Production method of high-specific-capacitance cathode foil blank of aluminum electrolytic capacitor

Abstract

The invention relates to a production method of a high-specific-capacitance cathode foil blank of an aluminum electrolytic capacitor. The production method of the high-specific-capacitance cathode foil blank of the aluminum electrolytic capacitor is characterized in that components of pure aluminum cathode foil for the capacitor comprise, by mass percent, not larger than 0.06% of Si, 0.08%-0.13% of Fe, 0.2%-0.3% of Cu, 0.01% of Mn, 0.01% of Mg, 0.01% of Cr, 0.02% of Zn and 0.015%-0.025% of Ti. By means of the method, the cathode foil blank with the specific capacitance larger than 550 microfarads / cm < 2 > is finally produced.

Description

technical field [0001] The invention relates to the technical field of a production method of a high specific capacitance cathode foil blank of an aluminum electrolytic capacitor, in particular to a production method of a high specific capacitance cathode foil blank of an aluminum electrolytic capacitor. Background technique [0002] Cathode foil is the core raw material of aluminum electrolytic capacitors. The development of the cathode foil industry is highly dependent on the development of the aluminum electrolytic capacitor industry. my country's aluminum electrolytic capacitors have developed rapidly and have become the world's largest producer of electrolytic capacitors, with an increase rate of about 9%. , the market supply and demand of cathode foil and the market size of aluminum electrolytic capacitors basically keep changing in the same direction. At present, most domestic cathode foil blanks are produced by casting and rolling method, but due to problems such as u...

AI Technical Summary

Problems solved by technology

At present, most domestic cathode foil blanks are produced by casting and rolling method, but due to problems such as uneven composition and coarse grains of casting and rolling blanks, the subsequent corrosion process is uneven, the porosity is not high, and the specific capacitance of the final product is low. At present, the specific capacitance of the cathode foil blank produced by the casting and rolling method can only reach about 450μf / cm2 when it is processed to the final product.

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