Looking for breakthrough ideas for innovation challenges? Try Patsnap Eureka!

Production method of medium and high pressure formed foil

A manufacturing method, medium and high pressure corrosion foil technology, applied in the direction of electrolytic capacitors, electrical components, circuits, etc., can solve the problem of poor electrical properties and water resistance of oxide films, poor water resistance film performance of foils, and foils are not practical To reduce the interference, excellent hydration resistance, and increase the specific volume

Inactive Publication Date: 2008-08-20
RUYUAN YAO AUTONOMOUS COUNTY DONGYANGGUANG FORMED FOIL CO LTD
View PDF3 Cites 26 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, practical experience suggests that the water-resistance film of the foil obtained in this way is not good, especially as the formation voltage increases, the foil will be severely curled, and the electrical properties and water resistance of the oxide film will deteriorate after formation. , this process is not practical for foils with a formation voltage exceeding 400V, and it is difficult to implement large-scale production under the existing industry workshop equipment and conditions

Method used

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
View more

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0027] Use medium and high pressure to corrode the foil, boil it in pure water above 98°C for 12 minutes, and then perform the first stage formation voltage at 85°C in a mixed solution of 5wt% boric acid and 0.3wt% ammonium borate (or sodium) aqueous solution When the voltage reaches 250V, keep the voltage constant for 10 minutes; then carry out the second-stage formation at 85°C in 5wt% boric acid, 0.15wt% ammonium borate (or sodium) aqueous solution, and keep the voltage constant for 15 minutes when the voltage reaches 480V; then use 5wt% boric acid, 0.08wt% ammonium borate (or sodium) mixed solution was carried out at 85°C for the third-stage formation, and the voltage reached 580V for 30 minutes; then heat treatment was carried out at 480°C for 2.5 minutes; ℃, 5g / L phosphoric acid solution for 4.5 minutes; then carry out re-formation in the above-mentioned third-stage chemical solution; then carry out the second heat treatment at 480°C for 2.5 minutes; The second re-format...

Embodiment 2

[0029] Use medium and high pressure to corrode the foil, boil it in pure water above 98°C for 10 minutes, and then perform the first-level chemical formation at 85°C in a mixed solution of 6wt% boric acid and 0.2wt% ammonium borate (or sodium) aqueous solution, When the voltage reaches 250V, keep the voltage constant for 10 minutes; then carry out the second stage formation at 90°C in 5wt% boric acid, 0.15wt% ammonium borate (or sodium) aqueous solution, and keep the voltage constant for 15 minutes when the voltage reaches 480V; , 0.08wt% ammonium borate (or sodium) mixed solution at 90 ° C for the third level of chemical formation, when the voltage reaches 580 V constant voltage for 30 minutes; then heat treatment, the temperature is 500 ° C, the time is 2 minutes; The temperature in the L phytic acid aqueous solution is 60 °C, and the treatment time is 6 minutes; after that, it is re-formed in the above-mentioned third-level chemical conversion solution; then the second heat ...

Embodiment 3

[0031] Use medium and high pressure to corrode the foil, boil it in pure water above 98°C for 12 minutes, and then perform the first-level chemical formation at 85°C in a mixed solution of 6wt% boric acid and 0.3wt% ammonium borate (or sodium) aqueous solution, When the voltage reaches 250V, keep the voltage constant for 10 minutes; then carry out the second-stage formation at 85°C in 5wt% boric acid and 0.15wt% ammonium borate (or sodium) aqueous solution, and keep the voltage constant for 15 minutes when the voltage reaches 480V; , 0.08wt% ammonium borate (or sodium) mixed solution at 85 ° C for the third level of chemical formation, when the voltage reaches 580V constant voltage 30 minutes; then heat treatment, the temperature is 500 ° C, the time is 2.5 minutes; The temperature in the L ammonium hypophosphite solution is 70°C, and the treatment time is 8 minutes; after that, it is reformed in the above-mentioned third-stage chemical conversion solution; then, the second hea...

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

PUM

No PUM Login to View More

Abstract

The invention relates to a preparing method of a middle-high voltage formed foil, comprising the steps that: a middle-high voltage etched foil is put in pure water with a temperature no less than 96 DEG C to hydrate; the hydrated foil is electrified three to four levels to form; the formed foil is heated; the heated foil is put into the processing liquid including phosphorus-containing inorganic acid and / or phosphorus-containing organic acid to middle processing; the middle processed foil is put into the forming liquid to first reforming, with the same forming liquid as that of the second step; the first reformed foil is reheated; the reheated foil is second reformed; and the high-middle voltage formed foil is got. The invention has the advantages that: the passivation is highly effective, the passivant can be freely selected, the control scope of the parameter of the passivation is large, the processing process is more energy-saving and time-saving, as well as more suitable for current workshop scale production.

Description

technical field [0001] The invention relates to a method for preparing an aluminum foil for a capacitor, and more specifically, the invention relates to a method for manufacturing a medium-voltage anode foil for an electrolytic capacitor. Background technique [0002] Electrolytic capacitors are widely used in many related industries such as electronics. Now, with the progress of science and technology and the development of industry, higher requirements are put forward for electrolytic capacitors in terms of power frequency, low impedance, and long life. In order to achieve higher electrical performance of electrolytic capacitors, it is often necessary to use high-moisture electrolytes in capacitors. However, at high temperatures, the aluminum foil oxide film, especially the anode foil oxide film, will hydrate with moisture, so that the anode foil Aluminum hydroxide is formed on the surface, which leads to a decrease in the withstand voltage of the anode foil and an increa...

Claims

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

Application Information

Patent Timeline
no application Login to View More
IPC IPC(8): H01G9/04H01G9/055C23F1/00C23F1/16H01G9/045H01G9/00
Inventor 何凤荣
Owner RUYUAN YAO AUTONOMOUS COUNTY DONGYANGGUANG FORMED FOIL CO LTD
Who we serve
  • R&D Engineer
  • R&D Manager
  • IP Professional
Why Patsnap Eureka
  • Industry Leading Data Capabilities
  • Powerful AI technology
  • Patent DNA Extraction
Social media
Patsnap Eureka Blog
Learn More
PatSnap group products

Browse by: Latest US Patents, China's latest patents, Technical Efficacy Thesaurus, Application Domain, Technology Topic, Popular Technical Reports.

© 2024 PatSnap. All rights reserved.Legal|Privacy policy|Modern Slavery Act Transparency Statement|Sitemap|About US| Contact US: help@patsnap.com