CN107342164A - A kind of processing method of chip type aluminum electrode foil for capacitor - Google Patents
A kind of processing method of chip type aluminum electrode foil for capacitor Download PDFInfo
- Publication number
- CN107342164A CN107342164A CN201710549446.3A CN201710549446A CN107342164A CN 107342164 A CN107342164 A CN 107342164A CN 201710549446 A CN201710549446 A CN 201710549446A CN 107342164 A CN107342164 A CN 107342164A
- Authority
- CN
- China
- Prior art keywords
- chip type
- aqueous solution
- electrode foil
- processing method
- type aluminum
- 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.)
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- 239000011888 foil Substances 0.000 title claims abstract description 20
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 title claims abstract description 18
- 229910052782 aluminium Inorganic materials 0.000 title claims abstract description 18
- 239000003990 capacitor Substances 0.000 title claims abstract description 17
- 238000003672 processing method Methods 0.000 title claims abstract description 13
- 239000005030 aluminium foil Substances 0.000 claims abstract description 29
- 239000007864 aqueous solution Substances 0.000 claims abstract description 28
- QAOWNCQODCNURD-UHFFFAOYSA-N Sulfuric acid Chemical compound OS(O)(=O)=O QAOWNCQODCNURD-UHFFFAOYSA-N 0.000 claims abstract description 26
- 238000005406 washing Methods 0.000 claims abstract description 14
- DIZPMCHEQGEION-UHFFFAOYSA-H aluminium sulfate (anhydrous) Chemical compound [Al+3].[Al+3].[O-]S([O-])(=O)=O.[O-]S([O-])(=O)=O.[O-]S([O-])(=O)=O DIZPMCHEQGEION-UHFFFAOYSA-H 0.000 claims abstract description 13
- GSEJCLTVZPLZKY-UHFFFAOYSA-N Triethanolamine Chemical compound OCCN(CCO)CCO GSEJCLTVZPLZKY-UHFFFAOYSA-N 0.000 claims abstract description 9
- 238000002203 pretreatment Methods 0.000 claims abstract description 8
- 238000002604 ultrasonography Methods 0.000 claims abstract description 7
- 238000012805 post-processing Methods 0.000 claims abstract description 6
- 238000002791 soaking Methods 0.000 claims abstract description 6
- BJZIJOLEWHWTJO-UHFFFAOYSA-H dipotassium;hexafluorozirconium(2-) Chemical group [F-].[F-].[F-].[F-].[F-].[F-].[K+].[K+].[Zr+4] BJZIJOLEWHWTJO-UHFFFAOYSA-H 0.000 claims description 6
- 239000000463 material Substances 0.000 claims description 3
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 claims description 2
- 229910052760 oxygen Inorganic materials 0.000 claims description 2
- 239000001301 oxygen Substances 0.000 claims description 2
- 238000000151 deposition Methods 0.000 claims 1
- 238000001035 drying Methods 0.000 claims 1
- 230000003628 erosive effect Effects 0.000 claims 1
- 238000002386 leaching Methods 0.000 claims 1
- 238000005260 corrosion Methods 0.000 abstract description 13
- 230000007797 corrosion Effects 0.000 abstract description 13
- 238000000034 method Methods 0.000 abstract description 9
- NBIIXXVUZAFLBC-UHFFFAOYSA-N Phosphoric acid Chemical compound OP(O)(O)=O NBIIXXVUZAFLBC-UHFFFAOYSA-N 0.000 description 14
- VEXZGXHMUGYJMC-UHFFFAOYSA-N Hydrochloric acid Chemical compound Cl VEXZGXHMUGYJMC-UHFFFAOYSA-N 0.000 description 12
- 229910000147 aluminium phosphate Inorganic materials 0.000 description 7
- 238000002360 preparation method Methods 0.000 description 4
- 238000012545 processing Methods 0.000 description 4
- 239000011259 mixed solution Substances 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- GRYLNZFGIOXLOG-UHFFFAOYSA-N Nitric acid Chemical compound O[N+]([O-])=O GRYLNZFGIOXLOG-UHFFFAOYSA-N 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000006243 chemical reaction Methods 0.000 description 1
- 238000007654 immersion Methods 0.000 description 1
- 229910017604 nitric acid Inorganic materials 0.000 description 1
- 238000004062 sedimentation Methods 0.000 description 1
- 239000007787 solid Substances 0.000 description 1
- 239000000243 solution Substances 0.000 description 1
- 239000000126 substance Substances 0.000 description 1
Classifications
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01G—CAPACITORS; CAPACITORS, RECTIFIERS, DETECTORS, SWITCHING DEVICES, LIGHT-SENSITIVE OR TEMPERATURE-SENSITIVE DEVICES OF THE ELECTROLYTIC TYPE
- H01G4/00—Fixed capacitors; Processes of their manufacture
- H01G4/002—Details
- H01G4/005—Electrodes
Landscapes
- Engineering & Computer Science (AREA)
- Power Engineering (AREA)
- Manufacturing & Machinery (AREA)
- Microelectronics & Electronic Packaging (AREA)
- Chemical Treatment Of Metals (AREA)
Abstract
It is the invention discloses a kind of processing method of chip type aluminum electrode foil for capacitor, including the step of pre-treatment, an AC corrosion, intermediate treatment, anticaustic, post processing, the step of the post processing：Aluminium foil after anticaustic is placed on containing being soaked in sulfuric acid and aluminum sulfate mixed aqueous solution after washing, it is placed on again containing being soaked in the triethanolamine aqueous solution, above-mentioned be immersed under ultrasound condition is carried out, then the aluminium foil after soaking takes out, after washing, one layer of oxygen-proof film is coated on its surface, is then dried.It is small that the electrode foil obtained by the above method forms rear leakage current, suitable for producing solid-state aluminum electrolytic capacitor.
Description
Technical field
The invention belongs to electrode foil processing technique field, and in particular to a kind of processing of chip type aluminum electrode foil for capacitor
Method.
Background technology
At present, the processing method of chip type aluminum electrode foil for capacitor is produced with aluminum electric pole foil, typically by purity
99.99% aluminium foil once corrodes, intermediate treatment, anticaustic, then totally dried with being washed after nitric acid or phosphoric acid dip through pre-treatment
It is dry.Leakage current is larger after continuing chemical conversion after but, and this makes to make solid-state aluminum electrolytic capacitor easily dry Gu failures too early.
The content of the invention
It is an object of the invention to provide a kind of processing method of chip type aluminum electrode foil for capacitor, to reduce solid capacitor
Device electrode foil current-leakage.
To achieve the above object, the technical solution adopted by the present invention is：
A kind of processing method of chip type aluminum electrode foil for capacitor, including pre-treatment, AC corrosion, a middle
The step of reason, anticaustic, post processing, it is the step of the post processing：Aluminium foil after anticaustic is placed on after washing and contained
Have in sulfuric acid and aluminum sulfate mixed aqueous solution and soak, then be placed on containing being soaked in the triethanolamine aqueous solution, it is above-mentioned to be immersed in ultrasound
Under the conditions of carry out, then soak after aluminium foil take out, after washing, its surface coat one layer of oxygen-proof film, then dry.
The material of the oxygen-proof film is potassium fluorozirconate.
Oxygen-proof film is prepared in aluminium foil surface by sedimentation.
It is described containing in sulfuric acid and aluminum sulfate mixed aqueous solution, the concentration of sulfuric acid is 1~10wt%.
It is described containing in sulfuric acid and aluminum sulfate mixed aqueous solution, the concentration of aluminum sulfate is 0.02~2wt%.
In the triethanolamine aqueous solution, the concentration of triethanolamine is 1~25wt%.
Beneficial effect：It is small that the electrode foil obtained by the above method forms rear leakage current, suitable for producing chip type electric capacity
Device aluminum electric pole foil.
Embodiment
The processing method of the chip type aluminum electrode foil for capacitor of the present invention, comprises the following steps：
(1) pre-treatment
Aluminium foil is placed on 25~85 DEG C of temperature, soaked 50~350 seconds in the aqueous solution containing 0.1~10wt% phosphoric acid；
(2) AC corrosions
Aluminium foil after pre-treatment is placed on to the mixed solution containing 2~20wt% hydrochloric acid and the alchlors of 0.2~20wt ‰
Middle carry out AC corrosion, corrosion temperature is 18~55 DEG C, current density is 5~50A/dm2, corrode 10~80 seconds；
(3) intermediate treatment
Aluminium foil after AC corrosion is placed on temperature as 25~90 DEG C, containing 0.5~10wt% phosphoric acid and containing 5~
Soaked 50~350 seconds in the aqueous solution of 30wt% hydrochloric acid；
(4) secondary AC corrodes
Aluminium foil after middle processing is subjected to multistage reaming corrosion, temperature is placed on as 10~50 DEG C, contains 0.5~10wt% phosphoric acid
Carried out with power-up stream in the aqueous solution containing 5~30wt% hydrochloric acid.Current density is 5~50A/dm2, corrosion 1000~2000
Second；
(5) post-process
Aluminium foil after anticaustic is placed on temperature as 20~80 DEG C after washing, containing 1~10wt% sulfuric acid and 0.2~
Soaked 50~350 seconds in the aluminum sulfate mixed aqueous solutions of 20wt ‰, then be placed on temperature as 20~80 DEG C, contain the second of 1~25wt% tri-
Soaked 50~350 seconds in aqueous alkanolamine, above-mentioned be immersed under ultrasound condition is carried out, and the aluminium foil after then soaking takes out, washing
Afterwards, one layer of oxygen-proof film is coated on its surface, is then dried 50~350 seconds at 150-500 DEG C.
Wherein, the preparation method of oxygen-proof film is：The oversaturated potassium fluorozirconate aqueous solution is prepared, and is heated to 100 DEG C,
Aluminium foil surface deposits 2-5 minutes.
Below according to specific embodiment, the present invention will be further described.According to following embodiments, can be better understood from
The present invention.However, as it will be easily appreciated by one skilled in the art that specific material proportion, process conditions described by embodiment and
Its result is merely to illustrate the present invention, without should be also without limitation on the present invention described in detail in claims.
Embodiment 1
(1) pre-treatment
Aluminium foil is placed on temperature 60 C, soaked 300 seconds in the aqueous solution containing 10wt% phosphoric acid；
(2) AC corrosions
Aluminium foil after pre-treatment is placed in the mixed solution containing 10wt% hydrochloric acid and the alchlors of 10wt ‰ and handed over
Stream corrosion, corrosion temperature is 30 DEG C, current density 25A/dm2, corrode 45 seconds；
(3) intermediate treatment
Aluminium foil after AC corrosion is placed on temperature as 60 DEG C, containing 7.5wt% phosphoric acid and contains 15wt% hydrochloric acid
The aqueous solution in soak 200 seconds；
(4) secondary AC corrodes
Aluminium foil after middle processing is subjected to multistage reaming corrosion, temperature is placed on as 30 DEG C, containing 8wt% phosphoric acid and contains
Power-up stream is carried out in the aqueous solution of 10wt% hydrochloric acid.Current density is 25A/dm2, corrode 2000 seconds；
(5) post-process
Aluminium foil after anticaustic is placed on temperature as 60 DEG C after washing, contains 10wt% sulfuric acid and the aluminum sulfate of 10wt ‰
Soaked 100 seconds in mixed aqueous solution, then be placed on temperature as 80 DEG C, containing being soaked 200 seconds in the 1wt% triethanolamine aqueous solution, on
To state to be immersed under ultrasound condition and carry out, the aluminium foil after then soaking is taken out, and after washing, one layer of oxygen-proof film is coated on its surface,
Then dried 50 seconds at 500 DEG C.
Wherein, the preparation method of oxygen-proof film is：The oversaturated potassium fluorozirconate aqueous solution is prepared, and is heated to 100 DEG C,
Aluminium foil surface deposits 5 minutes.
Embodiment 2
Step (1)~(4) are the same as embodiment 1
(5) post-process the step of be：
Aluminium foil after anticaustic is placed on temperature as 20 DEG C after washing, contains 1wt% sulfuric acid and the aluminum sulfate of 20wt ‰
Soaked 350 seconds in mixed aqueous solution, then be placed on temperature as 60 DEG C, contain immersion 50~350 in the 25wt% triethanolamine aqueous solution
Second, above-mentioned be immersed under ultrasound condition is carried out, and the aluminium foil after then soaking takes out, and after washing, one layer of oxygen is coated on its surface
Change film, then dried 200 seconds at 300 DEG C.
Wherein, the preparation method of oxygen-proof film is：The oversaturated potassium fluorozirconate aqueous solution is prepared, and is heated to 100 DEG C,
Aluminium foil surface deposits 2 minutes.
Embodiment 3
Step (1)~(4) are the same as embodiment 1
(5) post-process the step of be：
Aluminium foil after anticaustic is placed on temperature as 80 DEG C after washing, contains 6wt% sulfuric acid and the aluminum sulfate of 0.2wt ‰
Soaked 50 seconds in mixed aqueous solution, then be placed on temperature as 20 DEG C, containing being soaked 350 seconds in the 15wt% triethanolamine aqueous solution, on
To state to be immersed under ultrasound condition and carry out, the aluminium foil after then soaking is taken out, and after washing, one layer of oxygen-proof film is coated on its surface,
Then dried 350 seconds at 150 DEG C.
Wherein, the preparation method of oxygen-proof film is：The oversaturated potassium fluorozirconate aqueous solution is prepared, and is heated to 100 DEG C,
Aluminium foil surface deposits 3 minutes.
Described above is only the preferred embodiment of the present invention, it is noted that for the ordinary skill people of the art
For member, under the premise without departing from the principles of the invention, some improvements and modifications can also be made, these improvements and modifications also should
It is considered as protection scope of the present invention.
Claims (6)
- A kind of 1. processing method of chip type aluminum electrode foil for capacitor, it is characterised in that：Including pre-treatment, once exchange corruption The step of erosion, intermediate treatment, anticaustic, post processing, it is the step of the post processing：By the aluminium foil after anticaustic through washing After be placed on containing being soaked in sulfuric acid and aluminum sulfate mixed aqueous solution, then be placed on containing being soaked in the triethanolamine aqueous solution, above-mentioned leaching Bubble is carried out under ultrasound condition, and the aluminium foil after then soaking takes out, and after washing, coats one layer of oxygen-proof film on its surface, then Drying.
- 2. the processing method of chip type aluminum electrode foil for capacitor according to claim 1, it is characterised in that：The oxygen The material for changing film is potassium fluorozirconate.
- 3. the processing method of chip type aluminum electrode foil for capacitor according to claim 1, it is characterised in that：Pass through deposition Method prepares oxygen-proof film in aluminium foil surface.
- 4. the processing method of chip type aluminum electrode foil for capacitor according to claim 1, it is characterised in that：It is described containing In sulfuric acid and aluminum sulfate mixed aqueous solution, the concentration of sulfuric acid is 1~10wt%.
- 5. the processing method of chip type aluminum electrode foil for capacitor according to claim 1, it is characterised in that：It is described containing In sulfuric acid and aluminum sulfate mixed aqueous solution, the concentration of aluminum sulfate is 0.02~2wt%.
- 6. the processing method of chip type aluminum electrode foil for capacitor according to claim 1, it is characterised in that：Three second In aqueous alkanolamine, the concentration of triethanolamine is 1~25wt%.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710549446.3A CN107342164A (en) | 2017-07-07 | 2017-07-07 | A kind of processing method of chip type aluminum electrode foil for capacitor |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710549446.3A CN107342164A (en) | 2017-07-07 | 2017-07-07 | A kind of processing method of chip type aluminum electrode foil for capacitor |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN107342164A true CN107342164A (en) | 2017-11-10 |
Family
ID=60219698
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201710549446.3A Pending CN107342164A (en) | 2017-07-07 | 2017-07-07 | A kind of processing method of chip type aluminum electrode foil for capacitor |
Country Status (1)
| Country | Link |
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| CN (1) | CN107342164A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2020073190A1 (en) * | 2018-10-09 | 2020-04-16 | 丰宾电子（深圳）有限公司 | Hybrid aluminum electrolytic capacitor and fabrication method therefor |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2003002783A2 (en) * | 2001-06-27 | 2003-01-09 | Epcos Ag | Method for treating aluminium films for electrochemical capacitors |
| CN1967752A (en) * | 2006-11-06 | 2007-05-23 | 乳源瑶族自治县东阳光化成箔有限公司 | A low-voltage anode foil used for aluminium electrolytic capacitor and its manufacturing method |
| CN101093751A (en) * | 2006-11-17 | 2007-12-26 | 深圳清华大学研究院 | Method for preparing foil of cathode with high specific volume |
| CN101609747A (en) * | 2009-07-07 | 2009-12-23 | 吴江飞乐天和电子材料有限公司 | Production method of super capacitor electrode foil |
| CN105033225A (en) * | 2015-06-26 | 2015-11-11 | 东南大学 | Low-pressure core filling preparation technology of copper-clad aluminum composite material |
-
2017
- 2017-07-07 CN CN201710549446.3A patent/CN107342164A/en active Pending
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2003002783A2 (en) * | 2001-06-27 | 2003-01-09 | Epcos Ag | Method for treating aluminium films for electrochemical capacitors |
| CN1967752A (en) * | 2006-11-06 | 2007-05-23 | 乳源瑶族自治县东阳光化成箔有限公司 | A low-voltage anode foil used for aluminium electrolytic capacitor and its manufacturing method |
| CN101093751A (en) * | 2006-11-17 | 2007-12-26 | 深圳清华大学研究院 | Method for preparing foil of cathode with high specific volume |
| CN101609747A (en) * | 2009-07-07 | 2009-12-23 | 吴江飞乐天和电子材料有限公司 | Production method of super capacitor electrode foil |
| CN105033225A (en) * | 2015-06-26 | 2015-11-11 | 东南大学 | Low-pressure core filling preparation technology of copper-clad aluminum composite material |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2020073190A1 (en) * | 2018-10-09 | 2020-04-16 | 丰宾电子（深圳）有限公司 | Hybrid aluminum electrolytic capacitor and fabrication method therefor |
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| RJ01 | Rejection of invention patent application after publication |
Application publication date: 20171110 |
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