CN103177878B - A kind of extra-high voltage anode foil formation method - Google Patents
A kind of extra-high voltage anode foil formation method Download PDFInfo
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- CN103177878B CN103177878B CN201110441653.XA CN201110441653A CN103177878B CN 103177878 B CN103177878 B CN 103177878B CN 201110441653 A CN201110441653 A CN 201110441653A CN 103177878 B CN103177878 B CN 103177878B
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Abstract
A kind of extra-high voltage anode foil formation method, leaves standstill 5 ~ 20min by superhigh pressure etched foil in the steam of 130 ~ 150 DEG C; Take out and soak 1 ~ 5min in 60 ~ 80 DEG C of diammonium hydrogen citrate solution containing 0.2 ~ 1.0wt%; Follow-up formation processing is carried out in taking-up.Adopt the method can make formed anode foils stable performance, pressure rising time is less than 200s, and product leakage current is less than 25 μ A/cm
2.
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 fast development of generally use and the electronics industry of high-grade household electrical appliance, 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 ultra-high voltage aluminum electrolytic capacitor is also more and more higher, and current product voltage is the highest only has about 700V, and ultra-high voltage aluminum electrolytic capacitor more than voltage request 750V.
Current routine formation method is: etched foil carried out high temperature poach, one-level changes into, high-temperature roasting, secondary change into, phosphorating treatment, change into, dry.Formation method is difficult to produce needs-satisfying products routinely, and mainly paper tinsel sample is long for pressure rising time, and product leakage current characteristic is poor.
Summary of the invention
The object 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 is less than 200s, and product leakage current is less than 25 μ A/cm
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) superhigh pressure etched foil is left standstill 5 ~ 20min in the steam of 130 ~ 150 DEG C; Use high-temperature water vapor process, be conducive to diaspore rete and generate fast, and diaspore rete can provide corrosion protection, shortens formation time, improve anode foils quality before and after formation.
(2) the superhigh pressure etched foil through steam treatment is placed on 60 ~ 80 DEG C and soaks 1 ~ 5min containing in the diammonium hydrogen citrate solution of 0.2 ~ 1.0wt%; Use diammonium hydrogen citrate solution to do middle process, unbodied aluminium hydroxide can be dissolved, simultaneously at etched foil Surface Creation diammonium hydrogen citrate solution rete, be conducive to follow-up formation and carry out.
(3) superhigh pressure superhigh pressure etched foil soaked in diammonium hydrogen citrate solution being placed on 90 DEG C is formed in liquid, with 100mA/cm
2add electric forming 50 ~ 60min, obtain one-level anode foils;
(4) one-level anode foils is calcined 3min under 520 DEG C of conditions;
(5) superhigh pressure anode foils after calcining being placed on 90 DEG C is formed in liquid, with 100mA/cm
2add electric forming 30 ~ 40min, obtain secondary anode foils;
(6) secondary anode foils is placed in the phosphoric acid liquid of 60 DEG C and leaves standstill 2 ~ 4min;
(7) superhigh pressure secondary anode paper tinsel through phosphoric acid liquid process being placed on 90 DEG C is formed in liquid, with 50mA/cm
2add electric forming 20 ~ 30min; Finally take out 100 DEG C 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 is less than 200s, and product leakage current is less than 25 μ A/cm
2.
Embodiment
By the following examples technical scheme of the present invention is further described.
embodiment 1
The present embodiment, to form 750Vf product, describes extra-high voltage anode foil formation method of the present invention in detail, comprises the following steps:
1, superhigh pressure etched foil is left standstill 5min in the steam of 130 DEG C;
2, the superhigh pressure etched foil through steam treatment is placed on 60 ~ 80 DEG C and soaks 1min containing in the diammonium hydrogen citrate solution of 0.2wt%;
3, the superhigh pressure superhigh pressure etched foil crossed through diammonium hydrogen citrate solution-treated being placed on 90 DEG C is formed in liquid, with 100mA/cm
2power up 750V and form 50min, obtain one-level anode foils;
4, one-level anode foils is calcined 3min under 520 DEG C of conditions;
5, the superhigh pressure one-level anode foils after calcining being placed on 90 DEG C is formed in liquid, with 100mA/cm
2power up 750V and form 30min, obtain secondary anode foils;
6, secondary anode foils is placed in the phosphoric acid liquid of 60 DEG C and leaves standstill 2min;
7, the superhigh pressure secondary anode foils through phosphoric acid liquid process being placed on 90 DEG C is formed in liquid, with 50mA/cm
2power up 750V and form 20min; Finally take out 100 DEG C of oven dry and obtain extra-high voltage anode foil.
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, to form 850Vf product, describes extra-high voltage anode foil formation method of the present invention in detail, comprises the following steps:
1, superhigh pressure etched foil is left standstill 15min in the steam of 140 DEG C;
2, the superhigh pressure etched foil through steam treatment is placed on 70 DEG C and soaks 3min containing in the diammonium hydrogen citrate solution of 0.5wt%;
3, the superhigh pressure superhigh pressure etched foil crossed through diammonium hydrogen citrate solution-treated being placed on 90 DEG C is formed in liquid, with 100mA/cm
2power up 850V and form 55min, obtain one-level anode foils;
4, one-level anode foils is calcined 3min under 520 DEG C of conditions;
5, the superhigh pressure one-level anode foils after calcining being placed on 90 DEG C is formed in liquid, with 100mA/cm
2power up 850V and form 35min, obtain secondary anode foils;
6, secondary anode foils is placed in the phosphoric acid liquid of 60 DEG C and leaves standstill 3min;
7, the superhigh pressure secondary anode paper tinsel through phosphoric acid liquid process being placed on 90 DEG C is formed in liquid, with 50mA/cm
2power up 850V and form 25min; Finally take out 100 DEG C of oven dry and obtain extra-high voltage anode foil.
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, to form 1000Vf product, describes extra-high voltage anode foil formation method of the present invention in detail, comprises the following steps:
1, superhigh pressure etched foil is left standstill 20min in the steam of 150 DEG C;
2, the superhigh pressure etched foil through steam treatment is placed on 80 DEG C and soaks 5min containing in the diammonium hydrogen citrate solution of 1.0wt%;
3, the superhigh pressure superhigh pressure etched foil crossed through diammonium hydrogen citrate solution-treated being placed on 90 DEG C is formed in liquid, with 100mA/cm
2power up 1000V and form 60min, obtain one-level anode foils;
4, one-level anode foils is calcined 3min under 520 DEG C of conditions;
5, the superhigh pressure one-level anode foils after calcining being placed on 90 DEG C is formed in liquid, with 100mA/cm
2power up 1000V and form 40min, obtain secondary anode foils;
6, secondary anode foils is placed in the phosphoric acid liquid of 60 DEG C and leaves standstill 4min;
7, the superhigh pressure being placed on 90 DEG C through the acid-treated secondary anode foils of phosphorus is formed in liquid, with 50mA/cm
2power up 1000V and form 30min; Finally take out 100 DEG C of oven dry and obtain extra-high voltage anode foil.
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, comprises and is placed in the superhigh pressure formation liquid of 90 DEG C by the superhigh pressure etched foil soaked in diammonium hydrogen citrate solution, with 100mA/cm
2add electric forming 50 ~ 60min, obtain one-level anode foils; One-level anode foils is calcined 3min under 520 DEG C of conditions; A superhigh pressure anode foils after calcining being placed on 90 DEG C is formed in liquid, with 100mA/cm
2add electric forming 30 ~ 40min, obtain secondary anode foils; Secondary anode foils is placed in the phosphoric acid liquid of 60 DEG C and leaves standstill 2 ~ 4min; Superhigh pressure secondary anode paper tinsel through phosphoric acid liquid process being placed on 90 DEG C is formed in liquid, with 50mA/cm
2add electric forming 20 ~ 30min; Finally take out 100 DEG C of oven dry and obtain extra-high voltage anode foil step, it is characterized in that, further comprising the steps of:
(1) superhigh pressure etched foil is left standstill 5 ~ 20min in the steam of 130 ~ 150 DEG C; Be conducive to diaspore rete with high-temperature water vapor process to generate fast,
(2) the superhigh pressure etched foil through steam treatment is placed on 60 ~ 80 DEG C and soaks 1 ~ 5min containing in the diammonium hydrogen citrate solution of 0.2 ~ 1.0wt%, dissolve unbodied aluminium hydroxide, simultaneously at etched foil Surface Creation diammonium hydrogen citrate solution rete.
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| CN201110441653.XA CN103177878B (en) | 2011-12-26 | 2011-12-26 | A kind of extra-high voltage anode foil formation method |
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| 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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| 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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| 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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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. |