Method for removing adhesive in anode block of solid electrolytic capacitor

A technology of solid electrolysis and adhesive, which is applied in the manufacture of solid electrolytic capacitors, electrolytic capacitors, and electrolytic capacitors. Improved stability and reliability effects

Active Publication Date: 2018-02-09
CHINA ZHENHUA GRP XINYUN ELECTRONICS COMP ANDDEV CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Therefore, the specific surface area of ​​tantalum powder for making capacitors is also increasing, the particles of tantalum powder are getting finer and smaller, and the pores between particles are getting smaller and smaller; therefore, coating the cathode electrolyte on the surface of the dielectric has become a difficulty in the prior art; In order to overcome this difficulty, many manufacturers increase the porosity in the anode block by changing the binder; however, it is very difficult to completely remove the binder; many manufacturers use high-temperature baking, but due to powder compaction The formed anode body is a porous body with very small pores, and it is difficult to remove it by baking; the present invention proposes a method of dissolution to remove the binder, which can cleanly remove the binder and solvent without leaving residues, It is also beneficial to flush out the fine powder particles clogged in the micropores, and improve the capacity lead-out rate of the capacitor

Method used

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  • Method for removing adhesive in anode block of solid electrolytic capacitor

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Embodiment 1

[0031] A method for removing the binder in the anode block of a solid electrolytic capacitor, comprising the following steps:

[0032] (1) Dissolving: mix the adhesive with the solvent and put it in a blender to stir for 2 hours until the adhesive is completely dissolved to obtain a solution;

[0033] (2) Spraying: Spray the solution on the surface of the tantalum powder, and stir while spraying to obtain a mixture;

[0034] (3) Drying: put the mixture in an environment of 20°C and dry for 20 minutes to obtain powder;

[0035] (4) Molding: Pour the powder into a molding machine and press into a molding machine to obtain a tantalum billet;

[0036] (5) Shaking sieve: place the tantalum billet in the sieve and shake it for 3 minutes until there are no particles or dust particles in the sieve;

[0037] (6) The first dissolution: After shaking the sieve, immerse the sieve together with the tantalum billet into the A-type solution for dissolution, and rotate during the dissolutio...

Embodiment 2

[0051] A method for removing the binder in the anode block of a solid electrolytic capacitor, comprising the following steps:

[0052] (1) Dissolving: mix the adhesive with the solvent and put it in a blender to stir for 4 hours until the adhesive is completely dissolved to obtain a solution;

[0053] (2) Spraying: Spray the solution on the surface of the tantalum powder, and stir while spraying to obtain a mixture;

[0054] (3) Drying: put the mixture in an environment of 100°C and dry for 300 minutes to obtain powder;

[0055] (4) Molding: Pour the powder into a molding machine and press into a molding machine to obtain a tantalum billet;

[0056] (5) Shaking sieve: place the tantalum billet in a sieve and shake it for 5 minutes until there are no particles or dust particles in the sieve;

[0057] (6) The first dissolution: After shaking the sieve, immerse the sieve together with the tantalum billet into the A-type solution for dissolution, and rotate during the dissolutio...

Embodiment 3

[0071] A method for removing the binder in the anode block of a solid electrolytic capacitor, comprising the following steps:

[0072] (1) Dissolution: mix the adhesive with the solvent and put it in a blender to stir for 3 hours until the adhesive is completely dissolved to obtain a solution;

[0073] (2) Spraying: Spray the solution on the surface of the tantalum powder, and stir while spraying to obtain a mixture;

[0074] (3) Drying: put the mixture in an environment of 80° C. and dry it for 220 minutes to obtain powder;

[0075] (4) Molding: Pour the powder into a molding machine and press into a molding machine to obtain a tantalum billet;

[0076] (5) Shaking sieve: place the tantalum billet in a sieve and shake it for 4 minutes until there are no particles or dust particles in the sieve;

[0077] (6) The first dissolution: After shaking the sieve, immerse the sieve together with the tantalum billet into the Class A solution for dissolution, and rotate during the diss...

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Abstract

The invention belongs to the technical field of manufacturing of electrolytic capacitors, and particularly discloses a method for removing an adhesive in an anode block of a solid electrolytic capacitor. Treatment is carried out through the following 11 steps of dissolving, spaying, drying, compression, reciprocating sifting, first elution, standing, second elution, third elution, boiling and drying in all, so that the adhesive and a solvent can be removed clean without a residue, improvement of electric performance parameters of the capacitor is facilitated, meanwhile, fine powder particles blocked in micropores and powder particles adhered to the surface of an anode blank are also burst through, the capacity extraction rate of the capacitor is improved, and the probability of crystallization when an anode is formed is reduced. According to the method, increase of the content of impurities of carbon and oxygen in the tantalum blank is effectively suppressed, the porosity in the tantalum blank is improved and the stability and the reliability of the tantalum electrolytic capacitor are improved.

Description

technical field [0001] The invention belongs to the technical field of electrolytic capacitor manufacturing, in particular to a method for removing adhesives in anode blocks of solid electrolytic capacitors. Background technique [0002] With the acceleration of digitization, miniaturization and light weight of electronic equipment, capacitors are required to be smaller in size and larger in capacity. Therefore, the specific surface area of ​​tantalum powder for making capacitors is also increasing, the particles of tantalum powder are getting finer and smaller, and the pores between particles are getting smaller and smaller; therefore, coating the cathode electrolyte on the surface of the dielectric has become a difficulty in the prior art; In order to overcome this difficulty, many manufacturers increase the porosity in the anode block by changing the binder; however, it is very difficult to completely remove the binder; many manufacturers use high-temperature baking, but ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01G9/00H01G9/15
CPCH01G9/0029H01G9/15
Inventor 田东斌张选红王渝李美霞王福权陈果
Owner CHINA ZHENHUA GRP XINYUN ELECTRONICS COMP ANDDEV CO LTD
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