Medium-high-voltage electronic aluminum foil for high-capacity and high-strength capacitor and preparation method thereof

An electronic aluminum foil, high-strength technology, applied in capacitors, electrolytic capacitors, circuits, etc., can solve the problems of shortening production cycle, uneven casting structure, etc., to eliminate the influence of uneven casting, avoid coarse grains, and prevent surface damage Effect

Active Publication Date: 2021-08-10
广西广投正润新材料科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] Aiming at the deficiencies in the prior art, the present invention provides medium and high-voltage electronic aluminum foil for high-capacity and high-strength capacitors and its preparation method. Through the production mode of casting and continuous air cushion furnace, not only the specific volume is improved, but also the production cycle is shortened. For the first time, the continuous air cushion furnace is used for homogenization and annealing to improve the problem of uneven casting structure, thereby improving the performance and cubic texture. The air cushion furnace improves the cleanliness of aluminum foil through the integration of alkali cleaning, spraying and other functions, and enhances the corrosion and porosity of aluminum foil , to obtain a medium-high-voltage high-purity aluminum foil for high-capacity and high-strength capacitors

Method used

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  • Medium-high-voltage electronic aluminum foil for high-capacity and high-strength capacitor and preparation method thereof
  • Medium-high-voltage electronic aluminum foil for high-capacity and high-strength capacitor and preparation method thereof
  • Medium-high-voltage electronic aluminum foil for high-capacity and high-strength capacitor and preparation method thereof

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Effect test

Embodiment 1

[0062] A method for preparing medium and high voltage electronic aluminum foil for high-capacity and high-strength capacitors, comprising the following steps:

[0063] 1) Casting: After smelting, heat preservation, refining and standing still, the raw materials of high-purity molten aluminum casting are used to produce flat ingots by semi-continuous casting. The casting temperature is 695°C, and the formed flat ingots are obtained by rapid cooling;

[0064] 2) Homogenization: Homogenize the shaped slab obtained in the previous step through an annealing furnace, the homogenization temperature is 570°C, the homogenization time is 19h, and air-cool to room temperature after homogenization;

[0065] 3) Hot rolling: the slab after the homogenization treatment in the previous step is hot-rolled by an integrated roughing and finishing rolling unit, the hot rolling start temperature is 520°C, and the final rolling temperature is 280°C to obtain a hot rolled thickness of 6mm. Coil;

...

Embodiment 2

[0077] A method for preparing medium and high voltage electronic aluminum foil for high-capacity and high-strength capacitors, comprising the following steps:

[0078] 1) Casting: After smelting, heat preservation, refining and standing still, the raw materials of high-purity molten aluminum casting are used to produce flat ingots by semi-continuous casting. The casting temperature is 680°C, and the formed flat ingots are obtained by rapid cooling;

[0079] 2) Homogenization: Homogenize the shaped slab obtained in the previous step through an annealing furnace, the homogenization temperature is 560°C, the homogenization time is 15h, and air-cool to room temperature after homogenization;

[0080] 3) Hot rolling: the slab after the homogenization treatment in the previous step is hot-rolled by an integrated roughing and finishing rolling unit, the hot rolling start temperature is 500°C, and the final rolling temperature is 350°C to obtain a hot rolled thickness of 9mm. Coil;

...

Embodiment 3

[0092] A method for preparing medium and high voltage electronic aluminum foil for high-capacity and high-strength capacitors, comprising the following steps:

[0093] 1) Casting: After smelting, heat preservation, refining and standing still, the raw materials of high-purity molten aluminum casting are used to produce flat ingots by semi-continuous casting. The casting temperature is 710°C, and the formed flat ingots are obtained by rapid cooling;

[0094] 2) Homogenization: Homogenize the shaped slab obtained in the above step through an annealing furnace, the homogenization temperature is 550°C, the homogenization time is 25h, and air-cool to room temperature after homogenization;

[0095] 3) Hot rolling: the slab after the homogenization treatment in the previous step is hot-rolled by the integrated roughing and finishing rolling unit, the starting temperature of the hot rolling is 550°C, and the finishing temperature is 250°C to obtain a hot-rolled hot-rolled sheet with a ...

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Abstract

The invention discloses a medium-high-voltage electronic aluminum foil for a high-capacity and high-strength capacitor and a preparation method thereof. Through the production modes of casting and a continuous air cushion furnace, the specific volume is increased, and the production period is shortened; and the continuous air cushion furnace is used for multiple times for homogenization and annealing, and the problem that a casting structure is not uniform is solved, so that the performance and the cubic texture are improved, and the medium-high-voltage high-purity aluminum foil for the high-capacity and high-strength capacitor is obtained.

Description

【Technical field】 [0001] The invention relates to the technical field of medium and high voltage electronic aluminum foil processing, in particular to a medium and high voltage electronic aluminum foil for high-capacity and high-strength capacitors and a preparation method thereof. 【Background technique】 [0002] Nowadays, with the rapid development of the electrical and electronic industries, aluminum electrolytic capacitors continue to develop towards high performance, miniaturization, and integration. The production of aluminum foil to meet the increasing demand of the market. [0003] The current research on the miniaturization of aluminum electrolytic capacitors, such as the Chinese patent CN201310199380 method for two-stage hole expansion corrosion of medium and high voltage electronic aluminum foils, includes the following steps: After the medium and high voltage electronic aluminum foils are pretreated and pore treated, the holes are formed with large openings and sm...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C21D8/02B22D11/00B22D7/00C22F1/04C21D1/26C21D9/52C22F1/02C23G1/22C23F17/00H01G9/045B21B1/46B21B1/40B21B3/00
CPCC21D8/0226C21D8/0236C21D8/0247B22D11/00B22D7/005C22F1/04C21D1/26C21D9/52C22F1/02C23G1/22C23F17/00H01G9/045B21B1/463B21B1/40B21B3/00C21D2251/02B21B2003/001
Inventor 李永春伍志铭黄奎胡传彬刘挺贾桂龙尹建平覃雪黄玉芳
Owner 广西广投正润新材料科技有限公司
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