CN101789314B - Aluminum foil for low-voltage electrolytic capacitor anode and production method thereof - Google Patents
Aluminum foil for low-voltage electrolytic capacitor anode and production method thereof Download PDFInfo
- Publication number
- CN101789314B CN101789314B CN2010101177000A CN201010117700A CN101789314B CN 101789314 B CN101789314 B CN 101789314B CN 2010101177000 A CN2010101177000 A CN 2010101177000A CN 201010117700 A CN201010117700 A CN 201010117700A CN 101789314 B CN101789314 B CN 101789314B
- Authority
- CN
- China
- Prior art keywords
- aluminum foil
- electrolytic capacitor
- casting
- low
- aluminium alloy
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Active
Links
Images
Landscapes
- Metal Rolling (AREA)
Abstract
The invention relates to an aluminum foil and a production method thereof, in particular to an aluminum foil for producing a low-voltage electrolytic capacitor anode by adopting a casting and rolling method, which belongs to the technical field of production of aluminum plates, bands and foils. By controlling the purity of Al and the contents of Cu, Fe, Si, Mg, Zn, Ga, Mn, Ce, B, Ti, Zr and V, excessive dissolution cannot be generated, etch pits are uniformly formed at high density and the surface expanding rate is increased, thereby the corrosive electrostatic capacity is increased; cold rolling plates with uniform components and uniform organization structure can be directly provided by adopting a casting and rolling method; component homogenizing and soaking treatments which are essential before the conventional hot rolling method are omitted, thereby shortening production procedures, reducing the energy consumption and improving the finished product rate; and the aluminum foil notonly can meet the performance requirements of the low-voltage electrolytic capacitor anode, but also can save energy sources for subsequent corrosive processing.
Description
Technical field
The invention belongs to metallurgical technology, belong to the production technology category of aluminium sheet, band, paper tinsel, particularly the manufacturing of aluminum foil for low-voltage electrolytic capacitor anode.
Background technology
Along with the development of electronic industrial technology, the miniaturization of the expansion of application, particularly complete machine has proposed new requirement to the static capacity and the manufacturing cost of wherein secondary capacitor, for example requires its static capacity big, and with low cost.Satisfying the demand side of this respect, the aluminum foil for capacitor anode material plays leading role.Nowadays; Usually the semicontinuous ingot casting that adopts; Aluminium foil through homogenizing annealing, hot rolling, technology cold rolling, that paper tinsel rolls are made high specific capacitance is gradually ripe, but because operation is many, energy consumption is big, efficient is low and rate of finished products is low, and can not satisfy the requirement of electrolytic capacitor miniaturization fully.For example described in disclosed patent application 200710142166.7 on April 16,2008 " aluminium foil for electrode of electrolytic capacitor "; Carry out the molten ingot casting of processing of aluminium alloy earlier; Homogenize with heating furnace then and handle and the evenly heating processing; Carry out hot rolling then, when cold rolling, carry out intermediate annealing in addition, last paper tinsel rolls into type.When adopting similar hot rolling technology; Because ingot casting cooled and solidified time in casting mold is long; Have more large dendritic crystal in the ingot casting, and a component segregation, this not only made before hot rolling ingot casting homogenized and is treated as an inevitable operation; Increased energy consumption, and made compositional modulation difficulty more.
Summary of the invention
The present invention seeks to through a kind of material of producing aluminum foil for low-voltage electrolytic capacitor anode that is exclusively used in is provided, and adopt casting-rolling method to produce, realized that operation is few; Energy consumption is low; The aluminium loss is few, the effect that lumber recovery is high, and the gained aluminium foil has higher ratio electric capacity than hot rolling method.
Product of the present invention in chemical composition in chemical composition; Al purity>=99.99%; Cu:7-57ppm, Fe:5-55ppm, Si:5-55ppm, Zn:1-40ppm, Mg:0.5-40ppm, Ga:0.5-40ppm, Mn:0.5-12ppm, Ce:0.5-12ppm, B :≤1.5ppm, Ti :≤1.5ppm, Zr :≤1.5ppm, V :≤1.5ppm, and unavoidable impurities; Further preferred: in chemical composition; Al purity: Cu:26-33ppm, Fe:16-25ppm, Si:19-27ppm, Zn:2-8ppm, Mg:15-35ppm, Ga:1-20ppm, Mn:1-10ppm, Ce:1-10ppm, B :≤1.5ppm, Ti :≤1.5ppm, Zr :≤1.5ppm, V :≤1.5ppm>=99.99%,, and unavoidable impurities;
Aluminum foil for low-voltage electrolytic capacitor anode with said components, process by the casting-rolling method that comprises the following steps:
1) aluminium alloy melting is prepared: with high-purity aluminium ingot fusing; Add and the adjustment alloying element content; Slagging-off, degasification, detect and the control aluminium alloy melting elemental constituent, and in the control aluminium alloy melting air content below 0.12 milliliter/100 gram aluminium alloy melting;
2) aluminium alloy melting of preparing is filtered;
3) aluminium alloy melting that will pass through filtration is directly inputted in the casting and rolling machine, and casting becomes the casting plate of a thickness between 8-9.5 millimeters, and is cooled to normal temperature;
4) the casting plate is cold-rolled to thickness between 4.0-5.0 millimeters;
5) homogenizing annealing between 450-570 ℃, temperature retention time 18-26 hours is cooled to normal temperature then;
6) the casting plate is cold-rolled to a predetermined thickness, this thickness is the reduction ratio that further paper tinsel rolls reservation 18-30%; Through controlled rolling speed, the casting plate temperature is controlled at below 75 ℃;
7) continue paper tinsel and be rolled to predetermined aluminum foil thickness; Roll speed through the control paper tinsel, the aluminium foil temperature is controlled at below 75 ℃.
Advantage of the present invention is through in aluminium, adding various coherent elements and adopting casting-rolling method, can directly provide composition the even and uniform cold rolled sheet of institutional framework; Necessary homogenization of composition and evenly heating handled before having practiced thrift conventional hot-rolling method; Thereby production process is shortened, and energy consumption reduces, and has improved lumber recovery; Prepared aluminium foil not only can satisfy the performance requirement of low-voltage electrolytic capacitor anode, can also process energy savings for subsequent corrosion.
Description of drawings
Fig. 1 is the process flow diagram of casting-rolling method of the present invention.
Embodiment
Below in conjunction with accompanying drawing characteristic of the present invention and correlated characteristic thereof are described further:
To make thickness is 0.12, and width is the aluminum foil for low-voltage electrolytic capacitor anode of 10mm
Al purity is 99.991% in chemical composition, Cu:27ppm, Fe:17ppm, Si:24ppm, Mg:17ppm, Zn:4ppm, Ga:6ppm, Mn:4ppm, Ce:3ppm, B:0.8ppm, Ti:0.6ppm, Zr:0.5ppm, V:0.9ppm.
As shown in Figure 1; With high-purity aluminium ingot heating and melting, add alloying element, the adjustment elemental composition; Concise then, put only, slagging-off, degasification; Make al alloy component in the target component scope of setting, the air content in the aluminium alloy melting restrains under the aluminium alloy melting the qualified aluminium alloy melting of promptly concise one-tenth 0.12 milliliter/100;
After then prepared qualified aluminium alloy melting being filtered through filter, directly deliver to the casting plate that rolls into the thickness of thickness between the 8-9.5 millimeter in the casting and rolling machine, for example 8.5 millimeters thick;
Be cooled to be further cold rolled to thickness between the 4-5 millimeter behind the normal temperature, for example 4.5 millimeters, to advance stove then and carry out homogenizing annealing, annealing temperature is between 450-570 ℃, and temperature retention time was at 18-26 hour; For example annealing temperature is set in 540 ℃, and temperature retention time is set at 20 hours; Be cooled to normal temperature then;
Then the casting plate is cold-rolled to a predetermined thickness, this thickness is the reduction ratio that further paper tinsel rolls reservation 18-30%; Through controlled rolling speed, the casting plate temperature is controlled at below 75 ℃ for example 70 ℃;
Continue paper tinsel and be rolled to predetermined aluminum foil thickness, the thickness that makes paper tinsel is within the deviation range of design; Roll speed through the control paper tinsel, the aluminium foil temperature is controlled at below 75 ℃ for example 70 ℃;
With the finished product paper tinsel of gained, grab sample after the corrosion and the processing of energizing, detects the characteristic of gained aluminium foil with its method than electric capacity of measurement.After the aluminium foil corrosion of this component energized, the ratio electric capacity during actual measurement 25V was 79 μ F/cm
2
The reason that composition limits in the explanation aluminium foil for electrode of electrolytic capacitor of the present invention below:
Cu:7ppm-57ppm
Cu exists with solid solution condition in aluminium, improves the spot corrosion property of aluminum foil material, makes the etch uniformity of main body improve, and the effect that improves the strength of materials is arranged in addition.But when if content is lower than 7ppm, then above-mentioned effect is insufficient; And content produced dissolving, uneven distribution when surpassing 100ppm, and can bring the problems such as reprocessing of fail safe hidden danger such as capacitor short-circuit and corrosive liquid; Based on same reason, preferred Cu content range is at 7-57ppm;
Fe:5ppm-55ppm
Fe has the effect of the precipitate that forms the etching starting point in aluminium, to contain element indispensably.If content is less than 5ppm, then can not play one's part to the full; Owing to high-purityization, cost increases in addition.On the other hand, if content surpasses 55ppm, when final annealing, can produce excessive Al-Fe is precipitate, when corrosion, will produce dissolving, causes the pit skewness that produces, thereby makes the static capacity reduction.Based on same reason, preferred Fe content range is at 5-55ppm;
Si:5ppm-55ppm
It is precipitate that Si can form Al-Fe-Ni-Si with Fe, Ni, Al, purifies the rafifinal matrix, increases the ratio of (100) < 001>texture, has the effect of the overgrowth of crystals when preventing recrystallization again.If content is less than 5ppm, then the absolute magnitude of Si is few, can not bring into play above-mentioned effect; If when surpassing 55ppm, then produce excessive separating out, the pit skewness of generation caused dissolving during corrosion, and static capacity is reduced.Based on same reason, preferred Si content range is at 5-55ppm;
Zn:1ppm-40ppm
Zn exists with solid solution condition in Al, has the main body of making current potential and reduces, and increase is that precipitate and Al-(Fe, Ni) are the effect of the potential difference of precipitate with Al-Fe, makes the easier and surperficial etching of corrosion more even.If content then lacks this effect less than 1ppm, surface dissolution increases when surpassing 40ppm.Based on same reason, preferred Zn content range is between 1-40ppm;
Ga:0.5ppm-40ppm
Identical with the effect of Zn element; In Al, exist with solid solution condition, have the main body of making current potential and reduce, increase is that precipitate and Al-(Fe, Ni) are the effect of the potential difference of precipitate with Al-Fe; Make the easier and surperficial etching of corrosion more even; Through using Ga, can reduce the use amount of Zn simultaneously, reduce total impurities.If content then lacks this effect less than 0.5ppm, surface dissolution increases when surpassing 40ppm; Based on same reason, preferred Ga content range is at 0.5-40ppm;
Mg:0.5ppm-40ppm
Identical with the effect of Ga element, can make surface etching more even.If content less than 0.5ppm, then lacks effect, surpass 40ppm, can cause dissolving; Based on same reason, preferred Mg content range is at 0.5-40ppm;
Mn:0.5ppm-12ppm
Identical with the effect of Ga element, can make surface etching more even.If content less than 0.5ppm, then lacks effect, surpass 12ppm, can cause dissolving; Based on same reason, preferred Mn content range is at 0.5-12ppm;
Ce:0.5ppm-12ppm
Identical with the effect of Ga element, can make surface etching more even.If content less than 0.5ppm, then lacks effect, surpass 12ppm, can cause dissolving; Based on same reason, preferred Mn content range is at 0.5-12ppm.
And use B, Ti, Zr and V in alloy, all to have the effect that improves pit corrosion density on a small quantity.If content surpasses 1ppm, then exist to produce mutual chemical combination, concentration of local produces the risk of pit; Therefore the content with these elements all is limited in below the 1ppm.According to the component and the casting-rolling method of aluminum foil for low-voltage electrolytic capacitor anode material provided by the invention, not only operation is simple, and energy consumption is low, and lumber recovery has by a relatively large margin manufacturing cost and reduces above 85%.
Claims (3)
1. aluminum foil for low-voltage electrolytic capacitor anode; It is characterized in that; In chemical composition; Al purity>=99.99%, Cu:7-57ppm, Fe:5-55ppm, Si:5-55ppm, Zn:1-40ppm, Mg:0.5-40ppm, Ga:0.5-40ppm, Mn:0.5-12ppm, Ce:0.5-12ppm, B :≤1.5ppm, Ti :≤1.5ppm, Zr :≤1.5ppm, V :≤1.5ppm, and unavoidable impurities.
2. aluminum foil for low-voltage electrolytic capacitor anode according to claim 1; It is characterized in that; In chemical composition; Al purity: Cu:26-33ppm, Fe:16-25ppm, Si:19-27ppm, Zn:2-8ppm, Mg:15-35ppm, Ga:1-20ppm, Mn:1-10ppm, Ce:1-10ppm, B :≤1.5ppm, Ti :≤1.5ppm, Zr :≤1.5ppm, V :≤1.5ppm>=99.99%,, and unavoidable impurities.
3. the production method of aluminum foil for low-voltage electrolytic capacitor anode according to claim 1 and 2 is characterized in that, by comprising the following steps:
1) aluminium alloy melting is prepared: with high-purity aluminium ingot fusing; Add and the adjustment alloying element content; Slagging-off, degasification detect and control the elemental constituent of aluminium alloy melting, and air content restrains below the aluminium alloy melting 0.12 milliliter/100 in the control aluminium alloy melting;
2) aluminium alloy melting of preparing is filtered;
3) aluminium alloy melting that will pass through filtration is directly inputted in the casting and rolling machine, and casting becomes the casting plate of a thickness between 8-9.5 millimeters, and is cooled to normal temperature;
4) the casting plate is cold-rolled to thickness between 4.0-5.0 millimeters;
5) homogenizing annealing between 450-570 ℃, temperature retention time 18-26 hours is cooled to normal temperature then;
6) the casting plate is cold-rolled to a predetermined thickness, this thickness is the reduction ratio that further paper tinsel rolls reservation 18-30%; Through controlled rolling speed, the casting plate temperature is controlled at below 75 ℃;
7) continue paper tinsel and be rolled to predetermined aluminum foil thickness; Roll speed through the control paper tinsel, the aluminium foil temperature is controlled at below 75 ℃.
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
CN2010101177000A CN101789314B (en) | 2010-03-04 | 2010-03-04 | Aluminum foil for low-voltage electrolytic capacitor anode and production method thereof |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
CN2010101177000A CN101789314B (en) | 2010-03-04 | 2010-03-04 | Aluminum foil for low-voltage electrolytic capacitor anode and production method thereof |
Publications (2)
Publication Number | Publication Date |
---|---|
CN101789314A CN101789314A (en) | 2010-07-28 |
CN101789314B true CN101789314B (en) | 2012-05-30 |
Family
ID=42532485
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
CN2010101177000A Active CN101789314B (en) | 2010-03-04 | 2010-03-04 | Aluminum foil for low-voltage electrolytic capacitor anode and production method thereof |
Country Status (1)
Country | Link |
---|---|
CN (1) | CN101789314B (en) |
Families Citing this family (6)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
CN102766831A (en) * | 2012-08-01 | 2012-11-07 | 内蒙古包钢钢联股份有限公司 | Method for improving cubic texture occupancy rate of aluminum foil |
CN104124064B (en) * | 2014-06-10 | 2017-12-26 | 新疆众和股份有限公司 | Produce high-purity aluminum-sheet ingot and anode aluminium foil, the electrolytic capacitor of anode aluminum foil of electrolytic capacitor |
CN104131198B (en) * | 2014-08-01 | 2018-07-24 | 内蒙古中拓铝业股份有限责任公司 | Rare-earth electric aluminium foil |
CN107312953B (en) * | 2017-06-07 | 2018-11-20 | 烟台南山学院 | A kind of ultra-thin double-zero aluminum foil and preparation method thereof |
CN107916381B (en) * | 2017-11-30 | 2019-06-14 | 宁波博恩电气有限公司 | Aluminium foil used in capacitor annealing device |
CN107893203B (en) * | 2017-11-30 | 2019-06-14 | 宁波博恩电气有限公司 | Capacitor aluminium sheet homogenizing annealing method |
Family Cites Families (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JP2002118035A (en) * | 2000-07-31 | 2002-04-19 | Showa Denko Kk | Electrolytic capacitor electrode aluminum foil |
CN1121506C (en) * | 2001-09-06 | 2003-09-17 | 北京南辰秀普金属材料研究所 | Production process of aluminium foil for high-voltage anode of electrolytic capacitor |
CN101425382A (en) * | 2007-11-01 | 2009-05-06 | 北京伟豪铝业有限责任公司 | Environment protection type high pressure anode foil for electrolytic capacitor |
-
2010
- 2010-03-04 CN CN2010101177000A patent/CN101789314B/en active Active
Also Published As
Publication number | Publication date |
---|---|
CN101789314A (en) | 2010-07-28 |
Similar Documents
Publication | Publication Date | Title |
---|---|---|
CN101719423B (en) | Aluminum foil for high-voltage electrolytic capacitor anodes and production method | |
CN111793759B (en) | 1070 high-performance aluminum foil for lithium ion battery and preparation method thereof | |
CN111893351B (en) | Aluminum foil for 1235D lithium battery and preparation method thereof | |
CN101789314B (en) | Aluminum foil for low-voltage electrolytic capacitor anode and production method thereof | |
CN101733275B (en) | Production method of aluminium foil for electrode of electrolytic capacitor | |
CN106811628B (en) | A kind of method of casting and roll process production power battery case aluminium strip | |
CN108315606A (en) | A kind of lithium battery 1100 alloy aluminium foils and its manufacturing method | |
CN102796922B (en) | Alloy cathode foil which is special for capacitor and produced by continuous roll casting method and preparation method | |
CN111254322B (en) | Preparation method of aluminum foil material for thinning double-sided photocell tab | |
CN101859648B (en) | Aluminium foil for high-voltage electrolytic capacitor anodes and production method | |
CN102959107A (en) | Cu-Ga alloy, and Cu-Ga alloy sputtering target | |
WO2021046927A1 (en) | Nickel-rhenium alloy rotary tubular target material containing trace rare earth elements and preparation method therefor | |
CN101770871B (en) | Aluminum foil for capacitor anode and production method | |
CN104245980A (en) | Aluminum alloy foil for electrode charge collector, and method for producing same | |
CN101792875B (en) | Aluminum foil and production method thereof | |
CN112831692A (en) | Aluminum-manganese alloy strip and preparation method thereof | |
CN112281028A (en) | Aluminum foil for electrolytic capacitor and production method thereof | |
CN102851551A (en) | Aluminum alloy evaporator inner wall thin plate and continuous casting rolling production process thereof | |
CN101789313B (en) | Aluminum foil for electrolytic capacitor anode and production method thereof | |
CN101877278B (en) | Aluminum foil for medium-voltage electrolytic capacitor anode and method for producing same | |
CN111500899B (en) | Aluminum material containing rare earth elements for explosion-proof membrane and manufacturing method thereof | |
JP2007126717A (en) | Aluminum alloy foil having excellent strength and surface roughening resistance and method for producing the same | |
CN117004837A (en) | Ultrathin aluminum foil and preparation method and application thereof | |
CN114411017B (en) | Aluminum foil for 1200 lithium battery and preparation method thereof | |
CN114277286B (en) | High-tensile-strength and high-extensibility aluminum foil for power lithium battery and preparation method thereof |
Legal Events
Date | Code | Title | Description |
---|---|---|---|
C06 | Publication | ||
PB01 | Publication | ||
C10 | Entry into substantive examination | ||
SE01 | Entry into force of request for substantive examination | ||
C14 | Grant of patent or utility model | ||
GR01 | Patent grant | ||
C56 | Change in the name or address of the patentee |
Owner name: BEIJING CHN-TOP MACHINERY GROUP CO., LTD. Free format text: FORMER NAME: BEIJING CHN-TOP MACHINERY CO., LTD. |
|
CP03 | Change of name, title or address |
Address after: 102208 Beijing, Huilongguan, Beijing, Changping District Billiton machinery Refco Group Ltd Patentee after: Co., Ltd of mechanical group is opened up in Beijing Address before: 102208 Beijing, Huilongguan, Beijing, China Billiton Machinery Co., Ltd. Patentee before: Beijing Chn-Top Machinery Co., Ltd. |