarantor of the invention
Shield scope.Therefore, the protection domain of patent of the present invention should be determined by the appended claims.
Claims (10)
1. a kind of ferrite powder, it is characterised in that according to the mass fraction, including following component：
2. ferrite powder according to claim 1, it is characterised in that according to the mass fraction, including following component：
3. ferrite powder according to claim 1, it is characterised in that according to the mass fraction, the glass dust is included such as
Lower component：
4. the preparation method of the ferrite powder as described in any one of claims 1 to 3, it is characterised in that comprise the following steps：
Based on the mass fraction of the ferrite powder, by 59 parts~68 parts of Fe2O3, 14 parts~20 parts ZnO, 6 parts~10 parts
NiO and 3 part~6.5 parts of CuO be mixed to get the first mixture；
The first powder is obtained by the first mixture wet ball grinding and after drying；
Preburning material will be obtained after the first powder pre-burning；
Based on the mass fraction of the ferrite powder, 5.5 parts~8.5 parts of glass dust, 0.10 is added in the Preburning material
Part~0.20 part of Co2O3, 0.15 part~0.30 part of V2O5And 0.10 part~0.30 part of Bi2O3Obtain the second mixture；
And
The ferrite powder will be obtained after the second mixture ball milling.
5. the preparation method of ferrite powder according to claim 4, it is characterised in that described by first mixture
Obtained after wet ball grinding and drying in the operation of the first powder, Ball-milling Time is 4h~8h, rotating speed is 300r/min~500r/
Min, the powder after wet ball grinding obtains first powder after drying 3h~5h under the conditions of 100 DEG C~150 DEG C.
6. the preparation method of ferrite powder according to claim 4, it is characterised in that described that first powder is pre-
Obtained after burning in the operation of Preburning material, the pre-burning is carried out under protective gas atmosphere, temperature is 790 DEG C~810 DEG C.
7. the preparation method of ferrite powder according to claim 4, it is characterised in that described by second mixture
Obtained after ball milling in the operation of the ferrite powder, Ball-milling Time is 12h~16h, rotating speed is 300r/min~500r/min.
8. a kind of ferrite slurry, it is characterised in that the iron including organic solvent and as described in any one of claims 1 to 3
Ferromagnetic powder.
9. the preparation method of ferrite slurry as claimed in claim 8, it is characterised in that comprise the following steps：
Ferrite powder such as any one of claims 1 to 3 is provided；And
More than 6h is sanded after the ferrite powder and organic solvent are mixed, the ferrite slurry is obtained.
10. a kind of wireless charging device, it is characterised in that including conductive coil and the iron oxygen being covered on the conductive coil
Body layer, the wireless charging device is prepared by the following method and obtains：
Substrate is provided；
Coil slurry and ferrite slurry as described in claim 8 are covered on substrate；And
4h~8h is sintered under the conditions of 850 DEG C~875 DEG C, the coil slurry forms conductive coil, the ferrite slurry shape
Into the ferrite layer, the wireless charging device is obtained.
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