阅读说明：本技术 电解电容器用高压阳极铝箔的高纯板锭、阳极铝箔、电解电容器 (High-purity plate ingot of high-voltage anode aluminum foil for electrolytic capacitor, anode aluminum foil and electrolytic capacitor ) 是由 左宏 樊兵 高建华 张振江 金永明 陈伍平 郑秀玲 于 2019-11-27 设计创作，主要内容包括：本发明为电解电容器用高压阳极铝箔的高纯板锭、阳极铝箔、电解电容器。一种电解电容器用高压阳极铝箔的高纯板锭,所述高纯板锭由30-100wt％的偏析初级原料和0-70wt％的二级原料制备,所述的高纯铝板锭包括：Al：≥99.9wt％；Fe：5-35ppm；Si：5-35ppm；Cu：10-100ppm；Pb：0.2-3ppm；B：0.5-5ppm；Zn：2-30ppm；Ga：2-30ppm；Mn：2-30ppm；所述的高纯铝板锭还包括：铈、钪、锆、钒、铬、镍、镁、锡中的一种或多种,且总含量为3-45ppm。本发明所述的一种电解电容器用高压阳极铝箔的高纯板锭,通过使用100wt％偏析法初级原料+0wt-70wt％的二级原料制备高纯铝板锭,并且对产品的微量元素种类及含量进行了控制,通过此工艺生产的高压阳极电解电容器用铝箔的具有高容量、高折弯性能的优点。(The invention relates to a high-purity plate ingot of a high-voltage anode aluminum foil for an electrolytic capacitor, the anode aluminum foil and the electrolytic capacitor. A high purity plate ingot of high voltage anode aluminum foil for electrolytic capacitors, which is prepared from 30-100 wt% of a segregated primary raw material and 0-70 wt% of a secondary raw material, the high purity plate ingot comprising: al: not less than 99.9 wt%; fe: 5-35 ppm; si: 5-35 ppm; cu: 10-100 ppm; pb: 0.2-3 ppm; b: 0.5-5 ppm; zn: 2-30 ppm; ga: 2-30 ppm; mn: 2-30 ppm; the high-purity aluminum plate ingot further comprises: one or more of cerium, scandium, zirconium, vanadium, chromium, nickel, magnesium and tin, and the total content is 3-45 ppm. The high-purity aluminum plate ingot of the high-voltage anode aluminum foil for the electrolytic capacitor is prepared by using 100 wt% of segregation method primary raw materials and 0 wt% to 70 wt% of secondary raw materials, and the types and the contents of trace elements of the product are controlled.)

1. A high-purity plate ingot of high-voltage anode aluminum foil for electrolytic capacitors is characterized in that the high-purity plate ingot is prepared by 30-100 wt% of segregation primary raw materials and 0-70 wt% of secondary raw materials,

the high-purity aluminum plate ingot comprises: al: not less than 99.9 wt%; fe: 5-35 ppm; si: 5-35 ppm; cu: 10-100 ppm; pb: 0.2-3 ppm; b: 0.5-5 ppm; zn: 2-30 ppm; ga: 2-30 ppm; mn: 2-30 ppm;

the high-purity aluminum plate ingot further comprises: one or more of cerium, scandium, zirconium, vanadium, chromium, nickel, magnesium and tin, and the total content is 3-45 ppm.

2. A high purity slab ingot in accordance with claim 1,

the Pb content is 2-2.5 ppm.

3. A high purity slab ingot in accordance with claim 1,

the Zn content is 10-20 ppm.

4. A high purity slab ingot in accordance with claim 1,

the Mn content is 5-10 ppm.

5. A high purity slab ingot in accordance with claim 1,

the Ga content is 10-15 ppm.

6. A high purity slab ingot in accordance with claim 1,

the high-purity aluminum plate ingot further comprises: one or more of cerium, scandium, zirconium, vanadium, chromium, nickel, magnesium and tin, and the total content is 3-25 ppm.

7. A high-voltage anode aluminum foil for electrolytic capacitors, which is produced using the high-purity aluminum plate ingot as set forth in any one of claims 1 to 6.

8. An electrolytic capacitor produced using the anode aluminum foil according to claim 7.

Technical Field

The invention belongs to the technical field of aluminum product processing, and particularly relates to a high-purity slab ingot of a high-voltage anode aluminum foil for an electrolytic capacitor.

Background

The anode aluminum foil for the electrolytic capacitor is a main element for producing the capacitor, and the performance of the product directly determines the grade of the aluminum electrolytic capacitor. With the progress of miniaturization of aluminum electrolytic capacitors, the electrolytic capacitors are also required to have high capacity and high bending performance after being corroded with an anode aluminum foil. The electrolytic capacitor anode aluminum foil produced at present in China can not meet the performance requirements of high capacity and high bending on the market, particularly the Japanese high-end corrosion foil market, and is mainly the anode aluminum foil for the high-voltage electrolytic capacitor produced in Japan.

Disclosure of Invention

The invention aims to provide a high-purity plate ingot of a high-voltage anode aluminum foil for an electrolytic capacitor, which has the advantages of high capacity and high bending performance.

In order to realize the purpose, the adopted technical scheme is as follows:

a high-purity plate ingot of high-voltage anode aluminum foil for electrolytic capacitors is prepared from 30-100 wt% of segregation primary raw materials and 0-70 wt% of secondary raw materials;

the high-purity aluminum plate ingot comprises: al: not less than 99.9 wt%; fe: 5-35 ppm; si: 5-35 ppm; cu: 10-100 ppm; pb: 0.2-3 ppm; b: 0.5-5 ppm; zn: 2-30 ppm; ga: 2-30 ppm; mn: 2-30 ppm;

the high-purity aluminum plate ingot further comprises: one or more of cerium, scandium, zirconium, vanadium, chromium, nickel, magnesium and tin, and the total content is 3-45 ppm.

Further, the Pb content is 2-2.5 ppm.

Furthermore, the Zn content is 10-20 ppm.

Further, the Mn content is 5-10 ppm.

Further, the Ga content is 10-15 ppm.

Further, the high-purity aluminum plate ingot further comprises: one or more of cerium, scandium, zirconium, vanadium, chromium, nickel, magnesium and tin, and the total content is 3-25 ppm.

The invention also aims to provide a high-voltage anode aluminum foil for an electrolytic capacitor, which is prepared by adopting the high-purity aluminum plate ingot.

Still another object of the present invention is to provide an electrolytic capacitor prepared using the above-mentioned anode aluminum foil.

Compared with the prior art, the invention has the beneficial effects that:

1. the invention prepares the high-purity aluminum plate ingot by using 100 wt% of segregation method primary raw material and 0 wt% to 70 wt% of secondary raw material, namely, the segregation raw material and leftover materials or waste materials in the production process of the electronic aluminum foil are mainly used as raw materials to produce high-voltage electronic aluminum foil products, the waste is utilized, and the production cost can be reduced.

2. The method applies the pure segregation purified high-purity aluminum raw material and leftover materials and waste materials generated in the production process of the electronic aluminum foil to the production of the electronic aluminum foil, controls the types and the contents of trace elements of the product, and can obtain the high-capacity high-bending-performance corrosive foil for the electrolytic capacitor, wherein the (100) surface texture of the aluminum foil for the high-voltage anode electrolytic capacitor produced by the process accounts for more than 98 percent. The product capacity can reach 0.68uf/cm at 590Vf²The above.

Drawings

FIG. 1 is a scanning electron microscope image of the aluminum foil produced in example 2 after being corroded;

fig. 2 is a scanning electron microscope image of the aluminum foil produced in the comparative example after being corroded.

Detailed Description

In order to further illustrate the high-purity plate ingot of high-voltage anode aluminum foil for electrolytic capacitors, the anode aluminum foil, the electrolytic capacitor, the anode aluminum foil, and the electrolytic capacitor of the present invention, and to achieve the intended objects, the following detailed description of the high-purity plate ingot of high-voltage anode aluminum foil for electrolytic capacitors, the anode aluminum foil, the electrolytic capacitor, the anode aluminum foil, and the electrolytic capacitor, and the specific implementation manners, structures, characteristics, and effects thereof, will be made with reference to the preferred embodiments. In the following description, different "one embodiment" or "an embodiment" refers to not necessarily the same embodiment. Furthermore, the particular features, structures, or characteristics may be combined in any suitable manner in one or more embodiments.

The high-purity plate ingot of the high-voltage anode aluminum foil for the electrolytic capacitor, the anode aluminum foil, the electrolytic capacitor, the anode aluminum foil and the electrolytic capacitor of the invention will be further described in detail with reference to the following specific examples:

the present invention relates to a method for producing anode aluminum foil for electrolytic capacitor by using 30-100 wt% of segregated primary raw material and 0-70 wt% of secondary raw material (leftover material and waste material produced in the production process of anode aluminum foil) as raw material and controlling the content of trace elements in plate ingot, such as Pb, B, Zn, Ga and Mn, etc..

The technical scheme of the invention is as follows:

a high-purity plate ingot of high-voltage anode aluminum foil for electrolytic capacitors is prepared from 30-100 wt% of segregation primary raw materials and 0-70 wt% of secondary raw materials (leftover materials and the like generated in the production process of the anode aluminum foil);

the high-purity aluminum plate ingot comprises: al: not less than 99.9 wt%; fe: 5-35 ppm; si: 5-35 ppm; cu: 10-100 ppm; pb: 0.2-3 ppm; b: 0.5-5 ppm; zn: 2-30 ppm; ga: 2-30 ppm; mn: 2-30 ppm;

the high-purity aluminum plate ingot further comprises: one or more of cerium, scandium, zirconium, vanadium, chromium, nickel, magnesium and tin, and the total content is 3-45 ppm.

Preferably, the Pb content is 2 to 2.5 ppm. The Pb element is enriched under the oxidation film layer of the anode aluminum foil of the high-voltage electrolytic capacitor, and plays a role in determining initial corrosion pore formation of the high-voltage anode aluminum foil. The lack of Pb element or the absence of Pb element can lead to the lack of initial corrosion and pore formation of the high-voltage anode aluminum foil, and high-capacity high-voltage corrosion foil cannot be obtained. When the content of Pb element is high, initial corrosion is likely to occur in many pores, and a high-capacity corrosion foil cannot be obtained, and the bending property of the product is lowered.

Preferably, the Zn content is 10-20 ppm. Zn element is obviously enriched on the surface of the high-voltage anode aluminum foil, corrosion and pore formation of high-voltage products are promoted, and the capacity of the high-voltage corrosion foil is promoted. Meanwhile, Zn can promote the length of the hole of the high-pressure corrosion foil, and is beneficial to the capacity improvement of high-thickness high-capacity high-voltage electronic aluminum foil products. When the Zn content is too high, the corrosion and the pore formation on the surface of the high-voltage anode aluminum foil are more and obvious. Meanwhile, the hole length of the high-pressure corrosion foil is lengthened, which affects the bending performance and air permeability of the high-pressure corrosion foil.

Preferably, the Mn content is 5 to 10 ppm. Mn element plays a promoting role in corroding the hair holes of the product, certain Mn element can increase the aperture of the corroded hair holes, and the electrostatic capacity of the electronic aluminum foil product can be improved. However, if the Mn content is too high, corrosion and pores are likely to occur, resulting in uneven cell formation, a decrease in capacity, and a decrease in bendability.

Preferably, the Ga content is 10 to 15 ppm. The Ga element promotes corrosion hole formation of the high-voltage product, and the Ga element with a certain content can promote the corrosion hole formation of the product and improve the electrostatic capacity of the electronic aluminum foil product. Meanwhile, the Ga element can improve the aperture of a corroded hole of a high-pressure product and improve the capacity index in a high-voltage section. The Ga content can also prevent the high-voltage electronic aluminum foil product from forming coarse grains during annealing. When the content of Ga is too high, the surface is enriched, the over-corrosion phenomenon of the product occurs, and the high-capacity high-bending corrosion foil cannot be obtained.

Preferably, the high-purity aluminum ingot further comprises: one or more of cerium, scandium, zirconium, vanadium, chromium, nickel, magnesium and tin, and the total content is 3-25 ppm. The tin, zirconium and chromium can promote the pore diameter of the pores of the high-pressure corrosion foil and improve the capacity index of the high-pressure product in a high-voltage section. Cerium, scandium, vanadium, nickel and magnesium elements are enriched on the surface of the high-pressure product, and have a promoting effect on corrosion and pore formation of the high-pressure product. The existence of partial elements is beneficial to the grain refinement of the product and the improvement of the bending performance of the high-pressure product. When the content is too high, the high-pressure product has poor corrosion resistance, and holes are easy to be formed and transversely formed. Resulting in a reduction in the capacity of the product and insufficient bending properties.