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Alloy cathode foil which is special for capacitor and produced by continuous roll casting method and preparation method

A kind of alloy negative electrode, capacitor technology

Active Publication Date: 2012-11-28
新疆天山盈达碳素有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

CN101519760A discloses a manufacturing method of 3003 grade cathode aluminum foil, the mass percent of Mn in the alloy is 1.1-1.2%, the manganese content is too high, and the alloy does not contain magnesium, and the coarse MnAl6 phase will be precipitated in the recrystallization process , prone to uneven corrosion
The processing cycle is long and the processing cost is high

Method used

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  • Alloy cathode foil which is special for capacitor and produced by continuous roll casting method and preparation method

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0038] Example 1: 0.041mm thick alloy negative electrode foil for capacitors

[0039] a. Production of cast-rolled coils

[0040] The chemical composition mass fraction of the cast-rolled coil is as follows: Si: 0.10%, Fe: 0.46%, Cu: 0.18%, Mn: 0.9%, Mg: 0.01%, Zn: 0.01%, Ti: 0.05%, and the balance is Al;

[0041] The production process of cast-rolled coils is: furnace preparation→furnace material preparation→furnace loading→melting→stirring and slag removal→composition adjustment→in-furnace treatment (first refining)→converter and standing (second refining)→removal Air box degassing and slag removal → filter box dual-channel dual-stage ceramic filter plate filter slag removal → casting and rolling into cast-rolled coils, and the regulations on waste in the furnace charge preparation are: use 1XXX series pure aluminum group for waste, and the total input amount of waste ≤35% (of which secondary waste should be ≤30%), primary aluminum ingots ≥65%.

[0042] b. Cold foil rolli...

Embodiment 2

[0045] Example 2: 0.038mm thick alloy negative electrode foil for capacitors

[0046] a. Production of cast-rolled coils

[0047] The chemical composition mass fraction of the cast-rolled coil is as follows: Si: 0.13%, Fe: 0.48%, Cu: 0.15%, Mn: 0.93%, Mg: 0.02%, Zn: 0.005%, Ti: 0.03%, and the balance is Al;

[0048] The production process of cast-rolled coils is: furnace preparation→furnace material preparation→furnace loading→melting→stirring and slag removal→composition adjustment→in-furnace treatment (first refining)→converter and standing (second refining)→removal Air box degassing and slag removal → filter box dual-channel dual-stage ceramic filter plate filter slag removal → casting and rolling into cast-rolled coils, and the regulations on waste in the furnace charge preparation are: use 1XXX series pure aluminum group for waste, and the total input amount of waste ≤35% (of which secondary waste should be ≤30%), primary aluminum ingots ≥65%.

[0049] The length of th...

Embodiment 3

[0053] Example 3: 0.027mm thick alloy negative electrode foil for capacitors

[0054] a. Production of cast-rolled coils

[0055] The mass fractions of the chemical components of the cast-rolled coil are as follows: Si: 0.16%, Fe: 0.49%, Cu: 0.16%, Mn: 0.95%, Mg: 0.03%, Zn: 0.005%, Ti: 0.03%, and the balance is Al;

[0056] The production process of cast-rolled coils is: furnace preparation→furnace material preparation→furnace loading→melting→stirring and slag removal→composition adjustment→in-furnace treatment (first refining)→converter and standing (second refining)→removal Air box degassing and slag removal → filter box dual-channel dual-stage ceramic filter plate filter slag removal → casting and rolling into cast-rolled coils, and the regulations on waste in the furnace charge preparation are: use 1XXX series pure aluminum group for waste, and the total input amount of waste ≤35% (of which secondary waste should be ≤30%), primary aluminum ingots ≥65%.

[0057] The leng...

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Abstract

The invention relates to alloy cathode foil which is special for capacitors and produced by a continuous roll casting method, and the alloy cathode foil is characterized in that the foil comprises the following chemical components by mass fraction: 0.10-0.20% of Si, 0.46-0.50% of Fe, 0.14-0.18% of Cu, 0.9-1.0% of Mn, 0.01-0.05% of Mg, not more than 0.01% of Zn, not more than 0.05% of Ti, and the balance of Al. The preparation method comprises the following steps: a. producing a roll-casting roll; b. rolling the roll-casting roll, that is, roll-casting a 7.5 mm roll-casting plate into 5.0 mm, performing uniform annealing, roll casting to orderly obtain a dimension of 2.5 mm, 1.25 mm, 0.7 mm, and 0.5 mm, performing intermediate annealing, roll casting to orderly obtain a dimension of 0.24 mm, 0.15 mm, 0.09 mm, and 0.062 mm so as to obtain the finished product. The method shortens the production flow, and simplifies the production process, and the obtained aluminium foil has good quality.

Description

technical field [0001] The invention relates to a special alloy negative electrode foil for capacitors produced by a continuous casting and rolling method and a preparation method thereof. The invention belongs to the technical field of aluminum foil processing. Background technique [0002] Plain aluminum foil for the negative electrode of aluminum electrolytic capacitors (hereinafter referred to as negative aluminum foil) is one of the key raw materials required for capacitor manufacturing. The negative electrode aluminum foil is chemically etched or electrochemically etched by a professional factory to make negative electrode foils of different sizes and specifications, and then wound and packaged with other materials such as anode electrode foils and electrolyte-soaked liner paper to form aluminum electrolytic capacitors . The quality of plain aluminum foil directly determines the reliability and stability of capacitor quality. As far as negative electrode aluminum fo...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C22C21/00B21B1/46B21B1/40C21D8/02C22F1/04H01G9/045
Inventor 白杰黄善球范文慧刘军民朱东年王民生曾荣华
Owner 新疆天山盈达碳素有限公司
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