CN107818856A - A kind of soft magnetic powder metallurgical material and its manufacture method - Google Patents
A kind of soft magnetic powder metallurgical material and its manufacture method Download PDFInfo
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- CN107818856A CN107818856A CN201711053094.9A CN201711053094A CN107818856A CN 107818856 A CN107818856 A CN 107818856A CN 201711053094 A CN201711053094 A CN 201711053094A CN 107818856 A CN107818856 A CN 107818856A
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- 239000000463 material Substances 0.000 title claims abstract description 38
- 239000006247 magnetic powder Substances 0.000 title claims abstract description 25
- 238000004519 manufacturing process Methods 0.000 title claims abstract description 24
- 238000000034 method Methods 0.000 title claims abstract description 21
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 claims abstract description 27
- XLOMVQKBTHCTTD-UHFFFAOYSA-N Zinc monoxide Chemical compound [Zn]=O XLOMVQKBTHCTTD-UHFFFAOYSA-N 0.000 claims abstract description 22
- 239000002245 particle Substances 0.000 claims abstract description 14
- 239000000428 dust Substances 0.000 claims abstract description 13
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Chemical compound O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 12
- 239000011787 zinc oxide Substances 0.000 claims abstract description 11
- DQMUQFUTDWISTM-UHFFFAOYSA-N O.[O-2].[Fe+2].[Fe+2].[O-2] Chemical compound O.[O-2].[Fe+2].[Fe+2].[O-2] DQMUQFUTDWISTM-UHFFFAOYSA-N 0.000 claims abstract description 10
- 239000008367 deionised water Substances 0.000 claims abstract description 8
- 229910021641 deionized water Inorganic materials 0.000 claims abstract description 8
- 238000005245 sintering Methods 0.000 claims description 13
- 238000000498 ball milling Methods 0.000 claims description 12
- 239000000843 powder Substances 0.000 claims description 4
- OAICVXFJPJFONN-UHFFFAOYSA-N Phosphorus Chemical compound [P] OAICVXFJPJFONN-UHFFFAOYSA-N 0.000 claims description 3
- 229910052698 phosphorus Inorganic materials 0.000 claims description 3
- 239000011574 phosphorus Substances 0.000 claims description 3
- 239000007787 solid Substances 0.000 claims description 3
- 238000003825 pressing Methods 0.000 claims description 2
- 230000000694 effects Effects 0.000 abstract description 3
- 238000002474 experimental method Methods 0.000 abstract description 3
- 238000012216 screening Methods 0.000 abstract description 3
- 239000000758 substrate Substances 0.000 abstract description 3
- 239000000306 component Substances 0.000 description 13
- 230000000052 comparative effect Effects 0.000 description 9
- 239000002131 composite material Substances 0.000 description 6
- 238000005516 engineering process Methods 0.000 description 6
- 229910000859 α-Fe Inorganic materials 0.000 description 5
- 238000001035 drying Methods 0.000 description 3
- 230000006872 improvement Effects 0.000 description 3
- 238000002360 preparation method Methods 0.000 description 2
- 238000012360 testing method Methods 0.000 description 2
- 239000004698 Polyethylene Substances 0.000 description 1
- HCHKCACWOHOZIP-UHFFFAOYSA-N Zinc Chemical compound [Zn] HCHKCACWOHOZIP-UHFFFAOYSA-N 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000005660 chlorination reaction Methods 0.000 description 1
- 238000004891 communication Methods 0.000 description 1
- 239000008358 core component Substances 0.000 description 1
- 238000011161 development Methods 0.000 description 1
- 238000000227 grinding Methods 0.000 description 1
- 238000011031 large-scale manufacturing process Methods 0.000 description 1
- 239000000696 magnetic material Substances 0.000 description 1
- 230000005389 magnetism Effects 0.000 description 1
- 238000002156 mixing Methods 0.000 description 1
- 239000000203 mixture Substances 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 230000003647 oxidation Effects 0.000 description 1
- 238000007254 oxidation reaction Methods 0.000 description 1
- 230000035699 permeability Effects 0.000 description 1
- -1 polyethylene Polymers 0.000 description 1
- 229920000573 polyethylene Polymers 0.000 description 1
- 238000004663 powder metallurgy Methods 0.000 description 1
- 230000008569 process Effects 0.000 description 1
- 239000007921 spray Substances 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
- 239000011701 zinc Substances 0.000 description 1
- 229910052725 zinc Inorganic materials 0.000 description 1
Classifications
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01F—MAGNETS; INDUCTANCES; TRANSFORMERS; SELECTION OF MATERIALS FOR THEIR MAGNETIC PROPERTIES
- H01F1/00—Magnets or magnetic bodies characterised by the magnetic materials therefor; Selection of materials for their magnetic properties
- H01F1/01—Magnets or magnetic bodies characterised by the magnetic materials therefor; Selection of materials for their magnetic properties of inorganic materials
- H01F1/03—Magnets or magnetic bodies characterised by the magnetic materials therefor; Selection of materials for their magnetic properties of inorganic materials characterised by their coercivity
- H01F1/12—Magnets or magnetic bodies characterised by the magnetic materials therefor; Selection of materials for their magnetic properties of inorganic materials characterised by their coercivity of soft-magnetic materials
- H01F1/34—Magnets or magnetic bodies characterised by the magnetic materials therefor; Selection of materials for their magnetic properties of inorganic materials characterised by their coercivity of soft-magnetic materials non-metallic substances, e.g. ferrites
- H01F1/342—Oxides
- H01F1/344—Ferrites, e.g. having a cubic spinel structure (X2+O)(Y23+O3), e.g. magnetite Fe3O4
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B22—CASTING; POWDER METALLURGY
- B22F—WORKING METALLIC POWDER; MANUFACTURE OF ARTICLES FROM METALLIC POWDER; MAKING METALLIC POWDER; APPARATUS OR DEVICES SPECIALLY ADAPTED FOR METALLIC POWDER
- B22F1/00—Metallic powder; Treatment of metallic powder, e.g. to facilitate working or to improve properties
- B22F1/10—Metallic powder containing lubricating or binding agents; Metallic powder containing organic material
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B22—CASTING; POWDER METALLURGY
- B22F—WORKING METALLIC POWDER; MANUFACTURE OF ARTICLES FROM METALLIC POWDER; MAKING METALLIC POWDER; APPARATUS OR DEVICES SPECIALLY ADAPTED FOR METALLIC POWDER
- B22F3/00—Manufacture of workpieces or articles from metallic powder characterised by the manner of compacting or sintering; Apparatus specially adapted therefor ; Presses and furnaces
- B22F3/12—Both compacting and sintering
- B22F3/14—Both compacting and sintering simultaneously
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01F—MAGNETS; INDUCTANCES; TRANSFORMERS; SELECTION OF MATERIALS FOR THEIR MAGNETIC PROPERTIES
- H01F1/00—Magnets or magnetic bodies characterised by the magnetic materials therefor; Selection of materials for their magnetic properties
- H01F1/01—Magnets or magnetic bodies characterised by the magnetic materials therefor; Selection of materials for their magnetic properties of inorganic materials
- H01F1/03—Magnets or magnetic bodies characterised by the magnetic materials therefor; Selection of materials for their magnetic properties of inorganic materials characterised by their coercivity
- H01F1/12—Magnets or magnetic bodies characterised by the magnetic materials therefor; Selection of materials for their magnetic properties of inorganic materials characterised by their coercivity of soft-magnetic materials
- H01F1/34—Magnets or magnetic bodies characterised by the magnetic materials therefor; Selection of materials for their magnetic properties of inorganic materials characterised by their coercivity of soft-magnetic materials non-metallic substances, e.g. ferrites
- H01F1/36—Magnets or magnetic bodies characterised by the magnetic materials therefor; Selection of materials for their magnetic properties of inorganic materials characterised by their coercivity of soft-magnetic materials non-metallic substances, e.g. ferrites in the form of particles
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01F—MAGNETS; INDUCTANCES; TRANSFORMERS; SELECTION OF MATERIALS FOR THEIR MAGNETIC PROPERTIES
- H01F41/00—Apparatus or processes specially adapted for manufacturing or assembling magnets, inductances or transformers; Apparatus or processes specially adapted for manufacturing materials characterised by their magnetic properties
- H01F41/02—Apparatus or processes specially adapted for manufacturing or assembling magnets, inductances or transformers; Apparatus or processes specially adapted for manufacturing materials characterised by their magnetic properties for manufacturing cores, coils, or magnets
- H01F41/0206—Manufacturing of magnetic cores by mechanical means
- H01F41/0246—Manufacturing of magnetic circuits by moulding or by pressing powder
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B22—CASTING; POWDER METALLURGY
- B22F—WORKING METALLIC POWDER; MANUFACTURE OF ARTICLES FROM METALLIC POWDER; MAKING METALLIC POWDER; APPARATUS OR DEVICES SPECIALLY ADAPTED FOR METALLIC POWDER
- B22F3/00—Manufacture of workpieces or articles from metallic powder characterised by the manner of compacting or sintering; Apparatus specially adapted therefor ; Presses and furnaces
- B22F3/12—Both compacting and sintering
- B22F3/14—Both compacting and sintering simultaneously
- B22F2003/145—Both compacting and sintering simultaneously by warm compacting, below debindering temperature
Landscapes
- Engineering & Computer Science (AREA)
- Power Engineering (AREA)
- Manufacturing & Machinery (AREA)
- Chemical & Material Sciences (AREA)
- Dispersion Chemistry (AREA)
- Mechanical Engineering (AREA)
- Soft Magnetic Materials (AREA)
- Powder Metallurgy (AREA)
Abstract
The present invention relates to a kind of soft magnetic powder metallurgical material and its manufacture method.A kind of soft magnetic powder metallurgical material, include the component of following parts by weight：Parts by weight of iron powder 10 30 that the parts by weight of di-iron trioxide 10 30, the parts by weight of haloflex 3 12, the parts by weight of Zinc oxide particles 10 20, phosphorating treatment are crossed, the parts by weight of carbonyl iron dust 8 15, the parts by weight of organic siliconresin 25, the parts by weight of deionized water 20 50.Soft magnetic powder metallurgical material of the present invention and its manufacture method, have the advantages that manufacture method is simple, increases density of material.Inventor has carried out the screening experiment of substantial amounts of component and dosage early stage, is found surprisingly that, technical scheme by reasonably match and each component combination tool be significantly reduced soft magnetic powder metallurgical material power attenuation effect.Compactness, planarization and the insulating properties of base substrate are enhanced, reduces loss, cost is low, easy to utilize.
Description
Technical field
The invention belongs to soft magnetic materials manufacturing technology field, more particularly to a kind of soft magnetic powder metallurgical material and its manufacturer
Method.
Background technology
Soft magnetic ferrite is a kind of material with high magnetic permeability, high resistivity and low loss characteristic, thus transformer,
It is used widely in the fields such as inductor, Switching Power Supply, communication apparatus, wave filter, computer electron rectifier.As information is produced
The fast development of industry technology and the continuous renewal of electronic equipment manufacturing technology and perfect, magnetic core component market is opened high-performance
The demand of powered-down source high-frequency and low-consumption material will be increasing.Loss of the soft magnetic ferrite under alternating field substantially can be with
It is divided into three kinds：Magnetic hystersis loss, eddy-current loss and residual loss etc., soft magnetic ferrite in the fabrication process, mix by generally use
It is miscellaneous to improve the frequency characteristic of material, to reduce its electrical conductivity and eddy-current loss, and it is allowed to form suitable microstructure.Because of it
Required material purity requires high during production, and using spray roasting production technology in the preparation of powder, but it sets
Standby investment is big, production cost is high, large-scale production is difficult to realize at home, in order to solve domestic market to soft magnetic ferrite
Demand, a kind of preparation technology is simple, cost is low there is an urgent need to working out, the method for cost-effective soft magnetic ferrite.
The content of the invention
The technical problems to be solved by the invention are in view of the shortcomings of the prior art, there is provided a kind of soft magnetic powder metallurgical material
And its manufacture method, to solve at least one of above-mentioned technical problem.
The technical scheme that the present invention solves above-mentioned technical problem is as follows：A kind of soft magnetic powder metallurgical material, including it is following heavy
Measure the component of part：Di-iron trioxide 10-30 parts by weight, haloflex 3-12 parts by weight, Zinc oxide particles 10-20 parts by weight,
Iron powder 10-30 parts by weight that phosphorating treatment is crossed, carbonyl iron dust 8-15 parts by weight, organic siliconresin 2-5 parts by weight, deionized water
20-50 parts by weight.
The beneficial effects of the invention are as follows：Soft magnetic powder metallurgical material of the present invention and its manufacture method, there is manufacturer
The advantages that method is simple, increase density of material.Inventor has carried out the screening experiment of substantial amounts of component and dosage early stage, unexpectedly
It was found that technical scheme by reasonably match and the combination of each component tool be significantly reduced soft magnetic powder metallurgy
The effect of the power attenuation of material.Compactness, planarization and the insulating properties of base substrate are enhanced, reduces loss, cost is low, is easy to
Popularization and application.
On the basis of above-mentioned technical proposal, the present invention can also do following improvement.
Further, the component of following parts by weight is included：The parts by weight of di-iron trioxide 14, the parts by weight of haloflex 8, oxidation
Parts by weight of iron powder 25 that the parts by weight of zinc particle 12, phosphorating treatment are crossed, the parts by weight of carbonyl iron dust 10, the parts by weight of organic siliconresin 2, go
The parts by weight of ionized water 20.
Further, the iron powder phosphorus content that the phosphorating treatment is crossed is 20%-25%.
The present invention also provides a kind of manufacture method of above-mentioned soft magnetic powder metallurgical material, comprises the following steps：
Step 1, material is prepared by mass percentage first, by di-iron trioxide 10-30 parts by weight, haloflex 3-12
Iron powder 10-30 parts by weight that parts by weight, phosphorating treatment are crossed, organic siliconresin 2-5 parts by weight, deionized water 20-50 parts by weight are wet
Method ball milling mixing is uniform；
Step 2, the powder after ball milling in step 1 is added in sintering furnace and be sintered；
Step 3, Zinc oxide particles 10-20 parts by weight and carbonyl iron dust 8-15 parts by weight are added, and carry out second step ball
Mill, particle size range is at 1.5 μm -3.5 μm；
Step 4, the material in step 3 is added in mould, using heat pressing forming machines, is pressed into solid shape.
On the basis of above-mentioned technical proposal, the present invention can also do following improvement.
Further, the Ball-milling Time in the step 1 is 4-6 hours.
Further, the sintering temperature in the step 2 is 800-1000 DEG C.
Further, the sintering time in the step 2 is 2-3 hours.
Embodiment
The principles and features of the present invention are described below, and the given examples are served only to explain the present invention, is not intended to limit
Determine the scope of the present invention.
A kind of soft magnetic powder metallurgical material, include the component of following parts by weight：Di-iron trioxide 10-30 parts by weight, chlorination
Iron powder 10-30 parts by weight that polyethylene 3-12 parts by weight, Zinc oxide particles 10-20 parts by weight, phosphorating treatment are crossed, carbonyl iron dust 8-
15 parts by weight, organic siliconresin 2-5 parts by weight, deionized water 20-50 parts by weight.The iron powder phosphorus content that the phosphorating treatment is crossed is
20%-25%.During manufacture, comprise the following steps：Step 1, material is prepared by mass percentage first, by di-iron trioxide 10-
Iron powder 10-30 parts by weight that 30 parts by weight, haloflex 3-12 parts by weight, phosphorating treatment are crossed, organic siliconresin 2-5 weight
Part, deionized water 20-50 parts by weight wet ball grindings are well mixed；Step 2, the powder after ball milling in step 1 is added to sintering
It is sintered in stove；Step 3, Zinc oxide particles 10-20 parts by weight and carbonyl iron dust 8-15 parts by weight are added, and carry out second
Ball milling is walked, particle size range is at 1.5 μm -3.5 μm；Step 4, the material in step 3 is added in mould, use is hot-forming
Machine, it is pressed into solid shape.Ball-milling Time in the step 1 is 4-6 hours.Sintering temperature in the step 2 is 800-
1000℃.Sintering time in the step 2 is 2-3 hours.
Relative to prior art, soft magnetism composite material of the present invention and its manufacture method, have manufacture method it is simple,
The advantages that increasing density of material.Inventor has carried out the screening experiment of substantial amounts of component and dosage early stage, is found surprisingly that, this
The technical scheme of invention by reasonably match and each component combination tool be significantly reduced soft magnetic powder metallurgical material
The effect of power attenuation.Compactness, planarization and the insulating properties of base substrate are enhanced, reduces loss, cost is low, is easy to promote and answers
With.
It is introduced below by specific embodiment.
Embodiment 1
A kind of soft magnetic powder metallurgical material, including following components by weight percent：Di-iron trioxide 1.5kg, haloflex
Iron powder 2.0kg that 0.6kg, Zinc oxide particles 1kg, phosphorating treatment are crossed, carbonyl iron dust 1.2kg, organic siliconresin 0.2kg, go from
Sub- water 2kg.During manufacture, each component is weighed by proportioning, is mixed together, ball milling 4 hours, burnt in sintering furnace with 800 DEG C of temperature
Knot 2 hours, after drying, is added in mould, compressing.Soft magnetic bodies composite material is made.
Embodiment 2
A kind of soft magnetic powder metallurgical material, including following components by weight percent：Di-iron trioxide 1.4kg, haloflex
Iron powder 2.1kg that 0.7kg, Zinc oxide particles 1.2kg, phosphorating treatment are crossed, carbonyl iron dust 1.0kg, organic siliconresin 0.2kg, go
Ionized water 2.1kg.During manufacture, each component is weighed by proportioning, is mixed together, ball milling 4 hours, with 800 DEG C of temperature in sintering furnace
Degree sintering 2 hours, after drying, is added in mould, compressing.Soft magnetic bodies composite material is made.
Embodiment 3
A kind of soft magnetic powder metallurgical material, including following components by weight percent：Di-iron trioxide 1.6kg, haloflex
Iron powder 1.8kg that 1.0kg, Zinc oxide particles 1kg, phosphorating treatment are crossed, carbonyl iron dust 0.8kg, organic siliconresin 0.2kg, go from
Sub- water 2kg.During manufacture, each component is weighed by proportioning, is mixed together, ball milling 4 hours, burnt in sintering furnace with 800 DEG C of temperature
Knot 2 hours, after drying, is added in mould, compressing.Soft magnetic bodies composite material is made.
Comparative example 1
The di-iron trioxide 3kg, carbonyl iron dust 0.1kg, remaining is same as Example 1.
Comparative example 2
The di-iron trioxide 0.1kg, haloflex 5kg, remaining is same as Example 1.
Comparative example 3
The di-iron trioxide 3kg, haloflex 5kg, remaining is same as Example 1.
Comparative example 4
The di-iron trioxide 0.1kg, haloflex 0.1kg, remaining is same as Example 1.
Measure of merit
By embodiment 1-3 and comparative example 1-4,7 groups of soft magnetic bodies composite materials are fabricated to using identical technique.Every group
The soft magnetic bodies composite material for randomly selecting out 0.5kg is tested.Its probability is tested to be lost, test condition 100Kc,
200mT, 100 ± 2 DEG C.
Test result is as shown in table 1.
Table 1
| Power attenuation (KW/m3) | |
| Embodiment 1 | 255.1 |
| Embodiment 2 | 262.9 |
| Embodiment 3 | 244.5 |
| Comparative example 1 | 289.3 |
| Comparative example 2 | 301.8 |
| Comparative example 3 | 328.6 |
| Comparative example 4 | 311.5 |
Data in table 1, which can be seen that technical scheme, can reduce the work(of soft magnetic powder metallurgical material
Rate is lost.
The foregoing is only presently preferred embodiments of the present invention, be not intended to limit the invention, it is all the present invention spirit and
Within principle, any modification, equivalent substitution and improvements made etc., it should be included in the scope of the protection.
Claims (7)
1. a kind of soft magnetic powder metallurgical material, it is characterised in that include the component of following parts by weight：Di-iron trioxide 10-30 weights
Iron powder 10-30 parts by weight that amount part, haloflex 3-12 parts by weight, Zinc oxide particles 10-20 parts by weight, phosphorating treatment are crossed,
Carbonyl iron dust 8-15 parts by weight, organic siliconresin 2-5 parts by weight, deionized water 20-50 parts by weight.
2. a kind of soft magnetic powder metallurgical material according to claim 1, it is characterised in that include the component of following parts by weight：
The weight of iron powder 25 that the parts by weight of di-iron trioxide 14, the parts by weight of haloflex 8, the parts by weight of Zinc oxide particles 12, phosphorating treatment are crossed
Measure part, the parts by weight of carbonyl iron dust 10, the parts by weight of organic siliconresin 2, the parts by weight of deionized water 20.
3. a kind of soft magnetic powder metallurgical material according to claim 1, it is characterised in that the iron powder that the phosphorating treatment is crossed contains
Phosphorus amount is 20%-25%.
A kind of 4. manufacture method of the soft magnetic powder metallurgical material as described in claim any one of 1-3, it is characterised in that including with
Lower step：
Step 1, material is prepared by mass percentage first, by di-iron trioxide 10-30 parts by weight, haloflex 3-12 weight
Part, phosphorating treatment cross iron powder 10-30 parts by weight, organic siliconresin 2-5 parts by weight, deionized water 20-50 parts by weight wet method balls
Mill is well mixed；
Step 2, the powder after ball milling in step 1 is added in sintering furnace and be sintered；
Step 3, Zinc oxide particles 10-20 parts by weight and carbonyl iron dust 8-15 parts by weight are added, and carry out second step ball milling, grain
Footpath scope is at 1.5 μm -3.5 μm；
Step 4, the material in step 3 is added in mould, using heat pressing forming machines, is pressed into solid shape.
5. a kind of manufacture method of soft magnetic powder metallurgical material according to claim 4, it is characterised in that in the step 1
Ball-milling Time be 4-6 hours.
6. a kind of manufacture method of soft magnetic powder metallurgical material according to claim 4, it is characterised in that in the step 2
Sintering temperature be 800-1000 DEG C.
7. a kind of manufacture method of soft magnetic powder metallurgical material according to claim 6, it is characterised in that in the step 2
Sintering time be 2-3 hours.
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| CN201711053094.9A CN107818856A (en) | 2017-10-31 | 2017-10-31 | A kind of soft magnetic powder metallurgical material and its manufacture method |
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| CN201711053094.9A CN107818856A (en) | 2017-10-31 | 2017-10-31 | A kind of soft magnetic powder metallurgical material and its manufacture method |
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Family
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Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1656575A (en) * | 2002-06-06 | 2005-08-17 | 罗伯特·博施有限公司 | Soft magnetic powder composite material, method for the production thereof and use of the same |
| CN104328344A (en) * | 2014-10-23 | 2015-02-04 | 苏州莱特复合材料有限公司 | Iron-based rust-proof powder metallurgy material and preparation method thereof |
| CN104891976A (en) * | 2015-04-24 | 2015-09-09 | 马鞍山科信咨询有限公司 | Low-loss nickel-zinc ferrite material and preparation method |
| CN104891977A (en) * | 2015-04-24 | 2015-09-09 | 马鞍山科信咨询有限公司 | High frequency fine grain soft magnetic ferrite magnet material and preparation method thereof |
| CN104891978A (en) * | 2015-04-24 | 2015-09-09 | 马鞍山科信咨询有限公司 | Burr-free and smooth-surface nickel-zinc soft magnetic ferrite material and preparation method thereof |
-
2017
- 2017-10-31 CN CN201711053094.9A patent/CN107818856A/en active Pending
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1656575A (en) * | 2002-06-06 | 2005-08-17 | 罗伯特·博施有限公司 | Soft magnetic powder composite material, method for the production thereof and use of the same |
| CN104328344A (en) * | 2014-10-23 | 2015-02-04 | 苏州莱特复合材料有限公司 | Iron-based rust-proof powder metallurgy material and preparation method thereof |
| CN104891976A (en) * | 2015-04-24 | 2015-09-09 | 马鞍山科信咨询有限公司 | Low-loss nickel-zinc ferrite material and preparation method |
| CN104891977A (en) * | 2015-04-24 | 2015-09-09 | 马鞍山科信咨询有限公司 | High frequency fine grain soft magnetic ferrite magnet material and preparation method thereof |
| CN104891978A (en) * | 2015-04-24 | 2015-09-09 | 马鞍山科信咨询有限公司 | Burr-free and smooth-surface nickel-zinc soft magnetic ferrite material and preparation method thereof |
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Application publication date: 20180320 |
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