CN108503351A - A kind of wireless charging antifreeze plate and preparation method - Google Patents
A kind of wireless charging antifreeze plate and preparation method Download PDFInfo
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- CN108503351A CN108503351A CN201810534132.0A CN201810534132A CN108503351A CN 108503351 A CN108503351 A CN 108503351A CN 201810534132 A CN201810534132 A CN 201810534132A CN 108503351 A CN108503351 A CN 108503351A
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Abstract
A kind of wireless charging antifreeze plate of present invention offer and preparation method.The present invention is by the way that after substances, spraying granulation, the compression mouldings such as feed proportioning, tabletting, low temperature presintering, the micro auxiliary material of incorporation, process of passing through tunnel kiln dumping, bell-type furnace sintering and slice prepare high Bs, low-loss antifreeze plate.Meanwhile the preparation method of wireless charging provided by the invention antifreeze plate can prepare antifreeze plate in batches, to meet production requirement.
Description
Technical field
The present invention relates to wireless charging technical field more particularly to a kind of wireless charging antifreeze plate and preparation methods.
Background technology
Wireless charging is as a kind of safety, fashion, easily New-type charge mode, increasingly by the blueness of consumers in general
It looks at, and is grown rapidly in the consumer electronics products such as mobile phone, computer field.
During the work time, respectively there are one coil, transmitting end-coil is connected with wireless charging device for transmitting terminal and receiving terminal
Line power supply simultaneously generates electromagnetic signal, and the electromagnetic signal of the coil-induced transmitting terminal of receiving terminal charges the battery to generate electric current.
The magnetic field intensity of the antifreeze plate energy intensifier coil added is pasted on transmitting terminal, while there is higher magnetic convergence effect；In receiving terminal
Placing antifreeze plate prevents metallic conductor from interfering the decaying in magnetic field, plays the role of metal isolation, prevents energy dissipation, raising from filling
Electrical efficiency.Therefore, the impact of performance of antifreeze plate plays an important role in wireless charging.
Currently, antifreeze plate generally selects the MnZn ferrite materials with high saturated magnetic induction Bs and low loss characteristic
Material.The preparation process of antifreeze plate is usually：Sorting-stock-mixing-pre-burning-sand milling-slurrying-mist projection granulating-powder-processed at
Type-sintering-grinding.The antifreeze plate prepared by above-mentioned technical process is usually 15mm or so.It is larger-size when needing to prepare
Antifreeze plate, and when central bore is smaller, as diameter 50mm, central bore aperture 5mm when, since antifreeze plate size is larger,
It is not sufficiently reacted in sintering process, leads to that the Bs for the antifreeze plate that the above method is prepared is relatively low, loss is higher, thus in nothing
Micro USB electric equipment cannot play the role of the magnetic field intensity of intensifier coil, convergence magnetism, isolating metal etc..
Invention content
A kind of wireless charging antifreeze plate of present invention offer and preparation method, are being made with solving existing antifreeze plate preparation method
When standby larger-size antifreeze plate, the Bs of antifreeze plate is relatively low, the higher problem of loss.
The present invention provides a kind of preparation method of wireless charging antifreeze plate, which includes：
S01：By the raw material for preparing antifreeze plate according to compressing tablet process after mixing is matched, material piece is obtained.
It since the raw material for preparing antifreeze plate is uncertain, and matches and does not know, therefore, using wireless charging provided by the present application
Before the preparation method of electricity antifreeze plate prepares antifreeze plate, need former according to preset raw material components and raw material proportioning mixing
Material, to form uniform mixed raw material.
In this application, raw material preferentially selects Fe2O3、Mn3O4And ZnO, and its mass ratio is respectively Fe2O369.5%,
Mn3O423% and ZnO7.5%.In addition, raw material also preferentially selects Fe2O3, MnO and ZnO, and its mass ratio is respectively Fe2O365~
73%, MnO14~26% and ZnO3~16%.To make the antifreeze plate being prepared that there is higher Bs and lower loss,
The purity of each component minimum 99.3% in raw material.
Mixed raw material of the proportioning after uniform is handled by tabletting machine, forms sheet-shaped material piece.The mixing of powdery is former
After material is pressed into sheet-shaped material piece, the feelings such as the mixed raw material of powdery can be avoided to be bonded in rotary kiln pre-burning, be difficult to flow
Condition, and then it is convenient for large batch of industrial production.
S02：By material piece pre-burning under the conditions of temperature is 950 ± 5 DEG C, until the material piece after pre-burning shakes
Real density is 1.3~1.5g/cm3。
For the briquettability of improvement powder, reduction inprocess shrinkage and deformation and make that solid phase reaction occurs between each raw material, i.e.,
Anisotropic permanent magnetism, which all becomes ferrite or soft magnetic part, becomes ferrite, needs to carry out material piece into pre-burning in rotary kiln.Together
When, due to Zn readily volatilized expansions at a temperature of 700-900 DEG C, material piece energy during pre-burning becomes ferritic
Abnormal expansion is enough eliminated, and then improves the performance of antifreeze plate.
If calcined temperature is too low, the solid-phase reaction velocity between each component is slower, is unfavorable for producing.If calcined temperature mistake
Height when solid phase reaction then occurring between each component, is easy to cause oxygen loss, metal volatilizees and the particle of reaction product is larger, shadow
Ring subsequent sand milling.Therefore, in this application, calcined temperature is 950 ± 5 DEG C, when pre-burning a length of 40min, until after pre-burning
The tap density of material piece is 1.3~1.5g/cm3.More preferably, the calcined temperature of material piece is 950 DEG C.
S03：The material piece after pre-burning is crushed, crushed material is formed.
S04：The crushed material, auxiliary material, polyvinyl alcohol glue and deionized water are mixed, mixture, the mixing are formed
It is 0.8~1.5 μm that material, which is sanded to granularity,；The auxiliary material includes calcium carbonate, vanadic anhydride, niobium pentaoxide, fe and three
Aoxidize two cobalts.
Crushed material, auxiliary material, polyvinyl alcohol glue and deionized water are mixed, mixture is formed.In this application, accessory package
Calcium carbonate, vanadic anhydride, niobium pentaoxide, fe and cobalt sesquioxide are included, and the quality of each auxiliary material is respectively crushed material
0.3 ‰, 0.3 ‰, 0.2 ‰, 1 ‰ and the 3.5 ‰ of gross mass.I.e. the quality of calcium carbonate is the 0.3 ‰ of crushed material quality, five oxidations
The quality of two vanadium is the 0.3 ‰ of crushed material quality, and the quality of niobium pentaoxide is the 0.2 ‰ of crushed material quality, the matter of fe
Amount is the 1 ‰ of crushed material quality and the quality of cobalt sesquioxide is crushed material quality 3.5 ‰.Further, when preparation is every magnetic
When piece is soft magnetism, 3 ‰ of quality no more than crushed material quality of each auxiliary material.
In addition, polyvinyl alcohol glue is using common polyvinyl alcohol glue in the preparation of existing antifreeze plate, the application is not to this
It is defined.In the application, the mass ratio of polyvinyl alcohol glue and crushed material is (0.5~1.5):100, deionized water with crush
The mass ratio of material is 1:2.
The purpose that mixed accessories, polyvinyl alcohol glue and deionized water are adulterated in crushed material is so that product has centainly
Characteristic.Such as, calcium carbonate can increase the resistivity of antifreeze plate, improve its high frequency characteristics；Cobalt sesquioxide can be improved every magnetic
The temperature characterisitic of piece；Fe can prevent iron deficiency from reacting；Vanadic anhydride and niobium pentaoxide can reduce the damage of antifreeze plate
Consumption, and improve the Bs of antifreeze plate.
Mixture is put into sand mill and is sanded, to promote solid phase reaction, and promotes densification and the crystal grain life of antifreeze plate
It is long.Meanwhile can increase activity by the way that refinement is sanded, in order to the solid phase reaction in sintering process.Mistake of the mixture in sand milling
Cheng Zhong, sand milling rotating speed are 2000r/min, and the sands milling time is 30~180min, until mixture is sanded to granularity as 0.8~
1.5μm。
S05：By the mixture spraying granulation after sand milling, spheric granules is obtained.
Mixture after sand milling is utilized into spray tower spraying granulation, obtains spheric granules, wherein it is required that the grain of spheric granules
Degree is 60~180 mesh, and water content is less than 1%, and apparent density is 1.3~1.45g/cm3, flow angle is 25 °~30 °.At this point, system
Standby obtained spheric granules helps to be pressed into magnetic pole, and the magnetic pole suppressed is more advantageous to the later stage and adequately drains dumping.
S06：The spheric granules is pressed into magnetic pole；The green density of the magnetic pole is 3.0 ± 0.10g/cm3。
Spheric granules is pressed into higher than 20mm, the magnetic pole that outer diameter is 50mm.During compacting forms magnetic pole, it is desirable that
The green density of magnetic pole is 3.0 ± 0.10g/cm3.When the green density of magnetic pole is 3.0 ± 0.10g/cm3When, inside magnetic pole respectively at
Point the distance between be conducive to draining dumping in continuous tunnel furnace, the chemical reaction process being more advantageous in sintering process and physics become
Change process.
S07：The magnetic pole slowly fully drains dumping in continuous tunnel furnace.
In high temperature sintering, if also retaining polyvinyl alcohol glue and deionized water in magnetic pole, hold in high-temperature sintering process
Easily there is magnetic pole slight crack, influences solid phase reaction and magnetic circuit.For this purpose, after the mixture after being sanded is pressed into magnetic pole, magnetic pole is placed in
In continuous tunnel furnace, polyvinyl alcohol glue and deionized water in magnetic pole slowly, are fully all discharged by way of false burn.It is anti-
Only solid phase reaction occurs during draining dumping for magnetic pole, and the maximum temperature of continuous tunnel furnace is 600 DEG C.In general, the drainage of magnetic pole
Glue process is about 6h.
S08：To drain the magnetic pole after dumping nitrogen pressure be 0.2~0.9Mpa, compressed air pressure be 0.2~
0.8Mpa, highest holding temperature are 1330~1450 DEG C, highest heating rate is 4 DEG C/min and maximum cooling rate is 4.5
DEG C/min under conditions of be sintered, obtain sintering magnetic pole.
It is sintered in the state of less than material melt temp, by burning shrinkage (densification) and crystal grain-growth, ultimately produces
Ferritic overall process.Therefore, sintering process is the chemical process and physical process of material, wherein chemical process includes oxidation
Reduction, solid solution are generated and are decomposed；Physical process includes contraction, polycrystalline growth and phase change.In general, the grain size of material is smaller,
The surface energy of material is bigger, and sintering power is bigger, and reaction speed is faster, and sintering temperature is lower, therefore, before magnetic pole compression moulding
Refinement is sanded can reduce the grain size of material as far as possible, so that sintering temperature is relatively low.
In addition, due to chemical process and physical process that sintering process is material, to prevent sintering process magnetic pole and other
Material reacts, and the sintering atmosphere of magnetic pole is nitrogen.
The detailed process of sintering includes initial stage, mid-term and latter stage three phases.In initial stage of sintering, particle contacts with each other, hole
Gap dispersion perforation.With the raising of temperature, porosity constantly declines, and contraction continues to increase, and density constantly rises.In sintering
Phase, with the raising of temperature, the interface between each particle gradually merges, and hole is gradually closed, and porosity reduces rapidly, and shrinks
Significantly increase.In sintering latter stage, temperature further increases, and closed hole is reduced, and density is significant to be increased.If temperature is into one
Step increases again, then pressure increased dramatically in dead-end pore, be difficult to have contraction again, or even can become larger, and product properties is made to dislike
Change.After maximum temperature keeps the temperature a period of time, need to reduce temperature, to take out sintered magnetic pole.In the process that temperature reduces
In, the reduction speed of strict temperature control is needed, to prevent sintering magnetic pole cracking.
To sum up, to prepare the antifreeze plate of low-loss, high Bs, atmosphere, pressure, the highest heat preservation of sintering process should strictly be controlled
Temperature, highest heating rate and maximum cooling rate.In this application, magnetic pole is 0.2~0.9Mpa, compresses sky in nitrogen pressure
Atmospheric pressure is 0.2~0.8Mpa, highest holding temperature is 1330~1450 DEG C, highest heating rate is 4 DEG C/min and maximum
Cooling rate is sintered under conditions of being 4.5 DEG C/min in bell-type furnace, obtains sintering magnetic pole.
S09：The sintering magnetic pole wire cutting obtains antifreeze plate.
The sintering magnetic pole being prepared is subjected to wire cutting using diamond, obtains the antifreeze plate for needing thickness.
The present invention also provides a kind of wireless charging antifreeze plate, which is prepared using the above method.
The technical solution that the embodiment of the present invention provides can include the following benefits：
A kind of wireless charging antifreeze plate of present invention offer and preparation method.The preparation method includes：Antifreeze plate will be prepared
Raw material according to proportioning compressing tablet process after mixing, obtain material piece；By the material piece temperature be 950 ± 5 DEG C of conditions
Lower pre-burning, until the tap density of the material piece after pre-burning is 1.3~1.5g/cm3；By the material piece powder after pre-burning
It is broken, form crushed material；The crushed material, auxiliary material, polyvinyl alcohol glue and deionized water are mixed, mixture is formed, it is described mixed
It is 0.8~1.5 μm to close material and be sanded to granularity；By the mixture spraying granulation after sand milling, spheric granules is obtained；By the ball
Shape particle is pressed into magnetic pole；The green density of the magnetic pole is 3.0 ± 0.10g/cm3；The magnetic pole is slowly filled in continuous tunnel furnace
Divide draining dumping；To drain the magnetic pole after dumping nitrogen pressure be 0.2~0.9Mpa, compressed air pressure be 0.2~
0.8Mpa, highest holding temperature are 1330~1450 DEG C, highest heating rate is 4 DEG C/min and maximum cooling rate is 4.5
DEG C/min under conditions of be sintered, obtain sintering magnetic pole；The sintering magnetic pole wire cutting obtains antifreeze plate.The present invention passes through in raw material
After substances, spraying granulation, the compression mouldings such as dispensing, tabletting, low temperature presintering, the micro auxiliary material of incorporation, process of passing through tunnel kiln dumping, bell jar
Stove is sintered and slice, prepares high Bs, low-loss antifreeze plate.Meanwhile the system of wireless charging antifreeze plate provided by the invention
Preparation Method can prepare antifreeze plate in batches, to meet production requirement.
It should be understood that above general description and following detailed description is only exemplary and explanatory, not
It can the limitation present invention.
Description of the drawings
In order to illustrate more clearly of the technical solution of the application, letter will be made to attached drawing needed in the embodiment below
Singly introduce, it should be apparent that, for those of ordinary skills, without having to pay creative labor,
Other drawings may also be obtained based on these drawings.
Fig. 1 is the flow diagram of the preparation method of wireless charging antifreeze plate provided in an embodiment of the present invention.
Specific implementation mode
Attached drawing 1 is please referred to, attached drawing 1 shows the preparation method of wireless charging antifreeze plate provided by the embodiments of the present application
Flow diagram.The description of following specific embodiments is based on attached drawing 1.
Embodiment 1
The embodiment of the present application provides a kind of preparation method of wireless charging antifreeze plate, which includes：
S101：It is Fe that the raw material of antifreeze plate, which will be prepared, according to mass ratio2O369.5%, Mn3O423% and ZnO7.5% is mixed
Compressing tablet process after uniformly, obtains material piece.
S102：By material piece pre-burning under the conditions of temperature is 950 DEG C, until the jolt ramming of the material piece after pre-burning
Density is 1.3g/cm3。
S103：The material piece after pre-burning is crushed, crushed material is formed.
S104：Crushed material, auxiliary material, polyvinyl alcohol glue and deionized water are mixed, mixture is formed.When mixture is sanded
Rotating speed be 2000r/min, the sands milling time be 180min, be sanded to granularity be 0.8 μm.Auxiliary material includes calcium carbonate, five oxidations two
Vanadium, niobium pentaoxide, fe and cobalt sesquioxide, wherein calcium carbonate, vanadic anhydride, niobium pentaoxide, fe and three
The quality for aoxidizing two cobalts is respectively 0.3 ‰, 0.3 ‰, 0.2 ‰, 1 ‰ and the 3.5 ‰ of the crushed material gross mass.Crushed material and institute
The mass ratio for stating polyvinyl alcohol glue is 100:1.5.The mass ratio of deionized water and crushed material is 1:2.
S105：By the mixture spraying granulation after sand milling, spheric granules is obtained.The granularity of spheric granules is 60 mesh,
Water content is less than 1%, apparent density 1.3g/cm3, flow angle is 25 °.
S106：The spheric granules is pressed into magnetic pole；The green density of the magnetic pole is 3.0g/cm3。
S107：The magnetic pole slowly fully drains dumping in the continuous tunnel furnace that temperature is 600 DEG C.
S108：To drain the magnetic pole after dumping nitrogen pressure be 0.2Mpa, compressed air pressure 0.2Mpa, most
High holding temperature is 1330 DEG C, heating rate is 4 DEG C/min and cooling rate is is sintered under conditions of 4.5 DEG C/min, is obtained
It is sintered magnetic pole.
S109：The sintering magnetic pole wire cutting obtains antifreeze plate.
The embodiment of the present application provides a kind of wireless charging antifreeze plate, which is prepared using the above method.
Embodiment 2
The embodiment of the present application provides a kind of preparation method of wireless charging antifreeze plate, which includes：
S201：It is Fe that the raw material of antifreeze plate, which will be prepared, according to mass ratio2O369.5%, Mn3O423% and ZnO7.5% is matched
Compressing tablet process after mixing obtains material piece.
S202：By material piece pre-burning under the conditions of temperature is 948 DEG C, until the jolt ramming of the material piece after pre-burning
Density is 1.5g/cm3。
S203：The material piece after pre-burning is crushed, crushed material is formed.
S204：Crushed material, auxiliary material, polyvinyl alcohol glue and deionized water are mixed, mixture is formed.When mixture is sanded
Rotating speed be 2000r/min, the sands milling time be 120min, be sanded to granularity be 1.4 μm.Auxiliary material includes calcium carbonate, five oxidations two
Vanadium, niobium pentaoxide, fe and cobalt sesquioxide, wherein calcium carbonate, vanadic anhydride, niobium pentaoxide, fe and three
The quality for aoxidizing two cobalts is respectively 0.3 ‰, 0.3 ‰, 0.2 ‰, 1 ‰ and the 3.5 ‰ of the crushed material gross mass.Crushed material and institute
The mass ratio for stating polyvinyl alcohol glue is 100:1.2.The mass ratio of deionized water and crushed material is 1:2.
S205：By the mixture spraying granulation after sand milling, spheric granules is obtained.The granularity of spheric granules is 180 mesh,
Water content is less than 1%, apparent density 1.45g/cm3, flow angle is 30 °.
S206：The spheric granules is pressed into magnetic pole；The green density of the magnetic pole is 2.95g/cm3。
S207：The magnetic pole slowly fully drains dumping in the continuous tunnel furnace that temperature is 550 DEG C.
S208：To drain the magnetic pole after dumping nitrogen pressure be 0.8Mpa, compressed air pressure 0.6Mpa, most
High holding temperature is 1440 DEG C, heating rate is 2.5 DEG C/min and cooling rate is is sintered under conditions of 2 DEG C/min, is obtained
It is sintered magnetic pole.
S209：The sintering magnetic pole wire cutting obtains antifreeze plate.
The embodiment of the present application provides a kind of wireless charging antifreeze plate, which is prepared using the above method.
Embodiment 3
The embodiment of the present application provides a kind of preparation method of wireless charging antifreeze plate, which includes：
S301：It is Fe that the raw material of antifreeze plate, which will be prepared, according to mass ratio2O365%, the mixing of MnO26% and ZnO9% proportionings is equal
Compressing tablet process after even, obtains material piece.
S302：By material piece pre-burning under the conditions of temperature is 945 DEG C, until the jolt ramming of the material piece after pre-burning
Density is 1.3g/cm3。
S303：The material piece after pre-burning is crushed, crushed material is formed.
S304：Crushed material, auxiliary material, polyvinyl alcohol glue and deionized water are mixed, mixture is formed.When mixture is sanded
Rotating speed be 2000r/min, the sands milling time be 90min, be sanded to granularity be 1.2 μm.Auxiliary material includes calcium carbonate, five oxidations two
Vanadium, niobium pentaoxide, fe and cobalt sesquioxide, wherein calcium carbonate, vanadic anhydride, niobium pentaoxide, fe and three
The quality for aoxidizing two cobalts is respectively 0.3 ‰, 0.3 ‰, 0.2 ‰, 1 ‰ and the 3.5 ‰ of the crushed material gross mass.Crushed material and institute
The mass ratio for stating polyvinyl alcohol glue is 100:0.8.The mass ratio of deionized water and crushed material is 1:2.
S305：By the mixture spraying granulation after sand milling, spheric granules is obtained.The granularity of spheric granules is 100 mesh,
Water content is less than 1%, apparent density 1.4g/cm3, flow angle is 28 °.
S306：The spheric granules is pressed into magnetic pole；The green density of the magnetic pole is 3.05g/cm3。
S307：The magnetic pole slowly fully drains dumping in the continuous tunnel furnace that temperature is 500 DEG C.
S308：To drain the magnetic pole after dumping nitrogen pressure be 0.3Mpa, compressed air pressure 0.3Mpa, most
High holding temperature is 1420 DEG C, heating rate is 4 DEG C/min and cooling rate is is sintered under conditions of 4.5 DEG C/min, is obtained
It is sintered magnetic pole.
S309：The sintering magnetic pole wire cutting obtains antifreeze plate.
The embodiment of the present application provides a kind of wireless charging antifreeze plate, which is prepared using the above method.
Embodiment 4
The embodiment of the present application provides a kind of preparation method of wireless charging antifreeze plate, which includes：
S401：It is Fe that the raw material of antifreeze plate, which will be prepared, according to mass ratio2O373%, MnO14% and ZnO13% is uniformly mixed
Compressing tablet process afterwards obtains material piece.
S402：By material piece pre-burning under the conditions of temperature is 952 DEG C, until the jolt ramming of the material piece after pre-burning
Density is 1.4g/cm3。
S403：The material piece after pre-burning is crushed, crushed material is formed.
S404：Crushed material, auxiliary material, polyvinyl alcohol glue and deionized water are mixed, mixture is formed.When mixture is sanded
Rotating speed be 2000r/min, the sands milling time be 60min, be sanded to granularity be 1 μm.Auxiliary material include calcium carbonate, vanadic anhydride,
Niobium pentaoxide, fe and cobalt sesquioxide, wherein calcium carbonate, vanadic anhydride, niobium pentaoxide, fe and three oxygen
The quality for changing two cobalts is respectively 0.3 ‰, 0.3 ‰, 0.2 ‰, 1 ‰ and the 3.5 ‰ of the crushed material gross mass.Crushed material with it is described
The mass ratio of polyvinyl alcohol glue is 100:1.The mass ratio of deionized water and crushed material is 1:2.
S405：By the mixture spraying granulation after sand milling, spheric granules is obtained.The granularity of spheric granules is 120 mesh,
Water content is less than 1%, apparent density 1.42g/cm3, flow angle is 28 °.
S406：The spheric granules is pressed into magnetic pole；The green density of the magnetic pole is 3.0g/cm3。
S407：The magnetic pole slowly fully drains dumping in the continuous tunnel furnace that temperature is 580 DEG C.
S408：To drain the magnetic pole after dumping nitrogen pressure be 0.8Mpa, compressed air pressure 0.7Mpa, most
High holding temperature is 1400 DEG C, heating rate is 3.2 DEG C/min and cooling rate is is sintered under conditions of 4.2 DEG C/min, is obtained
To sintering magnetic pole.
S409：The sintering magnetic pole wire cutting obtains antifreeze plate.
The embodiment of the present application provides a kind of wireless charging antifreeze plate, which is prepared using the above method.
Embodiment 5
The embodiment of the present application provides a kind of preparation method of wireless charging antifreeze plate, which includes：
S501：It is Fe that the raw material of antifreeze plate, which will be prepared, according to mass ratio2O372%, MnO22% and ZnO16% is uniformly mixed
Compressing tablet process afterwards obtains material piece.
S502：By material piece pre-burning under the conditions of temperature is 955 DEG C, until the jolt ramming of the material piece after pre-burning
Density is 1.5g/cm3。
S503：The material piece after pre-burning is crushed, crushed material is formed.
S504：Crushed material, auxiliary material, polyvinyl alcohol glue and deionized water are mixed, mixture is formed.When mixture is sanded
Rotating speed be 2000r/min, the sands milling time be 30min, be sanded to granularity be 1.5 μm.Auxiliary material includes calcium carbonate, five oxidations two
Vanadium, niobium pentaoxide, fe and cobalt sesquioxide, wherein calcium carbonate, vanadic anhydride, niobium pentaoxide, fe and three
The quality for aoxidizing two cobalts is respectively 0.3 ‰, 0.3 ‰, 0.2 ‰, 1 ‰ and the 3.5 ‰ of the crushed material gross mass.Crushed material and institute
The mass ratio for stating polyvinyl alcohol glue is 100:0.5.The mass ratio of deionized water and crushed material is 1:2.
S505：By the mixture spraying granulation after sand milling, spheric granules is obtained.The granularity of spheric granules is 160 mesh,
Water content is less than 1%, apparent density 1.3g/cm3, flow angle is 30 °.
S506：The spheric granules is pressed into magnetic pole；The green density of the magnetic pole is 2.9g/cm3。
S507：The magnetic pole slowly fully drains dumping in the continuous tunnel furnace that temperature is 560 DEG C.
S508：To drain the magnetic pole after dumping nitrogen pressure be 0.5Mpa, compressed air pressure 0.5Mpa, most
High holding temperature is 1380 DEG C, heating rate is 3.5 DEG C/min and cooling rate is is sintered under conditions of 3.5 DEG C/min, is obtained
To sintering magnetic pole.
S509：The sintering magnetic pole wire cutting obtains antifreeze plate.
The embodiment of the present application provides a kind of wireless charging antifreeze plate, which is prepared using the above method.
Embodiment 6
The embodiment of the present application provides a kind of preparation method of wireless charging antifreeze plate, which includes：
S601：It is Fe that the raw material of antifreeze plate, which will be prepared, according to mass ratio2O372%, MnO25% and ZnO3% be after mixing
Compressing tablet process obtains material piece.
S602：By material piece pre-burning under the conditions of temperature is 955 DEG C, until the jolt ramming of the material piece after pre-burning
Density is 1.5g/cm3。
S603：The material piece after pre-burning is crushed, crushed material is formed.
S604：Crushed material, auxiliary material, polyvinyl alcohol glue and deionized water are mixed, mixture is formed.When mixture is sanded
Rotating speed be 2000r/min, the sands milling time be 30min, be sanded to granularity be 1.5 μm.Auxiliary material includes calcium carbonate, five oxidations two
Vanadium, niobium pentaoxide, fe and cobalt sesquioxide, wherein calcium carbonate, vanadic anhydride, niobium pentaoxide, fe and three
The quality for aoxidizing two cobalts is respectively 0.3 ‰, 0.3 ‰, 0.2 ‰, 1 ‰ and the 3.5 ‰ of the crushed material gross mass.Crushed material and institute
The mass ratio for stating polyvinyl alcohol glue is 100:0.5.The mass ratio of deionized water and crushed material is 1:2.
S605：By the mixture spraying granulation after sand milling, spheric granules is obtained.The granularity of spheric granules is 160 mesh,
Water content is less than 1%, apparent density 1.3g/cm3, flow angle is 30 °.
S606：The spheric granules is pressed into magnetic pole；The green density of the magnetic pole is 3.1g/cm3。
S607：The magnetic pole slowly fully drains dumping in the continuous tunnel furnace that temperature is 590 DEG C.
S608：To drain the magnetic pole after dumping nitrogen pressure be 0.9Mpa, compressed air pressure 0.8Mpa, most
High holding temperature is 1450 DEG C, heating rate is 3 DEG C/min and cooling rate is is sintered under conditions of 4 DEG C/min, is burnt
Tie magnetic pole.
S609：The sintering magnetic pole wire cutting obtains antifreeze plate.
The embodiment of the present application provides a kind of wireless charging antifreeze plate, which is prepared using the above method.
Those skilled in the art will readily occur to its of the present invention after considering specification and putting into practice the disclosure invented here
Its embodiment.This application is intended to cover the present invention any variations, uses, or adaptations, these modifications, purposes or
Person's adaptive change follows the general principle of the present invention and includes undocumented common knowledge in the art of the invention
Or conventional techniques.The description and examples are only to be considered as illustrative, and true scope and spirit of the invention are by following
Claim is pointed out.
It should be understood that the relational terms of such as " first " and " second " or the like be used merely to an entity or
Operation is distinguished with another entity or operation, and without necessarily requiring or implying between these entities or operation, there are any
This actual relationship or sequence.The invention is not limited in the precision architecture for being described above and being shown in the accompanying drawings,
And various modifications and changes may be made without departing from the scope thereof.The scope of the present invention is only limited by the attached claims
System.
Claims (10)
1. a kind of preparation method of wireless charging antifreeze plate, which is characterized in that including：
By the raw material for preparing antifreeze plate according to compressing tablet process after mixing is matched, material piece is obtained；
By material piece pre-burning under the conditions of temperature is 950 ± 5 DEG C, until the tap density of the material piece after pre-burning is
1.3~1.5g/cm3；
The material piece after pre-burning is crushed, crushed material is formed；
By the crushed material, auxiliary material, polyvinyl alcohol glue and deionized water mix, formed mixture, the mixture be sanded to
Granularity is 0.8~1.5 μm；The auxiliary material includes calcium carbonate, vanadic anhydride, niobium pentaoxide, fe and cobalt sesquioxide；
By the mixture spraying granulation after sand milling, spheric granules is obtained；
The spheric granules is pressed into magnetic pole；The green density of the magnetic pole is 3.0 ± 0.10g/cm3；
The magnetic pole slowly fully drains dumping in continuous tunnel furnace；
By drain dumping after the magnetic pole nitrogen pressure be 0.2~0.9Mpa, compressed air pressure be 0.2~0.8Mpa,
Highest holding temperature is 1330~1450 DEG C, highest heating rate is 4 DEG C/min and maximum cooling rate is 4.5 DEG C/min
Under the conditions of be sintered, obtain sintering magnetic pole；
The sintering magnetic pole wire cutting obtains antifreeze plate.
2. preparation method according to claim 1, which is characterized in that the granularity of the spheric granules is 60~180 mesh, is contained
Water is less than 1%, and apparent density is 1.3~1.45g/cm3, flow angle is 25 °~30 °.
3. preparation method according to claim 1, which is characterized in that the calcined temperature of the material piece is 950 DEG C.
4. preparation method according to claim 1, which is characterized in that the rotating speed when mixture is sanded is 2000r/
Min, sand milling time are 30~180min.
5. preparation method according to claim 1, which is characterized in that the raw material includes according to mass ratio
Fe2O369.5%, Mn3O423% and ZnO7.5%.
6. preparation method according to claim 1, which is characterized in that the raw material includes Fe according to mass ratio2O365~
73%, MnO14~26% and ZnO3~16%.
7. preparation method according to claim 1, which is characterized in that the calcium carbonate, the vanadic anhydride, described five
The quality for aoxidizing two niobiums, the fe and the cobalt sesquioxide be respectively the crushed material gross mass 0.3 ‰, 0.3 ‰,
0.2 ‰, 1 ‰ and 3.5 ‰.
8. preparation method according to claim 1, which is characterized in that the matter of the crushed material and the polyvinyl alcohol glue
Amount is than being 100:(0.5~1.5).
9. preparation method according to claim 1, which is characterized in that the maximum temperature of the continuous tunnel furnace is 600 DEG C.
10. a kind of wireless charging antifreeze plate, which is characterized in that the antifreeze plate is using any one of claim 1-9 institutes
The preparation method of the wireless charging stated antifreeze plate is prepared.
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN113744988A (en) * | 2021-09-01 | 2021-12-03 | 横店集团东磁股份有限公司 | Coating method of magnetic powder core powder, modified magnetic powder core powder and application thereof |
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