CN112837919A - Antirust alloy magnetic core and preparation method and application thereof - Google Patents
Antirust alloy magnetic core and preparation method and application thereof Download PDFInfo
- Publication number
- CN112837919A CN112837919A CN202011613565.9A CN202011613565A CN112837919A CN 112837919 A CN112837919 A CN 112837919A CN 202011613565 A CN202011613565 A CN 202011613565A CN 112837919 A CN112837919 A CN 112837919A
- Authority
- CN
- China
- Prior art keywords
- magnetic core
- alloy magnetic
- alloy
- parylene
- electroplating
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
Links
- 239000000956 alloy Substances 0.000 title claims abstract description 151
- 229910045601 alloy Inorganic materials 0.000 title claims abstract description 150
- 238000002360 preparation method Methods 0.000 title claims abstract description 35
- 229920000052 poly(p-xylylene) Polymers 0.000 claims abstract description 80
- 239000000843 powder Substances 0.000 claims abstract description 77
- 238000009713 electroplating Methods 0.000 claims abstract description 48
- 238000010147 laser engraving Methods 0.000 claims abstract description 22
- 229910001004 magnetic alloy Inorganic materials 0.000 claims abstract description 22
- 238000005520 cutting process Methods 0.000 claims abstract description 13
- 238000000465 moulding Methods 0.000 claims abstract description 12
- 238000003825 pressing Methods 0.000 claims abstract description 11
- 238000007747 plating Methods 0.000 claims description 166
- PXHVJJICTQNCMI-UHFFFAOYSA-N Nickel Chemical compound [Ni] PXHVJJICTQNCMI-UHFFFAOYSA-N 0.000 claims description 108
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 53
- 229910052759 nickel Inorganic materials 0.000 claims description 52
- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 claims description 47
- 229910052802 copper Inorganic materials 0.000 claims description 47
- 239000010949 copper Substances 0.000 claims description 47
- ATJFFYVFTNAWJD-UHFFFAOYSA-N Tin Chemical compound [Sn] ATJFFYVFTNAWJD-UHFFFAOYSA-N 0.000 claims description 35
- 238000001035 drying Methods 0.000 claims description 33
- 238000005406 washing Methods 0.000 claims description 30
- 239000008367 deionised water Substances 0.000 claims description 28
- 229910021641 deionized water Inorganic materials 0.000 claims description 28
- 238000000034 method Methods 0.000 claims description 25
- 238000000151 deposition Methods 0.000 claims description 24
- 238000005229 chemical vapour deposition Methods 0.000 claims description 22
- 238000006386 neutralization reaction Methods 0.000 claims description 22
- 238000010438 heat treatment Methods 0.000 claims description 20
- 230000008021 deposition Effects 0.000 claims description 15
- 238000004519 manufacturing process Methods 0.000 claims description 14
- 238000005336 cracking Methods 0.000 claims description 12
- 238000000748 compression moulding Methods 0.000 claims description 6
- 239000007788 liquid Substances 0.000 claims description 6
- 238000007873 sieving Methods 0.000 claims description 6
- 239000003513 alkali Substances 0.000 claims description 4
- 239000011248 coating agent Substances 0.000 claims description 4
- 238000000576 coating method Methods 0.000 claims description 4
- VRBFTYUMFJWSJY-UHFFFAOYSA-N 28804-46-8 Chemical compound ClC1CC(C=C2)=CC=C2C(Cl)CC2=CC=C1C=C2 VRBFTYUMFJWSJY-UHFFFAOYSA-N 0.000 claims 1
- 239000000696 magnetic material Substances 0.000 abstract description 10
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 description 50
- XEKOWRVHYACXOJ-UHFFFAOYSA-N Ethyl acetate Chemical compound CCOC(C)=O XEKOWRVHYACXOJ-UHFFFAOYSA-N 0.000 description 48
- 229920005989 resin Polymers 0.000 description 20
- 239000011347 resin Substances 0.000 description 20
- HEMHJVSKTPXQMS-UHFFFAOYSA-M Sodium hydroxide Chemical compound [OH-].[Na+] HEMHJVSKTPXQMS-UHFFFAOYSA-M 0.000 description 17
- 229910052742 iron Inorganic materials 0.000 description 15
- LFQSCWFLJHTTHZ-UHFFFAOYSA-N Ethanol Chemical compound CCO LFQSCWFLJHTTHZ-UHFFFAOYSA-N 0.000 description 13
- 229910005347 FeSi Inorganic materials 0.000 description 13
- JEIPFZHSYJVQDO-UHFFFAOYSA-N iron(III) oxide Inorganic materials O=[Fe]O[Fe]=O JEIPFZHSYJVQDO-UHFFFAOYSA-N 0.000 description 13
- 229920001296 polysiloxane Polymers 0.000 description 13
- 238000003756 stirring Methods 0.000 description 13
- CSCPPACGZOOCGX-UHFFFAOYSA-N Acetone Chemical compound CC(C)=O CSCPPACGZOOCGX-UHFFFAOYSA-N 0.000 description 12
- 239000011324 bead Substances 0.000 description 12
- 229910052751 metal Inorganic materials 0.000 description 12
- 239000002184 metal Substances 0.000 description 12
- -1 or fesai Inorganic materials 0.000 description 12
- 239000002904 solvent Substances 0.000 description 12
- CDBYLPFSWZWCQE-UHFFFAOYSA-L Sodium Carbonate Chemical compound [Na+].[Na+].[O-]C([O-])=O CDBYLPFSWZWCQE-UHFFFAOYSA-L 0.000 description 10
- UIIMBOGNXHQVGW-UHFFFAOYSA-M Sodium bicarbonate Chemical compound [Na+].OC([O-])=O UIIMBOGNXHQVGW-UHFFFAOYSA-M 0.000 description 10
- 230000008569 process Effects 0.000 description 10
- 239000010405 anode material Substances 0.000 description 9
- 229920002037 poly(vinyl butyral) polymer Polymers 0.000 description 9
- 239000002131 composite material Substances 0.000 description 8
- 239000000178 monomer Substances 0.000 description 8
- 239000002002 slurry Substances 0.000 description 7
- XKRFYHLGVUSROY-UHFFFAOYSA-N Argon Chemical compound [Ar] XKRFYHLGVUSROY-UHFFFAOYSA-N 0.000 description 6
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N Silicium dioxide Chemical compound O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 description 6
- FAPWRFPIFSIZLT-UHFFFAOYSA-M Sodium chloride Chemical compound [Na+].[Cl-] FAPWRFPIFSIZLT-UHFFFAOYSA-M 0.000 description 6
- 239000011230 binding agent Substances 0.000 description 6
- 230000018044 dehydration Effects 0.000 description 6
- 238000006297 dehydration reaction Methods 0.000 description 6
- 239000002245 particle Substances 0.000 description 6
- 239000011780 sodium chloride Substances 0.000 description 6
- 238000006243 chemical reaction Methods 0.000 description 5
- 239000000203 mixture Substances 0.000 description 5
- 230000003472 neutralizing effect Effects 0.000 description 5
- 235000017557 sodium bicarbonate Nutrition 0.000 description 5
- 229910000030 sodium bicarbonate Inorganic materials 0.000 description 5
- 229910000029 sodium carbonate Inorganic materials 0.000 description 5
- 229910021592 Copper(II) chloride Inorganic materials 0.000 description 4
- 229910021586 Nickel(II) chloride Inorganic materials 0.000 description 4
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 description 4
- 229910052927 chalcanthite Inorganic materials 0.000 description 4
- 238000005536 corrosion prevention Methods 0.000 description 4
- 238000002955 isolation Methods 0.000 description 4
- 239000000463 material Substances 0.000 description 4
- 238000002156 mixing Methods 0.000 description 4
- 239000001301 oxygen Substances 0.000 description 4
- 229910052760 oxygen Inorganic materials 0.000 description 4
- 230000002265 prevention Effects 0.000 description 4
- 229910002027 silica gel Inorganic materials 0.000 description 4
- 239000000741 silica gel Substances 0.000 description 4
- 229910000375 tin(II) sulfate Inorganic materials 0.000 description 4
- 230000007704 transition Effects 0.000 description 4
- 238000001771 vacuum deposition Methods 0.000 description 4
- BQCADISMDOOEFD-UHFFFAOYSA-N Silver Chemical compound [Ag] BQCADISMDOOEFD-UHFFFAOYSA-N 0.000 description 3
- 229910052786 argon Inorganic materials 0.000 description 3
- 230000000052 comparative effect Effects 0.000 description 3
- 230000035699 permeability Effects 0.000 description 3
- 239000012256 powdered iron Substances 0.000 description 3
- 229910052709 silver Inorganic materials 0.000 description 3
- 239000004332 silver Substances 0.000 description 3
- 238000002791 soaking Methods 0.000 description 3
- 229910000859 α-Fe Inorganic materials 0.000 description 3
- UQSXHKLRYXJYBZ-UHFFFAOYSA-N Iron oxide Chemical compound [Fe]=O UQSXHKLRYXJYBZ-UHFFFAOYSA-N 0.000 description 2
- NBIIXXVUZAFLBC-UHFFFAOYSA-N Phosphoric acid Chemical compound OP(O)(O)=O NBIIXXVUZAFLBC-UHFFFAOYSA-N 0.000 description 2
- 238000001354 calcination Methods 0.000 description 2
- 238000005266 casting Methods 0.000 description 2
- 238000004140 cleaning Methods 0.000 description 2
- 238000010586 diagram Methods 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 239000001307 helium Substances 0.000 description 2
- 229910052734 helium Inorganic materials 0.000 description 2
- SWQJXJOGLNCZEY-UHFFFAOYSA-N helium atom Chemical compound [He] SWQJXJOGLNCZEY-UHFFFAOYSA-N 0.000 description 2
- 239000011261 inert gas Substances 0.000 description 2
- 238000009413 insulation Methods 0.000 description 2
- 230000003647 oxidation Effects 0.000 description 2
- 238000007254 oxidation reaction Methods 0.000 description 2
- 238000005240 physical vapour deposition Methods 0.000 description 2
- VYZAMTAEIAYCRO-UHFFFAOYSA-N Chromium Chemical compound [Cr] VYZAMTAEIAYCRO-UHFFFAOYSA-N 0.000 description 1
- WGLPBDUCMAPZCE-UHFFFAOYSA-N Trioxochromium Chemical compound O=[Cr](=O)=O WGLPBDUCMAPZCE-UHFFFAOYSA-N 0.000 description 1
- HCHKCACWOHOZIP-UHFFFAOYSA-N Zinc Chemical compound [Zn] HCHKCACWOHOZIP-UHFFFAOYSA-N 0.000 description 1
- 230000009471 action Effects 0.000 description 1
- 229910000147 aluminium phosphate Inorganic materials 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 239000011651 chromium Substances 0.000 description 1
- 229910052804 chromium Inorganic materials 0.000 description 1
- 229910000423 chromium oxide Inorganic materials 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 238000007580 dry-mixing Methods 0.000 description 1
- 238000004146 energy storage Methods 0.000 description 1
- 239000007789 gas Substances 0.000 description 1
- 238000007654 immersion Methods 0.000 description 1
- 239000012535 impurity Substances 0.000 description 1
- 230000007774 longterm Effects 0.000 description 1
- 239000000395 magnesium oxide Substances 0.000 description 1
- CPLXHLVBOLITMK-UHFFFAOYSA-N magnesium oxide Inorganic materials [Mg]=O CPLXHLVBOLITMK-UHFFFAOYSA-N 0.000 description 1
- AXZKOIWUVFPNLO-UHFFFAOYSA-N magnesium;oxygen(2-) Chemical compound [O-2].[Mg+2] AXZKOIWUVFPNLO-UHFFFAOYSA-N 0.000 description 1
- 238000002844 melting Methods 0.000 description 1
- 230000008018 melting Effects 0.000 description 1
- 238000005058 metal casting Methods 0.000 description 1
- 239000002923 metal particle Substances 0.000 description 1
- 238000001465 metallisation Methods 0.000 description 1
- 238000007639 printing Methods 0.000 description 1
- 238000004080 punching Methods 0.000 description 1
- 239000002994 raw material Substances 0.000 description 1
- 150000003839 salts Chemical class 0.000 description 1
- 238000007789 sealing Methods 0.000 description 1
- 229910052814 silicon oxide Inorganic materials 0.000 description 1
- 229920002050 silicone resin Polymers 0.000 description 1
- 238000005245 sintering Methods 0.000 description 1
- 229910000679 solder Inorganic materials 0.000 description 1
- 238000005476 soldering Methods 0.000 description 1
- 238000004544 sputter deposition Methods 0.000 description 1
- 239000000126 substance Substances 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
- 238000010345 tape casting Methods 0.000 description 1
- 229910052725 zinc Inorganic materials 0.000 description 1
- 239000011701 zinc Substances 0.000 description 1
Images
Classifications
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01F—MAGNETS; INDUCTANCES; TRANSFORMERS; SELECTION OF MATERIALS FOR THEIR MAGNETIC PROPERTIES
- H01F7/00—Magnets
- H01F7/02—Permanent magnets [PM]
-
- C—CHEMISTRY; METALLURGY
- C23—COATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; CHEMICAL SURFACE TREATMENT; DIFFUSION TREATMENT OF METALLIC MATERIAL; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL; INHIBITING CORROSION OF METALLIC MATERIAL OR INCRUSTATION IN GENERAL
- C23C—COATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; SURFACE TREATMENT OF METALLIC MATERIAL BY DIFFUSION INTO THE SURFACE, BY CHEMICAL CONVERSION OR SUBSTITUTION; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL
- C23C16/00—Chemical coating by decomposition of gaseous compounds, without leaving reaction products of surface material in the coating, i.e. chemical vapour deposition [CVD] processes
- C23C16/44—Chemical coating by decomposition of gaseous compounds, without leaving reaction products of surface material in the coating, i.e. chemical vapour deposition [CVD] processes characterised by the method of coating
-
- C—CHEMISTRY; METALLURGY
- C25—ELECTROLYTIC OR ELECTROPHORETIC PROCESSES; APPARATUS THEREFOR
- C25D—PROCESSES FOR THE ELECTROLYTIC OR ELECTROPHORETIC PRODUCTION OF COATINGS; ELECTROFORMING; APPARATUS THEREFOR
- C25D3/00—Electroplating: Baths therefor
- C25D3/02—Electroplating: Baths therefor from solutions
- C25D3/12—Electroplating: Baths therefor from solutions of nickel or cobalt
-
- C—CHEMISTRY; METALLURGY
- C25—ELECTROLYTIC OR ELECTROPHORETIC PROCESSES; APPARATUS THEREFOR
- C25D—PROCESSES FOR THE ELECTROLYTIC OR ELECTROPHORETIC PRODUCTION OF COATINGS; ELECTROFORMING; APPARATUS THEREFOR
- C25D3/00—Electroplating: Baths therefor
- C25D3/02—Electroplating: Baths therefor from solutions
- C25D3/30—Electroplating: Baths therefor from solutions of tin
-
- C—CHEMISTRY; METALLURGY
- C25—ELECTROLYTIC OR ELECTROPHORETIC PROCESSES; APPARATUS THEREFOR
- C25D—PROCESSES FOR THE ELECTROLYTIC OR ELECTROPHORETIC PRODUCTION OF COATINGS; ELECTROFORMING; APPARATUS THEREFOR
- C25D3/00—Electroplating: Baths therefor
- C25D3/02—Electroplating: Baths therefor from solutions
- C25D3/38—Electroplating: Baths therefor from solutions of copper
-
- C—CHEMISTRY; METALLURGY
- C25—ELECTROLYTIC OR ELECTROPHORETIC PROCESSES; APPARATUS THEREFOR
- C25D—PROCESSES FOR THE ELECTROLYTIC OR ELECTROPHORETIC PRODUCTION OF COATINGS; ELECTROFORMING; APPARATUS THEREFOR
- C25D5/00—Electroplating characterised by the process; Pretreatment or after-treatment of workpieces
- C25D5/10—Electroplating with more than one layer of the same or of different metals
- C25D5/12—Electroplating with more than one layer of the same or of different metals at least one layer being of nickel or chromium
-
- C—CHEMISTRY; METALLURGY
- C25—ELECTROLYTIC OR ELECTROPHORETIC PROCESSES; APPARATUS THEREFOR
- C25D—PROCESSES FOR THE ELECTROLYTIC OR ELECTROPHORETIC PRODUCTION OF COATINGS; ELECTROFORMING; APPARATUS THEREFOR
- C25D5/00—Electroplating characterised by the process; Pretreatment or after-treatment of workpieces
- C25D5/48—After-treatment of electroplated surfaces
-
- C—CHEMISTRY; METALLURGY
- C25—ELECTROLYTIC OR ELECTROPHORETIC PROCESSES; APPARATUS THEREFOR
- C25D—PROCESSES FOR THE ELECTROLYTIC OR ELECTROPHORETIC PRODUCTION OF COATINGS; ELECTROFORMING; APPARATUS THEREFOR
- C25D7/00—Electroplating characterised by the article coated
- C25D7/001—Magnets
-
- 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
Landscapes
- Chemical & Material Sciences (AREA)
- Engineering & Computer Science (AREA)
- Organic Chemistry (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Materials Engineering (AREA)
- Metallurgy (AREA)
- Electrochemistry (AREA)
- Power Engineering (AREA)
- General Chemical & Material Sciences (AREA)
- Mechanical Engineering (AREA)
- Physics & Mathematics (AREA)
- Electromagnetism (AREA)
- Manufacturing & Machinery (AREA)
- Soft Magnetic Materials (AREA)
Abstract
The invention provides an antirust alloy magnetic core and a preparation method and application thereof, wherein the preparation method comprises the following steps: (1) pressing and molding the soft magnetic alloy powder, cutting and roasting to obtain a first alloy magnetic core; (2) arranging at least 1 parylene film layer on the surface of the first alloy magnetic core to obtain a second alloy magnetic core; (3) defining at least 2 electroplating areas on the surface of the second alloy magnetic core, and performing laser engraving in the electroplating areas to obtain a third alloy magnetic core; (4) and electroplating treatment is carried out in the electroplating area of the third alloy magnetic core to obtain the antirust alloy magnetic core. The preparation method provided by the invention is particularly suitable for preparing small-size alloy magnetic cores, improves the antirust performance of the alloy magnetic cores, and widens the selection range of alloy magnetic materials.
Description
Technical Field
The invention belongs to the technical field of electronic components, relates to an alloy magnetic core, and particularly relates to an antirust alloy magnetic core and a preparation method and application thereof.
Background
The alloy soft magnetic material is widely used for manufacturing an energy storage inductance magnetic core of a DC-DC circuit in recent years due to the excellent DC-Bias characteristic, and the development requirement of miniaturization and high power of an inductance element is met. However, the alloy soft magnetic material is basically an iron-based alloy material, and is liable to rust in a humid environment, thereby affecting the reliability of the magnetic core. Although the magnetic core can be made to withstand a general use environment by the coating and coating treatment, the effect of being rustless by long-term water immersion cannot be achieved. At present, the electrode metallization process of the alloy magnetic core usually adopts a PVD (vacuum sputtering) or a mode of pasting a metal terminal, but for the magnetic core with a small size, an electrode surface of the PVD process is easy to diffuse to a place where an electrode is not needed, so that the insulation characteristic of a product is influenced, and the defect rate and the production cost are increased.
CN 109754973A discloses an antirust nanocrystalline alloy and a preparation method thereof, and the preparation method obtains a nanocrystalline alloy product with excellent antirust performance and soft magnetic performance by optimizing the element components and the proportion of the alloy and improving the heat treatment mode. However, the specific composition of the anti-rust nanocrystalline alloy limits its application range and raises the raw material cost.
CN 105895301A discloses an iron powder core inductor and a preparation method thereof, wherein the preparation method comprises the steps of uniformly dissolving simple substance powder of iron, chromium and zinc metal in a specific ratio in acetone, adding phosphoric acid for surface insulation treatment, drying the solution to obtain insulating alloy powder, adding iron oxide, magnesium oxide and chromium oxide into the insulating alloy powder, performing dry mixing to obtain composite inorganic powder, preparing the composite inorganic powder into composite slurry, printing an internal circuit by wet tape casting and copper slurry to obtain a formed block, and finally performing drying, cutting, binder removal, sintering, chamfering, copper slurry end sealing, end burning and electroplating processes on the block to obtain the iron powder core inductor. Although the iron powder core inductor has high temperature resistance, low loss and higher magnetic conductivity, the rust-proof and corrosion-proof performance is not obvious, and the application range of the iron powder core inductor is limited by the composition of specific powder.
CN 104392834a discloses a method for manufacturing a powdered iron core blank and a method for manufacturing a powdered iron core, the method for manufacturing the powdered iron core blank comprises the following steps: (1) preparing ferrite slurry and metal powder slurry; (2) respectively casting the ferrite slurry and the metal powder slurry into films with the thickness of 25-50 mu m; (3) stacking the ferrite casting film and the metal casting film together to form a composite film; (4) cutting the composite material film subjected to prepressing and punching treatment; (5) carrying out re-pressing and stamping on the rough blank; (6) and cutting the rough blank to obtain a cylindrical part of the blank. The iron powder core product prepared by the method has good insulating property and antirust property, but the process is complex, the production cost is increased, and the method is not suitable for preparing small-size iron powder core products.
Therefore, how to provide the alloy magnetic core and the preparation method thereof, which are particularly suitable for small-size (the average diameter is less than or equal to 8mm) alloy magnetic cores, can improve the antirust performance of the alloy magnetic cores and widen the selection range of alloy magnetic materials, and becomes a problem which needs to be solved by technical personnel in the field at present.
Disclosure of Invention
The invention aims to provide an antirust alloy magnetic core and a preparation method and application thereof.
In order to achieve the purpose, the invention adopts the following technical scheme:
in a first aspect, the present invention provides a method for producing a rust-proof alloy magnetic core, comprising the steps of:
(1) pressing and molding the soft magnetic alloy powder, cutting and roasting to obtain a first alloy magnetic core;
(2) arranging at least 1 parylene film layer, such as 1, 2, 3, 4 or 5 layers, on the surface of the first alloy magnetic core to obtain a second alloy magnetic core;
(3) defining at least 2 electroplating areas, such as 2, 3, 4, 5 or 6, on the surface of the second alloy magnetic core, and performing laser engraving in the electroplating areas to obtain a third alloy magnetic core;
(4) and electroplating treatment is carried out in the electroplating area of the third alloy magnetic core to obtain the antirust alloy magnetic core.
In the invention, the parylene film layer in the step (2) has excellent compactness, permeability porosity, super-hydrophobicity and low friction coefficient, so that the alloy magnetic core has the characteristics of good water resistance, oxygen isolation, rust prevention, corrosion prevention and wear resistance, the selection range of the alloy magnetic material is further widened, and some materials which are easy to oxidize, such as FeSi and pure Fe powder, can also be applied to the magnetic core to be made into the composite magnetic material.
In the invention, the laser engraving in the step (3) accurately removes the film layer and the surface oxide layer in the electroplating area to expose metal, and an electroplating silver paste is not needed for transition, so that the cost is saved, the control precision is improved, and the laser engraving method is particularly suitable for preparing the small-size (the average diameter is less than or equal to 8mm) alloy magnetic core.
In the invention, the selection of the electroplating area is based on the actual production requirement, so the position and the size of the electroplating area are not specifically limited.
In the invention, the soft magnetic alloy powder in the step (1) can be soft magnetic alloy powder conventionally adopted in the field, and can also be soft magnetic alloy powder prepared according to the following steps:
(A) mixing iron-based powder, organic silica gel and a first solvent, drying and crushing to obtain intermediate powder;
(B) and mixing the intermediate powder, the binder and the second solvent, and drying to obtain the soft magnetic alloy powder.
Preferably, the iron-based powder of step (a) comprises any one or a combination of at least two of fesicrcr, fesai, FeSi or pure Fe powder, and typical but non-limiting combinations include fesicrcr and fesai, fesai and FeSi, FeSi and pure Fe powder, fesicar, fesai and FeSi, or fesai, FeSi and pure Fe powder.
Preferably, the particle size of the iron-based powder of step (A) is 5-10 μm, and may be, for example, 5 μm, 6 μm, 7 μm, 8 μm, 9 μm or 10 μm, but is not limited to the values listed, and other values not listed in this range are equally applicable.
Preferably, the silicone gum of step (a) comprises a silicone resin.
Preferably, the amount of the silicone gum in step (A) is 1-8% by mass of the iron-based powder, for example 1%, 2%, 3%, 4%, 5%, 6%, 7% or 8%, but not limited to the recited values, and other values not recited in this range are also applicable.
Preferably, the first solvent of step (a) comprises ethyl acetate and/or acetone.
Preferably, the first solvent in step (A) accounts for 20-40% of the mass of the iron-based powder, and may be, for example, 20%, 22%, 24%, 26%, 28%, 30%, 32%, 34%, 36%, 38% or 40%, but is not limited to the recited values, and other values not recited in the range of the values are also applicable.
Preferably, the mixing in step (a) is carried out in a specific manner: adding the iron-based powder, the organic silica gel and the first solvent into a reaction kettle, and stirring to fully disperse and dissolve the iron-based powder, the organic silica gel and the first solvent until the first solvent is completely volatilized.
Preferably, the drying temperature in step (A) is 160-180 ℃, such as 160 ℃, 162 ℃, 164 ℃, 166 ℃, 168 ℃, 170 ℃, 172 ℃, 174 ℃, 176 ℃, 178 ℃ or 180 ℃, but not limited to the recited values, and other non-recited values in the range of the values are also applicable.
Preferably, the drying time in step (A) is 30-60min, such as 30min, 35min, 40min, 45min, 50min, 55min or 60min, but not limited to the recited values, and other values not recited in the range of values are also applicable.
In the invention, the first solvent is completely removed by drying in the step (A), so that the organic silica gel forms a cured film on the surface of the iron-based powder.
Preferably, the comminuting of step (a) is performed in a crusher.
Preferably, the binder of step (B) comprises a polyvinyl butyral resin.
Preferably, the binder of step (B) accounts for 1-3% of the mass of the intermediate powder, and may be, for example, 1%, 1.2%, 1.4%, 1.6%, 1.8%, 2%, 2.2%, 2.4%, 2.6%, 2.8% or 3%, but is not limited to the recited values, and other values not recited in the range of the values are also applicable.
Preferably, the second solvent of step (B) comprises absolute ethanol.
Preferably, the second solvent in step (B) accounts for 20-30% of the mass of the intermediate powder, and may be, for example, 20%, 21%, 22%, 23%, 24%, 25%, 26%, 27%, 28%, 29% or 30%, but is not limited to the recited values, and other values not recited in the range of the recited values are also applicable.
Preferably, the mixing in step (B) is performed in a specific manner: the intermediate powder, the binder and the second solvent are added to a stirring tank and stirred to be sufficiently dispersed and dissolved until the second solvent is volatilized by 80 to 90 wt%, for example, 80 wt%, 81 wt%, 82 wt%, 83 wt%, 84 wt%, 85 wt%, 86 wt%, 87 wt%, 88 wt%, 89 wt% or 90 wt%, but not limited to the values listed, and other values not listed in the range of the values are also applicable.
Preferably, the drying temperature in step (B) is 60-75 deg.C, such as 60 deg.C, 61 deg.C, 63 deg.C, 65 deg.C, 67 deg.C, 69 deg.C, 70 deg.C, 71 deg.C, 73 deg.C or 75 deg.C, but not limited to the recited values, and other values not recited in the range of values are also applicable.
Preferably, the soft magnetic alloy powder in the step (1) is prepared by the following steps:
(A) adding iron-based powder with the particle size of 5-10 mu m, polysiloxane resin and ethyl acetate and/or acetone into a reaction kettle, stirring to fully disperse and dissolve the iron-based powder, the polysiloxane resin and the ethyl acetate and/or the acetone until the ethyl acetate and/or the acetone are completely volatilized, drying at 160-180 ℃ for 30-60min, and crushing in a crusher to obtain intermediate powder; the iron-based powder comprises one or the combination of at least two of FeSiCr, FeSiAl, FeSi or pure Fe powder, the polysiloxane resin accounts for 1-8% of the mass of the iron-based powder, the ethyl acetate and/or acetone accounts for 20-40% of the mass of the iron-based powder,
(B) adding the intermediate powder, polyvinyl butyral resin and absolute ethyl alcohol into a stirring tank for stirring, fully dispersing and dissolving until the absolute ethyl alcohol volatilizes 80-90 wt%, and drying at 60-75 ℃ to obtain soft magnetic alloy powder; the polyvinyl butyral resin accounts for 1-3% of the mass of the intermediate powder, and the absolute ethyl alcohol accounts for 20-30% of the mass of the intermediate powder.
Preferably, the soft magnetic alloy powder in step (1) has a sieve mesh size of 60-200 meshes, such as 60 meshes, 80 meshes, 100 meshes, 120 meshes, 140 meshes, 160 meshes, 180 meshes or 200 meshes, but not limited to the listed values, and other values in the range of the values are also applicable.
In the invention, the soft magnetic alloy powder with the sieving mesh number of 60-200 meshes has good fluidity and is convenient for subsequent molding and pressing.
Preferably, the pressure of the compression molding in the step (1) is 15-25T/cm2For example, it may be 15T/cm2、16T/cm2、17T/cm2、18T/cm2、19T/cm2、20T/cm2、21T/cm2、22T/cm2、23T/cm2、24T/cm2Or 25T/cm2However, the numerical values recited are not intended to be limiting, and other numerical values not recited within the numerical range may be equally applicable.
Preferably, the press-molding of step (1) has a press density of 6 to 7g/cm3For example, it may be 6g/cm3、6.1g/cm3、6.2g/cm3、6.3g/cm3、6.4g/cm3、6.5g/cm3、6.6g/cm3、6.7g/cm3、6.8g/cm3、6.9g/cm3Or 7g/cm3However, the numerical values recited are not intended to be limiting, and other numerical values not recited within the numerical range may be equally applicable.
In the invention, the compression molding in the step (1) is carried out on a molding machine.
In the invention, the cutting in the step (1) is carried out on a cutting machine.
Preferably, the temperature of the calcination in step (1) is 600-900 ℃, for example 600 ℃, 650 ℃, 700 ℃, 750 ℃, 800 ℃, 850 ℃ or 900 ℃, but is not limited to the recited values, and other values not recited in the range of the values are also applicable.
Preferably, the calcination time in step (1) is 4-12h, for example, 4h, 5h, 6h, 7h, 8h, 9h, 10h, 11h or 12h, but not limited to the recited values, and other values not recited in the range of the recited values are also applicable.
In the invention, the roasting in the step (1) is carried out in a roasting furnace, and the roasting atmosphere is air.
In the invention, the stress generated in the magnetic core during pressing is removed by baking in the step (1), so that the magnetic property of the product is improved; and the binder, moisture and other impurities in the magnetic core are discharged in a high-temperature environment, so that the density of the product is increased, and the organic silica gel is converted into a silicon oxide film layer in the roasting process, so that the insulativity among the soft magnetic alloy powder is improved. In addition, when the magnetic core is roasted in the air atmosphere, an oxide layer is generated on the surface of the metal particles, the binding force and the insulativity among the particles are enhanced, and the magnetic core product has the resistance characteristics of high strength and high insulativity.
Preferably, the parylene film layer of step (2) is disposed by coating and/or deposition, and further preferably by deposition.
Preferably, the deposition comprises chemical vapor deposition.
Preferably, the degree of absolute vacuum of the chemical vapor deposition is 2 to 3Pa, and may be, for example, 2Pa, 2.1Pa, 2.2Pa, 2.3Pa, 2.4Pa, 2.5Pa, 2.6Pa, 2.7Pa, 2.8Pa, 2.9Pa or 3Pa, but is not limited to the recited values, and other values not recited within the range of values are also applicable.
Preferably, the heating temperature of the chemical vapor deposition is 180-240 ℃, such as 180 ℃, 190 ℃, 200 ℃, 210 ℃, 220 ℃, 230 ℃ or 240 ℃, but is not limited to the recited values, and other values not recited in the range of values are also applicable.
Preferably, the cracking temperature of the chemical vapor deposition is 600-750 ℃, such as 600 ℃, 610 ℃, 630 ℃, 650 ℃, 670 ℃, 690 ℃, 700 ℃, 710 ℃, 730 ℃ or 750 ℃, but not limited to the recited values, and other values not recited in the range of values are also applicable.
Preferably, the deposition time of the chemical vapor deposition is 2-6h, for example, 2h, 2.5h, 3h, 3.5h, 4h, 4.5h, 5h, 5.5h or 6h, but is not limited to the recited values, and other values not recited in the range of the values are also applicable.
In the invention, the chemical vapor deposition is specifically as follows: placing the first alloy magnetic core into a roller in vacuum coating equipment, wherein the volume of the placed magnetic core is not more than 50% of the volume of the roller; locking various door covers of the equipment to be sealed, and opening the vacuum chemical vapor deposition procedure. Under the condition of absolute vacuum degree of 2-3Pa, the temperature of the parylene heating chamber is raised to 240 ℃ along with 180 ℃ to volatilize the parylene heating chamber, and inert gas is introduced to enter the cracking chamber along with the gas flow, the temperature of the cracking chamber is 600 ℃ along with 750 ℃ to crack the parylene heating chamber into the parylene monomer. And finally, allowing the parylene monomer to enter a roller at room temperature, depositing for 2-6h, and forming a parylene film layer on the surface of the first alloy magnetic core.
In the present invention, the inert gas includes helium and/or argon.
Preferably, the material of the parylene film layer in step (2) comprises any one of or a combination of at least two of N-type parylene, C-type parylene, D-type parylene, AF 2-type parylene, or AF 4-type parylene, and typical but non-limiting combinations include a combination of N-type parylene and C-type parylene, a combination of C-type parylene and D-type parylene, a combination of D-type parylene and AF 2-type parylene, or a combination of AF 2-type parylene and AF 4-type parylene.
Preferably, the thickness of the parylene film layer in step (2) is 2-10 μm, such as 2 μm, 3 μm, 4 μm, 5 μm, 6 μm, 7 μm, 8 μm, 9 μm or 10 μm, but not limited to the recited values, and other values not recited in the range of the values are also applicable.
In the invention, the parylene film layer in the step (2) can play roles of water resistance, oxygen isolation, rust prevention, corrosion prevention and wear resistance, so that the magnetic core product has a good protection effect, and can not rust even if being soaked in salt water for more than 24 hours.
Preferably, the laser power of the laser engraving in step (3) is 20-50W, such as 20W, 25W, 30W, 35W, 40W, 45W or 50W, but not limited to the recited values, and other values in the range of the recited values are also applicable.
Preferably, the engraving speed of the laser engraving in the step (3) is 200-.
In the invention, the laser engraving in the step (3) is carried out on a laser engraving machine.
In the invention, the laser engraving in the step (3) accurately removes the film layer and the surface oxide layer in the electroplating area to expose metal, thereby facilitating the subsequent electroplating treatment.
Preferably, the electroplating treatment in the step (4) comprises copper plating treatment, nickel plating treatment and tin plating treatment which are sequentially carried out.
The thickness of the copper plating layer in the copper plating treatment is preferably 1 to 4 μm, and may be, for example, 1 μm, 1.5 μm, 2 μm, 2.5 μm, 3 μm, 3.5 μm or 4 μm, but is not limited to the values listed above, and other values not listed above in the range of the values are also applicable.
In the present invention, the copper-plated layer subjected to the copper plating treatment serves as a transition layer between the surface of the magnetic core and the nickel-plated layer. Because copper metal has better ductility and has small stress when being combined with the surface of the magnetic core, the nickel plating treatment can overcome the problems of hard nickel plating layer and large stress on the basis, and ensure the adhesiveness of the electrode and the surface of the magnetic core.
In the invention, the copper plating treatment is specifically as follows: and putting the third alloy magnetic core cleaned by deionized water for 1-2min and the conductive beads into a plating basket, and locking the plating basket on a cathode of a copper plating tank. Starting the electroplating program, wherein the rotation speed of the plating basket is 3-6r/min, the current is 10-14A, the temperature of the copper plating solution is 15-35 ℃, and the copper plating time is 90-180 mim.
In the invention, the copper plating solution contains 150-220g/L CuSO4·5H2O, 50-70g/L H2SO4With 20-80mg/L CuCl2And the balance of deionized water.
The recitation of numerical ranges herein includes not only the endpoints of the ranges above, but also any number of points between the ranges above that are not recited, and for the sake of brevity and clarity, the present invention is not intended to be exhaustive of the specific points encompassed within the range.
Preferably, the thickness of the nickel plating layer of the nickel plating treatment is 1 to 3 μm, and may be, for example, 1 μm, 1.2 μm, 1.4 μm, 1.6 μm, 1.8 μm, 2 μm, 2.2 μm, 2.4 μm, 2.6 μm, 2.8 μm or 3 μm, but is not limited to the values listed, and other values not listed in the range of the values are also applicable.
In the present invention, the nickel-plated layer subjected to the nickel plating treatment improves the solder resistance of the electrode. Since the nickel metal has the characteristic of high melting point, the tin liquid is not easy to melt the electrode during subsequent soldering, and the nickel and the tin can generate affinity action.
In the invention, the specific way of the nickel plating treatment is as follows: and cleaning the third alloy magnetic core subjected to the copper plating treatment for 1-2min by using deionized water, putting the third alloy magnetic core and the conductive beads into a plating basket, and locking the plating basket on a cathode of a nickel plating bath. Starting the electroplating program, wherein the rotation speed of the plating basket is 3-6r/min, the current is 10-14A, the temperature of the nickel plating solution is 50-60 ℃, and the nickel plating time is 90-120 mim.
In the invention, the nickel plating solution contains 52-72g/L of Ni (NH)2SO3)212-15g/L NiCl2With 35-45mg/L of H2BO3And the balance of deionized water.
The recitation of numerical ranges herein includes not only the endpoints of the ranges above, but also any number of points between the ranges above that are not recited, and for the sake of brevity and clarity, the present invention is not intended to be exhaustive of the specific points encompassed within the range.
Preferably, the tin plating layer of the tin plating treatment has a thickness of 2 to 10 μm, and may be, for example, 2 μm, 3 μm, 4 μm, 5 μm, 6 μm, 7 μm, 8 μm, 9 μm or 10 μm, but is not limited to the values listed, and other values not listed in the numerical range are also applicable.
In the present invention, the tin plating layer of the tin plating treatment protects the nickel plating layer from oxidation. Because the tin metal is stable in the air, the oxidation layer is only limited to a thin layer on the surface and cannot go deep any more, so that the tin metal can play a role in protecting the nickel plating layer.
In the invention, the specific mode of the tin plating treatment is as follows: and cleaning the third alloy magnetic core subjected to the nickel plating treatment by using deionized water for 1-2min, putting the third alloy magnetic core and the conductive beads into a plating basket, and locking the plating basket on a cathode of a tin plating bath. Starting the electroplating program, controlling the rotation speed of the plating basket at 3-6r/min, controlling the current at 18-22A, controlling the tin plating temperature at 20-30 ℃ and controlling the tin plating time at 90-120 mim.
In the invention, the tin plating solution contains 9-12g/L SnSO4The balance being deionizationAnd (5) sub-water.
The recitation of numerical ranges herein includes not only the endpoints of the ranges above, but also any number of points between the ranges above that are not recited, and for the sake of brevity and clarity, the present invention is not intended to be exhaustive of the specific points encompassed within the range.
Preferably, the step (4) further comprises neutralization, water washing and drying which are sequentially carried out after the electroplating treatment.
Preferably, the neutralization solution used for neutralization is an alkali solution.
In the present invention, the alkali solution includes any one of a sodium hydroxide solution, a sodium carbonate solution or a sodium bicarbonate solution or a combination of at least two of them, and typical but non-limiting combinations include a combination of a sodium hydroxide solution and a sodium carbonate solution, a combination of a sodium carbonate solution and a sodium bicarbonate solution, a combination of a sodium hydroxide solution and a sodium bicarbonate solution, or a combination of a sodium hydroxide solution, a sodium carbonate solution and a sodium bicarbonate solution.
Preferably, the pH of the lye is 9 to 12, which may be, for example, 9, 9.5, 10, 10.5, 11, 11.5 or 12, but is not limited to the values listed, and other values not listed within this range of values are equally applicable.
Preferably, the neutralization time is 2-3min, and may be, for example, 2min, 2.1min, 2.2min, 2.3min, 2.4min, 2.5min, 2.6min, 2.7min, 2.8min, 2.9min or 3min, but is not limited to the recited values, and other values not recited in the numerical range are also applicable.
In the present invention, the neutralization is carried out in a neutralization tank.
Preferably, the water washing liquid adopted by the water washing is deionized water.
Preferably, the washing time is 1-2min, for example 1min, 1.1min, 1.2min, 1.3min, 1.4min, 1.5min, 1.6min, 1.7min, 1.8min, 1.9min or 2min, but is not limited to the recited values, and other values not recited in the range of values are equally applicable.
In the present invention, the washing is performed in a washing tank.
Preferably, the temperature of the drying is 120-150 ℃, for example, 120 ℃, 125 ℃, 130 ℃, 135 ℃, 140 ℃, 145 ℃ or 150 ℃, but is not limited to the recited values, and other values not recited in the range of the values are also applicable.
Preferably, the drying time is 60-120min, such as 60min, 70min, 80min, 90min, 100min, 110min or 120min, but not limited to the recited values, and other values not recited in the range of the values are also applicable.
In the invention, the drying is carried out in an oven.
As a preferred technical solution of the first aspect of the present invention, the preparation method comprises the steps of:
(1) pressing and molding the soft magnetic alloy powder with the sieving mesh number of 60-200 meshes, cutting and roasting to obtain a first alloy magnetic core; the pressure of the compression molding is 15-25T/cm2The pressed density is 6-7g/cm3(ii) a The roasting temperature is 600-900 ℃, and the roasting time is 4-12 h;
(2) depositing at least 1 parylene film layer on the surface of the first alloy magnetic core to obtain a second alloy magnetic core; the deposition comprises chemical vapor deposition, wherein the absolute vacuum degree of the chemical vapor deposition is 2-3Pa, the heating temperature is 180-750 ℃, the cracking temperature is 600-750 ℃, and the deposition time is 2-6 h; the thickness of the parylene film layer is 2-10 mu m;
(3) defining at least 2 electroplating areas on the surface of the second alloy magnetic core, and performing laser engraving with the laser power of 20-50W and the engraving speed of 200-400mm/s in the electroplating areas to obtain a third alloy magnetic core;
(4) and sequentially carrying out copper plating treatment with the plating thickness of 1-4 microns, nickel plating treatment with the plating thickness of 1-3 microns and tin plating treatment with the plating thickness of 2-10 microns in an electroplating area of the third alloy magnetic core, and then sequentially carrying out neutralization, water washing and drying to obtain the antirust alloy magnetic core.
In a second aspect, the present invention provides a rustproof alloy magnetic core prepared by the preparation method of the first aspect, wherein at least 1 parylene film layer, for example, 1 parylene film layer, 2 parylene film layers, 3 parylene film layers, 4 parylene film layers or 5 parylene film layers are disposed on the surface of the rustproof alloy magnetic core, but not limited to the recited values, and other unrecited values in the range of the recited values are also applicable.
In a third aspect, the present invention provides a use of the rust-inhibitive alloy magnetic core according to the second aspect for the production of an inductance component.
Compared with the prior art, the invention has the following beneficial effects:
(1) the preparation method provided by the invention has the advantages that at least 1 parylene film layer is arranged on the surface of the alloy magnetic core, and the parylene film layer has excellent compactness, permeability porosity, super-hydrophobicity and low friction coefficient, so that the alloy magnetic core has the characteristics of good water resistance, oxygen isolation, rust prevention, corrosion prevention and wear resistance, the selection range of alloy magnetic materials is widened, and some materials which are easy to oxidize, such as FeSi and pure Fe powder, can also be applied to the magnetic core to be made into composite magnetic materials;
(2) according to the preparation method provided by the invention, the film layer and the surface oxide layer in the surface electroplating area of the alloy magnetic core are accurately removed by laser engraving, so that metal is exposed, and electroplating silver paste is not needed for transition, so that the cost is saved, the control precision is improved, and the preparation method is particularly suitable for preparing the small-size (the average diameter is less than or equal to 8mm) alloy magnetic core.
Drawings
FIG. 1 is a schematic diagram of a first alloy magnetic core structure provided in examples 1-3;
FIG. 2 is a schematic diagram of a second alloy magnetic core according to embodiments 1-3;
wherein: 1-a wire groove; 2-electroplating area.
Detailed Description
The technical solution of the present invention is further explained by the following embodiments. It should be understood by those skilled in the art that the examples are only for the understanding of the present invention and should not be construed as the specific limitations of the present invention.
Example 1
The embodiment provides an antirust alloy magnetic core and a preparation method thereof, wherein the preparation method comprises the following steps:
(1) pressing and molding the soft magnetic alloy powder with the sieving mesh number of 100, cutting androasting to obtain an I-shaped first alloy magnetic core shown in figure 1, wherein 2 wire grooves 1 are formed in the surface of the first alloy magnetic core; the pressure of the press forming is 20T/cm2The pressed density was 6.5g/cm3(ii) a The roasting temperature is 750 ℃, and the roasting time is 8 hours;
the preparation method of the soft magnetic alloy powder comprises the following steps:
(A) adding pure Fe powder with the particle size of 7.5 mu m, polysiloxane resin and ethyl acetate into a reaction kettle, stirring to fully disperse and dissolve the pure Fe powder, the polysiloxane resin and the ethyl acetate until the ethyl acetate is completely volatilized, drying at 170 ℃ for 45min, and crushing in a crusher to obtain intermediate powder; the polysiloxane resin accounts for 4.5% of the mass of the pure Fe powder, and the ethyl acetate accounts for 30% of the mass of the pure Fe powder;
(B) adding the intermediate powder, polyvinyl butyral resin and absolute ethyl alcohol into a stirring tank for stirring, fully dispersing and dissolving until the absolute ethyl alcohol volatilizes 85 wt%, and drying at 70 ℃ to obtain magnetically soft alloy powder; the polyvinyl butyral resin accounts for 2% of the mass of the intermediate powder, and the absolute ethyl alcohol accounts for 25% of the mass of the intermediate powder;
(2) depositing 1 parylene film layer on the surface of the first alloy magnetic core to obtain a second alloy magnetic core; the deposition is chemical vapor deposition, and the specific mode is as follows: putting the first alloy magnetic core into a roller in vacuum coating equipment, wherein the volume of the magnetic core is 50% of that of the roller; various door covers of the equipment which need to be sealed are locked, and a vacuum chemical vapor deposition procedure is started; under the condition of absolute vacuum degree of 2.5Pa, the temperature of a parylene heating chamber is increased to 210 ℃ to volatilize the parylene heating chamber, argon is introduced to enable the parylene heating chamber to enter a cracking chamber along with airflow, the temperature of the cracking chamber is 700 ℃, and the parylene heating chamber is cracked into parylene monomers; finally, allowing the parylene monomer to enter a roller at room temperature, depositing for 4h, and forming a parylene film layer with the thickness of 6 microns on the surface of the first alloy magnetic core, wherein the parylene film layer is made of N-type parylene;
(3) as shown in fig. 2, a plating area 2 is defined at 2 on the surface of the second alloy magnetic core, and laser engraving with laser power of 35W and engraving speed of 300mm/s is performed in the plating area by using a laser engraving machine, so as to obtain a third alloy magnetic core;
(4) and sequentially carrying out copper plating treatment, nickel plating treatment and tin plating treatment in an electroplating area of the third alloy magnetic core:
copper plating treatment: putting the third alloy magnetic core cleaned for 2min by deionized water and the conductive beads into a plating basket, and locking the plating basket on a cathode of a copper plating bath; starting an electroplating program, wherein the rotation speed of a plating basket is 5r/min, the current is 12A, the temperature of a copper plating solution is 25 ℃, the copper plating time is 135 mm, and the thickness of the copper plating layer is 2.5 mu m; the copper plating solution contains 200g/L of CuSO4·5H2O, 60g/L H2SO4With 50mg/L of CuCl2The balance of deionized water, and the electroplating anode material is pure copper cake;
nickel plating treatment: washing the third alloy magnetic core subjected to the copper plating treatment for 2min by using deionized water, putting the third alloy magnetic core and the conductive beads into a plating basket, and locking the plating basket on a cathode of a nickel plating bath; starting an electroplating program, wherein the rotation speed of a plating basket is 5r/min, the current is 12A, the temperature of a nickel plating solution is 55 ℃, the nickel plating time is 100 mm, and the thickness of the nickel plating solution is 2 mu m; the nickel plating solution contains 60g/L of Ni (NH)2SO3)214g/L NiCl2With 40mg/L of H2BO3The balance of deionized water, and the electroplating anode material is a plum blossom nickel cake;
tin plating treatment: washing the third alloy magnetic core after the nickel plating treatment for 2min by using deionized water, putting the third alloy magnetic core and the conductive beads into a plating basket together, and locking the plating basket on a cathode of a tin plating bath; starting an electroplating program, wherein the rotation speed of a plating basket is 5r/min, the current is 20A, the temperature of a tinning liquid is 25 ℃, the nickel plating time is 100 mm, and the thickness of a tinning layer is 6 mu m; the tin plating solution contains 10g/L SnSO4The balance of deionized water, and the electroplating anode material is pure tin cake;
(5) and sequentially neutralizing, washing and drying the third alloy magnetic core subjected to electroplating treatment to obtain an antirust alloy magnetic core:
neutralization and water washing: soaking the magnetic core in a neutralization tank for 2.5min, then placing the magnetic core in a washing tank, washing the magnetic core with deionized water for 2min, and finally placing the magnetic core in a dehydrator for preliminary dehydration; the neutralization solution in the neutralization tank is a sodium hydroxide solution with the pH value of 10;
drying: and (3) drying the magnetic core after the preliminary dehydration in an oven at the temperature of 135 ℃ for 90 min.
When the rust-preventive alloy magnetic core obtained in this example was immersed in 10g/L of saline water for 28 hours, no occurrence of rust was observed.
Example 2
The embodiment provides an antirust alloy magnetic core and a preparation method thereof, wherein the preparation method comprises the following steps:
(1) pressing, molding, cutting and roasting the soft magnetic alloy powder with the sieving mesh number of 60 meshes to obtain an I-shaped first alloy magnetic core shown in figure 1, wherein 2 wire grooves 1 are arranged on the surface of the first alloy magnetic core; the pressure of the compression molding is 15T/cm2The pressed density was 6g/cm3(ii) a The roasting temperature is 600 ℃, and the roasting time is 12 hours;
the preparation method of the soft magnetic alloy powder comprises the following steps:
(A) adding FeSi with the particle size of 5 mu m, polysiloxane resin and ethyl acetate into a reaction kettle, stirring to fully disperse and dissolve the FeSi, the polysiloxane resin and the ethyl acetate until the ethyl acetate is completely volatilized, drying at 160 ℃ for 60min, and crushing in a crusher to obtain intermediate powder; the polysiloxane resin accounts for 1% of the mass of FeSi, and the ethyl acetate accounts for 20% of the mass of FeSi;
(B) adding the intermediate powder, polyvinyl butyral resin and absolute ethyl alcohol into a stirring tank for stirring, fully dispersing and dissolving until the absolute ethyl alcohol volatilizes 80 wt%, and drying at 60 ℃ to obtain the magnetically soft alloy powder; the polyvinyl butyral resin accounts for 1% of the mass of the intermediate powder, and the absolute ethyl alcohol accounts for 20% of the mass of the intermediate powder;
(2) depositing 2 parylene film layers on the surface of the first alloy magnetic core to obtain a second alloy magnetic core; the deposition is chemical vapor deposition, and the specific mode is as follows: putting the first alloy magnetic core into a roller in vacuum coating equipment, wherein the volume of the magnetic core is 45% of that of the roller; various door covers of the equipment which need to be sealed are locked, and a vacuum chemical vapor deposition procedure is started; under the condition of absolute vacuum degree of 2Pa, the temperature of a parylene heating chamber is increased to 180 ℃ to volatilize the parylene heating chamber, helium is introduced to enable the parylene heating chamber to enter a cracking chamber along with air flow, the temperature of the cracking chamber is 600 ℃, and the parylene heating chamber is cracked into parylene monomers; finally, allowing the parylene monomer to enter a roller at room temperature, depositing for 6h, and forming a parylene film layer with the thickness of 10 microns on the surface of the first alloy magnetic core, wherein the parylene film layer is made of C-type parylene;
(3) as shown in fig. 2, a plating area 2 is defined at 2 on the surface of the second alloy magnetic core, and laser engraving with laser power of 20W and engraving speed of 200mm/s is performed in the plating area by using a laser engraving machine, so as to obtain a third alloy magnetic core;
(4) and sequentially carrying out copper plating treatment, nickel plating treatment and tin plating treatment in an electroplating area of the third alloy magnetic core:
copper plating treatment: putting the third alloy magnetic core cleaned for 1min by deionized water and the conductive beads into a plating basket, and locking the plating basket on a cathode of a copper plating bath; starting an electroplating program, wherein the rotation speed of a plating basket is 3r/min, the current is 10A, the temperature of copper plating solution is 15 ℃, the copper plating time is 180 mm, and the thickness of a copper plating layer is 4 mu m; the copper plating solution contains 150g/L of CuSO4·5H2O, 50g/L H2SO4With 20mg/L of CuCl2The balance of deionized water, and the electroplating anode material is pure copper cake;
nickel plating treatment: washing the third alloy magnetic core subjected to the copper plating treatment for 1min by using deionized water, putting the third alloy magnetic core and the conductive beads into a plating basket, and locking the plating basket on a cathode of a nickel plating bath; starting an electroplating program, wherein the rotation speed of a plating basket is 3r/min, the current is 10A, the temperature of a nickel plating solution is 50 ℃, the nickel plating time is 120 mm, and the thickness of the nickel plating layer is 3 mu m; the nickel plating solution contains 52g/L of Ni (NH)2SO3)212g/L NiCl2With 35mg/L of H2BO3The balance of deionized water, and the electroplating anode material is a plum blossom nickel cake;
tin plating treatment: washing the third alloy magnetic core subjected to the nickel plating treatment for 1min by using deionized water, putting the third alloy magnetic core and the conductive beads into a plating basket together, and locking the plating basket on a cathode of a tin plating bath; the plating process is started, and the rotation speed of the plating basket is3r/min, the current is 18A, the temperature of the tinning liquid is 20 ℃, the nickel plating time is 120 mm, and the thickness of the tinning layer is 10 mu m; the tin plating solution contains 9g/L SnSO4The balance of deionized water, and the electroplating anode material is pure tin cake;
(5) and sequentially neutralizing, washing and drying the third alloy magnetic core subjected to electroplating treatment to obtain an antirust alloy magnetic core:
neutralization and water washing: soaking the magnetic core in a neutralization tank for 2min, then placing the magnetic core in a washing tank, washing the magnetic core with deionized water for 1min, and finally placing the magnetic core in a dehydrator for preliminary dehydration; the neutralizing solution in the neutralizing tank is a sodium carbonate solution with the pH value of 9;
drying: and (3) drying the magnetic core after the preliminary dehydration in an oven at the temperature of 120 ℃ for 120 min.
When the rust-preventive alloy magnetic core obtained in this example was immersed in 10g/L of saline water for 30 hours, no occurrence of rust was observed.
Example 3
The embodiment provides an antirust alloy magnetic core and a preparation method thereof, wherein the preparation method comprises the following steps:
(1) pressing, molding, cutting and roasting the soft magnetic alloy powder with the sieving mesh number of 200 meshes to obtain an I-shaped first alloy magnetic core shown in figure 1, wherein 2 wire grooves 1 are arranged on the surface of the first alloy magnetic core; the pressure of the press forming is 25T/cm2The pressed density was 7g/cm3(ii) a The roasting temperature is 900 ℃, and the roasting time is 4 hours;
the preparation method of the soft magnetic alloy powder comprises the following steps:
(A) FeSiCr with the particle size of 10 mu m, polysiloxane resin and ethyl acetate are added into a reaction kettle to be stirred, so that the mixture is fully dispersed and dissolved until the ethyl acetate is completely volatilized, the mixture is dried for 30min at 180 ℃, and the mixture is crushed in a crusher to obtain intermediate powder; the polysiloxane resin accounts for 8% of the weight of FeSiCr, and the ethyl acetate accounts for 40% of the weight of FeSiCr;
(B) adding the intermediate powder, polyvinyl butyral resin and absolute ethyl alcohol into a stirring tank for stirring, fully dispersing and dissolving until the absolute ethyl alcohol volatilizes 90 wt%, and drying at 75 ℃ to obtain soft magnetic alloy powder; the polyvinyl butyral resin accounts for 3% of the mass of the intermediate powder, and the absolute ethyl alcohol accounts for 30% of the mass of the intermediate powder;
(2) depositing 1 parylene film layer on the surface of the first alloy magnetic core to obtain a second alloy magnetic core; the deposition is chemical vapor deposition, and the specific mode is as follows: putting the first alloy magnetic core into a roller in vacuum coating equipment, wherein the volume of the magnetic core is 40% of that of the roller; various door covers of the equipment which need to be sealed are locked, and a vacuum chemical vapor deposition procedure is started; under the condition of absolute vacuum degree of 3Pa, the temperature of a parylene heating chamber is increased to 240 ℃ to volatilize the parylene heating chamber, argon is introduced to enable the parylene heating chamber to enter a cracking chamber along with airflow, the temperature of the cracking chamber is 750 ℃, and the parylene heating chamber is cracked into parylene monomers; finally, allowing the parylene monomer to enter a roller at room temperature, depositing for 2h, and forming a parylene film layer with the thickness of 2 microns on the surface of the first alloy magnetic core, wherein the parylene film layer is made of D-type parylene;
(3) as shown in fig. 2, a plating area 2 is defined at 2 on the surface of the second alloy magnetic core, and laser engraving with laser power of 50W and engraving speed of 400mm/s is performed in the plating area by using a laser engraving machine, so as to obtain a third alloy magnetic core;
(4) and sequentially carrying out copper plating treatment, nickel plating treatment and tin plating treatment in an electroplating area of the third alloy magnetic core:
copper plating treatment: putting the third alloy magnetic core cleaned for 2min by deionized water and the conductive beads into a plating basket, and locking the plating basket on a cathode of a copper plating bath; starting an electroplating program, wherein the rotation speed of a plating basket is 6r/min, the current is 14A, the temperature of a copper plating solution is 35 ℃, the copper plating time is 90 mm, and the thickness of the copper plating layer is 1 mu m; the copper plating solution contains 220g/L CuSO4·5H2O, 70g/L H2SO4With 80mg/L of CuCl2The balance of deionized water, and the electroplating anode material is pure copper cake;
nickel plating treatment: washing the third alloy magnetic core subjected to the copper plating treatment for 2min by using deionized water, putting the third alloy magnetic core and the conductive beads into a plating basket, and locking the plating basket on a cathode of a nickel plating bath; start toElectroplating, wherein the rotation speed of the plating basket is 6r/min, the current is 14A, the temperature of a nickel plating solution is 60 ℃, the nickel plating time is 90 mm, and the thickness of the nickel plating layer is 1 mu m; the nickel plating solution contains 72g/L of Ni (NH)2SO3)215g/L NiCl2With 45mg/L of H2BO3The balance of deionized water, and the electroplating anode material is a plum blossom nickel cake;
tin plating treatment: washing the third alloy magnetic core after the nickel plating treatment for 2min by using deionized water, putting the third alloy magnetic core and the conductive beads into a plating basket together, and locking the plating basket on a cathode of a tin plating bath; starting an electroplating program, wherein the rotation speed of a plating basket is 6r/min, the current is 22A, the temperature of a tinning liquid is 30 ℃, the nickel plating time is 90 mm, and the thickness of the tinning layer is 2 mu m; the tin plating solution contains 12g/L SnSO4The balance of deionized water, and the electroplating anode material is pure tin cake;
(5) and sequentially neutralizing, washing and drying the third alloy magnetic core subjected to electroplating treatment to obtain an antirust alloy magnetic core:
neutralization and water washing: soaking the magnetic core in a neutralization tank for 3min, then placing the magnetic core in a washing tank, washing the magnetic core with deionized water for 2min, and finally placing the magnetic core in a dehydrator for preliminary dehydration; the neutralization solution in the neutralization tank is a sodium bicarbonate solution with the pH value of 12;
drying: and (3) drying the magnetic core after the preliminary dehydration in an oven at the temperature of 150 ℃ for 60 min.
When the rust-preventive alloy magnetic core obtained in this example was immersed in 10g/L of saline water for 24 hours, no occurrence of rust was observed.
Example 4
This embodiment provides an antirust alloy magnetic core and a method for manufacturing the same, where the conditions other than the copper plating removal process are the same as those in embodiment 1, and therefore are not described herein again.
When the rust-preventive alloy magnetic core obtained in this example was immersed in 10g/L of saline water for 24 hours, no occurrence of rust was observed.
Example 5
This embodiment provides an antirust alloy magnetic core and a method for manufacturing the same, in which the copper plating process and the nickel plating process are removed, only the tin plating process is remained, and the other conditions are the same as those in embodiment 1, and thus the details are not repeated herein.
When the rust-preventive alloy magnetic core obtained in this example was immersed in 10g/L of saline water for 24 hours, no occurrence of rust was observed.
Comparative example 1
The present comparative example provides an alloy magnetic core and a method for preparing the same, wherein the preparation method is the same as that of example 1 except that the step (2) is removed, i.e., the parylene film layer is not deposited on the surface of the first alloy magnetic core, and therefore, the details are not repeated herein.
The alloy magnetic core obtained in the comparative example was immersed in 10g/L of saline water for 24 hours, and a number of rust spots were found.
Therefore, the preparation method provided by the invention has the advantages that at least 1 parylene film layer is arranged on the surface of the alloy magnetic core, and the parylene film layer has excellent compactness, permeability porosity, super-hydrophobicity and low friction coefficient, so that the alloy magnetic core has the characteristics of good water resistance, oxygen isolation, rust prevention, corrosion prevention and wear resistance, the selection range of alloy magnetic materials is widened, and some materials which are easy to oxidize, such as FeSi and pure Fe powder, can also be applied to the magnetic core to be made into composite magnetic materials; in addition, the preparation method adopts laser engraving to accurately remove the film layer and the surface oxide layer in the surface electroplating area of the alloy magnetic core, so that metal is exposed, electroplating silver paste is not needed for transition, the cost is saved, the control precision is improved, and the preparation method is particularly suitable for preparing the small-size (the average diameter is less than or equal to 8mm) alloy magnetic core.
The applicant declares that the above description is only a specific embodiment of the present invention, but the scope of the present invention is not limited thereto, and it should be understood by those skilled in the art that any changes or substitutions that can be easily conceived by those skilled in the art within the technical scope of the present invention are within the scope and disclosure of the present invention.
Claims (10)
1. A preparation method of an antirust alloy magnetic core is characterized by comprising the following steps:
(1) pressing and molding the soft magnetic alloy powder, cutting and roasting to obtain a first alloy magnetic core;
(2) arranging at least 1 parylene film layer on the surface of the first alloy magnetic core to obtain a second alloy magnetic core;
(3) defining at least 2 electroplating areas on the surface of the second alloy magnetic core, and performing laser engraving in the electroplating areas to obtain a third alloy magnetic core;
(4) and electroplating treatment is carried out in the electroplating area of the third alloy magnetic core to obtain the antirust alloy magnetic core.
2. The preparation method according to claim 1, wherein the soft magnetic alloy powder in the step (1) has a sieve mesh number of 60-200 meshes;
preferably, the pressure of the compression molding in the step (1) is 15-25T/cm2；
Preferably, the press-molding of step (1) has a press density of 6 to 7g/cm3；
Preferably, the roasting temperature in the step (1) is 600-900 ℃;
preferably, the roasting time of the step (1) is 4-12 h.
3. The preparation method according to claim 1 or 2, wherein the parylene film layer of step (2) is provided by coating and/or deposition, further preferably deposition;
preferably, the deposition comprises chemical vapor deposition;
preferably, the absolute vacuum degree of the chemical vapor deposition is 2-3 Pa;
preferably, the heating temperature of the chemical vapor deposition is 180-240 ℃;
preferably, the cracking temperature of the chemical vapor deposition is 600-750 ℃;
preferably, the deposition time of the chemical vapor deposition is 2-6 h.
4. The method for preparing according to any one of claims 1 to 3, wherein the parylene film of step (2) comprises any one of or a combination of at least two of parylene N, parylene C, parylene D, parylene AF2 or parylene AF 4;
preferably, the thickness of the parylene film layer in the step (2) is 2-10 μm.
5. The production method according to any one of claims 1 to 4, wherein the laser engraving of step (3) has a laser power of 20 to 50W;
preferably, the engraving speed of the laser engraving in the step (3) is 200-.
6. The production method according to any one of claims 1 to 5, wherein the plating treatment of step (4) comprises a copper plating treatment, a nickel plating treatment and a tin plating treatment which are performed in this order;
preferably, the thickness of the copper plating layer of the copper plating treatment is 1-4 μm;
preferably, the thickness of the nickel plating layer of the nickel plating treatment is 1-3 μm;
preferably, the tin plating layer of the tin plating treatment has a thickness of 2 to 10 μm.
7. The preparation method according to any one of claims 1 to 6, wherein the electroplating treatment of step (4) further comprises neutralization, water washing and drying sequentially;
preferably, the neutralization solution adopted in the neutralization is alkali liquor;
preferably, the pH value of the alkali liquor is 9-12;
preferably, the time for neutralization is 2-3 min;
preferably, the water washing liquid adopted by the water washing is deionized water;
preferably, the time of the water washing is 1-2 min;
preferably, the drying temperature is 120-150 ℃;
preferably, the drying time is 60-120 min.
8. The method of any one of claims 1 to 7, comprising the steps of:
(1) pressing and molding the soft magnetic alloy powder with the sieving mesh number of 60-200 meshes, cutting and roasting to obtain a first alloy magnetic core; the pressure of the compression molding is 15-25T/cm2The pressed density is 6-7g/cm3(ii) a The roasting temperature is 600-900 ℃, and the roasting time is 4-12 h;
(2) depositing at least 1 parylene film layer on the surface of the first alloy magnetic core to obtain a second alloy magnetic core; the deposition comprises chemical vapor deposition, wherein the absolute vacuum degree of the chemical vapor deposition is 2-3Pa, the heating temperature is 180-750 ℃, the cracking temperature is 600-750 ℃, and the deposition time is 2-6 h; the thickness of the parylene film layer is 2-10 mu m;
(3) defining at least 2 electroplating areas on the surface of the second alloy magnetic core, and performing laser engraving with the laser power of 20-50W and the engraving speed of 200-400mm/s in the electroplating areas to obtain a third alloy magnetic core;
(4) and sequentially carrying out copper plating treatment with the plating thickness of 1-4 microns, nickel plating treatment with the plating thickness of 1-3 microns and tin plating treatment with the plating thickness of 2-10 microns in an electroplating area of the third alloy magnetic core, and then sequentially carrying out neutralization, water washing and drying to obtain the antirust alloy magnetic core.
9. An antirust alloy magnetic core prepared according to the preparation method of any one of claims 1 to 8, wherein at least 1 parylene film layer is provided on the surface of the antirust alloy magnetic core.
10. Use of the rustproof alloy magnetic core according to claim 9 for the production of an inductance component.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202011613565.9A CN112837919A (en) | 2020-12-30 | 2020-12-30 | Antirust alloy magnetic core and preparation method and application thereof |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202011613565.9A CN112837919A (en) | 2020-12-30 | 2020-12-30 | Antirust alloy magnetic core and preparation method and application thereof |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN112837919A true CN112837919A (en) | 2021-05-25 |
Family
ID=75923918
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202011613565.9A Pending CN112837919A (en) | 2020-12-30 | 2020-12-30 | Antirust alloy magnetic core and preparation method and application thereof |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN112837919A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113880560A (en) * | 2021-11-17 | 2022-01-04 | 广东泛瑞新材料有限公司 | Split type water-plating metallization method for magnetic core |
Citations (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH11262224A (en) * | 1998-03-12 | 1999-09-24 | Minori Seiki Kk | Manufacture of coated metal member for electric component |
| CN102294476A (en) * | 2011-08-17 | 2011-12-28 | 天通控股股份有限公司 | Ferrosilicon material and mu75 ferrosilicon magnetic powder core manufacturing method |
| CN104091667A (en) * | 2014-06-05 | 2014-10-08 | 浙江大学 | Injection molding preparation method for metal magnetic powder cores |
| CN104575924A (en) * | 2015-02-11 | 2015-04-29 | 海安县巨力磁材有限责任公司 | Rust-resistance radial heterogenous magnetic ring |
| CN106128681A (en) * | 2016-06-08 | 2016-11-16 | 青岛云路先进材料技术有限公司 | A kind of Fe-based amorphous powder core and preparation method thereof |
| CN106229104A (en) * | 2016-08-31 | 2016-12-14 | 北京康普锡威科技有限公司 | A kind of soft magnetic composite powder and preparation process for magnetic powder core thereof |
| CN209388835U (en) * | 2019-01-25 | 2019-09-13 | 深圳顺络电子股份有限公司 | A kind of inductance core and inductor |
| CN110767440A (en) * | 2019-10-17 | 2020-02-07 | 上海史笛威磁性材料有限公司 | Surface treatment method of magnet, system and application of magnet |
| CN111755233A (en) * | 2020-06-24 | 2020-10-09 | 华萃微感电子(江苏)有限公司 | Sectional forming micro-inductor manufacturing process |
-
2020
- 2020-12-30 CN CN202011613565.9A patent/CN112837919A/en active Pending
Patent Citations (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH11262224A (en) * | 1998-03-12 | 1999-09-24 | Minori Seiki Kk | Manufacture of coated metal member for electric component |
| CN102294476A (en) * | 2011-08-17 | 2011-12-28 | 天通控股股份有限公司 | Ferrosilicon material and mu75 ferrosilicon magnetic powder core manufacturing method |
| CN104091667A (en) * | 2014-06-05 | 2014-10-08 | 浙江大学 | Injection molding preparation method for metal magnetic powder cores |
| CN104575924A (en) * | 2015-02-11 | 2015-04-29 | 海安县巨力磁材有限责任公司 | Rust-resistance radial heterogenous magnetic ring |
| CN106128681A (en) * | 2016-06-08 | 2016-11-16 | 青岛云路先进材料技术有限公司 | A kind of Fe-based amorphous powder core and preparation method thereof |
| CN106229104A (en) * | 2016-08-31 | 2016-12-14 | 北京康普锡威科技有限公司 | A kind of soft magnetic composite powder and preparation process for magnetic powder core thereof |
| CN209388835U (en) * | 2019-01-25 | 2019-09-13 | 深圳顺络电子股份有限公司 | A kind of inductance core and inductor |
| CN110767440A (en) * | 2019-10-17 | 2020-02-07 | 上海史笛威磁性材料有限公司 | Surface treatment method of magnet, system and application of magnet |
| CN111755233A (en) * | 2020-06-24 | 2020-10-09 | 华萃微感电子(江苏)有限公司 | Sectional forming micro-inductor manufacturing process |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113880560A (en) * | 2021-11-17 | 2022-01-04 | 广东泛瑞新材料有限公司 | Split type water-plating metallization method for magnetic core |
| CN113880560B (en) * | 2021-11-17 | 2022-08-02 | 广东泛瑞新材料有限公司 | Split type water-plating metallization method for magnetic core |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN110828183B (en) | Aluminum electrolytic capacitor anode foil manufacturing method based on sintered aluminum and capacitor | |
| CN111146005B (en) | Sintered low-voltage anode foil of aluminum electrolytic capacitor and preparation method thereof | |
| CN112289482A (en) | high-Q-value silver paste for 5G ceramic dielectric filter | |
| CN112837919A (en) | Antirust alloy magnetic core and preparation method and application thereof | |
| CN110814348A (en) | Preparation method of sintered aluminum foil with high specific volume | |
| CN109036852B (en) | Three-dimensional porous aluminum electrode foil and preparation method thereof | |
| WO2009099127A1 (en) | Element for electronic component | |
| KR101093502B1 (en) | Solid electrolytic capacitor and the use thereof | |
| CN107068398B (en) | A kind of preparation method and applications of graphene-silver electrode composite | |
| JP4561574B2 (en) | Conductive paste for multilayer ceramic component terminal electrode | |
| CN113470975B (en) | Ultrahigh specific volume electrode foil and preparation method thereof | |
| CN103578607A (en) | Base metal electrode structure and preparing method thereof | |
| CN116598141B (en) | Preparation method of surface hydroxylation sintered foil | |
| CN104021940A (en) | Cathode preparation process for reducing niobium oxide capacitor equivalent series resistance | |
| CN114141539B (en) | Preparation method of low-voltage electrode foil with good bending fatigue strength | |
| CN112466512B (en) | Inorganic coated insulated copper wire and preparation method thereof | |
| CN108615633A (en) | A kind of manufacturing method of contacts of vacuum switch | |
| CN101651047B (en) | Preparation method of Al2O3/Nb2O3 compound dielectric film aluminum electrode foil | |
| CN104538157A (en) | Terminal electrode of chip inductor, manufacturing method thereof and chip inductor | |
| CN112899683A (en) | Ceramic dielectric filter surface metallization method, product and application thereof | |
| CN112863882B (en) | High-specific-volume anode foil and preparation method and application thereof | |
| CN102810400A (en) | Composite solid electrolytic capacitor electrode plate and manufacturing method thereof | |
| CN114883103B (en) | Manufacturing method of low-temperature sintered copper electrode alloy iron powder core power inductor | |
| JP6588174B1 (en) | Method for producing a composite of ceramic and conductor | |
| CN115763050A (en) | Soft magnetic composite material and preparation method of corrosion-resistant magnetic core thereof |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| RJ01 | Rejection of invention patent application after publication | ||
| RJ01 | Rejection of invention patent application after publication |
Application publication date: 20210525 |