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CN-122013291-A - Method for manufacturing formation foil through pretreatment before formation

CN122013291ACN 122013291 ACN122013291 ACN 122013291ACN-122013291-A

Abstract

The application provides a method for manufacturing a pre-treated formation foil before formation, which comprises the steps of placing an corroded aluminum foil in pure water with the temperature not lower than 96 ℃ for heating for 1-5 minutes to obtain a first treated aluminum foil, placing the first treated aluminum foil in an organic acid solution for 5-20 seconds to obtain a second treated aluminum foil, placing the third treated aluminum foil in pure water for heating for 1-2 minutes to obtain a fourth treated aluminum foil, placing the fourth treated aluminum foil in a furnace with the temperature of 450-500 ℃ for 3-8 seconds to obtain a fifth treated aluminum foil, placing the fifth treated aluminum foil in pure water for heating for 1-2 minutes to obtain a pre-treated aluminum foil, and carrying out post-treatment on the sixth treated aluminum foil for 5-10 minutes and drying in a 150 ℃ atmosphere to obtain the formation foil.

Inventors

  • HUANG JIXIONG
  • WU QIANCHUAN
  • TANG JIAN
  • Yan Lianxin
  • YANG CHENGYUN

Assignees

  • 新疆荣泽铝箔制造有限公司

Dates

Publication Date
20260512
Application Date
20260209

Claims (8)

  1. 1. A method for manufacturing a pretreated formed foil before formation is characterized by comprising the steps of placing an corroded aluminum foil in pure water with the temperature not lower than 96 ℃ and heating for 1-5 minutes to obtain a first treated aluminum foil; placing the first treated aluminum foil in an organic acid solution for 5 to 20 seconds to obtain a second treated aluminum foil; the aluminum foil after the second treatment is placed in a furnace with the temperature of 450-500 ℃ for 3-8 seconds to obtain an aluminum foil after the third treatment, the aluminum foil after the third treatment is placed in pure water for heating for 1-2 minutes to obtain an aluminum foil after the fourth treatment, the aluminum foil after the fourth treatment is placed in a furnace with the temperature of 450-500 ℃ for 3-8 seconds to obtain an aluminum foil after the fifth treatment, the aluminum foil after the fifth treatment is placed in pure water for heating for 1-2 minutes to obtain an aluminum foil after the pretreatment, the aluminum foil after the pretreatment is placed in an ammonium dihydrogen phosphate solution for primary formation for 10-25 minutes, the aluminum foil after the primary formation is obtained, the aluminum foil after the primary formation is placed in a mixed solution of ammonia adipate and citric acid for secondary formation for 10-25 minutes, the aluminum foil after the secondary formation is obtained, the aluminum foil after the secondary formation is placed in a mixed solution of adipic acid for 125-625 minutes, the aluminum foil after the secondary formation is placed in a mixed solution of adipic acid for 10-625 minutes, the aluminum foil after the tertiary formation is placed in a mixed solution of adipic acid for 10-625 minutes, the aluminum foil after the primary formation is placed in a mixed solution for three-stage formation for the adipic acid for 10-25 minutes, and the aluminum foil after the primary formation is placed in a mixed solution for tertiary formation for the aluminum foil after the primary formation for the primary formation is placed in the aluminum formation for three treatment for three steps of 80 minutes, the method comprises the steps of obtaining aluminum foil after four-stage formation, placing the aluminum foil after four-stage formation into a mixed solution of ammonium pentaborate and boric acid for five-stage formation for 10 to 25 minutes, obtaining aluminum foil after five-stage formation with formation voltage of 125 to 625 volts, placing the aluminum foil after five-stage formation into a mixed solution of ammonium pentaborate and azelaic acid for six-stage formation for 10 to 25 minutes, obtaining aluminum foil after six-stage formation with formation voltage of 125 to 625 volts, and carrying out post-treatment on the aluminum foil after six-stage formation for 5 to 10 minutes, and drying in an atmosphere of 150 ℃ to obtain the formed foil.
  2. 2. The method of claim 1, wherein heating the etched aluminum foil in pure water at a temperature of not less than 96 ℃ for 1 to 5 minutes comprises immersing the etched aluminum foil in the pure water, the pure water being deionized water, and heating at a temperature of 96 to 100 ℃ for 1 to 5 minutes to obtain the first treated aluminum foil.
  3. 3. The method of claim 1, wherein the first treated aluminum foil is treated in an organic acid solution for 5 seconds to 20 seconds, comprising immersing the first treated aluminum foil in the organic acid solution, wherein the organic acid solution has a concentration of 0.1 to 1 mol per liter, a treatment temperature of room temperature to 60 ℃ and a treatment duration of 5 seconds to 20 seconds, to obtain the second treated aluminum foil, wherein the organic acid comprises citric acid, and wherein the organic acid solution has a pH of 2 to 4.
  4. 4. The method of claim 1, wherein the second treated aluminum foil is placed in a furnace at a temperature of 450 to 500 ℃ for 3 to 8 seconds, the second treated aluminum foil is placed in the furnace, the furnace is a muffle furnace, the temperature control precision is + -5 ℃, the second treated aluminum foil is rapidly heated to 450 to 500 ℃ and continuously treated for 3 to 8 seconds, the third treated aluminum foil is obtained, the third treated aluminum foil is placed in pure water and heated for 1 to 2 minutes, the pure water is deionized water, the heating temperature is 90 to 100 ℃, and the third treated aluminum foil is immersed in the pure water and stirred, so that the fourth treated aluminum foil is obtained.
  5. 5. The method of claim 1, wherein the primary formation of the pretreated aluminum foil in an ammonium dihydrogen phosphate solution comprises placing the pretreated aluminum foil in the ammonium dihydrogen phosphate solution, wherein the concentration of ammonium dihydrogen phosphate is 10-20 g/L, the primary formation is performed in a constant current and constant voltage mode, the current density is 10-50 mA/square centimeter, the formation time is 10-25 min, the formation voltage is 125V-625V, the primary formed aluminum foil is obtained, the primary formed aluminum foil is placed in an adipic acid ammonia and citric acid mixed solution, the molar concentration ratio of adipic acid ammonia to citric acid is 1:1-1:10, the primary formation is performed in a constant current and constant voltage mode, the current density is 10-50 mA/square centimeter, the formation time is 10-25 min, the formation voltage is 125V-625V, the secondary formed aluminum foil is obtained by placing the secondary formed aluminum foil in an adipic acid ammonium adipate mixed solution, the current density is 1:1-1:1, the constant current and constant current is 10-25V, the current density is 10-50 mA/25 min, the secondary formation is performed in a constant current and constant current is 10:25V-25V.
  6. 6. The method according to claim 1, wherein the four-stage formation of the aluminum foil after three-stage formation is performed in a mixed solution of ammonium adipate and adipic acid, comprising the steps of placing the aluminum foil after three-stage formation in the mixed solution of ammonium adipate and adipic acid, wherein the molar concentration ratio of ammonium adipate to adipic acid is 1:1 to 10:1, performing the four-stage formation in a constant current constant voltage mode, wherein the current density is 10 to 50 milliamperes per square centimeter, the formation time is 10 to 25 minutes, and the formation voltage is 125 to 625 volts, and obtaining the aluminum foil after four-stage formation.
  7. 7. The method according to claim 1, wherein the post-treating the aluminum foil after the six-stage formation for 5 to 10 minutes comprises the steps of placing the aluminum foil after the six-stage formation in a solution containing a surfactant for the post-treatment at a temperature of 40 to 60 ℃ for 5 to 10 minutes, and drying the aluminum foil after the post-treatment in an atmosphere of 150 ℃ to obtain the formed foil.
  8. 8. The method according to claim 1, wherein the step of carrying out six-stage formation on the aluminum foil subjected to five-stage formation in a mixed solution of ammonium pentaborate and azelaic acid comprises the step of carrying out six-stage formation on the aluminum foil subjected to five-stage formation in a mixed solution of ammonium pentaborate and azelaic acid, wherein the concentration ratio of ammonium pentaborate to azelaic acid is 1:1 to 1:5, the six-stage formation is carried out in a constant-current constant-voltage mode, the current density is 10 to 50 milliamperes per square centimeter, the formation time is 10 to 25 minutes, and the formation voltage is 125 to 625 volts, so that the aluminum foil subjected to six-stage formation is obtained.

Description

Method for manufacturing formation foil through pretreatment before formation Technical Field The invention relates to the technical field of information, in particular to a method for manufacturing a formation foil through pretreatment before formation. Background In the field of modern industrial manufacturing, aluminum foil is used as a core material of high-performance electronic components such as capacitors, and the surface treatment technology of the aluminum foil is directly related to the performance and service life of products. The quality of the oxide film formed on the surface of the aluminum foil not only affects the pressure resistance and electrochemical stability of the aluminum foil, but also plays a vital role in the reliability of the whole electronic equipment. Therefore, improving the uniformity and stability of the aluminum foil surface treatment process is always a research direction of great interest in the industry. However, the currently mainstream treatment methods expose some defects that are difficult to ignore in practical applications. When many processes are used for treating the surface of an aluminum foil, uniformity and structural stability of an oxide film cannot be considered, so that a film layer of a part of the area is too thin or too thick, and overall performance is affected. This imbalance phenomenon, especially in high demand scenarios, is prone to product performance fluctuations and even early failure. The deeper problem is that the control of the thickness and structure of the film layer becomes a core technical difficulty in the formation process of the oxide film on the surface of the aluminum foil. If the thickness of the oxide film is uneven, the pressure resistance in a local area is insufficient, and the structural instability may cause peeling or breakage of the film layer in long-term use. For example, in the capacitor manufacturing process, if the oxide film on the surface of the aluminum foil is too thin at some parts, breakdown may occur under a high voltage environment, whereas if the film layer is too thick or the structure is loose, internal resistance may be increased, and electrochemical performance may be reduced. The contradiction between the performance caused by improper control of the film thickness and the structure is a technical bottleneck which needs to be overcome through the whole process flow from the previous treatment to the final forming. Therefore, how to realize the precise control of the thickness and structure of the oxide film in the surface treatment process of the aluminum foil and ensure the uniformity and long-term stability of the film layer in different areas becomes a key problem in the current research and application. Disclosure of Invention The invention provides a method for manufacturing a formation foil which is pretreated before formation, mainly comprising the following steps: Heating the corroded aluminum foil in pure water at the temperature of not lower than 96 ℃ for 1 to 5 minutes to obtain a first treated aluminum foil, heating the first treated aluminum foil in an organic acid solution for 5 to 20 seconds to obtain a second treated aluminum foil, heating the second treated aluminum foil in a furnace at the temperature of 450 to 500 ℃ for 3 to 8 seconds to obtain a third treated aluminum foil, heating the third treated aluminum foil in pure water for 1 to 2 minutes to obtain a fourth treated aluminum foil, heating the fourth treated aluminum foil in a furnace at the temperature of 450 to 500 ℃ for 3 to 8 seconds to obtain a fifth treated aluminum foil, heating the fifth treated aluminum foil in pure water for 1 to 2 minutes to obtain a pretreated aluminum foil, performing primary treatment in an ammonium biphosphate solution for 125 volts to 625 volts, obtaining a primary aluminum foil, mixing the primary treated aluminum foil with an adipic acid solution for 25 to 125 volts, performing tertiary treatment in an adipic acid solution for 10 to 125 volts, mixing the primary treatment with the primary treatment in an adipic acid solution for 25 to 125 volts, performing tertiary treatment in an adipic acid solution for 10 to 125 volts, and mixing the primary treatment with the primary treatment in an adipic acid solution for 625 to obtain a primary treatment aluminum foil, the method comprises the steps of carrying out formation for 10 to 25 minutes, carrying out formation voltage for 125 to 625 volts to obtain aluminum foil after five-stage formation, carrying out six-stage formation on the aluminum foil after five-stage formation in a mixed solution of ammonium pentaborate and azelaic acid for 10 to 25 minutes, carrying out formation voltage for 125 to 625 volts to obtain aluminum foil after six-stage formation, carrying out post-treatment on the aluminum foil after six-stage formation for 5 to 10 minutes, and drying in an atmosphere at 150 ℃ to obtain the formed foil. The method of claim 1, further charac