CN1301519C - Method for mfg negative electrode foil of aluminium electrolytic capacitor - Google Patents
Method for mfg negative electrode foil of aluminium electrolytic capacitor Download PDFInfo
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- CN1301519C CN1301519C CNB031398278A CN03139827A CN1301519C CN 1301519 C CN1301519 C CN 1301519C CN B031398278 A CNB031398278 A CN B031398278A CN 03139827 A CN03139827 A CN 03139827A CN 1301519 C CN1301519 C CN 1301519C
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Abstract
The present invention relates to a method for preparing negative electrode foils for aluminium electrolytic capacitors, which comprises the procedures of corrosion, mid-treatment and post-treatment. The present invention is characterized in that foils are firstly burnt after corrosion, and the mid-treatment and the post-treatment are carried out after the foils are burnt. The specific process flow of the method comprises the procedures of pretreatment, corrosion, foil burning, mid-treatment, post-treatment and baking. The foils are burnt in a baking oven of which the temperature is 300 to 550 DEG C and the time is 30 to 80 seconds. An oxide film layer is formed on the surface of the aluminium foils after the foils are burnt, and the shapes of surface holes which are freshly corroded on the aluminium foil are solidified so as to reduce the surface damage of the negative electrode foils during mid-treatmentd and improve the specific volume and the surface quality of the negative electrode foils. A procedure of preparative mid-treatment can be added before the foils are burnt after corrosion. The specific process flow of the method comprises the procedures of pretreatment, corrosion, foil burning, mid-treatment, post-treatment and baking. The processing temperature of the preparative mid-treatment is 28 to 35 DEG C, and the time is 25 to 50 seconds. Due to the addition of the preparative mid-treatment, the effect of foil burning is further improved, and the surface quality of the aluminum foil is increased.
Description
Affiliated technical field
The present invention relates to the aluminium electrolytic capacitor negative electrode foil making method, especially refer to the processing method of anticathode paper tinsel in the aluminium electrolytic capacitor cathode foil manufacturing processing procedure.
Background technology
Along with modern information technology development, aluminium electrolytic capacitor is widely used in electronics, instrument, communication, measurement, computer, the aeronautical and space technology, people are higher to the requirement of electrolytic capacitor, anode foil is one of critical material of making by electrolytic capacitor, improve constantly the specific volume of anode foil, improving surface quality is the target that people pursue.Existing anode foil is made in the processing procedure, the technical process of corrosion → middle processing → post processing → oven dry is generally adopted in the processing of anticathode paper tinsel, and most domestic adopts from the aluminium foil manufactory of the pure chemistry corrosion line of Nagano, Japan introduction and just adopts this treatment process process.Existing anode foil is made in the processing procedure, the processing of anticathode paper tinsel also has the technical process of employing pre-treatment → corrosion → middle processing → post processing → oven dry, pre-treatment is the various physics of doing before paper tinsel is corroded, the processing of chemistry, Main Function is greasy dirt, impurity and the natural oxide film of removing aluminium foil surface, improve its surface state, make its surface uniform, activation, form equally distributed hole when being beneficial to corrode, improve the specific volume of aluminium foil.Corrosion is meant the corrosion treatment of paillon foil being carried out electrochemistry or chemistry, and it is equally distributed and the corrosion pit of certain depth is arranged to make its surface form high density, thereby increases the surface area of aluminium foil.The treatment process of aforementioned two kinds of anticathode paper tinsels all is just to carry out middle processing behind corrosion process, and it can cause the initial specific volume of aluminium foil seriously to be decayed.
Summary of the invention
The present invention provides a kind of and can not only effectively reduce the specific volume decay of aluminium foil in middle processing procedure for overcoming the deficiencies in the prior art, also improves the anode foil processing method of the surface brightness of aluminium foil.
The present invention adopts technical scheme to be: a kind of Aluminium Electrolytic Capacitor Negative Pole Foil Manufacturing Approach comprises in pre-treatment, the burn into and handling and reprocessing.After described corrosion, earlier paillon foil is burnt sheet and process, and then carry out described middle the processing and post processing.Its concrete technology flow process is pre-treatment → corrosion → burning sheet → middle processing → post processing → oven dry.Described burning sheet is processed and is carried out in oven heat, and treatment temperature is 300～550 ℃, and the time is 30～80 seconds.The surface of the aluminium foil that the described burning sheet of process is processed can form layer oxide film, and can solidify the surface hole defect pattern that has just eroded away on the aluminium foil, the surface breakdown of anticathode paper tinsel when processing in the minimizing, thereby specific volume and the surface quality of raising anode foil.The temperature that paillon foil carries out described burning sheet processing is 380～430 ℃, and effect was better when the time was 45～60 seconds.
Burn the effect that sheet is processed for further improving, improve the surface quality of aluminium foil, process in before described paillon foil burns the sheet processing, earlier paillon foil being prepared, process in the described preparation and refer to aluminium foil is carried out slight surface treatment, with Heisui River and the hydrated aluminum film of washing aluminium foil surface off, make in the burning sheet processing of carrying out after a while the too much situation of foil surfaces content of copper ion can not take place.It is the HNO of 0.5～0.9mol/L that the treatment fluid of processing in the described preparation adopts concentration
3Solution, the treatment temperature of processing in the described preparation are 28～35 ℃, and the time is 25～50 seconds.
The invention has the beneficial effects as follows: behind the aluminium electrolytic capacitor cathode foil corrosion process, increase paillon foil is burnt the sheet processing, can form layer oxide film at aluminium foil surface, and the surface hole defect pattern that aluminium foil has just been eroded away solidifies, the surface breakdown of anticathode paper tinsel when processing in the minimizing, specific volume and the surface quality of raising anode foil.
Embodiment
Comparative Examples: technological process is: pre-treatment → washing → corrosion → washing → middle processing → washing → post processing → oven dry.The aluminium foil that adopts is the purity 〉=97% aluminium foil of domestic 50um, and its specific volume before middle processing is about 1000 μ F/cm
2The pretreatment liquid that pre-treatment is adopted is 2% sodium hydroxide solution, when temperature is 50 ℃, aluminium foil is handled 30 seconds; The corrosive liquid that described corrosion is adopted consists of: free acid 1.5 ± 0.5N, and total acid 5.5 ± 0.5N, aluminium ion 4.2 ± 0.7N, chloride ion 5.5 ± 0.5N, 98 ± 3 ℃ of corrosion temperatures, the time is 15-30 second; The condition of handling in described is: it is the HNO of 0.5mol/L that middle treatment fluid adopts concentration
3Solution, the temperature of middle treatment fluid are 55 ℃, and the time is 60 seconds; The aftertreatment fluid that described reprocessing is adopted is 0.5% ammonium dihydrogen phosphate, and the temperature of aftertreatment fluid is 70 ± 5 ℃, and the time is 60 seconds; The temperature of described oven dry is 325 ± 25 ℃, and the time is 30 seconds.Specific volume through aluminium foil after the above-mentioned PROCESS FOR TREATMENT is 350～430 μ F/cm
2
The embodiment of the invention one: a kind of aluminium electrolytic capacitor cathode foil is made processing method, and its technological process is: pre-treatment → washing → corrosion → washing → burning sheet → washing → middle processing → washing → post processing → oven dry.The aluminium foil that adopts is the purity 〉=9.7% aluminium foil of domestic 50um, and its specific volume before middle processing is 1000 μ F/cm
2This technology is to increase paillon foil is burnt the sheet processing behind former corrosion process, and paillon foil carries out middle processing, reprocessing through burning after sheet is handled again.Processing, post processing in the pre-treatment of this technology, the burn into, dry each operation process conditions and Comparative Examples in processing, post processing in the pre-treatment, burn into, to dry each operation identical.Burn the sheet processing and carry out in oven heat, its temperature is 400 ℃, and the time is 60 seconds.Process through the burning sheet, meeting forms layer oxide film on the anode foil surface, and the surface hole defect pattern that anode foil has just eroded away is solidified, the surface breakdown of anticathode paper tinsel when processing in the minimizing, thereby specific volume and the surface quality of raising anode foil.Anode foil is carried out the middle processing identical with Comparative Examples after burning the sheet processing through this again, and the specific volume of anode foil reaches 400～600 μ F/cm after the middle processing
2Can find, increase the specific volume that burns sheet processing back anode foil and improved more than 20%.
The embodiment of the invention two: be to adopt another kind of aluminium electrolytic capacitor cathode foil to make processing method, technological process is: process → washing → burn sheet → washing → middle processing → washing → post processing → oven dry in pre-treatment → washing → corrosion → washing → preparation.As can be seen, this technology is on embodiment one basis, burns to increase before the sheet operation behind corrosion process and handles during paillon foil prepared, and paillon foil is handled in preparation and burnt and carry out middle processing, reprocessing again after sheet is handled.It is the HNO of 0.5mol/L that the treatment fluid of processing in the preparation adopts concentration
3Solution, the processing time of processing in the preparation is 30 seconds, temperature is 30 ℃.Handling in the preparation is before burning sheet aluminium foil slightly to be handled, and can wash the Heisui River and the hydrated aluminum film of aluminium foil surface off, makes in the burning sheet processing after a while surperficial copper, the too much situation of chloride ion content can not take place.Burn the sheet processing and carry out in oven heat, its temperature is 400 ℃, and the time is 60 seconds.Through processing in the preparation and burning sheet and process, the specific volume of anode foil after middle processing reaches 500～600 μ F/cm
2
Following table is the anode foil bulking value that obtains after anode foil process Comparative Examples, embodiment 1, embodiment 2 processing methods.
| Sample | Whether burning sheet processes | 0V specific volume (μ F/cm 2) | Surface copper content (mg/m 2) | Surface quality |
| Comparative Examples | No | 380 | 35 | More black powder is arranged |
| Embodiment 1 | Be | 500 | 15 | Few black powder is arranged |
| Embodiment 2 | Be | 550 | 10 | Few black powder is arranged |
By last table contrast as can be seen, anode foil can improve specific volume after the burning sheet is handled.And surface quality also improves a lot.
Claims (3)
1. Aluminium Electrolytic Capacitor Negative Pole Foil Manufacturing Approach, comprise in the burn into and handling and reprocessing, it is characterized in that: earlier paillon foil is burnt sheet in described corrosion back and handle, paillon foil after described burning sheet is handled, carry out again described in processing and reprocessing, the treatment temperature of paillon foil being burnt the sheet processing is 300～550 ℃, and the time is 30～80 seconds.
2. Aluminium Electrolytic Capacitor Negative Pole Foil Manufacturing Approach as claimed in claim 1 is characterized in that: the treatment temperature of paillon foil being burnt the sheet processing is 380～430 ℃, and the time is 45～60 seconds.
3. Aluminium Electrolytic Capacitor Negative Pole Foil Manufacturing Approach as claimed in claim 1 is characterized in that: process in earlier paillon foil being prepared after described corrosion, the treatment fluid of processing in the described preparation is that concentration is the HNO of 0.5～0.9mol/L
3Solution, the treatment temperature of processing in the described preparation are 28～35 ℃, and the time is 25～50 seconds.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNB031398278A CN1301519C (en) | 2003-07-09 | 2003-07-09 | Method for mfg negative electrode foil of aluminium electrolytic capacitor |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNB031398278A CN1301519C (en) | 2003-07-09 | 2003-07-09 | Method for mfg negative electrode foil of aluminium electrolytic capacitor |
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| CN1484260A CN1484260A (en) | 2004-03-24 |
| CN1301519C true CN1301519C (en) | 2007-02-21 |
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| CNB031398278A Expired - Fee Related CN1301519C (en) | 2003-07-09 | 2003-07-09 | Method for mfg negative electrode foil of aluminium electrolytic capacitor |
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Families Citing this family (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN100385586C (en) * | 2005-04-05 | 2008-04-30 | 江苏中联科技集团有限公司 | Process for preparing high voltage long life electrode foil for aluminum electrolytic capacitors |
| CN101101817B (en) * | 2006-12-22 | 2010-05-12 | 东莞市东阳光电容器有限公司 | Electrolytic capacitor pure aluminium cathode foil anode oxidation production method |
| WO2008128432A1 (en) * | 2007-04-19 | 2008-10-30 | Jianxiong Zhu | A method of manufacturing an aluminium electrolytic capacitor |
| CN106783176A (en) * | 2016-12-16 | 2017-05-31 | 南通江海电容器股份有限公司 | Aluminium electrolutic capacitor |
| CN107130245A (en) * | 2017-03-21 | 2017-09-05 | 广东宇彤创业投资有限公司 | A kind of preparation method of perforated foil |
| CN109801789B (en) * | 2018-12-19 | 2020-06-23 | 乳源瑶族自治县东阳光化成箔有限公司 | Method for preparing medium-pressure corrosion foil by using two-section direct current power generation hole |
| CN110887779A (en) * | 2019-11-28 | 2020-03-17 | 新疆众和股份有限公司 | Method for detecting initial corrosion state of high-voltage anode aluminum foil |
| CN113611539B (en) * | 2021-07-13 | 2022-04-22 | 乳源县立东电子科技有限公司 | Low-voltage soft-state corrosion anode aluminum foil and preparation method and application thereof |
Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1277728A (en) * | 1998-12-03 | 2000-12-20 | 如碧空株式会社 | Electrolytic capacitor |
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Patent Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1277728A (en) * | 1998-12-03 | 2000-12-20 | 如碧空株式会社 | Electrolytic capacitor |
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Assignee: Dongguan Dongyangguang Capacity Co., Ltd. Assignor: Dongyang Actinic Foil Forming Co., Ltd., Shenzhen Contract fulfillment period: 2007.2.22 to 2013.2.22 contract change Contract record no.: 2008440000573 Denomination of invention: Method for mfg negative electrode foil of aluminium electrolytic capacitor Granted publication date: 20070221 License type: Exclusive license Record date: 20081222 |
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Free format text: EXCLUSIVE LICENSE; TIME LIMIT OF IMPLEMENTING CONTACT: 2007.2.22 TO 2013.2.22; CHANGE OF CONTRACT Name of requester: DONGGUAN CITY DONGYANGGUANG CAPACITOR CO., LTD. Effective date: 20081222 |
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