CN109704744A - A kind of wireless charging RX end iron ferrite and magnetic sheet and its manufacturing method - Google Patents
A kind of wireless charging RX end iron ferrite and magnetic sheet and its manufacturing method Download PDFInfo
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Abstract
The invention discloses a kind of wireless charging RX end iron ferrite and magnetic sheets and its manufacturing method, wherein the wireless charging formula of RX end iron ferrite includes principal component and adding ingredient, and principal component includes: the Fe of 66.0wt%~66.5wt% according to oxide weight meter2O3, 5.5wt%~6.1wt% NiO, 21.3wt%~22.0wt% ZnO, 6.0wt%~6.5wt% CuO；Adding ingredient includes SiO2、Co2O3、MoO3、CaCO3, wherein the percentage that each ingredient accounts for the total weight of principal component is respectively as follows: the SiO of 0.02wt%~0.10wt%2, 0.02wt%~0.10wt% Co2O3, 0.02wt%~0.10wt%d MoO3, 0.01wt%~0.10wt% CaCO3.The present invention can prepare magnetic permeability μ i with higher, lower power loss PcvWith higher saturation flux density BsNickel-zinc ferrite, apply it in wireless charging device, play the role of improve charging performance.
Description
Technical field
The present invention relates to Ferrite Material technical field more particularly to a kind of wireless charging RX end iron ferrite and magnetic
Piece and its manufacturing method.
Background technique
With making extensively for the portable electronic products such as smart phone, wearable wrist-watch, digital camera and tablet computer
With requirement of the people to charging is also higher and higher；Especially smart phone, powerful, software is abundant, and frequency of use is high,
Cause mobile phone power consumption amount very big, stand-by time is short, must charge repeatedly using these products, and dedicated wired charger carries not
It is convenient, and there are also electric leakage, Danger Electric shock risks etc. when charging, in practice at thing very troublesome.And every money electronics produces
Product have a dedicated charger, if user replaces electronic product, which just becomes electronic waste, not only waste of resource but also
It can environmental pollution.
When charging using wireless charging device electron product, there is no conducting wire company between electronic product and wireless charging device
It connects, can put and fill, and use can be taken away at any time, without the limitation of traditional connecting wire, charging is convenient, flexible, and
It can charge simultaneously to multiple electronic products, this has been to be concerned by more and more people wireless charging device.
Currently, the charging technique of more and more portable electronic products is gradually stepped to anury (contactless charging)
Into the rapid development of wireless charging technology.According to the difference of design principle and mechanism, the implementation of wireless charging can be according to not
With application band can be divided into three classes: it be electromagnetic resonance, higher frequency is electromagnetism spoke that low frequency, which is electromagnetic induction manifold type, medium-high frequency,
Penetrate formula.It is the most universal with electromagnetic induction method charging (Qi standard).The occasion of quick charge or large current charge, due to emission lines
Circle and receiving coil are separation, and system at work, has leakage inductance generation, coil mutual inductance becomes smaller, and then transfer efficiency is lower；
The problems such as there is also electromagnetic radiation.To solve the above-mentioned problems, the magnetic flux for needing to generate coil with magnetic conduction shielding material into
Row shielding, when transmitting coil end and receiving coil end are separately added into Ferrite Material as shielding material, can be improved coil
Between the coefficient of coup, and then improve efficiency of transmission.Transformer reason is mainly utilized in electromagnetic induction manifold type wireless charging technology
By and the law of electromagnetic induction.Transmitting terminal uses mains-supplied, and alternating current (is equivalent to primary line by emitting end-coil
Circle), magnetic field is converted electrical energy into, end-coil (being equivalent to transformer secondary coil) can be received by air borne and receive
Behind magnetic field, due to electromagnetic induction, electric current can be generated in receiving end, and then reach the power transmission at both ends.
There is amorphous nano-crystalline and the big mainstream shielding material of ferrite two on the market at present, amorphous nano-crystalline has high magnetic conductance
The advantages of rate and high saturation magnetic induction, but it is limited to the complexity of lamination process, manufacturing cost is higher, and ferrite sheet is still at present
Market first choice, thus prepare can be suitable for wireless charging Ferrite Material become this field developing direction it
One.
The disclosure of background above technology contents is only used for auxiliary and understands design and technical solution of the invention, not necessarily
The prior art for belonging to present patent application, no tangible proof show above content present patent application the applying date
In disclosed situation, above-mentioned background technique should not be taken to the novelty and creativeness of evaluation the application.
Summary of the invention
In order to solve the above technical problems, the present invention propose a kind of wireless charging RX end iron ferrite and magnetic sheet and its
Manufacturing method prepares magnetic permeability μ i with higher, lower power loss PcvWith higher saturation flux density BsNickel
Zn ferrite applies it in wireless charging device, plays the role of improving charging performance.
In order to achieve the above object, the invention adopts the following technical scheme:
One embodiment of the present of invention discloses a kind of wireless charging RX end iron ferrite, and formula includes principal component
And adding ingredient, the principal component include Fe2O3, NiO, ZnO, CuO, wherein the weight summation of each ingredient be 100wt%:
The adding ingredient includes SiO2、Co2O3、MoO3、CaCO3, wherein each ingredient accounts for the total weight of the principal component
Percentage is respectively as follows:
Preferably, each ingredient of the principal component and the adding ingredient is high pure raw material, and purity is respectively as follows: Fe2O3≥
99.5wt%, NiO >=99.5wt%, ZnO >=99wt%, CuO >=99wt%, SiO2>=99wt%, Co2O3>=99wt%, MoO3
>=99.5wt%, CaCO3>=99wt%.
One embodiment of the present of invention discloses a kind of manufacturing method of wireless charging RX end iron ferrite, including with
Lower step:
S1: raw material Fe is weighed according to the formula of above-mentioned wireless charging RX end iron ferrite2O3、NiO、ZnO、CuO、
SiO2、Co2O3、MoO3、CaCO3；
S2: the raw material of the principal component load weighted in step S1 is put into sand mill, carries out ball milling, slurry is made；
S3: the resulting slurry of step S2 is dried, powder is made；
S4: the resulting powder of step S3 is subjected to pre-burning, preburning powdered material is made；
S5: being put into ball mill for the resulting preburning powdered material of step S4, then by the adding ingredient load weighted in step S1
Raw material be also placed in ball mill, carry out ball milling, slurry be made；
S6: the resulting slurry of step S5 is dried, wireless charging RX end iron ferrite is made.
Preferably, the ball milling step in step S2 specifically includes: according to material: ball: water quality ratio 1:4:1.5, to sand mill
The zirconia ball and deionized water of diameter 1mm~5mm are added in tank, sets sand mill revolving speed as 200~250rpm, ball milling 4h~
After 10h, powder particles are controlled at D50=1.0 μm ± 0.2 μm, and slurry is made；Ball milling step specifically includes in step S5: according to
Material: ball: the zirconia ball and deionized water of diameter 1mm~5mm are added into ball mill tank by water quality ratio 1:4:1.5, set ball
Mill speed is 200~250rpm, and after Ball-milling Time is 1h~4h, powder particles are controlled at D50=1.0 μm ± 0.2 μm, is made
Slurry.
Preferably, baking step specifically includes in step S3: the resulting slurry of step S2 is put and is dried in an oven, baking oven
Temperature setting is 100 DEG C~200 DEG C, and the time is 10h~for 24 hours；Baking step specifically includes in step S6: step S5 is resulting
Slurry is put dries in an oven, and oven temperature is set as 100 DEG C~200 DEG C, and the time is 10h~for 24 hours.
Preferably, the burn in step in step S4 specifically includes: the resulting powder of step S3 is placed in high temperature sintering furnace
Pre-burning is carried out, temperature setting is 800 DEG C~850 DEG C, and heating rate is 1~4 DEG C/min, keeps the temperature natural cooling after 2h~4h.
One embodiment of the present of invention discloses a kind of wireless charging RX end iron ferrite, using above-mentioned manufacturer
Method is made.
One embodiment of the present of invention discloses a kind of manufacturing method of the end wireless charging RX magnetic sheet, including following step
It is rapid:
Include the steps that S1~S6 in the manufacturing method of above-mentioned wireless charging RX end iron ferrite, and
S7: the resulting wireless charging of step S6 is cast using dry method with RX end iron ferrite magnetic sheet is made；
S8: the resulting magnetic sheet of step S7 is sintered, and obtains the end wireless charging RX magnetic sheet.
Preferably, sintering step specifically includes in step S8:
Temperature rise period: making temperature rise to 400~500 DEG C from room temperature with 0.1 DEG C/min~1.0 DEG C of heating rate/min, and
It keeps the temperature 2h~5h and, with 1.0 DEG C/min~2.0 DEG C of heating rate/min, is continuously heating to 800 DEG C~900 after to be bonded dose of discharge
DEG C, and keep the temperature 1h~3h；
Blank gradually tapers up the stage: being continuously heating to 920 DEG C~1000 with 0.5 DEG C/min~1.5 DEG C of heating rate/min
℃；
Holding stage: 1h~4h is kept the temperature at 920 DEG C~1000 DEG C；
Temperature-fall period: after burned, cooling down, and cooling rate is 0.5 DEG C/min~2.0 DEG C/min.
One embodiment of the present of invention discloses a kind of end wireless charging RX magnetic sheet, using above-mentioned manufacturer's legal system
?.
Compared with prior art, the beneficial effects of the present invention are the wireless charging disclosed by the invention end RX (receiving ends
Mouthful) Ferrite Material and magnetic sheet and its manufacturing method, which possesses very big resistivity, and when sintering can be in sky
It is carried out in gas, and sintering temperature is relatively low, technique is relatively simple.Therefore, magnetic permeability μ i with higher, lower can be prepared
Power loss PcvWith higher saturation flux density BsNickel-zinc ferrite, apply it in wireless charging device, play
Improve the effect of charging performance.Specifically, which has the advantage that (1) has high magnetic permeability μ i, in 10KHz
~200KHz frequency separation, initial permeability μ i are 1800~2500；(2) there is high saturation magnetic flux density Bs, saturation flux
Density BsIt can achieve 360mT, and the saturation flux density B of similar ferrite powdersWithin 280mT；(3) there is low-power consumption
Pcv, power consumption of the powder at 50KHz/150mT/25 DEG C is in 200KW/m3Within, and the power consumption of similar ferrite powder
200KW/m3More than；(4) sintering is high-efficient, and magnetic sheet magnetic conductivity is stablized ± 10%, it can be achieved that the folded burning of multi-disc, improves and be sintered effect
Rate reduces cost；(5) high conversion efficiency is in the transfer efficiency of efficiency conversion aspect, the done magnetic sheet of the ferrite powder
85.4%~86.5%, and the transfer efficiency of the done magnetic sheet of similar ferrite powder is 85.0% or so；(6) coercivity Hc<
25A/m。
Further, in terms of raw material selection, all raw material is all made of high-purity material, avoids drawing for impurity as far as possible
Enter, ensure that the quality of raw material；In terms of formula, using dedicated sintering aid (MoO3), dense micro-structure, crystal grain are tiny
One.Also formula is monitored simultaneously, every batch of material all carries out composition test, deviation such as occurs, compensates.In terms of grinding material,
Ball milling is carried out using zirconia ball and polyurethane liner, it is not easy to metal Fe impurity be caused to be mixed into and cause material composition mistake
Iron, it is easier to use more Fe in the formulation design2O3, to obtain higher magnetic conductivity.In terms of technique production, every batch of
Material all carries out testing graininess, makes granularity control within the limits prescribed；Under this granularity, powder active is good, can effectively be burnt
Knot.
Detailed description of the invention
Fig. 1 is the manufacturing method flow chart of the wireless charging RX end iron ferrite of the preferred embodiment of the present invention；
Fig. 2 is the manufacturing method flow chart of the wireless charging end the RX magnetic sheet of the preferred embodiment of the present invention；
Fig. 3 is the microstructure of magnetic sheet obtained by each example of the present invention；
Fig. 4 is the microstructure of traditional material magnetic sheet.
Specific embodiment
Below against attached drawing and in conjunction with preferred embodiment, the invention will be further described.
One embodiment of the present of invention discloses a kind of formula of wireless charging RX end iron ferrite, including principal component
And adding ingredient, principal component include Fe2O3, NiO, ZnO, CuO, wherein the weight summation of each ingredient be 100wt%:
Adding ingredient includes SiO2、Co2O3、MoO3、CaCO3, wherein each ingredient accounts for the percentage score of the total weight of principal component
Not are as follows:
Wherein, each ingredient of above-mentioned principal component and adding ingredient is high pure raw material, and purity is respectively as follows: Fe2O3≥
99.5wt%, NiO >=99.5wt%, ZnO >=99wt%, CuO >=99wt%, SiO2>=99wt%, Co2O3>=99wt%, MoO3
>=99.5wt%, CaCO3>=99wt%.
As shown in Figure 1, the preferred embodiment of the present invention provides a kind of manufacturer of wireless charging RX end iron ferrite
Method, comprising the following steps:
S1: raw material Fe is weighed according to formula2O3、NiO、ZnO、CuO、SiO2、Co2O3、MoO3、CaCO3, with spare；
S2: being put into sand mill for the load weighted principal component raw material of step S1, according to material: ball: water quality ratio 1:4:1.5, to
The zirconia ball and deionized water of diameter 1mm~5mm are added in sand mill tank, sets sand mill revolving speed as 200~250rpm, ball
After grinding 4h~10h, powder particles are controlled at D50=1.0 μm ± 0.2 μm, and slurry is made；
S3: slurry obtained by step S2 being put and is dried in an oven, and oven temperature is set as 100 DEG C~200 DEG C, and the time is
10h~for 24 hours；
S4: being placed in high temperature sintering furnace for powder obtained by step S3 and carry out pre-burning, and temperature setting is 800 DEG C~850 DEG C, is risen
Warm rate is 1 DEG C~4 DEG C/min, keeps the temperature natural cooling after 2h~4h；
S5: preburning powdered material obtained by step S4 is placed in ball mill tank, additive is added according to formula, according to step
Rapid S2 is operated, and Ball-milling Time is 1h~4h, and powder particles are controlled at D50=1.0 μm ± 0.2 μm, and slurry is made；
S6: the resulting slurry of step S5 ball milling is operated according to step S3, dries powder, obtained wireless charging RX
End iron ferrite.
Wherein, carrying out Performance Evaluation with RX end iron ferrite to wireless charging obtained by step S6 includes following step
It is rapid:
It is with the solid content that 1wt%~2wt% is added in RX end iron ferrite by the resulting wireless charging of step S6
10% binder is uniformly mixed and is granulated, the powder pressing being granulated at ring-like, thickness 3mm~4mm, internal diameter 8.5mm
~9mm, outer diameter 13mm~15mm, briquetting pressure are 3T~5T, and the dwell time is 2s~5s；Wherein, binder can be using poly-
Vinyl alcohol PVA1788.
The ring-like Ferrite Material suppressed is placed in high temperature sintering furnace and is sintered, sintering temperature be 920 DEG C~
1000 DEG C, and carried out in natural air；Further, sintering step includes:
Temperature rise period: slowly heating up, and is slowly raised to temperature from room temperature with 0.1 DEG C/min~1.0 DEG C of heating rate/min
It 400~500 DEG C, keeps the temperature 2h~5h and, with 1.0 DEG C/min~2.0 DEG C of heating rate/min, continues to heat up after to be bonded dose of discharge
To 800 DEG C~900 DEG C, 1h~3h is kept the temperature；
Blank gradually tapers up the stage: being continuously heating to 920 DEG C~1000 with 0.5 DEG C/min~1.5 DEG C of heating rate/min
℃；
Holding stage: 1h~4h is kept the temperature at 920 DEG C~1000 DEG C；
Temperature-fall period: after burned, cooling down, and cooling rate is 0.5 DEG C/min~2.0 DEG C/min.
As shown in Fig. 2, another preferred embodiment of the present invention provides a kind of manufacturing method of the end wireless charging RX magnetic sheet,
The following steps are included:
Above-mentioned steps S1~S6, and
S7: magnetic sheet, magnetic are made to the end the RX ferrite material dry method casting technology of wireless charging obtained by step S6
Piece can round, rectangular, rectangle, ellipse, track type etc.；
S8: the step S7 magnetic sheet made being placed in high temperature sintering furnace and is sintered, and sintering temperature is 920 DEG C~1000
DEG C, and carried out in natural air；Further, sintering step includes:
Temperature rise period: slowly heating up, and is slowly raised to temperature from room temperature with 0.1 DEG C/min~1.0 DEG C of heating rate/min
It 400~500 DEG C, keeps the temperature 2h~5h and, with 1.0 DEG C/min~2.0 DEG C of heating rate/min, continues to heat up after to be bonded dose of discharge
To 800 DEG C~900 DEG C, 1h~3h is kept the temperature；
Blank gradually tapers up the stage: being continuously heating to 920 DEG C~1000 with 0.5 DEG C/min~1.5 DEG C of heating rate/min
℃；
Holding stage: 1h~4h is kept the temperature at 920 DEG C~1000 DEG C；
Temperature-fall period: after burned, cooling down, and cooling rate is 0.5 DEG C/min~2.0 DEG C/min.
Wherein, in above-mentioned manufacturing method, sintering directly determines point of the final composition of Ferrite Material and magnetic sheet, phase
Cloth, grain size, compactness, size, appearance and performance.Sintering should be according to agglomerating plant used, calcined temperature height, Preburning material
Shrinkage, the type of binder and additional proportion, properties of product requirement, form and dimension, dress base weight and mode etc.
Difference, determine suitable sintering temperature and sintering curre, inventor is on a large amount of experiment basis, the above preferred side that obtains
The temperature rise period is mainly the volatilization process of moisture in blank, binder in case, is needed slowly to heat up at this time to avoid blank cracking, this
After be that blank gradually tapers up the stage, since this section of firing affects size, the uniformity, the porosity and the distribution of magnetic core crystal grain
Deng heating rate at this time is appropriate；To after maximum sintering temperature, heat preservation 1h~4h is advisable；In temperature-fall period, cooling rate pair
The electromagnetic performance and qualification rate of product also have a significant impact.By the above preferred sintering process, there's almost no for product is viscous
Connection, deformation and cracking, and the overall dimensions of product and the consistency of performance are met the requirements.
The present invention is further elaborated below by way of more specific example.
Example 1
A kind of wireless charging end RX nickel-zinc-ferrite material, formula are divided into principal component and adding ingredient；Principal component is pressed
According to oxide weight meter:
Additive is SiO2、Co2O3、MoO3、CaCO3, ingredient is according to accounting for principal component total weight percent meter:
Raw material principal component and additive component are high pure raw material, purity Fe2O3>=99.5wt%, NiO >=
99.5wt%, ZnO >=99wt%, CuO >=99wt%, SiO2>=99wt%, Co2O3>=99wt%, MoO3>=99.5wt%,
CaCO3>=99wt%.
A kind of manufacturing method of the wireless charging end RX nickel-zinc-ferrite material, comprising the following steps:
Step 1 weighs raw material Fe according to formula2O3、NiO、ZnO、CuO、SiO2、Co2O3、MoO3、CaCO3, with spare；
The load weighted principal component raw material of step 1 is put into sand mill by step 2, according to material: ball: water quality ratio 1:4:1.5,
The zirconia ball and deionized water of diameter 1mm are added into sand mill tank, sets sand mill revolving speed as 200rpm, after ball milling 10h,
Powder particles are controlled at D50=1.0 μm, and slurry is made；
Step 2 gained slurry is put and is dried in an oven by step 3, and oven temperature is set as 150 DEG C, time 15h；
Step 3 gained powder is placed in high temperature sintering furnace progress pre-burning by step 4, and temperature setting is 830 DEG C, heating speed
Rate is 1.5 DEG C/min, keeps the temperature natural cooling after 3h；
Preburning powdered material obtained by step 4 is placed in ball mill tank by step 5, and additive is added according to formula, according to
Step 2 is operated, Ball-milling Time 2h, and powder particles are controlled at D50=1.0 μm, and slurry is made；
Step 6 operates the resulting slurry of step 5 ball milling according to step 3, and drying powder is spare；
Step 7 carries out Performance Evaluation to powder obtained by step 6.1.5wt% will be added in the resulting powder of step 6
Solid content be 10% binder, be uniformly mixed and be granulated, the powder pressing being granulated at ring-like, thickness 3.5mm is interior
Diameter 9.0mm, outer diameter 14.7mm, briquetting pressure 3.5T, dwell time 3s；
Step 8, the ring-like Ferrite Material for suppressing step 7 are placed in high temperature sintering furnace and are sintered, sintering temperature
It is 960 DEG C, the sintering includes:
Temperature rise period: slowly heating up, and so that temperature is slowly raised to 450 DEG C from room temperature with 0.2 DEG C/min of heating rate, heat preservation
3h after to be bonded dose of discharge, with 1.5 DEG C/min of heating rate, is continuously heating to 830 DEG C, keeps the temperature 2h；
Blank gradually tapers up the stage: being continuously heating to 960 DEG C with 1.0 DEG C/min of heating rate；
Holding stage: 2h is kept the temperature at described 960 DEG C；
Temperature-fall period: after burned, cooling down, and cooling rate is 1.5 DEG C/min.
Obtained wireless charging produces wireless charging RX with the end RX nickel-zinc-ferrite material with the technology that dry method is cast
Hold magnetic sheet, comprising the following steps:
Step 1 weighs raw material Fe according to formula2O3、NiO、ZnO、CuO、SiO2、Co2O3、MoO3、CaCO3, with spare；
The load weighted principal component raw material of step 1 is put into sand mill by step 2, according to material: ball: water quality ratio 1:4:1.5,
The zirconia ball and deionized water of diameter 1mm are added into sand mill tank, sets sand mill revolving speed as 200rpm, after ball milling 10h,
Powder particles are controlled at D50=1.0 μm, and slurry is made；
Step 2 gained slurry is put and is dried in an oven by step 3, and oven temperature is set as 150 DEG C, time 15h；
Step 3 gained powder is placed in high temperature sintering furnace progress pre-burning by step 4, and temperature setting is 830 DEG C, heating speed
Rate is 1.5 DEG C/min, keeps the temperature natural cooling after 3h；
Preburning powdered material obtained by step 4 is placed in ball mill tank by step 5, and additive is added according to formula, according to
Step 2 is operated, Ball-milling Time 1.5h, and powder particles are controlled at D50=1.0 μm, and slurry is made；
Step 6 operates the resulting slurry of step 5 ball milling according to step 3, and drying powder is spare；
Step 7 makes magnetic sheet to the dry method casting technology of powder obtained by step 6, and magnetic sheet can round, rectangular, square
Shape, ellipse, track type etc.；
Step 8, the magnetic sheet for making step 7 are placed in high temperature sintering furnace and are sintered, and sintering temperature is 960 DEG C, institute
Stating sintering includes:
Temperature rise period: slowly heating up, and so that temperature is slowly raised to 450 DEG C from room temperature with 0.2 DEG C/min of heating rate, heat preservation
3h after to be bonded dose of discharge, with 1.5 DEG C/min of heating rate, is continuously heating to 830 DEG C, keeps the temperature 2h；
Blank gradually tapers up the stage: being continuously heating to 960 DEG C with 1.0 DEG C/min of heating rate；
Holding stage: 2h is kept the temperature at described 960 DEG C；
Temperature-fall period: after burned, cooling down, and cooling rate is 1.5 DEG C/min.
Test:
The FERRITE CORE and magnetic sheet of the preparation of this example are tested, E4991A+16454A RF impedance analyzer
Test ring inductance amount LsAnd Q, calculate Effective permeability μ i；Magnet ring B is tested using IWATSU SY-8218 type hysteresiscopes、
HcAnd Pcv；Magnetic sheet Cross Section Morphology is observed using VEGA 3EPH scanning electron microscope；Test transformation efficiency η, the effective magnetic of magnetic sheet
Conductance μ ' and Effective permeability imaginary part μ " (wherein μ "=μ '/Q refers to loss), test result is shown in Table 1.
Example 2
A kind of wireless charging end RX nickel-zinc-ferrite material, formula are divided into principal component and adding ingredient；Principal component is pressed
According to oxide weight meter:
Additive is SiO2、Co2O3、MoO3、CaCO3, ingredient is according to accounting for principal component total weight percent meter:
Raw material principal component and additive component are high pure raw material, purity Fe2O3>=99.5wt%, NiO >=
99.5wt%, ZnO >=99wt%, CuO >=99wt%, SiO2>=99wt%, Co2O3>=99wt%, MoO3>=99.5wt%,
CaCO3>=99wt%.
A kind of the wireless charging end RX nickel-zinc-ferrite material and manufacturing method, comprising the following steps:
Step 1 weighs raw material Fe according to formula2O3、NiO、ZnO、CuO、SiO2、Co2O3、MoO3、CaCO3, with spare；
The load weighted principal component raw material of step 1 is put into sand mill by step 2, according to material: ball: water quality ratio 1:4:1.5,
The zirconia ball and deionized water of diameter 1mm are added into sand mill tank, sets sand mill revolving speed as 200rpm, after ball milling 10h,
Powder particles are controlled at D50=1.0 μm, and slurry is made；
Step 2 gained slurry is put and is dried in an oven by step 3, and oven temperature is set as 150 DEG C, time 15h；
Step 3 gained powder is placed in high temperature sintering furnace progress pre-burning by step 4, and temperature setting is 840 DEG C, heating speed
Rate is 1.5 DEG C/min, keeps the temperature natural cooling after 3h；
Preburning powdered material obtained by step 4 is placed in ball mill tank by step 5, and additive is added according to formula, according to
Step 2 is operated, Ball-milling Time 2h, and powder particles are controlled at D50=1.0 μm, and slurry is made；
Step 6 operates the resulting slurry of step 5 ball milling according to step 3, and drying powder is spare；
Step 7 carries out Performance Evaluation to powder obtained by step 6.1.5wt% will be added in the resulting powder of step 6
Solid content be 10% binder, be uniformly mixed and be granulated, the powder pressing being granulated at ring-like, thickness 3.5mm is interior
Diameter 9.0mm, outer diameter 14.7mm, briquetting pressure 3.5T, dwell time 3s；
Step 8, the ring-like Ferrite Material for suppressing step 7 are placed in high temperature sintering furnace and are sintered, sintering temperature
It is 960 DEG C, the sintering includes:
Temperature rise period: slowly heating up, and so that temperature is slowly raised to 450 DEG C from room temperature with 0.2 DEG C/min of heating rate, heat preservation
4h after to be bonded dose of discharge, with 1.5 DEG C/min of heating rate, is continuously heating to 840 DEG C, keeps the temperature 2h；
Blank gradually tapers up the stage: being continuously heating to 960 DEG C with 1.0 DEG C/min of heating rate；
Holding stage: 2h is kept the temperature at described 960 DEG C；
Temperature-fall period: after burned, cooling down, and cooling rate is 1.5 DEG C/min.
Obtained wireless charging produces wireless charging RX with the end RX nickel-zinc-ferrite material with the technology that dry method is cast
Hold magnetic sheet, comprising the following steps:
Step 1 weighs raw material Fe according to formula2O3、NiO、ZnO、CuO、SiO2、Co2O3、MoO3、CaCO3, with spare；
The load weighted principal component raw material of step 1 is put into sand mill by step 2, according to material: ball: water quality ratio 1:4:1.5,
The zirconia ball and deionized water of diameter 1mm are added into sand mill tank, sets sand mill revolving speed as 200rpm, after ball milling 10h,
Powder particles are controlled at D50=1.0 μm, and slurry is made；
Step 2 gained slurry is put and is dried in an oven by step 3, and oven temperature is set as 150 DEG C, time 15h；
Step 3 gained powder is placed in high temperature sintering furnace progress pre-burning by step 4, and temperature setting is 840 DEG C, heating speed
Rate is 1.5 DEG C/min, keeps the temperature natural cooling after 3h；
Preburning powdered material obtained by step 4 is placed in ball mill tank by step 5, and additive is added according to formula, according to
Step 2 is operated, Ball-milling Time 2h, and powder particles are controlled at D50=1.0 μm, and slurry is made；
Step 6 operates the resulting slurry of step 5 ball milling according to step 3, and drying powder is spare；
Step 7 makes magnetic sheet to the dry method casting technology of powder obtained by step 6, and magnetic sheet can round, rectangular, square
Shape, ellipse, track type etc.；
Step 8, the magnetic sheet for making step 7 are placed in high temperature sintering furnace and are sintered, and sintering temperature is 960 DEG C, institute
Stating sintering includes:
Temperature rise period: slowly heating up, and so that temperature is slowly raised to 450 DEG C from room temperature with 0.5 DEG C/min of heating rate, heat preservation
4h after to be bonded dose of discharge, with 1.5 DEG C/min of heating rate, is continuously heating to 840 DEG C, keeps the temperature 2h；
Blank gradually tapers up the stage: being continuously heating to 960 DEG C with 1.5 DEG C/min of heating rate；
Holding stage: 2h is kept the temperature at described 960 DEG C；
Temperature-fall period: after burned, cooling down, and cooling rate is 1.5 DEG C/min.
Test:
The FERRITE CORE and magnetic sheet of the preparation of this example are tested, E4991A+16454A RF impedance analyzer
Test ring inductance amount LsAnd Q, calculate Effective permeability μ i；Magnet ring B is tested using IWATSU SY-8218 type hysteresiscopes、
HcAnd Pcv；Magnetic sheet Cross Section Morphology is observed using VEGA 3EPH scanning electron microscope；Test transformation efficiency η, the effective magnetic of magnetic sheet
Conductance μ ' and Effective permeability imaginary part μ " (wherein μ "=μ '/Q refers to loss), test result is shown in Table 1.
Example 3
A kind of wireless charging end RX nickel-zinc-ferrite material, formula are divided into principal component and adding ingredient；Principal component is pressed
According to oxide weight meter:
Additive is SiO2、Co2O3、MoO3、CaCO3, ingredient is according to accounting for principal component total weight percent meter:
Raw material principal component and additive component are high pure raw material, purity Fe2O3>=99.5wt%, NiO >=
99.5wt%, ZnO >=99wt%, CuO >=99wt%, SiO2>=99wt%, Co2O3>=99wt%, MoO3>=99.5wt%,
CaCO3>=99wt%.
A kind of the wireless charging end RX nickel-zinc-ferrite material and manufacturing method, comprising the following steps:
Step 1 weighs raw material Fe according to formula2O3、NiO、ZnO、CuO、SiO2、Co2O3、MoO3、CaCO3, with spare；
The load weighted principal component raw material of step 1 is put into sand mill by step 2, according to material: ball: water quality ratio 1:4:1.5,
The zirconia ball and deionized water of diameter 1mm are added into sand mill tank, sets sand mill revolving speed as 200rpm, after ball milling 10h,
Powder particles are controlled at D50=1.0 μm, and slurry is made；
Step 2 gained slurry is put and is dried in an oven by step 3, and oven temperature is set as 150 DEG C, time 15h；
Step 3 gained powder is placed in high temperature sintering furnace progress pre-burning by step 4, and temperature setting is 850 DEG C, heating speed
Rate is 1.5 DEG C/min, keeps the temperature natural cooling after 3h；
Preburning powdered material obtained by step 4 is placed in ball mill tank by step 5, and additive is added according to formula, according to
Step 2 is operated, Ball-milling Time 2.5h, and powder particles are controlled at D50=1.0 μm, and slurry is made；
Step 6 operates the resulting slurry of step 5 ball milling according to step 3, and drying powder is spare；
Step 7 carries out Performance Evaluation to powder obtained by step 6.1.5wt% will be added in the resulting powder of step 6
Solid content be 10% binder, be uniformly mixed and be granulated, the powder pressing being granulated at ring-like, thickness 3.5mm is interior
Diameter 9.0mm, outer diameter 14.7mm, briquetting pressure 3.5T, dwell time 3s；
Step 8, the ring-like Ferrite Material for suppressing step 7 are placed in high temperature sintering furnace and are sintered, sintering temperature
It is 960 DEG C, the sintering includes:
Temperature rise period: slowly heating up, and so that temperature is slowly raised to 450 DEG C from room temperature with 0.3 DEG C/min of heating rate, heat preservation
5h after to be bonded dose of discharge, with 1.5 DEG C/min of heating rate, is continuously heating to 850 DEG C, keeps the temperature 2h；
Blank gradually tapers up the stage: being continuously heating to 960 DEG C with 1.0 DEG C/min of heating rate；
Holding stage: 2h is kept the temperature at described 960 DEG C；
Temperature-fall period: after burned, cooling down, and cooling rate is 1.5 DEG C/min.
Obtained wireless charging produces wireless charging RX with the end RX nickel-zinc-ferrite material with the technology that dry method is cast
Hold magnetic sheet, comprising the following steps:
Step 1 weighs raw material Fe according to formula2O3、NiO、ZnO、CuO、SiO2、Co2O3、MoO3、CaCO3, with spare；
The load weighted principal component raw material of step 1 is put into sand mill by step 2, according to material: ball: water quality ratio 1:4:1.5,
The zirconia ball and deionized water of diameter 1mm are added into sand mill tank, sets sand mill revolving speed as 200rpm, after ball milling 10h,
Powder particles are controlled at D50=1.0 μm, and slurry is made；
Step 2 gained slurry is put and is dried in an oven by step 3, and oven temperature is set as 150 DEG C, time 15h；
Step 3 gained powder is placed in high temperature sintering furnace progress pre-burning by step 4, and temperature setting is 850 DEG C, heating speed
Rate is 1.5 DEG C/min, keeps the temperature natural cooling after 3h；
Preburning powdered material obtained by step 4 is placed in ball mill tank by step 5, and additive is added according to formula, according to
Step 2 is operated, Ball-milling Time 2.5h, and powder particles are controlled at D50=1.0 μm, and slurry is made；
Step 6 operates the resulting slurry of step 5 ball milling according to step 3, and drying powder is spare；
Step 7 makes magnetic sheet to the dry method casting technology of powder obtained by step 6, and magnetic sheet can round, rectangular, square
Shape, ellipse, track type etc.；
Step 8, the magnetic sheet for making step 7 are placed in high temperature sintering furnace and are sintered, and sintering temperature is 960 DEG C, institute
Stating sintering includes:
Temperature rise period: slowly heating up, and so that temperature is slowly raised to 450 DEG C from room temperature with 0.3 DEG C/min of heating rate, heat preservation
5h after to be bonded dose of discharge, with 1.5 DEG C/min of heating rate, is continuously heating to 850 DEG C, keeps the temperature 2h；
Blank gradually tapers up the stage: being continuously heating to 960 DEG C with 1.0 DEG C/min of heating rate；
Holding stage: 2h is kept the temperature at described 960 DEG C；
Temperature-fall period: after burned, cooling down, and cooling rate is 1.5 DEG C/min.
Test:
The FERRITE CORE and magnetic sheet of the preparation of this example are tested, E4991A+16454A RF impedance analyzer
Ring inductance amount Ls and Q is tested, Effective permeability μ i is calculated；Magnet ring is tested using IWATSU SY-8218 type hysteresiscope
Bs, Hc and Pcv；Magnetic sheet Cross Section Morphology is observed using VEGA 3EPH scanning electron microscope；It tests the transformation efficiency η of magnetic sheet, have
Effect magnetic permeability μ ' and Effective permeability imaginary part μ " (wherein μ "=μ '/Q refers to loss), test result is shown in Table 1.
Example 4
A kind of wireless charging end RX nickel-zinc-ferrite material, formula are divided into principal component and adding ingredient；Principal component is pressed
According to oxide weight meter:
Additive is SiO2、Co2O3、MoO3、CaCO3, ingredient is according to accounting for principal component total weight percent meter:
Raw material principal component and additive component are high pure raw material, purity Fe2O3>=99.5wt%, NiO >=
99.5wt%, ZnO >=99wt%, CuO >=99wt%, SiO2>=99wt%, Co2O3>=99wt%, MoO3>=99.5wt%,
CaCO3>=99wt%.
A kind of the wireless charging end RX nickel-zinc-ferrite material and manufacturing method, comprising the following steps:
Step 1 weighs raw material Fe according to formula2O3、NiO、ZnO、CuO、SiO2、Co2O3、MoO3、CaCO3, with spare；
The load weighted principal component raw material of step 1 is put into sand mill by step 2, according to material: ball: water quality ratio 1:4:1.5,
The zirconia ball and deionized water of diameter 1mm are added into sand mill tank, sets sand mill revolving speed as 200rpm, after ball milling 10h,
Powder particles are controlled at D50=1.0 μm, and slurry is made；
Step 2 gained slurry is put and is dried in an oven by step 3, and oven temperature is set as 150 DEG C, time 15h；
Step 3 gained powder is placed in high temperature sintering furnace progress pre-burning by step 4, and temperature setting is 850 DEG C, heating speed
Rate is 1.5 DEG C/min, keeps the temperature natural cooling after 3h；
Preburning powdered material obtained by step 4 is placed in ball mill tank by step 5, and additive is added according to formula, according to
Step 2 is operated, Ball-milling Time 2.5h, and powder particles are controlled at D50=1.0 μm, and slurry is made；
Step 6 operates the resulting slurry of step 5 ball milling according to step 3, and drying powder is spare；
Step 7 carries out Performance Evaluation to powder obtained by step 6.1.5wt% will be added in the resulting powder of step 6
Solid content be 10% binder, be uniformly mixed and be granulated, the powder pressing being granulated at ring-like, thickness 3.5mm is interior
Diameter 9.0mm, outer diameter 14.7mm, briquetting pressure 3.5T, dwell time 3s；
Step 8, the ring-like Ferrite Material for suppressing step 7 are placed in high temperature sintering furnace and are sintered, sintering temperature
It is 960 DEG C, the sintering includes:
Temperature rise period: slowly heating up, and so that temperature is slowly raised to 450 DEG C from room temperature with 0.3 DEG C/min of heating rate, heat preservation
5h after to be bonded dose of discharge, with 1.5 DEG C/min of heating rate, is continuously heating to 850 DEG C, keeps the temperature 2h；
Blank gradually tapers up the stage: being continuously heating to 960 DEG C with 1.0 DEG C/min of heating rate；
Holding stage: 2h is kept the temperature at described 960 DEG C；
Temperature-fall period: after burned, cooling down, and cooling rate is 1.5 DEG C/min.
Obtained wireless charging produces wireless charging RX with the end RX nickel-zinc-ferrite material with the technology that dry method is cast
Hold magnetic sheet, comprising the following steps:
Step 1 weighs raw material Fe according to formula2O3、NiO、ZnO、CuO、SiO2、Co2O3、MoO3、CaCO3, with spare；
The load weighted principal component raw material of step 1 is put into sand mill by step 2, according to material: ball: water quality ratio 1:4:1.5,
The zirconia ball and deionized water of diameter 1mm are added into sand mill tank, sets sand mill revolving speed as 200rpm, after ball milling 10h,
Powder particles are controlled at D50=1.0 μm, and slurry is made；
Step 2 gained slurry is put and is dried in an oven by step 3, and oven temperature is set as 150 DEG C, time 15h；
Step 3 gained powder is placed in high temperature sintering furnace progress pre-burning by step 4, and temperature setting is 850 DEG C, heating speed
Rate is 1.5 DEG C/min, keeps the temperature natural cooling after 3h；
Preburning powdered material obtained by step 4 is placed in ball mill tank by step 5, and additive is added according to formula, according to
Step 2 is operated, Ball-milling Time 2.5h, and powder particles are controlled at D50=1.0 μm, and slurry is made；
Step 6 operates the resulting slurry of step 5 ball milling according to step 3, and drying powder is spare；
Step 7 makes magnetic sheet to the dry method casting technology of powder obtained by step 6, and magnetic sheet can round, rectangular, square
Shape, ellipse, track type etc.；
Step 8, the magnetic sheet for making step 7 are placed in high temperature sintering furnace and are sintered, and sintering temperature is 960 DEG C, institute
Stating sintering includes:
Temperature rise period: slowly heating up, and so that temperature is slowly raised to 450 DEG C from room temperature with 0.3 DEG C/min of heating rate, heat preservation
5h after to be bonded dose of discharge, with 1.5 DEG C/min of heating rate, is continuously heating to 850 DEG C, keeps the temperature 2h；
Blank gradually tapers up the stage: being continuously heating to 960 DEG C with 1.0 DEG C/min of heating rate；
Holding stage: 2h is kept the temperature at described 960 DEG C；
Temperature-fall period: after burned, cooling down, and cooling rate is 1.5 DEG C/min.
Test:
The FERRITE CORE and magnetic sheet of the preparation of this example are tested, E4991A+16454A RF impedance analyzer
Test ring inductance amount LsAnd Q, calculate Effective permeability μ i；Magnet ring B is tested using IWATSU SY-8218 type hysteresiscopes、
HcAnd Pcv；Magnetic sheet Cross Section Morphology is observed using VEGA 3EPH scanning electron microscope；Test transformation efficiency η, the effective magnetic of magnetic sheet
Conductance μ ' and Effective permeability imaginary part μ " (wherein μ "=μ '/Q refers to loss), test result is shown in Table 1.
Example 5
A kind of wireless charging end RX nickel-zinc-ferrite material, formula are divided into principal component and adding ingredient；Principal component is pressed
According to oxide weight meter:
Additive is SiO2、Co2O3、MoO3、CaCO3, ingredient is according to accounting for principal component total weight percent meter:
Raw material principal component and additive component are high pure raw material, purity Fe2O3>=99.5wt%, NiO >=
99.5wt%, ZnO >=99wt%, CuO >=99wt%, SiO2>=99wt%, Co2O3>=99wt%, MoO3>=99.5wt%,
CaCO3>=99wt%.
A kind of the wireless charging end RX nickel-zinc-ferrite material and manufacturing method, comprising the following steps:
Step 1 weighs raw material Fe according to formula2O3、NiO、ZnO、CuO、SiO2、Co2O3、MoO3、CaCO3, with spare；
The load weighted principal component raw material of step 1 is put into sand mill by step 2, according to material: ball: water quality ratio 1:4:1.5,
The zirconia ball and deionized water of diameter 1mm are added into sand mill tank, sets sand mill revolving speed as 200rpm, after ball milling 10h,
Powder particles are controlled at D50=1.0 μm, and slurry is made；
Step 2 gained slurry is put and is dried in an oven by step 3, and oven temperature is set as 150 DEG C, time 15h；
Step 3 gained powder is placed in high temperature sintering furnace progress pre-burning by step 4, and temperature setting is 850 DEG C, heating speed
Rate is 1.5 DEG C/min, keeps the temperature natural cooling after 3h；
Preburning powdered material obtained by step 4 is placed in ball mill tank by step 5, and additive is added according to formula, according to
Step 2 is operated, Ball-milling Time 2.5h, and powder particles are controlled at D50=1.0 μm, and slurry is made；
Step 6 operates the resulting slurry of step 5 ball milling according to step 3, and drying powder is spare；
Step 7 carries out Performance Evaluation to powder obtained by step 6.1.5wt% will be added in the resulting powder of step 6
Solid content be 10% binder, be uniformly mixed and be granulated, the powder pressing being granulated at ring-like, thickness 3.5mm is interior
Diameter 9.0mm, outer diameter 14.7mm, briquetting pressure 3.5T, dwell time 3s；
Step 8, the ring-like Ferrite Material for suppressing step 7 are placed in high temperature sintering furnace and are sintered, sintering temperature
It is 960 DEG C, the sintering includes:
Temperature rise period: slowly heating up, and so that temperature is slowly raised to 450 DEG C from room temperature with 0.3 DEG C/min of heating rate, heat preservation
5h after to be bonded dose of discharge, with 1.5 DEG C/min of heating rate, is continuously heating to 850 DEG C, keeps the temperature 2h；
Blank gradually tapers up the stage: being continuously heating to 960 DEG C with 1.0 DEG C/min of heating rate；
Holding stage: 2h is kept the temperature at described 960 DEG C；
Temperature-fall period: after burned, cooling down, and cooling rate is 1.5 DEG C/min.
Obtained wireless charging produces wireless charging RX with the end RX nickel-zinc-ferrite material with the technology that dry method is cast
Hold magnetic sheet, comprising the following steps:
Step 1 weighs raw material Fe according to formula2O3、NiO、ZnO、CuO、SiO2、Co2O3、MoO3, with spare；
The load weighted principal component raw material of step 1 is put into sand mill by step 2, according to material: ball: water quality ratio 1:4:1.5,
The zirconia ball and deionized water of diameter 1mm are added into sand mill tank, sets sand mill revolving speed as 200rpm, after ball milling 10h,
Powder particles are controlled at D50=1.0 μm, and slurry is made；
Step 2 gained slurry is put and is dried in an oven by step 3, and oven temperature is set as 150 DEG C, time 15h；
Step 3 gained powder is placed in high temperature sintering furnace progress pre-burning by step 4, and temperature setting is 850 DEG C, heating speed
Rate is 1.5 DEG C/min, keeps the temperature natural cooling after 3h；
Preburning powdered material obtained by step 4 is placed in ball mill tank by step 5, and additive is added according to formula, according to
Step 2 is operated, Ball-milling Time 2.5h, and powder particles are controlled at D50=1.0 μm, and slurry is made；
Step 6 operates the resulting slurry of step 5 ball milling according to step 3, and drying powder is spare；
Step 7 makes magnetic sheet to the dry method casting technology of powder obtained by step 6, and magnetic sheet can round, rectangular, square
Shape, ellipse, track type etc.；
Step 8, the magnetic sheet for making step 7 are placed in high temperature sintering furnace and are sintered, and sintering temperature is 960 DEG C, institute
Stating sintering includes:
Temperature rise period: slowly heating up, and so that temperature is slowly raised to 450 DEG C from room temperature with 0.3 DEG C/min of heating rate, heat preservation
5h after to be bonded dose of discharge, with 1.5 DEG C/min of heating rate, is continuously heating to 850 DEG C, keeps the temperature 2h；
Blank gradually tapers up the stage: being continuously heating to 960 DEG C with 1.0 DEG C/min of heating rate；
Holding stage: 2h is kept the temperature at described 960 DEG C；
Temperature-fall period: after burned, cooling down, and cooling rate is 1.5 DEG C/min.
Test:
The FERRITE CORE and magnetic sheet of the preparation of this example are tested, E4991A+16454A RF impedance analyzer
Test ring inductance amount LsAnd Q, calculate Effective permeability μ i；Magnet ring B is tested using IWATSU SY-8218 type hysteresiscopes、
HcAnd Pcv；Magnetic sheet Cross Section Morphology is observed using VEGA 3EPH scanning electron microscope；Test transformation efficiency η, the effective magnetic of magnetic sheet
Conductance μ ' and Effective permeability imaginary part μ " (wherein μ "=μ '/Q refers to loss), test result is shown in Table 1.
To the above-mentioned five examples wireless charging produced end RX nickel-zinc-ferrite material and wireless charging magnetic sheet
It is tested for the property, is compared with the correlated performance of traditional material, as shown in table 1, Fig. 3 and Fig. 4.
1 test result contrast table of table
From table 1, wireless charging made from each example of the present invention is compared with RX end iron ferrite with the performance of magnetic sheet
In traditional material, have many advantages, such as that high magnetic permeability, high Bs, low-power consumption, sintering are high-efficient；The wherein Ferrite Material in each example
Saturation flux density Bs can achieve 370mT, and the saturation flux density Bs of traditional ferrite powder is within 270mT；Respectively
The power consumption of Ferrite Material in example is within 200mW/cm3, and the power consumption 500mW/cm of traditional ferrite powder3More than；
30 DEG C high compared with traditional material of the Curie temperature Tc of Ferrite Material in each example or more, magnetic conductivity rate of descent is lower, can be more
Steady operation at a temperature of high.Magnetic sheet in each example in 960 DEG C of low-temperature sinterings, stablize ± 10% by magnetic sheet magnetic conductivity, and
Can be achieved that multi-disc is folded to burn, the magnetic sheet of traditional material production can only monolithic sintering, otherwise bonding die deforms.To sum up, each reality of the present invention
Wireless charging made from example is superior to traditional material with the performance of RX end iron ferrite and magnetic sheet.
It is wherein the microstructure of the magnetic sheet in each example of the present invention shown in Fig. 3, Fig. 4 show the magnetic sheet of traditional material
Microstructure；Compare from Fig. 3 and Fig. 4 as can be seen that gap is seldom after magnetic sheet obtained in each example of the present invention is sintered, occurs
Densification, crystal grain are tiny uniform；And traditional material gap is more, crystal grain is relatively larger, and flaking is presented；Therefore, this hair
Obtained material is more advantageous to magnetic sheet sliver in bright each example, influences on electromagnetic performance smaller.
The above content is a further detailed description of the present invention in conjunction with specific preferred embodiments, and it cannot be said that
Specific implementation of the invention is only limited to these instructions.For those skilled in the art to which the present invention belongs, it is not taking off
Under the premise of from present inventive concept, several equivalent substitute or obvious modifications can also be made, and performance or use is identical, all answered
When being considered as belonging to protection scope of the present invention.
Claims (10)
1. a kind of wireless charging RX end iron ferrite, which is characterized in that it is formulated including principal component and adding ingredient, described
Principal component includes Fe2O3, NiO, ZnO, CuO, wherein the weight summation of each ingredient be 100wt%:
The adding ingredient includes SiO2、Co2O3、MoO3、CaCO3, wherein each ingredient accounts for the percentage of the total weight of the principal component
Than being respectively as follows:
2. wireless charging according to claim 1 RX end iron ferrite, which is characterized in that the principal component and described
Each ingredient of adding ingredient is high pure raw material, and purity is respectively as follows: Fe2O3>=99.5wt%, NiO >=99.5wt%, ZnO >=
99wt%, CuO >=99wt%, SiO2>=99wt%, Co2O3>=99wt%, MoO3>=99.5wt%, CaCO3>=99wt%.
3. a kind of wireless charging manufacturing method of RX end iron ferrite, which comprises the following steps:
S1: the formula of wireless charging according to claim 1 or 2 RX end iron ferrite weighs raw material Fe2O3、NiO、
ZnO、CuO、SiO2、Co2O3、MoO3、CaCO3；
S2: the raw material of the principal component load weighted in step S1 is put into sand mill, carries out ball milling, slurry is made；
S3: the resulting slurry of step S2 is dried, powder is made；
S4: the resulting powder of step S3 is subjected to pre-burning, preburning powdered material is made；
S5: being put into ball mill for the resulting preburning powdered material of step S4, then by the original of the adding ingredient load weighted in step S1
Material is also placed in ball mill, carries out ball milling, and slurry is made；
S6: the resulting slurry of step S5 is dried, wireless charging RX end iron ferrite is made.
4. manufacturing method according to claim 3, which is characterized in that
Ball milling step in step S2 specifically includes: according to material: ball: diameter is added into sand mill tank in water quality ratio 1:4:1.5
The zirconia ball and deionized water of 1mm~5mm, sets sand mill revolving speed as 200~250rpm, after ball milling 4h~10h, powder grain
Slurry is made at D50=1.0 μm ± 0.2 μm in degree control；
Ball milling step specifically includes in step S5: according to material: ball: diameter is added into ball mill tank in water quality ratio 1:4:1.5
The zirconia ball and deionized water of 1mm~5mm, sets drum's speed of rotation as 200~250rpm, after Ball-milling Time is 1h~4h,
Powder particles are controlled at D50=1.0 μm ± 0.2 μm, and slurry is made.
5. manufacturing method according to claim 3, which is characterized in that
Baking step specifically includes in step S3: the resulting slurry of step S2 being put and is dried in an oven, oven temperature is set as
100 DEG C~200 DEG C, the time is 10h~for 24 hours；
Baking step specifically includes in step S6: the resulting slurry of step S5 being put and is dried in an oven, oven temperature is set as
100 DEG C~200 DEG C, the time is 10h~for 24 hours.
6. manufacturing method according to claim 3, which is characterized in that
Burn in step in step S4 specifically includes: the resulting powder of step S3 being placed in high temperature sintering furnace and carries out pre-burning, temperature
Degree is set as 800 DEG C~850 DEG C, and heating rate is 1~4 DEG C/min, keeps the temperature natural cooling after 2h~4h.
7. a kind of wireless charging RX end iron ferrite, which is characterized in that use the described in any item systems of claim 3 to 6
Method is made to be made.
8. a kind of wireless charging manufacturing method of the end RX magnetic sheet, which comprises the following steps:
Include the steps that S1 in the manufacturing method of the described in any item wireless charging RX end iron ferrites of claim 3 to 6
~S6, and
S7: the resulting wireless charging of step S6 is cast using dry method with RX end iron ferrite magnetic sheet is made；
S8: the resulting magnetic sheet of step S7 is sintered, and obtains the end wireless charging RX magnetic sheet.
9. manufacturing method according to claim 8, which is characterized in that sintering step specifically includes in step S8:
Temperature rise period: so that temperature is risen to 400~500 DEG C from room temperature with 0.1 DEG C/min~1.0 DEG C of heating rate/min, and keep the temperature
2h~5h, with 1.0 DEG C/min~2.0 DEG C of heating rate/min, is continuously heating to 800 DEG C~900 DEG C after to be bonded dose of discharge,
And keep the temperature 1h~3h；
Blank gradually tapers up the stage: being continuously heating to 920 DEG C~1000 DEG C with 0.5 DEG C/min~1.5 DEG C of heating rate/min；
Holding stage: 1h~4h is kept the temperature at 920 DEG C~1000 DEG C；
Temperature-fall period: after burned, cooling down, and cooling rate is 0.5 DEG C/min~2.0 DEG C/min.
10. a kind of wireless charging end RX magnetic sheet, which is characterized in that be made using manufacturing method described in claim 8 or 9.
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