Method and device for depositing disperse tin and zinc crystal nucleuses on surface of highly pure aluminum foil for medium and high voltage anodes in mist spraying mode

A spray deposition, medium and high voltage technology, applied in the direction of electrolytic capacitors, electrical components, circuits, etc., can solve the problems of reducing the yield rate of aluminum foil corrosion foil mechanical properties, accelerating the self-corrosion of aluminum foil surface, unfavorable corrosion foil specific capacitance, etc., to improve Utilization and mechanical properties, improve uniformity, reduce the effect of merging holes

Active Publication Date: 2015-06-24
广西广投正润新材料科技有限公司 +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0007] The problems existing in the prior art are mainly: although the deposition of a loose metal thin layer can effectively improve the uniformity of aluminum foil pores, it will strongly accelerate the self-corrosion of the aluminum foil surface, resul

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  • Method and device for depositing disperse tin and zinc crystal nucleuses on surface of highly pure aluminum foil for medium and high voltage anodes in mist spraying mode
  • Method and device for depositing disperse tin and zinc crystal nucleuses on surface of highly pure aluminum foil for medium and high voltage anodes in mist spraying mode
  • Method and device for depositing disperse tin and zinc crystal nucleuses on surface of highly pure aluminum foil for medium and high voltage anodes in mist spraying mode

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Effect test

Embodiment 1

[0033] The rolled aluminum foil with an Al purity of 99.99%, a thickness of 110 μm, and a {100} plane texture occupancy of more than 95% is not enriched in Mn, Fe, Co, Ni, Cu, Zn, Cd, Ga after recrystallization annealing , Ge, In, Sn, Pb, which have higher electrode potential than aluminum, use high-purity aluminum foil for medium and high-voltage anodes, and place them in a sodium hydroxide alkali solution with a temperature of 40 °C and a concentration of 1 mol / L for 30 seconds, and then do not go through deionization. Wash with water to cover the surface of the aluminum foil with a pretreatment lye film; place the above aluminum foil in a fog chamber for spray deposition tin crystal nucleus treatment, the composition of the solution is: 0.2mol / L sodium stannate+0.1mol / L sodium hydroxide +0.005 mol / L potassium sodium tartrate; the temperature in the spray deposition fog box is 60°C, and the spray deposition time is 2 minutes.

[0034] The above-mentioned aluminum foil that h...

Embodiment 2

[0036] The rolled aluminum foil with an Al purity of 99.99%, a thickness of 110 μm, and a {100} plane texture occupancy of more than 95% is not enriched in Mn, Fe, Co, Ni, Cu, Zn, Cd, Ga after recrystallization annealing , Ge, In, Sn, Pb, these medium and high voltage anodes whose electrode potential is higher than that of aluminum are treated with high-purity aluminum foil in a sodium hydroxide alkali solution with a temperature of 40°C and a concentration of 1mol / L for 30 seconds, and then without deionization cleaning , so that the surface of the aluminum foil is covered with a pretreatment lye film; the above-mentioned aluminum foil is placed in a fog box for spray deposition zinc crystal nucleus treatment, and the composition of the solution is: 0.2mol / L zinc oxide+0.3mol / L sodium hydroxide; spray deposition The temperature of the fog box is 60 °C, and the spray deposition time is 2 min.

[0037] The above-mentioned aluminum foil that has been deposited on the surface by ...

Embodiment 3

[0039] The rolled aluminum foil with an Al purity of 99.99%, a thickness of 110 μm, and a {100} plane texture occupancy of more than 95% is not enriched in Mn, Fe, Co, Ni, Cu, Zn, Cd, Ga after recrystallization annealing , Ge, In, Sn, Pb, these medium and high voltage anodes whose electrode potential is higher than that of aluminum are treated with high-purity aluminum foil in a sodium hydroxide alkali solution with a temperature of 60°C and a concentration of 1mol / L for 15 seconds, and then without deionization cleaning , so that the surface of the aluminum foil is covered with a pre-treated lye film; then the above-mentioned aluminum foil is placed in a fog box for spray deposition tin crystal nucleus treatment, and the composition of the solution is: 0.2mol / L sodium stannate+0.1mol / L sodium hydroxide+ 0.005 mol / L potassium sodium tartrate; the temperature in the spray deposition fog box is 60° C., and the spray deposition time is 2 minutes.

[0040] The above-mentioned alum...

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Abstract

The invention discloses a method and device for depositing disperse tin and zinc crystal nucleuses on the surface of highly pure aluminum foil for medium and high voltage anodes in a mist spraying mode. The method includes the following steps that recrystallization annealing treatment is carried out on the rolled aluminum foil, the highly pure aluminum foil for medium and high voltage anodes is formed, the {100} surface texture occupancy of the highly pure aluminum foil is larger than 95 percent, Mn, Fe, Co, Ni, Cu, Zn, Cd, Ga, Ge, In, Sn and Pb elements of which the electrode levels are higher than that of Al are not rich on the surface of the highly pure aluminum foil, and the purity of Al is more than 99.99 percent; an oxidation film on the surface is removed through an alkali wash pre-treatment method; aluminum foil with the surface covered with a pre-treatment alkali wash film is arranged in a mist box formed by ultrasonic spraying mist to deposit disperse tin and zinc crystal nucleuses. When the highly pure aluminum foil for medium and high voltage anodes with the surface deposited with the tin and zinc crystal nucleuses is adopted, the tin and zinc crystal nucleuses can effectively guide corrosion poring of the aluminum foil in the electrolytic corrosion process, distribution uniformity of channel holes is improved, self-corrosion thinning of the aluminum foil is reduced, and therefore the specific capacitance and bending resistance of the aluminum foil can be obviously improved.

Description

technical field [0001] The invention relates to the field of manufacturing medium and high-voltage anode high-purity aluminum foils and corrosion foils for aluminum electrolytic capacitors, in particular to a method and device for spraying and depositing dispersed tin and zinc crystal nuclei on the surface of high-purity aluminum foils for medium and high-voltage anodes. Background technique [0002] With the continuous development of electronic products, medium and high voltage aluminum electrolytic capacitors as basic components are required to have the characteristics of high capacity and miniaturization to meet the development needs of electronic products. The anode electrode foil used in medium and high voltage aluminum electrolytic capacitors generally generates a large number of tunnel holes on the surface of the high-purity aluminum foil for the anode by electrochemical corrosion to expand its surface area, thereby increasing the specific capacitance and realizing hig...

Claims

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Application Information

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IPC IPC(8): H01G9/045H01G9/055C22F1/04C23G1/22
Inventor 何业东彭宁杨宏宋洪洲
Owner 广西广投正润新材料科技有限公司
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