CN103177878A - Method for forming extra high voltage anode foil - Google Patents
Method for forming extra high voltage anode foil Download PDFInfo
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- CN103177878A CN103177878A CN201110441653XA CN201110441653A CN103177878A CN 103177878 A CN103177878 A CN 103177878A CN 201110441653X A CN201110441653X A CN 201110441653XA CN 201110441653 A CN201110441653 A CN 201110441653A CN 103177878 A CN103177878 A CN 103177878A
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- high voltage
- superhigh pressure
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- anode foils
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Abstract
Disclosed is a method for forming extra high voltage anode foil. Extra high voltage etched foil is placed in steam of 130-150 DEG C for 5-20 minutes, the extra high voltage etched foil is taken out and placed in a diammonium hydrogen citrate solution of 0.2-1.0wt% for 1-5 minutes, and the extra high voltage etched foil is taken out and subjected to sequent processing. By the aid of the method, the formed anode foil is stable in performance, the voltage rising time is less than 200 seconds, and the drain current of products is less than 25 mu A/cm2.
Description
Technical field
The present invention relates to the formation method of aluminum electrolysis capacitor anode foil, particularly a kind of extra-high voltage anode foil formation method.
Background technology
Along with the generally use of high-grade household electrical appliance and the fast development of electronics industry, the application of aluminium electrolytic capacitor is more and more extensive, and especially the demand of ultra-high voltage aluminum electrolytic capacitor is more and more vigorous.Raw material anode foils voltage request for the manufacture of the ultra-high voltage aluminum electrolytic capacitor is also more and more higher, and present product voltage is the highest only has the 700V left and right, and more than ultra-high voltage aluminum electrolytic capacitor voltage request 750V.
Present routine formation method is: with etched foil carry out that high temperature poach, one-level change into, high-temperature roasting, secondary change into, phosphatization is processed, change into, dry.Formation method routinely is difficult to produce needs-satisfying products, is mainly that the paper tinsel sample is long pressure rising time, and the product leakage current characteristic is poor.
Summary of the invention
The purpose of this invention is to provide a kind of extra-high voltage anode foil formation method, adopt the method can make formed anode foils stable performance, pressure rising time, the product leakage current was less than 25 μ A/cm less than 200s
2
The present invention achieves the above object by the following technical programs: a kind of extra-high voltage anode foil formation method: comprise the following steps:
(1) with superhigh pressure etched foil standing 5～20min in the steam of 130～150 ℃; The use high-temperature water vapor is processed, and be conducive to the diaspore rete and generate fast, and the diaspore rete can provide corrosion protection, shortens formation time, improve the anode foils quality before and after forming.
(2) will be placed on through the superhigh pressure etched foil of steam treatment in 60～80 ℃ of diammonium hydrogen citrate solution that contain 0.2～1.0wt% and soak 1～5min; Use diammonium hydrogen citrate solution to do middle processing, can dissolve unbodied aluminium hydroxide, simultaneously at etched foil Surface Creation diammonium hydrogen citrate solution rete, be conducive to follow-up formation and carry out.
The superhigh pressure etched foil that (3) will soak in diammonium hydrogen citrate solution is placed on the superhigh pressure of 90 ℃ and forms in liquid, with 100mA/cm
2Add electric forming 50～60min, obtain the one-level anode foils;
(4) the one-level anode foils is calcined 3min under 520 ℃ of conditions;
(5) anode foils after calcining is placed on the superhigh pressure of 90 ℃ and forms in liquid, with 100mA/cm
2Add electric forming 30～40min, obtain the secondary anode foils;
(6) the secondary anode foils is placed on standing 2～4min in the phosphoric acid liquid of 60 ℃;
(7) will be placed on through the secondary anode paper tinsel that phosphoric acid liquid was processed the superhigh pressure of 90 ℃ forms in liquid, with 50mA/cm
2Add electric forming 20～30min; Take out at last 100 ℃ of oven dry and obtain extra-high voltage anode foil.
Outstanding advantages of the present invention is:
Adopt the method can make formed anode foils stable performance, pressure rising time, the product leakage current was less than 25 μ A/cm less than 200s
2
Embodiment
By the following examples technical scheme of the present invention is further described.
Embodiment 1
The present embodiment describes extra-high voltage anode foil formation method of the present invention in detail to form the 750Vf product as example, comprises the following steps:
1, with superhigh pressure etched foil standing 5min in the steam of 130 ℃;
2, will be placed on through the superhigh pressure etched foil of steam treatment in 60～80 ℃ of diammonium hydrogen citrate solution that contain 0.2wt% and soak 1min;
3, will be placed on through the superhigh pressure etched foil that the diammonium hydrogen citrate solution-treated is crossed the superhigh pressure of 90 ℃ forms in liquid, with 100mA/cm
2Power up 750V and form 50min, obtain the one-level anode foils;
4, the one-level anode foils is calcined 3min under 520 ℃ of conditions;
5, the one-level anode foils after calcining is placed on the superhigh pressure of 90 ℃ and forms in liquid, with 100mA/cm
2Power up 750V and form 30min, obtain the secondary anode foils;
6, the secondary anode foils is placed on standing 2min in the phosphoric acid liquid of 60 ℃;
7, will be placed on through the secondary anode foils that phosphoric acid liquid is processed the superhigh pressure of 90 ℃ forms in liquid, with 50mA/cm
2Power up 750V and form 20min; Take out at last 100 ℃ of oven dry and obtain extra-high voltage anode foil.
The paper tinsel sample after testing, withstand voltage 755V, pressure rising time 160～180s, leakage current 15～20 μ A/cm
2
Embodiment 2
The present embodiment describes extra-high voltage anode foil formation method of the present invention in detail to form the 850Vf product as example, comprises the following steps:
1, with superhigh pressure etched foil standing 15min in the steam of 140 ℃;
2, will be placed on through the superhigh pressure etched foil of steam treatment in 70 ℃ of diammonium hydrogen citrate solution that contain 0.5wt% and soak 3min;
3, will be placed on through the superhigh pressure etched foil that the diammonium hydrogen citrate solution-treated is crossed the superhigh pressure of 90 ℃ forms in liquid, with 100mA/cm
2Power up 850V and form 55min, obtain the one-level anode foils;
4, the one-level anode foils is calcined 3min under 520 ℃ of conditions;
5, the one-level anode foils after calcining is placed on the superhigh pressure of 90 ℃ and forms in liquid, with 100mA/cm
2Power up 850V and form 35min, obtain the secondary anode foils;
6, the secondary anode foils is placed on standing 3min in the phosphoric acid liquid of 60 ℃;
7, will be placed on through the secondary anode paper tinsel that phosphoric acid liquid was processed the superhigh pressure of 90 ℃ forms in liquid, with 50mA/cm
2Power up 850V and form 25min; Take out at last 100 ℃ of oven dry and obtain extra-high voltage anode foil.
The paper tinsel sample after testing, withstand voltage 850V, pressure rising time 170～180s, leakage current 18～20 μ A/cm
2
Embodiment 3
The present embodiment describes extra-high voltage anode foil formation method of the present invention in detail to form the 1000Vf product as example, comprises the following steps:
1, with superhigh pressure etched foil standing 20min in the steam of 150 ℃;
2, will be placed on through the superhigh pressure etched foil of steam treatment in 80 ℃ of diammonium hydrogen citrate solution that contain 1.0wt% and soak 5min;
3, will be placed on through the superhigh pressure etched foil that the diammonium hydrogen citrate solution-treated is crossed the superhigh pressure of 90 ℃ forms in liquid, with 100mA/cm
2Power up 1000V and form 60min, obtain the one-level anode foils;
4, the one-level anode foils is calcined 3min under 520 ℃ of conditions;
5, the one-level anode foils after calcining is placed on the superhigh pressure of 90 ℃ and forms in liquid, with 100mA/cm
2Power up 1000V and form 40min, obtain the secondary anode foils;
6, the secondary anode foils is placed on standing 4min in the phosphoric acid liquid of 60 ℃;
7, will be placed on the superhigh pressure of 90 ℃ through the acid-treated secondary anode foils of phosphorus forms in liquid, with 50mA/cm
2Power up 1000V and form 30min; Take out at last 100 ℃ of oven dry and obtain extra-high voltage anode foil.
The paper tinsel sample after testing, withstand voltage 1010V, pressure rising time 190～200s, leakage current 23～25 μ A/cm
2
Claims (1)
1. an extra-high voltage anode foil formation method, is characterized in that, comprises the following steps:
(1) with superhigh pressure etched foil standing 5～20min in the steam of 130～150 ℃;
(2) will be placed on through the superhigh pressure etched foil of steam treatment in 60～80 ℃ of diammonium hydrogen citrate solution that contain 0.2～1.0wt% and soak 1～5min;
The superhigh pressure etched foil that (3) will soak in diammonium hydrogen citrate solution is placed on the superhigh pressure of 90 ℃ and forms in liquid, with 100mA/cm
2Add electric forming 50～60min, obtain the one-level anode foils;
(4) the one-level anode foils is calcined 3min under 520 ℃ of conditions;
(5) anode foils after calcining is placed on the superhigh pressure of 90 ℃ and forms in liquid, with 100mA/cm
2Add electric forming 30～40min, obtain the secondary anode foils;
(6) the secondary anode foils is placed on standing 2～4min in the phosphoric acid liquid of 60 ℃;
(7) will be placed on through the secondary anode paper tinsel that phosphoric acid liquid was processed the superhigh pressure of 90 ℃ forms in liquid, with 50mA/cm
2Add electric forming 20～30min; Take out at last 100 ℃ of oven dry and obtain extra-high voltage anode foil.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201110441653.XA CN103177878B (en) | 2011-12-26 | 2011-12-26 | A kind of extra-high voltage anode foil formation method |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201110441653.XA CN103177878B (en) | 2011-12-26 | 2011-12-26 | A kind of extra-high voltage anode foil formation method |
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| CN103177878A true CN103177878A (en) | 2013-06-26 |
| CN103177878B CN103177878B (en) | 2016-02-10 |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107974701A (en) * | 2017-11-15 | 2018-05-01 | 广西贺州市桂东电子科技有限责任公司 | A kind of pre-treating method of anode aluminium foil chemical conversion |
Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101110298A (en) * | 2006-12-22 | 2008-01-23 | 东莞市东阳光电容器有限公司 | Method for manufacturing positive electrode aluminum foil of electrolytic capacitor |
| CN101777432A (en) * | 2010-03-23 | 2010-07-14 | 扬州宏远电子有限公司 | Forming process of anode foils for extra-high voltage aluminium electrolytic capacitors |
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2011
- 2011-12-26 CN CN201110441653.XA patent/CN103177878B/en active Active
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101110298A (en) * | 2006-12-22 | 2008-01-23 | 东莞市东阳光电容器有限公司 | Method for manufacturing positive electrode aluminum foil of electrolytic capacitor |
| CN101777432A (en) * | 2010-03-23 | 2010-07-14 | 扬州宏远电子有限公司 | Forming process of anode foils for extra-high voltage aluminium electrolytic capacitors |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107974701A (en) * | 2017-11-15 | 2018-05-01 | 广西贺州市桂东电子科技有限责任公司 | A kind of pre-treating method of anode aluminium foil chemical conversion |
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| CN103177878B (en) | 2016-02-10 |
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Effective date of registration: 20220728 Address after: 834034 no.18-032, Industrial Avenue, huyanghe Industrial Park, Xinjiang Uygur Autonomous Region Patentee after: Xinjiang guangtou Guidong Electronic Technology Co.,Ltd. Address before: 542800 No. 39, Jiangbei East Road, Hezhou, the Guangxi Zhuang Autonomous Region Patentee before: GUANGXI HEZHOU GUIDONG ELECTRONIC TECHNOLOGY Co.,Ltd. |