CN107123549A - A kind of pre-treating method for improving solid-state capacitor electrode aluminium foil specific volume - Google Patents
A kind of pre-treating method for improving solid-state capacitor electrode aluminium foil specific volume Download PDFInfo
- Publication number
- CN107123549A CN107123549A CN201710253878.XA CN201710253878A CN107123549A CN 107123549 A CN107123549 A CN 107123549A CN 201710253878 A CN201710253878 A CN 201710253878A CN 107123549 A CN107123549 A CN 107123549A
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- CN
- China
- Prior art keywords
- aluminium foil
- specific volume
- phosphoric acid
- state capacitor
- treating method
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- 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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Classifications
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01G—CAPACITORS; CAPACITORS, RECTIFIERS, DETECTORS, SWITCHING DEVICES OR LIGHT-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
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01G—CAPACITORS; CAPACITORS, RECTIFIERS, DETECTORS, SWITCHING DEVICES OR LIGHT-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
- H01G9/055—Etched foil electrodes
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01G—CAPACITORS; CAPACITORS, RECTIFIERS, DETECTORS, SWITCHING DEVICES OR LIGHT-SENSITIVE DEVICES, OF THE ELECTROLYTIC TYPE
- H01G9/00—Electrolytic capacitors, rectifiers, detectors, switching devices, light-sensitive or temperature-sensitive devices; Processes of their manufacture
- H01G9/15—Solid electrolytic capacitors
Abstract
The present invention provides a kind of method for improving solid-state capacitor specific volume of electrode foil, and 0.5wt%~1.2wt% Na3PO4 is added in being handled before phosphoric acid.Aluminium foil is placed in 50~90 DEG C of phosphoric acid mixed liquor, through reaction after a while, in aluminium foil surface formation Na2HPO4, allow aluminium foil surface greasy dirt, impurity, dirty spot dispel it is more thorough, so that more uniform, hole expansibility is improved aluminium foil in multiple reaming below, so as to reach the effect for improving specific volume.
Description
Technical field
The invention mainly relates to the process that the specific volume of solid-state capacitor electrode aluminium foil is improved.
Background technology
Since 1990s, solid-state aluminum electrolytic capacitor is specified by feat of high stability, long lifespan, low ESR and height
Ripple current turns into the main electric capacity industry of China.With the fast development of China's electronics, to the demand of capacitor also increasingly
Height, this also means that requirement to solid-state capacitor static capacity also more and more higher.It occurs in conventional raising method
Reduction in terms of him, such as mechanical strength.
The content of the invention
Goal of the invention：For above-mentioned problem and defect, the present invention proposes a kind of raising solid-state capacitor specific volume
Meanwhile, otherwise reduction is not had, so as to reach the solid-state capacitor electrode aluminium foil specific volume of raising truly
Pre-treating method.
Technical scheme：To achieve the above object of the invention, the present invention uses following technical scheme：One kind improves solid-state capacitor
With the pre-treating method of electrode aluminium foil specific volume, comprise the following steps：
Step 1: aluminium foil is immersed in the mixed liquor being made up of 1~2wt% phosphoric acid and 0.4~1.2wt% sodium phosphates,
Reacted at 50~90 DEG C after 80~160s, by washing；
Step 2: then that the aluminium foil feeding after washing is mixed containing 6~15wt% hydrochloric acid and 0.8~1.4wt% sulfuric acid
Close in liquid, at 20~50 DEG C, AC variable frequency corrosion is carried out in 20~40Hz frequency, etching time is 50~120s；
Step 3: will by phosphoric acid solution of the aluminium foil feeding containing 0.2~0.8wt% of AC variable frequency corrosion, 60~
50~120s is soaked at 90 DEG C, then repeat step two and three is at least one times；
Step 4: finally will aluminium foil immerse 5~16wt% aqueous sulfuric acid in, at 40~55 DEG C soak 80~
120s。
Preferably, in step one phosphoric acid concentration be 1.1wt%, phosphoric acid na concn be 0.6wt%, temperature be 85~
95 DEG C, the reaction time is 140~160s.
Beneficial effect：Compared with prior art, the etched foil that the present invention is obtained by improving pre-treating technology compares after being formed
Appearance is improved, mechanical strength is constant, it is adaptable to produce solid-state aluminum electrolytic capacitor.
Embodiment
With reference to specific embodiment, the present invention is furture elucidated, it should be understood that these embodiments are merely to illustrate the present invention
Rather than limitation the scope of the present invention, after the present invention has been read, various equivalences of the those skilled in the art to the present invention
The modification of form falls within the application appended claims limited range.
The raising solid-state capacitor of the present invention is as follows with the process of the pre-treating method of electrode aluminium foil specific volume：Aluminium foil is put
H3PO4 concentration 1wt%~2wt%, Na3PO4 concentration in 0.4wt%~1.2wt% mixed liquor, temperature 50~
90 DEG C, 80~160 seconds time；AC variable frequency corrosion：The mixing of corrosive liquid 6~15wt% hydrochloric acid, the sulfuric acid of 0.8~1.4wt ‰
Corroded in solution, multiple alternating corrosion of entering is handled with middle.20~50 DEG C of the temperature of AC variable frequency corrosion, frequency 20~
40HZ, time 50~120 seconds, frequency, temperature carry out multiple reaming to aluminium foil successively from high to low；Intermediate treatment：With 0.2~
0.8wt% phosphate aqueous solution immersion, 60~90 DEG C of temperature, 50~120 seconds time, with AC corrosion alternately；It is chemical clear
Wash：Aluminium foil after multiple reaming is put into 5~16wt% aqueous sulfuric acids 80~120 seconds, 40~55 DEG C of temperature.
Embodiment 1：Aluminium foil is placed on without any annex solution temperature is 80 DEG C, 80 in the pre-treatment that H3PO4 concentration is 2wt%
Second.
Embodiment 2：Aluminium foil is placed on into the concentration that temperature is 50 DEG C, H3PO4 concentration is 1.8wt%, Na3PO4 is
Reacted 86 seconds in 0.5wt% mixed liquor.
Embodiment 3：Aluminium foil is placed on into the concentration that temperature is 60 DEG C, H3PO4 concentration is 1.5wt%, Na3PO4 is
Reacted 98 seconds in 0.8wt% mixed liquor.
Embodiment 4：Aluminium foil is placed on into the concentration that temperature is 70 DEG C, H3PO4 concentration is 1.4wt%, Na3PO4 is
Reacted 120 seconds in 1.0wt% mixed liquor.
Embodiment 5：It is 0.9 that aluminium foil is placed on into the concentration that temperature is 80 DEG C, H3PO4 concentration is 1.2wt%, Na3PO4
Reacted 144 seconds in wt% mixed liquor.
Embodiment 6：Aluminium foil is placed on into the concentration that temperature is 90 DEG C, H3PO4 concentration is 1.1wt%, Na3PO4 is
Reacted 152 seconds in 0.6wt% mixed liquor.
As seen from the table, without ratio of the specific volume relative to the aluminium foil by improving pre-treatment for the aluminium foil for improving pre-treatment
Appearance is relatively low, and the surface of pre-treatment aluminium foil after improvement can form Na2HPO4, allow greasy dirt, impurity, the dirty spot of aluminium foil surface to dispel
It is more thorough so that aluminium foil more uniform, hole expansibility in multiple reaming below is improved, and specific volume is improved so as to reach
Effect.
Claims (2)
1. a kind of pre-treating method for improving solid-state capacitor electrode aluminium foil specific volume, it is characterised in that comprise the following steps：
Step 1: aluminium foil is immersed in the mixed liquor that is made up of 1~2wt% phosphoric acid and 0.4~1.2wt% sodium phosphates, 50~
Reacted at 90 DEG C after 80~160s, by washing；
Step 2: the aluminium foil after washing then is sent into the mixed liquor containing 6~15wt% hydrochloric acid and 0.8~1.4wt% sulfuric acid
In, at 20~50 DEG C, AC variable frequency corrosion is carried out in 20~40Hz frequency, etching time is 50~120s；
Step 3: the aluminium foil feeding by AC variable frequency corrosion is contained in 0.2~0.8wt% phosphoric acid solution, at 60~90 DEG C
50~120s of lower immersion, then repeat step two and three is at least one times；
Step 4: last immerse aluminium foil in 5~16wt% aqueous sulfuric acid, 80~120s is soaked at 40~55 DEG C.
2. the pre-treating method of solid-state capacitor electrode aluminium foil specific volume is improved according to claim 1, it is characterised in that：Step
In rapid one phosphoric acid concentration be 1.1wt%, phosphoric acid na concn be 0.6wt%, temperature be 85~95 DEG C, the reaction time be 140~
160s。
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710253878.XA CN107123549A (en) | 2017-04-18 | 2017-04-18 | A kind of pre-treating method for improving solid-state capacitor electrode aluminium foil specific volume |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710253878.XA CN107123549A (en) | 2017-04-18 | 2017-04-18 | A kind of pre-treating method for improving solid-state capacitor electrode aluminium foil specific volume |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN107123549A true CN107123549A (en) | 2017-09-01 |
Family
ID=59725745
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201710253878.XA Pending CN107123549A (en) | 2017-04-18 | 2017-04-18 | A kind of pre-treating method for improving solid-state capacitor electrode aluminium foil specific volume |
Country Status (1)
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110438554A (en) * | 2019-07-26 | 2019-11-12 | 乳源瑶族自治县东阳光化成箔有限公司 | A kind of preprocess method mentioning high pressure etched foil specific volume and its middle pressure etched foil of preparation |
Citations (7)
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|---|---|---|---|---|
| CN101029411A (en) * | 2006-12-19 | 2007-09-05 | 东莞市东阳光电容器有限公司 | Electrochemical corrosive process of anode aluminum foil |
| CN101211697A (en) * | 2006-12-30 | 2008-07-02 | 新疆众和股份有限公司 | Electrolytic capacitor aluminum foil oxidation film stripping liquid and microscopic appearance measurement method |
| CN101275269A (en) * | 2008-04-22 | 2008-10-01 | 日丰（清远）电子有限公司 | Etching process for aluminum foil for electrolytic capacitor |
| CN103928237A (en) * | 2014-04-25 | 2014-07-16 | 南京工业大学 | Chambering technology of medium and high voltage aluminum electrolytic capacitor anode foil |
| CN104078241A (en) * | 2014-07-07 | 2014-10-01 | 南通南辉电子材料股份有限公司 | Electrode foil expansion face corrosion method for alternating-current motor starting capacitor |
| CN105350064A (en) * | 2015-12-03 | 2016-02-24 | 扬州宏远电子有限公司 | Corrosion process method of anode foil for solid aluminum electrolytic capacitor |
| CN106409514A (en) * | 2015-08-01 | 2017-02-15 | 东莞东阳光科研发有限公司 | Corrosion method for ultra-high-voltage and high-specific-capacity positive electrode corrosion foil |
-
2017
- 2017-04-18 CN CN201710253878.XA patent/CN107123549A/en active Pending
Patent Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101029411A (en) * | 2006-12-19 | 2007-09-05 | 东莞市东阳光电容器有限公司 | Electrochemical corrosive process of anode aluminum foil |
| CN101211697A (en) * | 2006-12-30 | 2008-07-02 | 新疆众和股份有限公司 | Electrolytic capacitor aluminum foil oxidation film stripping liquid and microscopic appearance measurement method |
| CN101275269A (en) * | 2008-04-22 | 2008-10-01 | 日丰（清远）电子有限公司 | Etching process for aluminum foil for electrolytic capacitor |
| CN103928237A (en) * | 2014-04-25 | 2014-07-16 | 南京工业大学 | Chambering technology of medium and high voltage aluminum electrolytic capacitor anode foil |
| CN104078241A (en) * | 2014-07-07 | 2014-10-01 | 南通南辉电子材料股份有限公司 | Electrode foil expansion face corrosion method for alternating-current motor starting capacitor |
| CN106409514A (en) * | 2015-08-01 | 2017-02-15 | 东莞东阳光科研发有限公司 | Corrosion method for ultra-high-voltage and high-specific-capacity positive electrode corrosion foil |
| CN105350064A (en) * | 2015-12-03 | 2016-02-24 | 扬州宏远电子有限公司 | Corrosion process method of anode foil for solid aluminum electrolytic capacitor |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110438554A (en) * | 2019-07-26 | 2019-11-12 | 乳源瑶族自治县东阳光化成箔有限公司 | A kind of preprocess method mentioning high pressure etched foil specific volume and its middle pressure etched foil of preparation |
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Application publication date: 20170901 |
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