CN110436911A - A kind of soft magnetic materials and preparation method thereof and the application in automobile electronic system - Google Patents

A kind of soft magnetic materials and preparation method thereof and the application in automobile electronic system Download PDF

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Publication number
CN110436911A
CN110436911A CN201910769912.8A CN201910769912A CN110436911A CN 110436911 A CN110436911 A CN 110436911A CN 201910769912 A CN201910769912 A CN 201910769912A CN 110436911 A CN110436911 A CN 110436911A
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soft magnetic
magnetic materials
temperature
principal component
preparation
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CN110436911B (en
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张凯
傅膑
刘培元
孔令才
谢振华
陈创鑫
余春成
谭翔滨
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RUYUAN DONG YANG GUANG MATERIALS CO Ltd
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RUYUAN DONG YANG GUANG MATERIALS CO Ltd
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    • C04B35/01—Shaped ceramic products characterised by their composition; Ceramics compositions; Processing powders of inorganic compounds preparatory to the manufacturing of ceramic products based on oxide ceramics
    • C04B35/26—Shaped ceramic products characterised by their composition; Ceramics compositions; Processing powders of inorganic compounds preparatory to the manufacturing of ceramic products based on oxide ceramics based on ferrites
    • C04B35/2608—Compositions containing one or more ferrites of the group comprising manganese, zinc, nickel, copper or cobalt and one or more ferrites of the group comprising rare earth metals, alkali metals, alkaline earth metals or lead
    • C04B35/2633—Compositions containing one or more ferrites of the group comprising manganese, zinc, nickel, copper or cobalt and one or more ferrites of the group comprising rare earth metals, alkali metals, alkaline earth metals or lead containing barium, strontium or calcium
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    • C04B35/622—Forming processes; Processing powders of inorganic compounds preparatory to the manufacturing of ceramic products
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    • H01—ELECTRIC ELEMENTS
    • H01F—MAGNETS; INDUCTANCES; TRANSFORMERS; SELECTION OF MATERIALS FOR THEIR MAGNETIC PROPERTIES
    • H01F1/00—Magnets or magnetic bodies characterised by the magnetic materials therefor; Selection of materials for their magnetic properties
    • H01F1/01—Magnets or magnetic bodies characterised by the magnetic materials therefor; Selection of materials for their magnetic properties of inorganic materials
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    • H01F41/00—Apparatus or processes specially adapted for manufacturing or assembling magnets, inductances or transformers; Apparatus or processes specially adapted for manufacturing materials characterised by their magnetic properties
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Abstract

Application the invention discloses a kind of soft magnetic materials and preparation method thereof and in automobile electronic system.Soft magnetic materials includes principal component and accessory ingredient, and wherein principal component includes Fe2O3, MnO, ZnO, the mass percent of the accessory ingredient component are as follows: CaCO3, V2O5, Nb2O5, SnO2, Co2O3, TiO2, ZrO2, NiO.The present invention obtains one kind and can have low-loss and high saturation magnetic flux material at -20~140 DEG C by specific component and its content proportion setting, loss objective has preferable wide temperature characteristics, and there is high saturation magnetic flux density, pass through powder proportion optimizing and special segmented cooling sintering process in soft magnetic materials preparation process, the performance for realizing ultra-wide temperature low-power consumption and high saturation magnetic flux density is taken into account, product temperature adaptability is wide, the big environment of the global temperature difference can be coped with, it is widely used in automobile electronic system field, it is ensured that stability.

Description

A kind of soft magnetic materials and preparation method thereof and the application in automobile electronic system
Technical field
The present invention relates to soft magnetic materials technical field, more particularly, to a kind of soft magnetic materials and preparation method thereof and Application in automobile electronic system.
Background technique
The electronic functional material that soft magnetic ferrite is excellent as a kind of electrical characteristic, different shape size is easily worked, Gradually become the core original part of vehicle-mounted magnetic element.As magnetic material is in automotive electronics universalness, global rugged environment pair The ambient temperature requirements of magnetic core used are increasingly stringenter, and reply terrestrial pole temperature is low, it is desirable that magnetic core is using temperature by tradition 25 DEG C~120 DEG C expand to -20 DEG C~140 DEG C, under the premise of requiring material saturation flux not reduce at this temperature, loss exists In lower range, to improve output power.
The power material of volume production copes with vehicle-mounted series and needs wide-temperature and low-consumption characteristic (- 20 DEG C~140 DEG C) at present, often without Method takes into account high saturation magnetic flux characteristic, and reason is to reduce loss, generally requires to do in sintering and sacrifice, cause saturated characteristic compared with Difference is unable to satisfy vehicle-mounted big product height superposition demand only in 410mT or so.And the magnetic material with high saturation magnetic flux is past It is relatively high toward overall losses, it is just become apparent from (120 DEG C or more) the loss deteriorations of low temperature (0 DEG C or less) and high temperature, transformer work When, magnetic core temperature, which obviously rises, causes superposition to decline, and efficiency reduces, therefore there is an urgent need to take into account wide temperature (- 20 DEG C~140 in market DEG C) and high saturation magnetic flux material, cope with the demand of automotive electronics.Prior art CN102424573A discloses a kind of wide warm low damage Consume ferrite in manganese zinc series and preparation method thereof, wherein the temperature of prepared soft magnetic ferrite also can only achieve 25 DEG C~ 140 DEG C, low-loss requirement is unable to satisfy for -20 DEG C -0 DEG C.
Summary of the invention
The technical problem to be solved by the present invention is to overcome existing soft magnetic ferrites can not be in -20 DEG C~140 DEG C of ring The defect and deficiency that low-loss, high saturation magnetic flux density are realized under border, provide a kind of soft magnetic materials.
Another object of the present invention is to provide a kind of preparation methods of soft magnetic materials.
Another object of the present invention is to provide application of the above-mentioned soft magnetic materials in automobile electronic system.
Above-mentioned purpose of the present invention is achieved through the following technical solutions:
A kind of soft magnetic materials, the principal component comprising following content: Fe2O3For 54~58mol%, MnO be 30~35mol%, Surplus is ZnO；The total weight of opposite principal component also includes the accessory ingredient of following content: CaCO3For 0.02~0.04wt%, TiO2 For 0.02~0.1wt%, Nb2O5For 0.02~0.05wt%, ZrO20~0.02wt%, V2O5For 0.01~0.1wt%, SnO For 0.01~0.04wt%, Co2O3For 0.3-0.4wt%, NiO 0-0.1%wt%.
The present invention is matched using ternary principal component and additive combination, is mixed by raw material, pre-burning, addition additive, Molding is sintered and is made, and principal component formula therein is the optimization basis of subsequent combined additive accessory ingredient, and use is unique Additive combination promotes green compact obtained to be easy to be sintered, more refine crystal grain, grows the crystal grain distribution more uniformly refined, together The time control combinations circle porosity, generates the microstructure of dense uniform, forms higher sintered density, takes into account wide temperature damage to obtain Consumption and high saturation magnetic flux density, high DC stacked soft magnetic materials.
Soft magnetic materials of the invention all has low-loss at -20 DEG C~140 DEG C, and high saturation magnetic flux density has wide Wen Te Property, it significantly decreases compared to traditional wide adiabator in -20 DEG C~0 DEG C and 120 DEG C~140 DEG C losses.
Preferably, the principal component comprising following content: Fe2O3For 55.2~55.7mol%, MnO be 34.5~ 34.8mol%, surplus ZnO.It such as can be Fe2O3For 55.5mol%, MnO 34.5mol%, surplus ZnO；Fe2O3 For 55.2mol%, MnO 34.8mol%, surplus ZnO；Fe2O3For 55.5mol%, MnO 34.8mol%, surplus ZnO Or Fe2O3For 55.7mol%, MnO 34.8mol%, surplus ZnO.
Preferably, the soft magnetic materials is at 100KHz, 200mT, power consumption P≤360mw/cm at -20 DEG C3, power consumption at 0 DEG C P≤320mw/cm3, power consumption P≤290mw/cm at 25 DEG C3, power consumption P≤270mw/cm at 80 DEG C3, power consumption P at 100 DEG C≤ 280mw/cm3, power consumption P≤320mw/cm at 120 DEG C3, power consumption P≤370mw/cm at 140 DEG C3。
Preferably, saturation flux density Bs >=540mT at 25 DEG C of the soft magnetic materials, 100 DEG C of whens the soft magnetism material Saturation flux density Bs >=430mT of material.
Preferably, Curie temperature Tc >=220 DEG C of the soft magnetic materials, density p >=4.90 × 103kg/m3。
The present invention also protects the preparation method of the soft magnetic materials, includes the following steps:
S1. principal component content is matched, mixing is broken, and poly-vinyl alcohol solution is added after recycling mixing；
S2. it will be put into pre-burning stove through broken mixed principal component and carry out pre-burning；
S3. accessory ingredient is added in the principal component of preheating, water, polyvinyl alcohol and defoaming agent is added and carries out secondary break It is broken, the levigate powder that granularity is 0.8~0.9 μm is made；
S4. levigate powder is subjected to mist projection granulating, 50~200 μm of spraying powder is made, by spraying powder compression moulding, It is 3.00~3.05g/cm that density, which is made,3Green compact；
S5., it is sintered under the conditions of green compact to be controlled to 1260~1300 DEG C of temperature in atmosphere furnace, segmented is cooled to room temperature, Soft magnetic materials is prepared.
It being pre-sintered principal component in S3 of the present invention, secondary broken Cui after auxiliary ingredient is added, material activity can be improved in levigate granularity, Cooperate relatively low sintering temperature, reduces material loss.
And raw embryo green density will affect properties of product to a certain extent in S4 of the invention, (be lower than when density is too low 3.00), product sintered density can be not achieved technique and require and deteriorate performance, and from the point of view of 3 yuan of materials of MnZn system, density is higher than 3.05 When above, performance improvement is unobvious, therefore defines density between 3.00-3.05.
The preparation method of soft magnetic materials of the present invention cooperates pre-burning and sintering process control, promotees on the basis of component formula Into crystal grain refinement, homogenization distribution, it is simple and direct, efficiently production be made at wide temperature have higher saturation flux density Bs, Curie temperature also higher soft magnetic materials.
Preferably, it is crushed described in S1 and continues 25~35min, the circulation mixing continues 8~15min.Of the invention It can be mixed within the scope of broken incorporation time more uniform.
Preferably, the secondary sand milling duration is 70~100min in S3.The secondary sand milling duration is in order to ensure in S3 It can obtain the levigate powder that granularity is 0.8~0.9 μm.
Preferably, calcined temperature described in S2 is 800~890 DEG C, and burn-in time is 2.5~3.5h.Pre-burning is ferrite First sintering, it is therefore an objective to which partial solid phase reaction forms 10% spinelle, while by once sintered, direct sintering being avoided to receive It contracts excessive, causes cracking and performance bad.
Preferably, segmented described in S5 cools down are as follows: and 1200 DEG C are cooled to, 30min is kept the temperature, continues to be cooled to 1160 DEG C, Heat preservation 20 minutes, then cools to room temperature.
Preferably, the partial pressure of oxygen in sintering atmosphere described in S3 is 2~3%, and surplus is nitrogen partial pressure.Discrete control sintering drop Warm rate and partial pressure of oxygen effectively control product loss.
It is highly preferred that sintering temperature is 1260 DEG C, sintering time 5h in S5, the partial pressure of oxygen in sintering atmosphere is 3%.
The above-mentioned preparation method of soft magnetic materials of the present invention, on sintering process: by control heating rate (0.5-2 DEG C/ Min), further promote to protect crystal grain densification growth slowly to heat up；By control soaking time and partial pressure of oxygen, to control gas in material Hole size and quantity；Soaking time is appropriately extended, promotion solid phase reaction is complete, grain growth is uniform, reduces stomata and out-phase.Drop Thermophase uses segmented cooling mode, is suitably kept the temperature at 1200 DEG C, 1160 DEG C, reduces material internal-external temperature difference, really It protects atmosphere more to match with temperature, atmosphere is adjusted with reference to partial pressure of oxygen formula, to obtain the manganese of high density high saturation magnetic flux density Zinc ferrite material.
Application of the above-mentioned soft magnetic materials in automobile electronic system is also within protection scope of the present invention.The present invention provides A kind of elastomeric material for taking into account wide-temperature and low-consumption and high full magnetic flux density, the material combination special sintering technique of ternary formula, energy It enough provides cost performance high magnetic core to be vehicle-mounted, has compared to traditional wide adiabator in -20 DEG C~0 DEG C and 120 DEG C~140 DEG C losses Apparent decline is suitble to automobile to use in the big environment of the global temperature difference of reply, improves operation stability, wide market.
Compared with prior art, the beneficial effects of the present invention are:
(1) the present invention provides a kind of soft magnetic materials, are matched using ternary principal component and accessory ingredient combination, are grown more For the crystal grain distribution uniformly refined, while grain boundary porosity rate is controlled, generates the microstructure of dense uniform, form higher sintering Density, so that the soft magnetic materials for taking into account wide temperature loss and high saturation magnetic flux density is obtained, in -20 DEG C, 100KHz, 200mT of function Rate loss is only 341mw/cm3, the power loss under 140 DEG C, 100KHz, 200mT is only 358mw/cm3, saturation at 25 DEG C Magnetic flux density Bs is up to 548mT, and saturation flux density Bs at 100 DEG C is up to 439mT.
(2) the present invention provides a kind of preparation methods of soft magnetic materials, further promote to protect crystal grain by control sintering process Densification is grown, and pore opening and quantity in control sintering rate of temperature fall and partial pressure of oxygen control material promote solid phase reaction complete, brilliant Grain growth is uniform, reduces stomata and out-phase, and temperature-fall period uses segmented cooling mode, suitably kept the temperature, and reduces inside and outside material The temperature difference, it is ensured that atmosphere is more matched with temperature, to obtain the manganese-zinc ferrite of high density high saturation magnetic flux density and more low-power consumption Material.
(3) soft magnetic materials of the invention all has low-loss at -20 DEG C~140 DEG C, and high saturation magnetic flux density has wide temperature Characteristic can provide cost performance high magnetic core to be vehicle-mounted, be suitble to automobile coping with the big environment use of the global temperature difference, help to mention High operation stability.
Detailed description of the invention
Fig. 1 is the sintering temperature lowering curve of the present invention and conventional sintering.
Specific embodiment
The present invention is further illustrated With reference to embodiment, but embodiment the present invention is not done it is any The restriction of form.Unless otherwise indicated, source chemicals used in the embodiment of the present invention are the source chemicals routinely bought.
Embodiment 1
A kind of soft magnetic materials, the principal component comprising following content: Fe2O355.5mo1%；MnO34.5mo1%； ZnO10mo1%；The total weight of opposite principal component also includes the accessory ingredient of following content: 0.03wt%CaCO3, 0.08wt% TiO2, 0.03wt%Nb2O5, 0.02wt%ZrO2, 0.03wt%V2O5, 0.02wt%SnO, 0.35wt%Co2O3, 0.02wt% NiO。
Preparation method includes the following steps:
S1. principal component raw material is weighed, certain proportion deionized water is then added in sand mill and carries out mixing and breaking up, breaks It broken 30 minutes, carries out circulation mixing and a certain amount of PVA solution is added after ten minutes, carry out mist projection granulating；
S2. spraying material is put into pre-burning stove, progress pre-burning in 3 hours is kept the temperature at 870 DEG C；
S3. the following auxiliary element for pressing Preburning material weight percent is added in Preburning material, powder is then put into sand milling Deionized water is added in machine and carries out secondary sand milling, the planetary ball mill time is 90 minutes, and powder particles are controlled at 0.75~0.85 μm；
S4. a certain proportion of PVA and defoaming agent are added in secondary sand milling, then in spray tower carry out mist projection granulating at 100 μm of particle, then forms, and sample ring green density is in 3.05g/cm3Left and right；
S5. under the ratio of certain oxygen and nitrogen, 5 hours are kept the temperature under the conditions of 1260 DEG C of temperature and is sintered, sintering When partial pressure of oxygen be 3%, then use segmented cooling mode, 1200 DEG C keep the temperature 30 minutes, 1160 heat preservation 20 minutes, in appropriate oxygen Divide and (default conventional partial pressure of oxygen in the industry) under voltage-controlled system and is cooled to room temperature.
Embodiment 2
A kind of soft magnetic materials, the principal component comprising following content: Fe2O355.2mo1%；MnO34.8mo1%； ZnO10mo1%；The total weight of opposite principal component also includes the accessory ingredient of following content: 0.03wt%CaCO3, 0.1wt%TiO2、 0.03wt%Nb2O5, 0.02wt%ZrO2, 0.03wt%V2O5, 0.013wt%SnO, 0.35wt%Co2O3, 0.05wt%NiO.
Preparation method includes the following steps:
S1. principal component raw material is weighed, certain proportion deionized water is then added in sand mill and carries out mixing and breaking up, breaks It broken 30 minutes, carries out circulation mixing and a certain amount of PVA solution is added after ten minutes, carry out mist projection granulating；
S2. spraying material is put into pre-burning stove, progress pre-burning in 3 hours is kept the temperature at 850 DEG C；
S3. the following auxiliary element for pressing Preburning material weight percent is added in Preburning material, powder is then put into sand milling Deionized water is added in machine and carries out secondary sand milling, the planetary ball mill time is 90 minutes, and powder particles are controlled at 0.75~0.85 μm；
S4. a certain proportion of PVA and defoaming agent are added in secondary sand milling, then in spray tower carry out mist projection granulating at 100 μm of particle, then forms, and sample ring green density is in 3.05g/cm3Left and right；
S5. under the ratio of certain oxygen and nitrogen, 5 hours are kept the temperature under the conditions of 1260 DEG C of temperature and is sintered, sintering When partial pressure of oxygen be 3%, then use segmented cooling mode, 1200 DEG C keep the temperature 30 minutes, 1160 heat preservation 20 minutes, in appropriate oxygen Room temperature is cooled under partial pressure control.
Embodiment 3
A kind of soft magnetic materials, the principal component comprising following content: Fe2O355.5mo1%；MnO34.8mo1%； ZnO9.7mo1%；The total weight of opposite principal component also includes the accessory ingredient of following content: 0.03wt%CaCO3, 0.1wt% TiO2, 0.03wt%Nb2O5, 0.02wt%ZrO2, 0.02wt%V2O5, 0.013wt%SnO, 0.4wt%Co2O3, 0.05wt% NiO。
Preparation method includes the following steps:
S1. principal component raw material is weighed, certain proportion deionized water is then added in sand mill and carries out mixing and breaking up, breaks It broken 30 minutes, carries out circulation mixing and a certain amount of PVA solution is added after ten minutes, carry out mist projection granulating；
S2. spraying material is put into pre-burning stove, progress pre-burning in 3 hours is kept the temperature at 890 DEG C；
S3. the following auxiliary element for pressing Preburning material weight percent is added in Preburning material, powder is then put into sand milling Deionized water is added in machine and carries out secondary sand milling, the planetary ball mill time is 90 minutes, and powder particles are controlled at 0.75~0.85 μm；
S4. a certain proportion of PVA and defoaming agent are added in secondary sand milling, then in spray tower carry out mist projection granulating at 100 μm of particle, then forms, and sample ring green density is in 3.05g/cm3Left and right；
S5. under the ratio of certain oxygen and nitrogen, 5 hours are kept the temperature under the conditions of 1260 DEG C of temperature and is sintered, sintering When partial pressure of oxygen be 3%, then use segmented cooling mode, 1200 DEG C keep the temperature 30 minutes, 1160 heat preservation 20 minutes, in appropriate oxygen Room temperature is cooled under partial pressure control.
Embodiment 4
A kind of soft magnetic materials, the principal component comprising following content: Fe2O355.7mo1%；MnO34.5mo1%； ZnO9.8mo1%；The total weight of opposite principal component also includes the accessory ingredient of following content: 0.03wt%CaCO3, 0.04wt% TiO2, 0.03wt%Nb2O5, 0.01wt%ZrO2, 0.01wt%V2O5And 0.02wt%SnO, 0.38wt%Co2O3、 0.02wt%NiO.
Preparation method includes the following steps:
S1. principal component raw material is weighed, certain proportion deionized water is then added in sand mill and carries out mixing and breaking up, breaks It broken 30 minutes, carries out circulation mixing and a certain amount of PVA solution is added after ten minutes, carry out mist projection granulating；
S2. spraying material is put into pre-burning stove, progress pre-burning in 3 hours is kept the temperature at 850 DEG C；
S3. the following auxiliary element for pressing Preburning material weight percent is added in Preburning material, powder is then put into sand milling Deionized water is added in machine and carries out secondary sand milling, the planetary ball mill time is 90 minutes, and powder particles are controlled at 0.75~0.85 μm；
S4. a certain proportion of PVA and defoaming agent are added in secondary sand milling, then in spray tower carry out mist projection granulating at 100 μm of particle, then forms, and sample ring green density is in 3.05g/cm3Left and right；
S5. under the ratio of certain oxygen and nitrogen, 5 hours are kept the temperature under the conditions of 1260 DEG C of temperature and is sintered, sintering When partial pressure of oxygen be 3%, then use segmented cooling mode, 1200 DEG C keep the temperature 30 minutes, 1160 heat preservation 20 minutes, in appropriate oxygen Room temperature is cooled under partial pressure control.
Embodiment 5
A kind of soft magnetic materials, the principal component comprising following content: Fe2O355.7mo1%；MnO34.6mo1%； ZnO9.7mo1%；The total weight of opposite principal component also includes the accessory ingredient of following content: 0.03wt%CaCO3, 0.1wt% TiO2, 0.03wt%Nb2O5, 0.02wt%ZrO2, 0.02wt%V2O5, 0.015wt%SnO, 0.4wt%Co2O3, 0.03wt% NiO。
Preparation method includes the following steps:
S1. principal component raw material is weighed, certain proportion deionized water is then added in sand mill and carries out mixing and breaking up, breaks It broken 30 minutes, carries out circulation mixing and a certain amount of PVA solution is added after ten minutes, carry out mist projection granulating；
S2. spraying material is put into pre-burning stove, progress pre-burning in 3 hours is kept the temperature at 800 DEG C；
S3. the following auxiliary element for pressing Preburning material weight percent is added in Preburning material, powder is then put into sand milling Deionized water is added in machine and carries out secondary sand milling, the planetary ball mill time is 90 minutes, and powder particles are controlled at 0.75~0.85 μm；
S4. a certain proportion of PVA and defoaming agent are added in secondary sand milling, then in spray tower carry out mist projection granulating at 100 μm of particle, then forms, and sample ring green density is in 3.05g/cm3Left and right；
S5. under the ratio of certain oxygen and nitrogen, 5 hours are kept the temperature under the conditions of 1300 DEG C of temperature and is sintered, sintering When partial pressure of oxygen be 3%, then use segmented cooling mode, 1200 DEG C keep the temperature 40 minutes, 1160 heat preservation 30 minutes, in appropriate oxygen Room temperature is cooled under partial pressure control.
Embodiment 6
A kind of soft magnetic materials, the principal component comprising following content: Fe2O355.8mo1%；MnO34.7mo1%； ZnO9.5mo1%；The total weight of opposite principal component also includes the accessory ingredient of following content: 0.02wt%CaCO3, 0.1wt% TiO2, 0.03wt%Nb2O5, 0.01wt%ZrO2, 0.02wt%V2O5, 0.015wt%SnO, 0.38wt%Co2O3, 0.03wt% NiO。
Preparation method includes the following steps:
S1. principal component raw material is weighed, certain proportion deionized water is then added in sand mill and carries out mixing and breaking up, breaks It broken 30 minutes, carries out circulation mixing and a certain amount of PVA solution is added after ten minutes, carry out mist projection granulating；
S2. spraying material is put into pre-burning stove, progress pre-burning in 3 hours is kept the temperature at 890 DEG C；
S3. the following auxiliary element for pressing Preburning material weight percent is added in Preburning material, powder is then put into sand milling Deionized water is added in machine and carries out secondary sand milling, the planetary ball mill time is 90 minutes, and powder particles are controlled at 0.75~0.85 μm；
S4. a certain proportion of PVA and defoaming agent are added in secondary sand milling, then in spray tower carry out mist projection granulating at 100 μm of particle, then forms, and sample ring green density is in 3.05g/cm3Left and right；
S5. under the ratio of certain oxygen and nitrogen, 5 hours are kept the temperature under the conditions of 1300 DEG C of temperature and is sintered, sintering When partial pressure of oxygen be 3%, then use segmented cooling mode, 1200 DEG C keep the temperature 30 minutes, 1160 heat preservation 20 minutes, in appropriate oxygen Room temperature is cooled under partial pressure control.
As a result it detects
(1) density of material and Curie temperature detection
The sample sintered is subjected to density measurement with using fluid-discharge therapy, while detecting Curie temperature, testing result is shown in Table 1。
Table 1
Serial number Curie temperature (DEG C) Density (g/cm3)
Embodiment 1 235 4.92
Embodiment 2 240 4.91
Embodiment 3 240 4.92
Embodiment 4 235 4.91
Embodiment 5 245 4.93
Embodiment 6 240 4.92
(2) power consumption and saturation flux density detection
The sample sintered is tested with SY8218 instrument, specific performance see the table below 2:
Table 2
As it can be seen that the present invention, which makes standard ring (H25-15-7.5), has wide temperature characteristics at -20 DEG C -140 DEG C, at 25-120 DEG C On the basis of loss is not higher than the wide adiabator of tradition, -20-25 DEG C, 120-140 DEG C of loss are optimized.Material has high saturation simultaneously Magnetic flux, high superimposed characteristics.
Obviously, the above embodiment of the present invention be only to clearly illustrate example of the present invention, and not be pair The restriction of embodiments of the present invention.For those of ordinary skill in the art, may be used also on the basis of the above description To make other variations or changes in different ways.There is no necessity and possibility to exhaust all the enbodiments.It is all this Made any modifications, equivalent replacements, and improvements etc., should be included in the claims in the present invention within the spirit and principle of invention Protection scope within.

Claims (10)

1. a kind of soft magnetic materials, which is characterized in that the principal component comprising following content: Fe2O3For 54~58mol%, MnO 30 ~35mol%, surplus ZnO；The total weight of opposite principal component also includes the accessory ingredient of following content: CaCO3For 0.02~ 0.04wt%, TiO2For 0.02~0.1wt%, Nb2O5For 0.02~0.05wt%, ZrO20~0.02wt%, V2O5It is 0.01 ~0.1wt%, SnO are 0.01~0.04wt%, Co2O3For 0.3-0.4wt%, NiO 0-0.1%wt%.
2. soft magnetic materials as described in claim 1, which is characterized in that the principal component comprising following content: Fe2O3For 55.2~ 55.7mol%, MnO be 34.5~34.8mol%, surplus ZnO.
3. soft magnetic materials as described in claim 1, which is characterized in that the soft magnetic materials is at 100KHz, 200mT, at -20 DEG C Power consumption P≤360mw/cm3, power consumption P≤320mw/cm at 0 DEG C3, power consumption P≤290mw/cm at 25 DEG C3, power consumption P at 80 DEG C≤ 270mw/cm3, power consumption P≤280mw/cm at 100 DEG C3, power consumption P≤320mw/cm at 120 DEG C3, power consumption P≤370mw/ at 140 DEG C cm3。
4. soft magnetic materials as claimed in claim 3, which is characterized in that saturation flux density Bs at 25 DEG C of the soft magnetic materials >=540mT, 100 DEG C of whens the soft magnetic materials saturation flux density Bs >=430mT.
5. soft magnetic materials as claimed in claim 4, which is characterized in that Curie temperature Tc >=220 DEG C of the soft magnetic materials, density ρ≥4.90×103kg/m3。
6. the preparation method of soft magnetic materials described in Claims 1 to 5 any one, which comprises the steps of:
S1. principal component content is matched, mixing is broken, and poly-vinyl alcohol solution is added after recycling mixing；
S2. it will be put into pre-burning stove through broken mixed principal component and carry out pre-burning；
S3. accessory ingredient is added in the principal component of preheating, water, polyvinyl alcohol and defoaming agent is added and carries out second-time breakage, system Obtain the levigate powder that granularity is 0.8~0.9 μm；
S4. levigate powder is subjected to mist projection granulating, 50~200 μm of spraying powder is made, spraying powder compression moulding is made Density is the green compact of 3.00~3.05g/cm3；
S5., it is sintered under the conditions of green compact to be controlled to 1260~1300 DEG C of temperature in atmosphere furnace, segmented is cooled to room temperature, preparation Obtain soft magnetic materials.
7. preparation method as claimed in claim 6, which is characterized in that calcined temperature described in S2 is 800~890 DEG C, when pre-burning Between be 2.5~3.5h.
8. preparation method as claimed in claim 6, which is characterized in that the cooling of segmented described in S5 are as follows: be cooled to 1200 DEG C, protect Warm 30min continues to be cooled to 1160 DEG C, keeps the temperature 20 minutes, then cool to room temperature.
9. preparation method as claimed in claim 8, which is characterized in that the partial pressure of oxygen in sintering atmosphere described in S3 is 2~3%, Surplus is nitrogen partial pressure.
10. application of the soft magnetic materials described in Claims 1 to 5 any one in automobile electronic system.
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