Additive for ultimate formation liquid of middle and high pressure formed foil and adding method thereof

An additive and chemical-forming technology, applied in capacitors, circuits, electrolytic capacitors, etc., can solve the problems of large rise in boost time, affecting aluminum electrolytic capacitors, and sophisticated production, and achieve the effect of stable performance.

Inactive Publication Date: 2014-06-25
GUANGXI HEZHOU GUIDONG ELECTRONICS TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The chemical forming foil produced by using this final chemical forming liquid has a longer boost time Tr (60) after hydration treatment, and a large increase in boost time after long-term storage, which affects the sophisticated production of downstream products aluminum electrolytic capacitors

Method used

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  • Additive for ultimate formation liquid of middle and high pressure formed foil and adding method thereof
  • Additive for ultimate formation liquid of middle and high pressure formed foil and adding method thereof
  • Additive for ultimate formation liquid of middle and high pressure formed foil and adding method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0012] Medium voltage 200Vf formation. The medium-pressure corroded foil is boiled in pure water for 5 minutes, then in the formation solution containing boric acid, citric acid and its salts, the first-level constant pressure 70V formation is carried out for 10 minutes, the second-level constant pressure 170V formation is 10 minutes, and then the boric acid and its salts are formed. The main solute is formed by adding 0.500wt% sebacic acid as an additive to the third-stage constant pressure 180V formation solution for 20 minutes. Then heat treatment, intermediate treatment, repeated chemical conversion 3 times, and post-treatment.

[0013] Test data of chemical foil produced by different final chemical liquids:

[0014] Table 1

[0015]

[0016] From the experimental results in Table 1, it can be seen that the boosting time Tr(60) after hydration resistance of the chemically formed foil of the present invention is shortened by 4s compared with that of the prior art.

Embodiment 2

[0018] High voltage 530Vf formation. The high-pressure corroded foil is boiled in pure water for 10 minutes, and then in the formation solution containing boric acid, citric acid and its salts, the first-level constant pressure 150V formation is carried out for 10 minutes, and the second-level constant pressure 300V formation is 10 minutes. The main solute is boric acid and its salts. , adding 0.05wt% azelaic acid as an additive to the formation solution for the third stage constant pressure 450V formation for 10 minutes; then boric acid and its salt as the main solute, adding 0.03wt% ammonium hydrogen azelate as an additive to the formation solution for the fourth stage Level constant voltage 505V for 25 minutes; then heat treatment, intermediate treatment, repeated formation 3 times, and post-treatment.

[0019] Table 2

[0020]

[0021] From the experimental results in Table 2, it can be seen that the boosting time Tr(60) after hydration resistance of the chemically for...

Embodiment 3

[0023] 660Vf formation. The high-pressure corroded foil is boiled in pure water at 95°C for 12 minutes, then in the formation solution containing boric acid, citric acid and its salts, the first level of constant voltage 200V formation for 12 minutes, the second level of constant pressure 400V formation for 12 minutes, and the boric acid and its salts As the main solute, add 0.03wt% azelaic acid as an additive to the formation solution for the third-stage constant pressure 600V formation for 15 minutes; then use boric acid and its salt as the main solute, add 0.01wt% ammonium hydrogen azelate as an additive to the formation solution Carry out the fourth-stage constant voltage 640V formation for 30 minutes; then perform heat treatment, intermediate treatment, repeated formation for 3 minutes, and post-treatment.

[0024] table 3

[0025]

[0026] From the experimental results in Table 3, it can be seen that the boosting time Tr(60) after the hydration resistance of the pres...

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Abstract

The invention discloses an additive for an ultimate formation liquid of middle and high pressure formed foil and an adding method thereof, the additive is a long-carbon-chain dicarboxylic acid or a salt thereof, and comprises one or more than one from azelaic acid, ammonium hydrogen azelate, sebacic acid and ammonium sebacate, and the additive content is 0.001-0.500wt%. According to the method by adding the additive into the ultimate formation liquid, hydration resistance of the middle and high pressure formed foil can be effectively improved, and the formed foil is more stable in performance.

Description

technical field [0001] The invention belongs to the technical field of electronic material manufacturing, and in particular relates to an additive for a medium-high pressure forming foil final forming liquid and an adding method thereof. Background technique [0002] At present, medium and high pressure forming foils are usually produced by three-stage, four-stage or five-stage chemical formation, and the final chemical formation liquid is generally prepared by boric acid and its salt or ammonia water. The chemical forming foil produced by using this final chemical forming liquid has a longer boost time Tr (60) after hydration treatment, and a large increase in boost time after long-term storage, which affects the mature production of downstream products aluminum electrolytic capacitors. Tr(60) is a technical index for evaluating the performance stability of formed foil after hydration treatment. Contents of the invention [0003] In order to overcome the shortcomings of ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C25F3/04H01G9/045H01G9/055
Inventor 宋洪洲陆宝琳杨林桑黄胜权
Owner GUANGXI HEZHOU GUIDONG ELECTRONICS TECH
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