CN111804920A - Preparation method of anode foil of aluminum electrolytic capacitor based on laser sintering - Google Patents
Preparation method of anode foil of aluminum electrolytic capacitor based on laser sintering Download PDFInfo
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- CN111804920A CN111804920A CN202010616291.2A CN202010616291A CN111804920A CN 111804920 A CN111804920 A CN 111804920A CN 202010616291 A CN202010616291 A CN 202010616291A CN 111804920 A CN111804920 A CN 111804920A
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- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 title claims abstract description 100
- 239000011888 foil Substances 0.000 title claims abstract description 65
- 229910052782 aluminium Inorganic materials 0.000 title claims abstract description 56
- 238000000149 argon plasma sintering Methods 0.000 title claims abstract description 33
- 239000003990 capacitor Substances 0.000 title claims abstract description 25
- 238000002360 preparation method Methods 0.000 title claims abstract description 8
- 239000000843 powder Substances 0.000 claims abstract description 43
- 229910000838 Al alloy Inorganic materials 0.000 claims abstract description 41
- 239000000758 substrate Substances 0.000 claims abstract description 24
- 238000005245 sintering Methods 0.000 claims abstract description 22
- 239000002245 particle Substances 0.000 claims abstract description 11
- 238000005096 rolling process Methods 0.000 claims abstract description 9
- 230000015572 biosynthetic process Effects 0.000 claims description 37
- NBIIXXVUZAFLBC-UHFFFAOYSA-N Phosphoric acid Chemical compound OP(O)(O)=O NBIIXXVUZAFLBC-UHFFFAOYSA-N 0.000 claims description 30
- MUBZPKHOEPUJKR-UHFFFAOYSA-N Oxalic acid Chemical compound OC(=O)C(O)=O MUBZPKHOEPUJKR-UHFFFAOYSA-N 0.000 claims description 27
- 239000007788 liquid Substances 0.000 claims description 22
- 238000010438 heat treatment Methods 0.000 claims description 20
- 229910000147 aluminium phosphate Inorganic materials 0.000 claims description 15
- 238000000034 method Methods 0.000 claims description 15
- 239000003795 chemical substances by application Substances 0.000 claims description 14
- 235000006408 oxalic acid Nutrition 0.000 claims description 9
- KGBXLFKZBHKPEV-UHFFFAOYSA-N boric acid Chemical compound OB(O)O KGBXLFKZBHKPEV-UHFFFAOYSA-N 0.000 claims description 6
- 239000004327 boric acid Substances 0.000 claims description 6
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 6
- 239000004952 Polyamide Substances 0.000 claims description 3
- 229920002647 polyamide Polymers 0.000 claims description 3
- 239000011159 matrix material Substances 0.000 claims description 2
- 238000002791 soaking Methods 0.000 claims description 2
- 230000000694 effects Effects 0.000 abstract description 4
- 230000003647 oxidation Effects 0.000 description 3
- 238000007254 oxidation reaction Methods 0.000 description 3
- 239000010407 anodic oxide Substances 0.000 description 2
- 238000004090 dissolution Methods 0.000 description 2
- 239000007772 electrode material Substances 0.000 description 2
- 238000004519 manufacturing process Methods 0.000 description 2
- 239000002253 acid Substances 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000007797 corrosion Effects 0.000 description 1
- 238000005260 corrosion Methods 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 238000000227 grinding Methods 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 238000002844 melting Methods 0.000 description 1
- 230000008018 melting Effects 0.000 description 1
- 238000012876 topography Methods 0.000 description 1
- 238000003466 welding Methods 0.000 description 1
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- 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
- B22F7/00—Manufacture of composite layers, workpieces, or articles, comprising metallic powder, by sintering the powder, with or without compacting wherein at least one part is obtained by sintering or compression
- B22F7/02—Manufacture of composite layers, workpieces, or articles, comprising metallic powder, by sintering the powder, with or without compacting wherein at least one part is obtained by sintering or compression of composite layers
- B22F7/04—Manufacture of composite layers, workpieces, or articles, comprising metallic powder, by sintering the powder, with or without compacting wherein at least one part is obtained by sintering or compression of composite layers with one or more layers not made from powder, e.g. made from solid metal
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- 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
- B22F3/24—After-treatment of workpieces or articles
-
- 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
- B22F5/00—Manufacture of workpieces or articles from metallic powder characterised by the special shape of the product
- B22F5/006—Manufacture of workpieces or articles from metallic powder characterised by the special shape of the product of flat products, e.g. sheets
-
- C—CHEMISTRY; METALLURGY
- C25—ELECTROLYTIC OR ELECTROPHORETIC PROCESSES; APPARATUS THEREFOR
- C25D—PROCESSES FOR THE ELECTROLYTIC OR ELECTROPHORETIC PRODUCTION OF COATINGS; ELECTROFORMING; APPARATUS THEREFOR
- C25D11/00—Electrolytic coating by surface reaction, i.e. forming conversion layers
- C25D11/02—Anodisation
- C25D11/04—Anodisation of aluminium or alloys based thereon
- C25D11/06—Anodisation of aluminium or alloys based thereon characterised by the electrolytes used
- C25D11/08—Anodisation of aluminium or alloys based thereon characterised by the electrolytes used containing inorganic acids
-
- C—CHEMISTRY; METALLURGY
- C25—ELECTROLYTIC OR ELECTROPHORETIC PROCESSES; APPARATUS THEREFOR
- C25D—PROCESSES FOR THE ELECTROLYTIC OR ELECTROPHORETIC PRODUCTION OF COATINGS; ELECTROFORMING; APPARATUS THEREFOR
- C25D11/00—Electrolytic coating by surface reaction, i.e. forming conversion layers
- C25D11/02—Anodisation
- C25D11/04—Anodisation of aluminium or alloys based thereon
- C25D11/06—Anodisation of aluminium or alloys based thereon characterised by the electrolytes used
- C25D11/10—Anodisation of aluminium or alloys based thereon characterised by the electrolytes used containing organic acids
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01G—CAPACITORS; CAPACITORS, RECTIFIERS, DETECTORS, SWITCHING DEVICES, LIGHT-SENSITIVE OR TEMPERATURE-SENSITIVE DEVICES OF THE ELECTROLYTIC TYPE
- H01G9/00—Electrolytic capacitors, rectifiers, detectors, switching devices, light-sensitive or temperature-sensitive devices; Processes of their manufacture
- H01G9/004—Details
- H01G9/04—Electrodes or formation of dielectric layers thereon
- H01G9/042—Electrodes or formation of dielectric layers thereon characterised by the material
- H01G9/045—Electrodes or formation of dielectric layers thereon characterised by the material based on aluminium
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01G—CAPACITORS; CAPACITORS, RECTIFIERS, DETECTORS, SWITCHING DEVICES, LIGHT-SENSITIVE OR TEMPERATURE-SENSITIVE DEVICES OF THE ELECTROLYTIC TYPE
- H01G9/00—Electrolytic capacitors, rectifiers, detectors, switching devices, light-sensitive or temperature-sensitive devices; Processes of their manufacture
- H01G9/004—Details
- H01G9/04—Electrodes or formation of dielectric layers thereon
- H01G9/048—Electrodes or formation of dielectric layers thereon characterised by their structure
- H01G9/052—Sintered electrodes
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01G—CAPACITORS; CAPACITORS, RECTIFIERS, DETECTORS, SWITCHING DEVICES, LIGHT-SENSITIVE OR TEMPERATURE-SENSITIVE DEVICES OF THE ELECTROLYTIC TYPE
- H01G9/00—Electrolytic capacitors, rectifiers, detectors, switching devices, light-sensitive or temperature-sensitive devices; Processes of their manufacture
- H01G9/004—Details
- H01G9/04—Electrodes or formation of dielectric layers thereon
- H01G9/048—Electrodes or formation of dielectric layers thereon characterised by their structure
- H01G9/052—Sintered electrodes
- H01G9/0525—Powder therefor
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- 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
- B22F3/24—After-treatment of workpieces or articles
- B22F2003/248—Thermal after-treatment
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Abstract
A preparation method of an anode foil of an aluminum electrolytic capacitor based on laser sintering comprises the following steps of 1) rolling aluminum powder or aluminum alloy powder particles on an aluminum foil substrate; 2) sintering aluminum powder on the aluminum foil substrate in a laser scanning mode, wherein the temperature of a laser irradiation position on the aluminum foil substrate is 660-680 ℃, and the laser irradiation speed is 0.5-5 cm/s. In the invention, the aluminum powder or the aluminum alloy powder is sintered on the aluminum foil substrate by adopting a laser sintering mode, and the power of the laser on the aluminum powder or the aluminum alloy powder can be adjusted, so that the power of the laser can be adjusted to the most appropriate state when the laser is used for sintering, the quality of the sintered aluminum foil is very high, the laser sintering time can be conveniently adjusted, and the sintering effect can be intuitively and quickly reflected.
Description
Technical Field
The invention relates to an aluminum electrolytic capacitor, in particular to a preparation method of an anode foil of an aluminum electrolytic capacitor based on laser sintering.
Background
The anode foil of the aluminum electrolytic capacitor is generally made of corrosion foil, and individual products are made of sintered foil, but the technology of the anode foil made by sintering is mastered in Japan enterprises and still at the beginning stage in China, and the Japanese products are bought for wanted or qualified products; paying considerable cost to domestic enterprises. For example, japanese eastern aluminum co.Ltd, the first patent that was filed in 2008, patent No. 200880128783.4, an electrode material for aluminum electrolytic capacitors and a method for producing the electrode material. The anode foil manufactured by sintering the film on the aluminum foil substrate has high electrostatic capacity.
However, in the manufacturing process, it is found that the temperature and time are very difficult to control during sintering, the melting point of aluminum is 660 ℃, and when the temperature is too high or the time is too long, the aluminum powder or the aluminum alloy powder is rapidly melted during sintering, so that the aluminum powder or the aluminum alloy powder is "caked", that is, the aluminum powder or the aluminum alloy powder loses gaps after sintering, but when the sintering temperature is too low or the time is too short, the phenomenon of "powdering" occurs, that is, the powder is not sintered together and even powder falls off occurs.
Disclosure of Invention
The invention aims to overcome the defects of the prior art and provide a preparation method of the anode foil of the aluminum electrolytic capacitor based on laser sintering, which has uniform sintering and good sintering quality.
In order to solve the technical problems, the technical scheme provided by the invention is as follows: a preparation method of an anode foil of an aluminum electrolytic capacitor based on laser sintering comprises the following steps of 1) rolling aluminum powder or aluminum alloy powder particles on an aluminum foil substrate;
2) sintering aluminum powder on the aluminum foil substrate in a laser scanning mode, wherein the temperature of a laser irradiation position on the aluminum foil substrate is 660-680 ℃, and the laser irradiation speed is 0.5-5 cm/s.
Preferably, in the step 2), two laser generators are used for scanning during laser sintering, after aluminum powder or aluminum alloy powder is rolled, one laser generator adopts low power to scan and preheat the aluminum powder or the aluminum alloy powder, then the other laser generator adopts high power to perform laser scanning sintering, the two lasers are used for scanning simultaneously, the low-power laser generator is positioned at the front end of a scanning path, and the high-power laser generator is adopted to follow the scanning path; the temperature of the low-power laser generator when the low-power laser generator is applied to the aluminum powder or the aluminum alloy powder is 150-350 ℃, and the temperature of the high-power laser generator when the high-power laser generator is applied to the aluminum powder or the aluminum alloy powder is 660-680 ℃.
Preferably, the method for preparing the anode foil of the aluminum electrolytic capacitor based on laser sintering further comprises a step 3) after the step 2), wherein the step 3) is to perform heat treatment on the aluminum foil substrate sintered in the step 2), the temperature of the heat treatment is 150-350 ℃, and the time is 30-80 minutes.
In the above method for preparing the positive electrode foil of the aluminum electrolytic capacitor based on laser sintering, preferably, step 3) is followed by step 4), and step 4) is to put the positive electrode foil of step 3) into pure water and boil for 5-20 min; maintaining the water at 60 ℃ and oscillating for 1-12h by ultrasonic.
In the above method for preparing the anode foil of the aluminum electrolytic capacitor based on laser sintering, preferably, step 5), the anode foil treated in step 4) is put in a phosphoric acid solutionSoaking for 30 seconds to 3 min; the concentration of the phosphoric acid solution is between 0.5 and 3 percent; 6) forming, namely forming the anode foil sintered in the step 5) in forming liquid with the forming current of 3A/dm2-6A/dm2The time is 5min-20 min; the formation liquid comprises one of boric acid system formation liquid, oxalic acid system formation liquid and phosphoric acid system formation liquid or mixed formation liquid consisting of an oxalic acid system and a phosphoric acid system; the formation voltage in the boric acid system is 200-500V, the formation voltage in the oxalic acid system is 30-80V, the formation voltage in the phosphoric acid system is 10-60V, and the formation voltage in the mixed formation liquid is 30-60V.
In the above method for preparing the positive electrode foil of the aluminum electrolytic capacitor based on laser sintering, preferably, the matrix is subjected to oxide film removing treatment before rolling the aluminum powder or the aluminum alloy powder.
In the above method for preparing the anode foil of the aluminum electrolytic capacitor based on laser sintering, preferably, the average particle diameter of the aluminum powder and the aluminum alloy powder particles is 2-20 micrometers, and the thickness of the aluminum foil rolled on the aluminum foil substrate is 10-100 micrometers.
In the above method for preparing the positive electrode foil of the aluminum electrolytic capacitor based on laser sintering, preferably, the aluminum powder or the aluminum alloy powder is subjected to a pretreatment before rolling, the pretreatment includes a heat treatment and a treatment agent treatment, and the treatment agent includes polyamide; the temperature of the heat treatment agent is 200-400 ℃, the time is 20-60 minutes, and after the heat treatment of the heat treatment agent, the content of the heat treatment agent is 1-1.5 percent of the total weight of the aluminum powder or the aluminum alloy powder.
It should be noted that, the aluminum material has a strong reflection to the laser, which makes the laser sintering or welding difficult, but in the present invention, aluminum powder or aluminum alloy powder is sintered on the aluminum foil substrate by laser sintering, and since the powder is gathered on the aluminum foil substrate, the fine voids are beneficial to diffuse reflection, which can increase the sintering effect.
Compared with the prior art, the invention has the advantages that: in the invention, the aluminum powder or the aluminum alloy powder is sintered on the aluminum foil substrate by adopting a laser sintering mode, and the power of the laser on the aluminum powder or the aluminum alloy powder can be adjusted, so that the power of the laser can be adjusted to the most appropriate state when the laser is used for sintering, the quality of the sintered aluminum foil is very high, the laser sintering time can be conveniently adjusted, and the sintering effect can be intuitively and quickly reflected.
Drawings
FIG. 1 is a cross-sectional micro-topography of a positive electrode foil of an aluminum electrolytic capacitor using laser sintering-based in example 1.
Detailed Description
In order to facilitate an understanding of the present invention, the present invention will be described more fully and in detail with reference to the preferred embodiments, but the scope of the present invention is not limited to the specific embodiments described below.
It should be particularly noted that when an element is referred to as being "fixed to, connected to or communicated with" another element, it can be directly fixed to, connected to or communicated with the other element or indirectly fixed to, connected to or communicated with the other element through other intermediate connecting components.
Unless otherwise defined, all terms of art used hereinafter have the same meaning as commonly understood by one of ordinary skill in the art. The terminology used herein is for the purpose of describing particular embodiments only and is not intended to limit the scope of the present invention.
Example 1
A preparation method of a laser sintering-based anode foil of an aluminum electrolytic capacitor comprises the following steps of 1) rolling aluminum powder or aluminum alloy powder particles on an aluminum foil substrate with an oxidation film removed;
2) sintering aluminum powder on the aluminum foil substrate in a laser scanning mode, wherein the temperature of a laser irradiation position on the aluminum foil substrate is 660-680 ℃, and the laser irradiation speed is 0.5-5 cm/s. Scanning by adopting two laser generators during laser sintering in the step 2), scanning and preheating the aluminum powder or the aluminum alloy powder by adopting low power by one laser generator after the aluminum powder or the aluminum alloy powder is rolled, then scanning and sintering the aluminum powder or the aluminum alloy powder by adopting high power by the other laser generator, simultaneously scanning by the two lasers, positioning the laser generator with low power at the front end of a scanning path, and immediately following the laser generator with high power; the temperature is 150-350 ℃ when the low-power laser generator is irradiated on the aluminum powder or the aluminum alloy powder, and the temperature is 660-680 ℃ when the high-power laser generator is irradiated on the aluminum powder or the aluminum alloy powder.
And step 3) carrying out heat treatment on the aluminum foil substrate sintered in the step 2), wherein the heat treatment temperature is 150-350 ℃ and the time is 30-80 minutes.
Step 4) is also included after the step 3), and the step 4) is to put the anode foil in the step 3) into pure water and boil for 5-20 min; maintaining the water at 60 ℃ and oscillating for 1-12h by ultrasonic.
Step 5), soaking the anode foil treated in the step 4) in a phosphoric acid solution for 30 seconds to 3 minutes; the concentration of the phosphoric acid solution is between 0.5 and 3 percent.
6) Forming, namely forming the anode foil sintered in the step 5) in forming liquid with the forming current of 3A/dm2-6A/dm2The time is 5min-20 min; the formation liquid comprises one of boric acid system formation liquid, oxalic acid system formation liquid and phosphoric acid system formation liquid or mixed formation liquid consisting of an oxalic acid system and a phosphoric acid system; the formation voltage in the boric acid system is 200-500V, the formation voltage in the oxalic acid system is 30-80V, the formation voltage in the phosphoric acid system is 10-60V, and the formation voltage in the mixed formation liquid is 30-60V.
The formation current and the formation voltage in the invention refer to the output current and the voltage of the power supply during formation, and when the formation current is lower than 3A/dm2In the case of (2), since the surface resistance of the sintered film is large, the balance between the dissolution rate and the formation rate of the oxide film is easily achieved, and when the current density of formation is less than 3A/dm2It is easy to form a vacuum of formation on the sintered film, that is, an oxide film is not formed locally. When the current density is a single independent variable, the anodic oxide film is generated faster when the current density is higher, and the reduction of the oxidation time can reduce the oxidation film in the acid forming liquidThereby increasing the density of the oxide film. However, in the process of forming the oxide film, the larger the current density is, the faster the anodic oxide film is produced, and the more heat is generated, and particularly, in the place where the projections or the spikes are formed in the sintered film, the more electrons are collected, and a position where the local current density is large is generated, so that the temperature of the local sintered film and the temperature of the surrounding forming liquid are increased, and overburning is easily caused, and the dissolution of the oxide film is accelerated. In view of the above two considerations, the current density is preferably 3A/dm in the present application2-6A/dm2The width of the current density is chosen to be rather narrow.
In this example, the average particle diameter of the aluminum powder and aluminum alloy powder particles is 2 to 20 microns and the thickness of the aluminum alloy particles rolled on the aluminum foil substrate is 10 to 100 microns.
In the embodiment, the aluminum powder or aluminum alloy powder is subjected to pretreatment before rolling, the pretreatment comprises heat treatment and treatment agent treatment, and the treatment agent comprises polyamide; the temperature of the heat treatment agent is 200-400 ℃, the time is 20-60 minutes, and the content of the heat treatment agent is 1-1.5 percent of the total weight of the aluminum powder or the aluminum alloy powder after the heat treatment.
As shown in FIG. 1, the anode foil of this example had a capacitance of 254.8. mu.F/cm2。
In the invention, the aluminum powder or the aluminum alloy powder is sintered on the aluminum foil substrate by adopting a laser sintering mode, and the power of the laser on the aluminum powder or the aluminum alloy powder can be adjusted, so that the power of the laser can be adjusted to the most appropriate state when the laser is used for sintering, the quality of the sintered aluminum foil is very high, the laser sintering time can be conveniently adjusted, and the sintering effect can be intuitively and quickly reflected.
Claims (8)
1. A preparation method of an anode foil of an aluminum electrolytic capacitor based on laser sintering is characterized by comprising the following steps: the method comprises the following steps of 1) rolling aluminum powder or aluminum alloy powder particles on an aluminum foil substrate;
2) sintering aluminum powder on the aluminum foil substrate in a laser scanning mode, wherein the temperature of a laser irradiation position on the aluminum foil substrate is 660-680 ℃, and the laser irradiation speed is 0.5-5 cm/s.
2. The method for preparing the positive electrode foil of the laser sintering-based aluminum electrolytic capacitor according to claim 1, wherein: scanning by adopting two laser generators during laser sintering in the step 2), scanning and preheating the aluminum powder or the aluminum alloy powder by adopting low power by one laser generator after the aluminum powder or the aluminum alloy powder is rolled, then scanning and sintering the aluminum powder or the aluminum alloy powder by adopting high power by the other laser generator, simultaneously scanning by the two lasers, positioning the laser generator with low power at the front end of a scanning path, and immediately following the laser generator with high power; the temperature of the low-power laser generator when the low-power laser generator is applied to the aluminum powder or the aluminum alloy powder is 150-350 ℃, and the temperature of the high-power laser generator when the high-power laser generator is applied to the aluminum powder or the aluminum alloy powder is 660-680 ℃.
3. The method for preparing the positive electrode foil of the laser sintering-based aluminum electrolytic capacitor according to claim 1, wherein: and a step 3) is further included after the step 2), wherein the step 3) is to perform heat treatment on the aluminum foil substrate sintered in the step 2), the temperature of the heat treatment is 150-350 ℃, and the time is 30-80 minutes.
4. The method for preparing the positive electrode foil of the laser sintering-based aluminum electrolytic capacitor according to claim 3, wherein: step 4) is also included after the step 3), and the step 4) is to put the anode foil in the step 3) into pure water and boil for 5-20 min; maintaining the water at 60 ℃ and oscillating for 1-12h by ultrasonic.
5. The method for preparing the positive electrode foil of the laser sintering-based aluminum electrolytic capacitor according to claim 4, wherein: step 5), soaking the anode foil treated in the step 4) in a phosphoric acid solution for 30 seconds to 3 minutes; the concentration of the phosphoric acid solution is between 0.5 and 3 percent;
6) forming, namely forming the anode foil sintered in the step 5) in forming liquid with the forming current of 3A/dm2-6 A/dm2The time is 5min-20 min; the formation liquid comprises one of boric acid system formation liquid, oxalic acid system formation liquid and phosphoric acid system formation liquid or mixed formation liquid consisting of an oxalic acid system and a phosphoric acid system; the formation voltage in the boric acid system is 200-500V, the formation voltage in the oxalic acid system is 30-80V, the formation voltage in the phosphoric acid system is 10-60V, and the formation voltage in the mixed formation liquid is 30-60V.
6. The method for preparing the positive electrode foil of the laser sintering-based aluminum electrolytic capacitor according to claim 1, wherein: before rolling aluminum powder or aluminum alloy powder, the matrix is subjected to oxide film removal treatment.
7. The method for preparing the positive electrode foil of the laser sintering-based aluminum electrolytic capacitor according to claim 1, wherein: the average grain diameter of the aluminum powder and the aluminum alloy powder particles is 2-20 microns, and the thickness of the aluminum powder and the aluminum alloy powder particles rolled on the aluminum foil substrate is 10-100 microns.
8. The method for preparing the positive electrode foil of the laser sintering-based aluminum electrolytic capacitor according to claim 7, wherein: the aluminum powder or aluminum alloy powder is subjected to pretreatment before rolling, the pretreatment comprises heat treatment and treatment with a treating agent, and the treating agent comprises polyamide; the temperature of the heat treatment agent is 200-400 ℃, the time is 20-60 minutes, and after the heat treatment of the heat treatment agent, the content of the heat treatment agent is 1-1.5 percent of the total weight of the aluminum powder or the aluminum alloy powder.
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114107855A (en) * | 2021-09-09 | 2022-03-01 | 九江德福科技股份有限公司 | Surface passivation treatment method of cathode roller for electrolytic copper foil |
| CN116100027A (en) * | 2023-04-04 | 2023-05-12 | 南通海星电子股份有限公司 | Preparation method of laser scanning assisted laminated foil |
Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1990914A (en) * | 2005-12-30 | 2007-07-04 | 新疆众和股份有限公司 | Forming technique for reducing voltage rising time of aluminum electrolytic capacitor anode foil |
| CN103563028A (en) * | 2011-05-26 | 2014-02-05 | 东洋铝株式会社 | Electrode material for aluminum electrolytic capacitor, and process for producing same |
| CN103688327A (en) * | 2011-07-15 | 2014-03-26 | 东洋铝株式会社 | Electrode material for aluminum electrolytic capacitor, and method for producing same |
| CN103658660A (en) * | 2012-09-25 | 2014-03-26 | 日本轻金属株式会社 | Porous aluminum body, aluminum electrolytic capacitor, and manufacturing method of porous aluminum body |
| CN108380877A (en) * | 2018-03-24 | 2018-08-10 | 安徽拓宝增材制造科技有限公司 | A kind of laser sintering processes of metal powder |
| CN110814348A (en) * | 2019-11-22 | 2020-02-21 | 湖南艾华集团股份有限公司 | Preparation method of sintered aluminum foil with high specific volume |
-
2020
- 2020-07-01 CN CN202010616291.2A patent/CN111804920A/en active Pending
Patent Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1990914A (en) * | 2005-12-30 | 2007-07-04 | 新疆众和股份有限公司 | Forming technique for reducing voltage rising time of aluminum electrolytic capacitor anode foil |
| CN103563028A (en) * | 2011-05-26 | 2014-02-05 | 东洋铝株式会社 | Electrode material for aluminum electrolytic capacitor, and process for producing same |
| US20140098460A1 (en) * | 2011-05-26 | 2014-04-10 | Toyo Aluminium Kabushiki Kaisha | Electrode material for aluminum electrolytic capacitor, and process for producing same |
| CN103688327A (en) * | 2011-07-15 | 2014-03-26 | 东洋铝株式会社 | Electrode material for aluminum electrolytic capacitor, and method for producing same |
| CN103658660A (en) * | 2012-09-25 | 2014-03-26 | 日本轻金属株式会社 | Porous aluminum body, aluminum electrolytic capacitor, and manufacturing method of porous aluminum body |
| CN108380877A (en) * | 2018-03-24 | 2018-08-10 | 安徽拓宝增材制造科技有限公司 | A kind of laser sintering processes of metal powder |
| CN110814348A (en) * | 2019-11-22 | 2020-02-21 | 湖南艾华集团股份有限公司 | Preparation method of sintered aluminum foil with high specific volume |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114107855A (en) * | 2021-09-09 | 2022-03-01 | 九江德福科技股份有限公司 | Surface passivation treatment method of cathode roller for electrolytic copper foil |
| CN116100027A (en) * | 2023-04-04 | 2023-05-12 | 南通海星电子股份有限公司 | Preparation method of laser scanning assisted laminated foil |
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