CN104029281B - A kind of injection moulding method of soft magnetic ferrites - Google Patents
A kind of injection moulding method of soft magnetic ferrites Download PDFInfo
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- CN104029281B CN104029281B CN201410248297.3A CN201410248297A CN104029281B CN 104029281 B CN104029281 B CN 104029281B CN 201410248297 A CN201410248297 A CN 201410248297A CN 104029281 B CN104029281 B CN 104029281B
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- 229910000859 α-Fe Inorganic materials 0.000 title claims abstract description 49
- 238000001746 injection moulding Methods 0.000 title claims abstract description 19
- 239000000843 powder Substances 0.000 claims abstract description 48
- 238000002156 mixing Methods 0.000 claims abstract description 35
- 238000000227 grinding Methods 0.000 claims abstract description 30
- 239000000203 mixture Substances 0.000 claims abstract description 30
- 238000000465 moulding Methods 0.000 claims abstract description 22
- 238000005245 sintering Methods 0.000 claims abstract description 21
- 239000011230 binding agent Substances 0.000 claims abstract description 11
- XSTXAVWGXDQKEL-UHFFFAOYSA-N Trichloroethylene Chemical group ClC=C(Cl)Cl XSTXAVWGXDQKEL-UHFFFAOYSA-N 0.000 claims abstract description 7
- 238000001816 cooling Methods 0.000 claims abstract description 7
- 238000010298 pulverizing process Methods 0.000 claims abstract description 7
- 229960002415 trichloroethylene Drugs 0.000 claims abstract description 7
- UBOXGVDOUJQMTN-UHFFFAOYSA-N trichloroethylene Natural products ClCC(Cl)Cl UBOXGVDOUJQMTN-UHFFFAOYSA-N 0.000 claims abstract description 7
- 238000001035 drying Methods 0.000 claims abstract description 6
- 239000002270 dispersing agent Substances 0.000 claims description 12
- 238000000034 method Methods 0.000 claims description 11
- -1 polypropylene Polymers 0.000 claims description 10
- 239000004743 Polypropylene Substances 0.000 claims description 8
- 239000004372 Polyvinyl alcohol Substances 0.000 claims description 8
- 238000000498 ball milling Methods 0.000 claims description 8
- 229920001155 polypropylene Polymers 0.000 claims description 8
- 229920002451 polyvinyl alcohol Polymers 0.000 claims description 8
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 claims description 6
- 239000013530 defoamer Substances 0.000 claims description 6
- 239000008187 granular material Substances 0.000 claims description 6
- 229910052760 oxygen Inorganic materials 0.000 claims description 6
- 239000001301 oxygen Substances 0.000 claims description 6
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 6
- 238000001238 wet grinding Methods 0.000 claims description 6
- 239000004698 Polyethylene Substances 0.000 claims description 2
- 239000012188 paraffin wax Substances 0.000 claims description 2
- 229920000573 polyethylene Polymers 0.000 claims description 2
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 abstract description 15
- 229910052742 iron Inorganic materials 0.000 abstract description 7
- 230000008901 benefit Effects 0.000 abstract description 4
- 238000010438 heat treatment Methods 0.000 abstract 1
- 238000003825 pressing Methods 0.000 description 5
- 238000001514 detection method Methods 0.000 description 4
- 230000035699 permeability Effects 0.000 description 4
- 239000002994 raw material Substances 0.000 description 4
- 238000005516 engineering process Methods 0.000 description 3
- 238000004519 manufacturing process Methods 0.000 description 3
- 238000003754 machining Methods 0.000 description 2
- 239000000696 magnetic material Substances 0.000 description 2
- 239000000463 material Substances 0.000 description 2
- 238000002360 preparation method Methods 0.000 description 2
- 239000007921 spray Substances 0.000 description 2
- 238000004891 communication Methods 0.000 description 1
- 238000005520 cutting process Methods 0.000 description 1
- 238000005286 illumination Methods 0.000 description 1
- 238000002347 injection Methods 0.000 description 1
- 239000007924 injection Substances 0.000 description 1
- 239000002245 particle Substances 0.000 description 1
- 238000007493 shaping process Methods 0.000 description 1
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B28—WORKING CEMENT, CLAY, OR STONE
- B28B—SHAPING CLAY OR OTHER CERAMIC COMPOSITIONS; SHAPING SLAG; SHAPING MIXTURES CONTAINING CEMENTITIOUS MATERIAL, e.g. PLASTER
- B28B1/00—Producing shaped prefabricated articles from the material
- B28B1/24—Producing shaped prefabricated articles from the material by injection moulding
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B02—CRUSHING, PULVERISING, OR DISINTEGRATING; PREPARATORY TREATMENT OF GRAIN FOR MILLING
- B02C—CRUSHING, PULVERISING, OR DISINTEGRATING IN GENERAL; MILLING GRAIN
- B02C17/00—Disintegrating by tumbling mills, i.e. mills having a container charged with the material to be disintegrated with or without special disintegrating members such as pebbles or balls
- B02C17/10—Disintegrating by tumbling mills, i.e. mills having a container charged with the material to be disintegrated with or without special disintegrating members such as pebbles or balls with one or a few disintegrating members arranged in the container
-
- C—CHEMISTRY; METALLURGY
- C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
- C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
- C04B35/00—Shaped ceramic products characterised by their composition; Ceramics compositions; Processing powders of inorganic compounds preparatory to the manufacturing of ceramic products
- C04B35/01—Shaped ceramic products characterised by their composition; Ceramics compositions; Processing powders of inorganic compounds preparatory to the manufacturing of ceramic products based on oxide ceramics
- C04B35/26—Shaped ceramic products characterised by their composition; Ceramics compositions; Processing powders of inorganic compounds preparatory to the manufacturing of ceramic products based on oxide ceramics based on ferrites
- C04B35/2608—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
-
- C—CHEMISTRY; METALLURGY
- C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
- C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
- C04B35/00—Shaped ceramic products characterised by their composition; Ceramics compositions; Processing powders of inorganic compounds preparatory to the manufacturing of ceramic products
- C04B35/622—Forming processes; Processing powders of inorganic compounds preparatory to the manufacturing of ceramic products
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- Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Ceramic Engineering (AREA)
- Manufacturing & Machinery (AREA)
- Materials Engineering (AREA)
- Structural Engineering (AREA)
- Organic Chemistry (AREA)
- Inorganic Chemistry (AREA)
- Food Science & Technology (AREA)
- Mechanical Engineering (AREA)
- Soft Magnetic Materials (AREA)
- Magnetic Ceramics (AREA)
Abstract
The invention discloses the injection moulding method of a kind of soft magnetic ferrite.Comprise the steps: 1) prepared by powder: ferrite powder is carried out a mix grinding, after drying, powder is carried out pre-burning, after broken for the powder after pre-burning, then carry out secondary mix grinding, and carry out dried；2) mixing granulator: by step 1) after the powder that obtains uniformly mixes with binding agent, mixing, obtain batch mixing, batch mixing is pulverized；3) injection moulding: the batch mixing heating after pulverizing, under stress, is injected in die cavity, i.e. obtains molding blank after opening mould cooling；4) defat: molding blank is inserted defat in trichloro ethylene, is dried, then carries out thermal debinding；5) sintering: the molding blank after defat is sintered, obtains soft magnetic ferrites.The present invention is suitable for preparing middle-size and small-size ferrite magnetic core part complex-shaped, high-precision, and prepared soft magnetic ferrites have the advantages that density is big and homogeneous, interior tissue is uniform, mechanical strength is high and iron loss is relatively low.
Description
Technical field
The invention belongs to magnetic material preparing technical field, be specifically related to the injection moulding method of a kind of soft magnetic ferrites.
Background technology
Soft magnetic ferrite is the soft magnetic materials that existing market demand is maximum and yield is most, is widely used in the basic industry of the national economy such as science and techniques of defence, communication, computer, radar, radio and television, medical treatment and the electronic product such as measuring instrument, abstract the recreational consumption, industry and office automation, automotive electronics, illumination.At present, in commercial production, the forming method of FERRITE CORE is the most dry-pressing formed, and this method has bigger restriction to core shapes, and it is low to there is blank strength, magnetic core internal density heterogeneity and the structural homogenity limitation such as poor, easy to crack after sintering.CN201210089388.8 provides the clamp structure of a kind of C font FERRITE CORE processing, dry-pressing formed prepared C font FERRITE CORE typically requires and carries out secondary mechanical processing, particularity due to shape, higher to the reliability requirement of the fixture needed for machining and its location, it addition, dry-pressing formed prepared ferrite mechanical strength is the highest so that machining is difficult to carry out, the most both molding procedure had been added, the most again it is difficult to ensure that the final dimensional accuracy of magnetic core.
In order to adapt to FERRITE CORE miniaturization, slimming and various shapes, need a kind of one-shot forming without the forming method of follow-up mach preparation FERRITE CORE, powder injection-molded utilize mould injection moldable blank and by sintering quickly manufacture high density, in high precision, the constitutional detail of three-dimensional complex shapes, and can directly mass-produce part.This Technology not only has without advantages such as cutting, economic benefit height, and overcome the shortcomings such as dry-pressing formed gained material is uneven, mechanical performance is low, shaping thin wall is difficult, structure is complicated, it is particularly suitable for producing small-sized, complicated and that there is particular/special requirement device in enormous quantities.
Summary of the invention
The invention aims to solve conventional dry molded be difficult to produce in batches thin-walled, complex-shaped, in high precision, the problem such as the soft magnetic ferrites of density and even tissue, simultaneously by doping micro constitutent, obtained Ferrite Material iron loss is relatively low.The injection moulding method of a kind of soft magnetic ferrites is provided.
The injection moulding method of soft magnetic ferrites comprises the steps:
1) prepared by powder: ferrite powder carries out a mix grinding, drum's speed of rotation 200 ~ 300 r/min, Ball-milling Time is 10 ~ 15 h, after drying, at 700 DEG C ~ 1000 DEG C, powder being carried out pre-burning, burn-in time is 2 ~ 4 h, after broken for the powder after pre-burning, carrying out secondary mix grinding again, it is 0.5 ~ 2 μm that powder is milled to granularity, then is dried process；
2) mixing granulator: by step 1) after the powder that obtains uniformly mixes with binding agent, at 100 DEG C ~ 250 DEG C, mixing 1 ~ 3 h, obtains batch mixing, and batch mixing is crushed to the granule of mean diameter 6 ~ 8 mm；
3) injection moulding: the batch mixing after pulverizing is heated to 100 DEG C ~ 250 DEG C, under the conditions of pressure is 75 ~ 200 bar, is injected in die cavity, i.e. obtains molding blank after opening mould cooling；
4) defat: molding blank is inserted in trichloro ethylene, defat 5 ~ 8 h at 40 DEG C ~ 60 DEG C, it is dried, then carries out thermal debinding at 400 DEG C ~ 800 DEG C；
5) sintering: being sintered at temperature is 1300 DEG C ~ 1450 DEG C by the molding blank after defat, sintering time is 2 ~ 6 h, and during sintering, in stove, partial pressure of oxygen is maintained at 2 ~ 8%, obtains soft magnetic ferrites.
Described ferrite powder accounts for 70 wt% ~ 88 wt% of total amount, and binding agent accounts for the 12 of total amount
wt%~30 wt%.Consisting of of described ferrite powder: the Fe of 65 wt% ~ 75 wt%2O3、15
The Mn of wt% ~ 25 wt%3O4, the ZnO of 5 wt% ~ 10 wt%, the CaCO of 0.2 wt% ~ 0.5 wt%3, the SiO of 0.02 wt% ~ 0.05 wt%2.Consisting of of described binding agent: the paraffin of 50 wt% ~ 65 wt%, 15
The polyvinyl alcohol of wt% ~ 25 wt%, the polyethylene of 10 wt% ~ 15 wt% and the polypropylene of 10 wt% ~ 15 wt%.A described mix grinding and secondary mix grinding all use wet grinding, add when a mix grinding and secondary mix grinding and account for ferrite powder 1
The dispersant of wt% ~ 2 wt%, the polyvinyl alcohol of 5 wt% ~ 10 wt% and the defoamer of 0.1 wt% ~ 0.2 wt%, wherein dispersant is made up of water and polypropylene.
Advantages of the present invention: efficiently solve dry-pressing formed method and be directed to middle-size and small-size FERRITE CORE production and processing complex-shaped, high-precision difficulty, the soft magnetic ferrites prepared by the inventive method have that density is big and homogeneous, interior tissue is uniform, mechanical strength is high and the feature such as iron loss is relatively low.
Accompanying drawing explanation
Fig. 1 is the preparation technology flow chart that the present invention prepares soft magnetic ferrites.
Specific embodiment
Embodiment 1
The raw material that the present embodiment is chosen is the most as shown in table 1:
Table 1
It is as follows that ferrite step is prepared in injection moulding:
(1) prepared by powder: ferrite powder carries out a mix grinding, drum's speed of rotation 200
R/min, Ball-milling Time 10 h, dried with spray dryer, powder is carried out pre-burning at 700 DEG C, burn-in time is 2 h, after broken for the powder after pre-burning, then carries out secondary mix grinding, and powder is milled to granularity and is
0.5 ~ 2 μm, and be dried with spray dryer.Wherein, a mix grinding and secondary mix grinding all use wet grinding to carry out, and add the dispersant of 1 wt%, the polyvinyl alcohol of 8 wt%, the defoamer of 0.1 wt%, and wherein dispersant is made up of water and polypropylene.
(2) mixing granulator: by step 1) after the powder that obtains uniformly mixes with binding agent, at 100 DEG C, mixing 3 h, obtain batch mixing, and batch mixing is crushed to the granule of mean diameter 6 mm；
(3) injection moulding: the batch mixing after pulverizing is heated to 100 DEG C, under the conditions of pressure is 75 bar, is injected in die cavity, i.e. obtains molding blank after opening mould cooling；
(4) defat: molding blank is inserted in trichloro ethylene, defat 8 h at 40 DEG C, it is dried, then at 400 DEG C, carries out thermal debinding
(5) sintering: being sintered at temperature is 1300 DEG C by the molding blank after defat, sintering time is 6 h, and during sintering, in stove, partial pressure of oxygen is maintained at 2%, obtains soft magnetic ferrites.
The soft magnetic ferrites finally given are carried out performance detection, and including density, radially tensile strength, initial permeability and iron loss, test result is shown in Table 5.
Embodiment 2
The raw material that the present embodiment is chosen is the most as shown in table 2:
Table 2
It is as follows that ferrite step is prepared in injection moulding:
(1) prepared by powder: ferrite powder carries out a mix grinding, drum's speed of rotation 225
R/min, Ball-milling Time 12 h, after drying, carry out pre-burning, burn-in time 2 h by powder at 800 DEG C, after broken for the powder after pre-burning, then carry out secondary mix grinding, and powder is milled to granularity 0.5 ~ 2
μm, is dried the most again.Wherein, a mix grinding and secondary mix grinding all use wet grinding to carry out, and add the dispersant of 2 wt%, the polyvinyl alcohol of 5 wt%, the defoamer of 0.15 wt%, and wherein dispersant is made up of water and polypropylene.
(2) mixing granulator: by step 1) after the powder that obtains uniformly mixes with binding agent, at 150 DEG C, mixing 3 h, obtain batch mixing, and batch mixing is crushed to the granule of mean diameter 6 mm；
(3) injection moulding: the batch mixing after pulverizing is heated to 150 DEG C, under the conditions of pressure is 100 bar, is injected in die cavity, i.e. obtains molding blank after opening mould cooling；
(4) defat: molding blank is inserted in trichloro ethylene, defat 6 h at 40 DEG C, it is dried, then at 500 DEG C, carries out thermal debinding；
(5) sintering: being sintered at temperature is 1350 DEG C by the molding blank after defat, sintering time is 4 h, and during sintering, in stove, partial pressure of oxygen is maintained at 4%, obtains soft magnetic ferrites.
The soft magnetic ferrites finally given are carried out performance detection, and including density, radially tensile strength, initial permeability and iron loss, test result is shown in Table 5.
Embodiment 3
The raw material that the present embodiment is chosen is the most as shown in table 3:
Table 3
It is as follows that ferrite step is prepared in injection moulding:
(1) prepared by powder: ferrite powder carries out a mix grinding, drum's speed of rotation 250
R/min, Ball-milling Time 14 h, after drying, carry out pre-burning, burn-in time 3 h by powder at 900 DEG C, after broken for the powder after pre-burning, then carry out secondary mix grinding, and Ball-milling Time 2 h, after ball milling, powder particles is 0.5 ~ 2 μm, is dried process the most again.Wherein, a mix grinding and secondary mix grinding all use wet grinding to carry out, and add the dispersant of 1 wt%, the polyvinyl alcohol of 8 wt%, the defoamer of 0.2 wt%, and wherein dispersant is made up of water and polypropylene.
(2) mixing granulator: by step 1) after the powder that obtains uniformly mixes with binding agent, at 200 DEG C, mixing 1 h, obtains batch mixing, and batch mixing is crushed to the granule of mean diameter 8 mm；
(3) injection moulding: the batch mixing after pulverizing is heated to 200 DEG C, under the conditions of pressure is 150 bar, is injected in die cavity, i.e. obtains molding blank after opening mould cooling；
(4) defat: molding blank is inserted trichloro ethylene defat 6 h at 60 DEG C, is dried, then carries out thermal debinding at 600 DEG C；
(5) sintering: being sintered at temperature is 1400 DEG C by the molding blank after defat, sintering time is 3 h, and during sintering, in stove, partial pressure of oxygen is maintained at 6%, obtains soft magnetic ferrites.
The soft magnetic ferrites finally given are carried out performance detection, and including density, radially tensile strength, initial permeability and iron loss, test result is shown in Table 5.
Embodiment 4
The raw material that the present embodiment is chosen is the most as shown in table 4:
Table 4
It is as follows that ferrite step is prepared in injection moulding:
(1) prepared by powder: ferrite powder carries out a mix grinding, drum's speed of rotation 300
R/min, Ball-milling Time 15 h, after drying, carry out pre-burning, burn-in time 3 h by powder at 1000 DEG C, after broken for the powder after pre-burning, then carry out secondary mix grinding, and it is 0.5 ~ 2 that powder is milled to granularity
μm, and it is dried process the most again.Wherein, a mix grinding and secondary mix grinding all use wet grinding to carry out, and add the dispersant of 2 wt%, the polyvinyl alcohol of 10wt%, the defoamer of 0.2 wt%, and wherein dispersant is made up of water and polypropylene.
(2) mixing granulator: by step 1) after the powder that obtains uniformly mixes with binding agent, at 250 DEG C, mixing 1 h, obtains batch mixing, and batch mixing is crushed to the granule of mean diameter 8 mm；
(3) injection moulding: the batch mixing after pulverizing is heated to 250 DEG C, under the conditions of pressure is 200 bar, is injected in die cavity, i.e. obtains molding blank after opening mould cooling；
(4) defat: molding blank is inserted trichloro ethylene defat 5 h at 60 DEG C, is dried, then carries out thermal debinding at 800 DEG C；
(5) sintering: being sintered at temperature is 1450 DEG C by the molding blank after defat, sintering time is 2 h, and during sintering, in stove, partial pressure of oxygen is maintained at 8%, obtains soft magnetic ferrites.
The soft magnetic ferrites finally given are carried out performance detection, and including density, radially tensile strength, initial permeability and iron loss, test result is shown in Table 5.
Table 5
Claims (2)
1. the injection moulding method of soft magnetic ferrites, it is characterised in that comprise the steps:
1) prepared by powder: ferrite powder carries out a mix grinding, drum's speed of rotation 200 ~ 300
R/min, Ball-milling Time is 10 ~ 15 h, after drying, at 700 DEG C ~ 1000 DEG C, powder is carried out pre-burning, and burn-in time is 2 ~ 4 h, after broken for the powder after pre-burning, then carries out secondary mix grinding, and it is 0.5 ~ 2 μm that powder is milled to granularity, then is dried process；Consisting of of described ferrite powder: the Fe of 65 wt% ~ 75 wt%2O3, the Mn of 15 wt% ~ 25 wt%3O4, the ZnO of 5 wt% ~ 10 wt%, the CaCO of 0.2 wt% ~ 0.5 wt%3, the SiO of 0.02 wt% ~ 0.05 wt%2；A described mix grinding and secondary mix grinding all use wet grinding, adding when a mix grinding and secondary mix grinding and account for the dispersant of ferrite powder 1 wt% ~ 2 wt%, the polyvinyl alcohol of 5 wt% ~ 10 wt% and the defoamer of 0.1 wt% ~ 0.2 wt%, wherein dispersant is made up of water and polypropylene；
2) mixing granulator: by step 1) after the powder that obtains uniformly mixes with binding agent, at 100 DEG C ~ 250 DEG C, mixing 1 ~ 3 h, obtains batch mixing, and batch mixing is crushed to the granule of mean diameter 6 ~ 8 mm；Described ferrite powder accounts for 70 wt% ~ 88 wt% of total amount, and binding agent accounts for 12 wt% ~ 30 wt% of total amount;
3) injection moulding: the batch mixing after pulverizing is heated to 100 DEG C ~ 250 DEG C, under the conditions of pressure is 75 ~ 200 bar, is injected in die cavity, i.e. obtains molding blank after opening mould cooling；
4) defat: molding blank is inserted in trichloro ethylene, defat 5 ~ 8 h at 40 DEG C ~ 60 DEG C, it is dried, then 400
DEG C ~ 800 DEG C at carry out thermal debinding；
5) sintering: being sintered at temperature is 1300 DEG C ~ 1450 DEG C by the molding blank after defat, sintering time is 2 ~ 6 h, and during sintering, in stove, partial pressure of oxygen is maintained at 2 ~ 8%, obtains soft magnetic ferrites.
Injection moulding method the most according to claim 1, it is characterised in that: consisting of of described binding agent: the paraffin of 50 wt% ~ 65 wt%, the polyvinyl alcohol of 15 wt% ~ 25 wt%, the polyethylene of 10 wt% ~ 15 wt% and the polypropylene of 10 wt% ~ 15 wt%.
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| CN105810427B (en) * | 2016-05-13 | 2017-11-17 | 郎溪亚博磁电科技有限公司 | The production technology of high-strength abrasion-proof automobile ABS system control signal device |
| CN106630994B (en) * | 2017-01-10 | 2019-12-13 | 湖南艾迪奥电子科技有限公司 | Manganese-zinc ferrite magnetic material and preparation method of manganese-zinc ferrite magnetic ring |
| CN108189418A (en) * | 2017-12-28 | 2018-06-22 | 上海宝钢磁业有限公司 | With reference to the manganese-zinc ferrite core forming process of injection-moulding plastic |
| CN108568522B (en) * | 2018-04-27 | 2021-07-16 | 安徽省瀚海新材料股份有限公司 | Method for recycling and efficiently utilizing neodymium iron boron ultrafine powder |
| CN108640669A (en) * | 2018-06-20 | 2018-10-12 | 陕西理工大学 | A kind of high performance ferrite magnetic material and preparation method thereof |
| CN117361632A (en) * | 2022-06-30 | 2024-01-09 | 横店集团东磁股份有限公司 | Co 2 Z-type ferrite magnetic powder, preparation method thereof and magnetic plastic composite material |
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| JPH06260323A (en) * | 1993-03-03 | 1994-09-16 | Nippon Steel Corp | Mn-zn ferrite temporary baked powder for obtaining core with high saturation magnetic flux density and low loss |
| CN101241791A (en) * | 2007-02-06 | 2008-08-13 | 昆山尼赛拉电子器材有限公司 | Wide-temperature and low-consumption Mn-Zn soft magnetic ferrite and its production method |
| CN101483092B (en) * | 2008-01-16 | 2011-08-24 | 横店集团东磁股份有限公司 | Producing method of high saturation magnetic flux density low loss soft magnetic ferrite material |
| CN101863656A (en) * | 2009-12-29 | 2010-10-20 | 广东风华高新科技股份有限公司 | Mn-Zn soft magnetic ferrite for saving energy and lighting, and preparation method of obtained magnetic core |
| CN101921102B (en) * | 2010-07-09 | 2013-07-03 | 广东风华高新科技股份有限公司 | Method for preparing high-precision and high-stability temperature control manganese zinc (Mn-Zn) soft magnetic ferrite material and magnetic core product obtained thereby |
| CN102225574A (en) * | 2011-06-16 | 2011-10-26 | 北京科技大学 | Injection molding method of temperature sensitive ferrite |
| CN102690106A (en) * | 2011-11-23 | 2012-09-26 | 横店集团东磁股份有限公司 | High-saturation-flux-density MnZn ferrite material and preparation method thereof |
| CN102642240B (en) * | 2012-04-25 | 2013-12-25 | 深圳顺络电子股份有限公司 | Manufacture method of ferrite core blank and ferrite core |
| CN103396109B (en) * | 2013-06-26 | 2014-11-26 | 蚌埠市高华电子有限公司 | High-frequency low-loss soft magnetic ferrite core material and its preparation method |
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