JPH03291363A - Production of aluminum foil for electrolytic capacitor cathode - Google Patents
Production of aluminum foil for electrolytic capacitor cathodeInfo
- Publication number
- JPH03291363A JPH03291363A JP1393890A JP1393890A JPH03291363A JP H03291363 A JPH03291363 A JP H03291363A JP 1393890 A JP1393890 A JP 1393890A JP 1393890 A JP1393890 A JP 1393890A JP H03291363 A JPH03291363 A JP H03291363A
- Authority
- JP
- Japan
- Prior art keywords
- aluminum
- foil
- ingot
- aluminum foil
- electrolytic capacitor
- 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.)
- Granted
Links
- 229910052782 aluminium Inorganic materials 0.000 title claims abstract description 70
- 239000011888 foil Substances 0.000 title claims abstract description 42
- 239000003990 capacitor Substances 0.000 title claims abstract description 17
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 title claims description 69
- 238000004519 manufacturing process Methods 0.000 title claims description 11
- 238000000034 method Methods 0.000 claims abstract description 34
- 238000000137 annealing Methods 0.000 claims abstract description 19
- 239000000203 mixture Substances 0.000 claims abstract description 13
- 238000005098 hot rolling Methods 0.000 claims abstract description 11
- 238000005097 cold rolling Methods 0.000 claims abstract description 10
- 238000000265 homogenisation Methods 0.000 claims description 9
- 239000000463 material Substances 0.000 claims description 9
- 238000005096 rolling process Methods 0.000 claims description 6
- 238000005530 etching Methods 0.000 abstract description 6
- 239000002244 precipitate Substances 0.000 description 9
- 230000000052 comparative effect Effects 0.000 description 8
- 239000012535 impurity Substances 0.000 description 6
- 230000000694 effects Effects 0.000 description 5
- VEXZGXHMUGYJMC-UHFFFAOYSA-N Hydrochloric acid Chemical compound Cl VEXZGXHMUGYJMC-UHFFFAOYSA-N 0.000 description 4
- MUBZPKHOEPUJKR-UHFFFAOYSA-N Oxalic acid Chemical compound OC(=O)C(O)=O MUBZPKHOEPUJKR-UHFFFAOYSA-N 0.000 description 3
- 239000007864 aqueous solution Substances 0.000 description 3
- QAOWNCQODCNURD-UHFFFAOYSA-N Sulfuric acid Chemical compound OS(O)(=O)=O QAOWNCQODCNURD-UHFFFAOYSA-N 0.000 description 2
- 229910052802 copper Inorganic materials 0.000 description 2
- 230000007423 decrease Effects 0.000 description 2
- 238000004090 dissolution Methods 0.000 description 2
- 239000006104 solid solution Substances 0.000 description 2
- GRYLNZFGIOXLOG-UHFFFAOYSA-N Nitric acid Chemical compound O[N+]([O-])=O GRYLNZFGIOXLOG-UHFFFAOYSA-N 0.000 description 1
- 238000001816 cooling Methods 0.000 description 1
- 238000005868 electrolysis reaction Methods 0.000 description 1
- 229910017604 nitric acid Inorganic materials 0.000 description 1
- 235000006408 oxalic acid Nutrition 0.000 description 1
- 239000011148 porous material Substances 0.000 description 1
- 230000001376 precipitating effect Effects 0.000 description 1
- 238000001556 precipitation Methods 0.000 description 1
- 238000004381 surface treatment Methods 0.000 description 1
- 229910052725 zinc Inorganic materials 0.000 description 1
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21B—ROLLING OF METAL
- B21B1/00—Metal-rolling methods or mills for making semi-finished products of solid or profiled cross-section; Sequence of operations in milling trains; Layout of rolling-mill plant, e.g. grouping of stands; Succession of passes or of sectional pass alternations
- B21B1/40—Metal-rolling methods or mills for making semi-finished products of solid or profiled cross-section; Sequence of operations in milling trains; Layout of rolling-mill plant, e.g. grouping of stands; Succession of passes or of sectional pass alternations for rolling foils which present special problems, e.g. because of thinness
Abstract
Description
本発明は、静電容量の高い陰極を得ることのできる電解
コンデンサ陰極用アルミニウム箔の製造方法に関するも
のである。The present invention relates to a method for manufacturing an aluminum foil for an electrolytic capacitor cathode, which makes it possible to obtain a cathode with high capacitance.
従来より、電解コンデンサ陰極用アルミニウム箔を製造
する方法としては、一般のアルミニウム箔の製造方法と
同様の方法が採用されていた。即ち１．アルミニウム鋳
塊を面前、均質化処理、熱間圧延、中間焼鈍及び冷間圧
延して製造していた。
しかし、このようにして得られた電解コンデンサ陰極用
アルミニウム箔は、エツチング処理してコンデンサの陰
極として用いたとき、静電容量が低いという欠点があっ
た。これは、アルミニウム箔中に不純物（ＦｅやＳｉ等
）が析出若しくは晶出しており、これがエツチング時に
局部電池のカソードとして働き、アルミニウム箔表面に
過溶解を生じさせるからである。過溶解が生じると、ア
ルミニウム箔表面に大きな孔が形成されて、表面積の十
分な拡大が図れず、高い静電容量の陰極が得られないの
である。
この欠点を除去するためには、アルミニウム箔中に不純
物の析出等が生しないようにすればよい。
従って、従来よりアルミニウム鋳塊を高温で均質化処理
して不純物を固溶させたり、また固溶した不純物が析出
しないように、熱間圧延中に析出する温度領域を速く通
過させて圧延したりしている。
しかしながら、それでもなお十分に静電容量を高めるこ
とができなかった。Conventionally, as a method for manufacturing aluminum foil for an electrolytic capacitor cathode, a method similar to that for manufacturing general aluminum foil has been adopted. Namely 1. The aluminum ingot was manufactured by subjecting it to surface treatment, homogenization treatment, hot rolling, intermediate annealing, and cold rolling. However, the thus obtained aluminum foil for an electrolytic capacitor cathode had a drawback of low capacitance when it was etched and used as a capacitor cathode. This is because impurities (Fe, Si, etc.) are precipitated or crystallized in the aluminum foil, which acts as a cathode of a local battery during etching, causing excessive dissolution on the surface of the aluminum foil. When overdissolution occurs, large pores are formed on the surface of the aluminum foil, making it impossible to sufficiently expand the surface area and making it impossible to obtain a cathode with high capacitance. In order to eliminate this drawback, it is sufficient to prevent the precipitation of impurities in the aluminum foil. Therefore, in the past, aluminum ingots have been homogenized at high temperatures to dissolve impurities, and in order to prevent the dissolved impurities from precipitating, the aluminum ingots have been rolled quickly through the temperature range where they precipitate. are doing. However, it was still not possible to sufficiently increase the capacitance.
本発明者等は、上記の原因を究明すべく、種々検討した
結果、以下の如き知見を得た。即ち、アルミニウム鋳塊
のアルミニウム純度にもよるが、アルミニウム純度が高
いと均質化処理により却って析出物等が生じること、及
び熱間圧延終了後に急冷しても、その際の材料の寸法が
大きいと、材料の温度は急速に低下せず、析出物等が生
じること、という知見を得たのである。
そこで、本発明はこの知見に基づき、ある特定のアルミ
ニウム鋳塊を用い且つある特定の方法で電解コンデンサ
用アルミニウム箔を製造することにより、エツチング時
に過溶解が生じにくく、静電容量の高い陰極を得ること
ができる電解コンデンサ用アルミニウム箔を提供しよう
というものである。The present inventors conducted various studies in order to investigate the above-mentioned causes, and as a result, they obtained the following knowledge. In other words, it depends on the aluminum purity of the aluminum ingot, but if the aluminum purity is high, precipitates may be formed during the homogenization treatment, and even if the material is rapidly cooled after hot rolling, if the material is large in size, They obtained the knowledge that the temperature of the material does not drop rapidly and that precipitates are formed. Based on this knowledge, the present invention uses a specific aluminum ingot and manufactures aluminum foil for electrolytic capacitors using a specific method, thereby creating a cathode with high capacitance that is less prone to over-dissolution during etching. The purpose is to provide an aluminum foil for electrolytic capacitors that can be obtained.
【課題を解決するための手段及び作用】即ち、本発明は
基本的には、アルミニウム鋳塊を、面削工程，均質化処
理工程、熱間圧延工程。
中間焼鈍工程及び冷間圧延工程に通してアルミニウム箔
を得る方法において、前記アルミニウム鋳塊としである
特定の組成のものを用い、前記均質化処理工程及び中間
焼鈍゛工程を省略すると共に温度２５０℃以下で熱間圧
延を行うことを特徴とする電解コンデンサ陰極用アルミ
ニウム箔の製造方法に関するものである。
本発明において使用する第一のアルミニウム鋳塊の組成
は、Ｆｅ ０．０１０〜０．０７０％、 Ｓｉ ０．０
１０〜０゜１００％、 ４１９９．７％以上からなるも
のである。ここで、ＦｅやＳｉの量が０．０１０％未満
になると、得られるアルミニウム箔の強度が低く、実用
可能な陰極箔が得られないため、好ましくない。また、
ＦｅＯ量が０．０７０％を超えたり、或いはＳｉの量が
０．１００％を超えると、本発明の製造方法においても
析出物等が多量に生し、静電容量の高い陰極が得られな
くなるため、好ましくない。また、アルミニウム純度は
、低温即ち２５０℃以下でも圧延によって十分に望性加
工できる程度に高くした。なお、アルミニウム鋳塊中に
、Ｆｅ及びＳｉＯ外に不可避的不純物（例えば、Ｚｎや
Ｍｇ等）が若干量添加、含有されていてもよいことは勿
論である。
また、本発明において使用する第二のアルミニウム鋳塊
の組成は、Ｆｅ ０．０１０〜０．２００％、 Ｓｉ
０．０１０〜０．２５０％、 Ｃｕ ０．２〜０．５％
、へ１９９．０％以上からなるものである。この第二の
アルミニウム鋳塊は、第一のアルミニウム鋳塊と異なっ
て、Ｃｕが添加されている。Ｃｕを一定量添加すると、
基地の電位が高くなって、エツチングが良好に行われる
と共に、基地にＣｕがよく固溶して材料の強度向上が図
れる。即ち、Ｆｅが０．２００％を超えたり、或いはＳ
４が０．２５０％を超えたりすると、析出物等が生じや
すくなり、好ましくない。また、ＦｅやＳｉＯ量を一定
量以上としたのは、第一のアルミニウム鋳塊の場合と同
様の理由である。なお、Ｃｕが０．２％未満であると、
強度向上の効果があまり現れず、またＣｕが０．５ＯＡ
を超えると、陰極箔としての耐久性が劣ることや、エツ
チング形態が容量の出にくい形態になる可能性があるた
め、好ましくない。また、アルミニウム純度も、低温即
ち２５０℃以下でも圧延によって十分に塑性変形しうる
程度に高くした。なお、第二のアルミニウム鋳塊中にも
、Ｆｅ。
Ｓｉ及びＣｕの外に不可避的不純物（例えば、ＺｎやＭ
ｇ等）が若干量混入していてもよいことは勿論である。
また、本発明で使用するこれらのアルミニウム鋳塊の寸
法は任意に決定しうる事項であるが、比較的寸法の大き
い鋳塊を使用することができ、−船釣には厚さ１００ｍ
ｍ以上、好ましくは４００ｍｍ程度の鋳塊を用いること
ができる。
次に、これらのアルミニウム鋳塊に均質化処理を施すこ
となく、圧延を施す。本発明で使用するアルミニウム鋳
塊の場合、アルミニウム純度が比較的高いため、均質化
処理すると却って析出物等が生じるからである。本発明
においては、いずれの圧延工程でも鋳塊若しくは厚板の
材料温度を２５０℃以下にする必要がある。圧延中の材
料温度が２５０℃を超えると、圧延中に析出物が生じる
恐れがあるからである。
この後、中間焼鈍を施すことなく、冷間圧延を施す。中
間焼鈍も２５０℃を超える温度で行われるため、析出物
等が生じるからである。しかしながら、第二のアルミニ
ウム鋳塊を使用した場合には、添加したＣｕをよく固溶
させるため、中間焼鈍を施す。この場合の中間焼鈍の条
件は、板厚６ｍｍ以下。
温度２００℃以上８時間５時間以上とすることが必要で
ある。板厚が６ｍｍを超えると、材料の冷却が緩やかに
なって、析出物等が生じる恐れがあるので好ましくない
。また、温度が２００℃以下であったり、或いは時間が
５時間未満であると、焼鈍の効果が現れないので好まし
くない。この中間焼鈍によって、材料が柔らかくなり圧
延しやすくなり、またＣｕの固溶が十分になる。そして
、この後冷間圧延が施される。冷間圧延は、任意の回数
行われ、アルミニウム箔が所望の厚さになるようにＴる
。
以上のようにして、電解コンデンサ陰極用アルミニウム
箔が得られ、これをエツチング処理して陰極箔として使
用するのである。[Means and operations for solving the problems] That is, the present invention basically involves processing an aluminum ingot through a facing process, a homogenizing process, and a hot rolling process. In the method of obtaining aluminum foil through an intermediate annealing step and a cold rolling step, the aluminum ingot is of a specific composition, the homogenization step and the intermediate annealing step are omitted, and the temperature is 250°C. The present invention relates to a method for manufacturing an aluminum foil for an electrolytic capacitor cathode, which is characterized in that hot rolling is performed as follows. The composition of the first aluminum ingot used in the present invention is Fe 0.010-0.070%, Si 0.0%.
10~0°100%, 4199.7% or more. Here, if the amount of Fe or Si is less than 0.010%, the strength of the aluminum foil obtained is low and a practically usable cathode foil cannot be obtained, which is not preferable. Also,
If the amount of FeO exceeds 0.070% or the amount of Si exceeds 0.100%, a large amount of precipitates will occur even in the production method of the present invention, making it impossible to obtain a cathode with high capacitance. Therefore, it is not desirable. Further, the aluminum purity was set high enough to allow desired processing by rolling even at low temperatures, that is, 250° C. or lower. It goes without saying that some amount of unavoidable impurities (for example, Zn, Mg, etc.) may be added or contained in the aluminum ingot in addition to Fe and SiO. Further, the composition of the second aluminum ingot used in the present invention is Fe 0.010-0.200%, Si
0.010-0.250%, Cu 0.2-0.5%
, 199.0% or more. This second aluminum ingot differs from the first aluminum ingot in that Cu is added thereto. When a certain amount of Cu is added,
The potential of the base becomes high and etching is performed well, and Cu is well dissolved in the base to improve the strength of the material. That is, if Fe exceeds 0.200% or S
If 4 exceeds 0.250%, precipitates are likely to occur, which is not preferable. Further, the reason why the amount of Fe and SiO is set to be a certain amount or more is the same as in the case of the first aluminum ingot. In addition, if Cu is less than 0.2%,
The effect of improving strength does not appear much, and Cu is 0.5OA.
Exceeding this is not preferable because the durability of the cathode foil may be poor and the etched form may be such that it is difficult to produce a capacity. Furthermore, the aluminum purity was made high enough to allow sufficient plastic deformation by rolling even at low temperatures, that is, 250° C. or lower. Note that the second aluminum ingot also contains Fe. In addition to Si and Cu, unavoidable impurities (such as Zn and M
It goes without saying that a small amount of g, etc.) may be mixed in. Furthermore, although the dimensions of these aluminum ingots used in the present invention can be determined arbitrarily, ingots with relatively large dimensions can be used; - 100 m thick for boat fishing;
It is possible to use an ingot having a diameter of 100 mm or more, preferably about 400 mm. Next, these aluminum ingots are rolled without being homogenized. This is because the aluminum ingot used in the present invention has a relatively high aluminum purity, so if it is homogenized, precipitates and the like will be generated. In the present invention, it is necessary to keep the material temperature of the ingot or thick plate at 250° C. or lower in any rolling process. This is because if the temperature of the material during rolling exceeds 250°C, there is a risk that precipitates will form during rolling. After this, cold rolling is performed without performing intermediate annealing. This is because intermediate annealing is also performed at a temperature exceeding 250° C., so that precipitates and the like are generated. However, when the second aluminum ingot is used, it is subjected to intermediate annealing in order to form a solid solution of the added Cu. In this case, the condition for intermediate annealing is that the plate thickness is 6 mm or less. It is necessary to keep the temperature at 200° C. or higher for 8 hours or more for 5 hours or more. If the plate thickness exceeds 6 mm, cooling of the material becomes slow and there is a possibility that precipitates may be formed, which is not preferable. Further, it is not preferable that the temperature is 200° C. or less or the time is less than 5 hours, since the effect of annealing will not appear. This intermediate annealing makes the material soft and easy to roll, and also ensures sufficient solid solution of Cu. After this, cold rolling is performed. Cold rolling is performed an arbitrary number of times until the aluminum foil has a desired thickness. In the manner described above, an aluminum foil for an electrolytic capacitor cathode is obtained, which is then etched and used as a cathode foil.
【実施例】
実施例１
第１表に示す組成を持つ厚さ４００ｍｍの第一のアルミ
ニウム鋳塊を、２５０℃に予熱した後、第２表に示した
温度条件で熱間粗圧延して厚さ２０〜２５０に圧延し、
続いて第２表に示した温度条件で熱間仕上圧延して厚さ
７■に圧延してコイル状に巻き上げた。この後、コイル
状に巻き上げたアルミニウム板を、巻き戻して冷間圧延
し、厚さ２０μｍ又は５０μｍのアルミニウム箔とした
。このアルミニウム箔の静電容量を測定し、第２表に示
した。
（以下余白）
第１表
（以下余白）
第２表
（注）
１）静電容量は、次のようにして測定した。
即ち、得られたアルミニウム箔を、４．５％塩酸及び０
．５％蓚酸の水溶液中で電流密度Ｑ、３Ａ／ａｌｌの交
流で２分間電解工・ノチングした後、Ｏｖｆ、の静電容
量を測定した。
以上の結果から実施例と比較例を比較すると、高温で均
質化処理するよりしない方が（比較例ＩＡ）、２５０℃
を超える温度で熱間圧延を開始するより、２５０℃以下
で開始した方が（比較例１−Ａ、１−Ｂ、１−Ｃ） 、
静電容量が向上していることが判る。
また、その他の条件が同一でも、アルミニウム鋳塊の組
成中ＦｅやＳｔの量が多すぎても（比較例１−Ｄ）、静
電容量が低下していることが判る。
実施例２
第３表に示す組成を持つ厚さ４００ｍｍの第二のアルミ
ニウム鋳塊を、２５０℃に予熱した後、第４表に示した
温度条件で粗圧延して厚さ２０〜２５ｍｍに圧延し、続
いて第４表に示した温度条件で厚さ７鵬に圧延してコイ
ル状に巻き上げた。この後、冷間で箔圧延し、厚さ２０
μｍ又は５０μｍのアルミニウム箔とした。このアルミ
ニウム箔の静電容量を測定し、第５表に示した。なお、
中間焼鈍を行う場合は、冷間圧延の途中で（板厚が０．
３〜６１ＴＩＤＩで）行った。
第３表
（以下余白）
第４表
第５表
（注）
２）静電容量は次のようにして測定した。即ち、得られ
たアルミニウム箔を、３．５％塩酸及び０．０３％硫酸
の水溶液中で電流密度０．２Ａ／Ｃｌ１ｌの直流で１分
１５秒間電解エツチングした。このエンチング処理後の
試料２枚（大きさは１ ｃｍ Ｘ ２（−ｍ）を８，３
％硝酸水溶液中に浸漬して、Ｏｖｆ、の静電容量を測定
した。
以上の結果から実施例と比較例を比較する、高温で均質
化処理するよりしない方が（比較例２−Ａ）、２５０℃
を超える温度で熱間圧延を開始するより、２５０℃以下
で開始した方が（比較例２−Ａ、２−Ｂ。
２−ＣＬ静電容量が向上していることが判る。また、そ
の他の条件が同一でも、アルミニウム鋳塊の組成中Ｆｅ
の量が多すぎても（比較例２−Ｄ ） 、静電容量が低
下していることが判る。[Example] Example 1 A first aluminum ingot with a thickness of 400 mm having the composition shown in Table 1 was preheated to 250°C, and then hot rough rolled under the temperature conditions shown in Table 2 to reduce the thickness. Rolled to a diameter of 20 to 250,
Subsequently, it was hot finish rolled under the temperature conditions shown in Table 2 to a thickness of 7 cm and wound into a coil. Thereafter, the aluminum plate wound into a coil shape was unwound and cold rolled to obtain an aluminum foil having a thickness of 20 μm or 50 μm. The capacitance of this aluminum foil was measured and shown in Table 2. (The following is a margin) Table 1 (The following is a margin) Table 2 (Note) 1) Capacitance was measured as follows. That is, the obtained aluminum foil was soaked in 4.5% hydrochloric acid and 0.
．． After electrolysis and notching in an aqueous solution of 5% oxalic acid at a current density Q and an alternating current of 3 A/all for 2 minutes, the capacitance of Ovf was measured. Comparing the Examples and Comparative Examples from the above results, it is better to not homogenize at high temperature than to do it (Comparative Example IA) at 250°C.
(Comparative Examples 1-A, 1-B, 1-C)
It can be seen that the capacitance has improved. Furthermore, even if the other conditions are the same, it can be seen that even if the amount of Fe or St in the composition of the aluminum ingot is too large (Comparative Example 1-D), the capacitance decreases. Example 2 A second aluminum ingot with a thickness of 400 mm having the composition shown in Table 3 was preheated to 250°C, and then roughly rolled to a thickness of 20 to 25 mm under the temperature conditions shown in Table 4. Then, it was rolled to a thickness of 7 mm under the temperature conditions shown in Table 4 and wound into a coil. After this, the foil is cold rolled to a thickness of 20 mm.
It was made into aluminum foil of μm or 50 μm. The capacitance of this aluminum foil was measured and shown in Table 5. In addition,
When performing intermediate annealing, it is necessary to perform intermediate annealing in the middle of cold rolling (when the plate thickness is 0.
3 to 61 TIDI). Table 3 (blank below) Table 4 Table 5 (note) 2) Capacitance was measured as follows. That is, the obtained aluminum foil was electrolytically etched for 1 minute and 15 seconds in an aqueous solution of 3.5% hydrochloric acid and 0.03% sulfuric acid with direct current at a current density of 0.2 A/1 liter of Cl. Two samples after this etching treatment (size: 1 cm x 2 (-m))
% nitric acid aqueous solution, and the capacitance of Ovf was measured. From the above results, comparing the example and the comparative example, it is better not to homogenize at high temperature than at 250°C (comparative example 2-A).
It can be seen that the capacitance of 2-CL is improved when hot rolling is started at 250°C or lower than at a temperature exceeding 250°C (Comparative Examples 2-A, 2-B. 2-CL). Even if the conditions are the same, Fe in the composition of the aluminum ingot
It can be seen that even if the amount of is too large (Comparative Example 2-D), the capacitance decreases.
以上説明したように、本発明は、ある特定の組成を持つ
アルミニウム鋳塊を用いて、ある特定の方法で電解コン
デンサ陰極用アルミニウム箔を製造するというものであ
る。このようにして得られた電解コンデンサ陰極用アル
ミニウム箔を用いて、エツチング処理し陰極を得ると、
静電容量の高い陰極箔が得られるという効果を奏するも
のである。
また、本発明に係る方法は、アルミニウム鋳塊の大きさ
を問わずに使用できるため、比較的太きな鋳塊を使用し
た場合には、大量生産が可能になり、電解コンデンサ陰
極用アルミニウム箔の価格が低度になるという効果を奏
する。As explained above, the present invention is to manufacture an aluminum foil for an electrolytic capacitor cathode by a specific method using an aluminum ingot having a specific composition. Using the aluminum foil for an electrolytic capacitor cathode obtained in this way, the cathode is obtained by etching treatment.
This has the effect that a cathode foil with high capacitance can be obtained. In addition, the method according to the present invention can be used regardless of the size of the aluminum ingot, so if a relatively thick ingot is used, mass production is possible, and aluminum foil for electrolytic capacitor cathodes can be used. This has the effect of lowering the price of
Claims (3)
，熱間圧延工程，中間焼鈍工程及び冷間圧延工程に通し
てアルミニウム箔を得る方法において、前記アルミニウ
ム鋳塊としてＦｅ０．０１０〜０．０７０％，Ｓｉ０．
０１０〜０．１００％，Ａ１９９．７％以上の組成のも
のを用い、前記均質化処理工程及び中間焼鈍工程を省略
すると共に温度２５０℃以下で圧延を行うことを特徴と
する電解コンデンサ陰極用アルミニウム箔の製造方法。(1) In a method for obtaining aluminum foil by subjecting an aluminum ingot to a facing process, a homogenization process, a hot rolling process, an intermediate annealing process, and a cold rolling process, the aluminum ingot has Fe0.010 to 0. .070%, Si0.
Aluminum for an electrolytic capacitor cathode, characterized in that the aluminum has a composition of 010 to 0.100% and A199.7% or more, is omitted from the homogenization process and intermediate annealing process, and is rolled at a temperature of 250°C or less. Method of manufacturing foil.
，熱間圧延工程，中間焼鈍工程及び冷間圧延工程に通し
てアルミニウム箔を得る方法において、前記アルミニウ
ム鋳塊としてＦｅ０．０１０〜０．２００％，Ｓｉ０．
０１０〜０．２５０％，Ｃｕ０．２〜０．５％，Ａｌ９
９．０％以上の組成のものを用い、前記均質化処理工程
及び中間焼鈍工程を省略すると共に温度２５０℃以下で
圧延を行うことを特徴とする電解コンデンサ陰極用アル
ミニウム箔の製造方法。(2) In a method for obtaining aluminum foil by subjecting an aluminum ingot to a facing process, a homogenization process, a hot rolling process, an intermediate annealing process, and a cold rolling process, the aluminum ingot has Fe0.010 to 0. .200%, Si0.
010~0.250%, Cu0.2~0.5%, Al9
A method for manufacturing an aluminum foil for an electrolytic capacitor cathode, characterized in that aluminum foil having a composition of 9.0% or more is used, the homogenization process and intermediate annealing process are omitted, and rolling is performed at a temperature of 250°C or less.
，熱間圧延工程，中間焼鈍工程及び冷間圧延工程に通し
てアルミニウム箔を得る方法において、前記アルミニウ
ム鋳塊としてＦｅ０．０１０〜０．２００％，Ｓｉ０．
０１０〜０．２５０％，Ｃｕ０．２〜０．５％，Ａｌ９
９．０％以上の組成のものを用い、前記均質化処理工程
を省略すると共に温度２５０℃以下で熱間圧延を行い、
且つ前記中間焼鈍の条件を板厚６ｍｍ以下，温度２００
℃以上，時間５時間以上とすることを特徴とする電解コ
ンデンサ陰極用アルミニウム箔の製造方法。(3) In a method for obtaining aluminum foil by subjecting an aluminum ingot to a facing process, a homogenization process, a hot rolling process, an intermediate annealing process, and a cold rolling process, the aluminum ingot has Fe0.010 to 0. .200%, Si0.
010~0.250%, Cu0.2~0.5%, Al9
Using a material with a composition of 9.0% or more, omitting the homogenization process and hot rolling at a temperature of 250 ° C. or less,
In addition, the conditions for the intermediate annealing are as follows: board thickness 6 mm or less, temperature 200
A method for manufacturing an aluminum foil for an electrolytic capacitor cathode, characterized in that the temperature is 5 hours or more at a temperature of 5 hours or more.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP1393890A JP2907392B2 (en) | 1990-01-24 | 1990-01-24 | Manufacturing method of aluminum foil for cathode of electrolytic capacitor |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP1393890A JP2907392B2 (en) | 1990-01-24 | 1990-01-24 | Manufacturing method of aluminum foil for cathode of electrolytic capacitor |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH03291363A true JPH03291363A (en) | 1991-12-20 |
| JP2907392B2 JP2907392B2 (en) | 1999-06-21 |
Family
ID=11847145
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP1393890A Expired - Fee Related JP2907392B2 (en) | 1990-01-24 | 1990-01-24 | Manufacturing method of aluminum foil for cathode of electrolytic capacitor |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JP2907392B2 (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2013018164A1 (en) * | 2011-07-29 | 2013-02-07 | 古河スカイ株式会社 | Aluminum alloy foil for electrode collector and production method therefor |
| CN103748713A (en) * | 2011-07-29 | 2014-04-23 | 株式会社Uacj | Aluminum alloy foil for electrode collector and production method therefor |
| CN105908021A (en) * | 2016-05-18 | 2016-08-31 | 登电集团铝加工有限公司 | Pure aluminum cathode foil for capacitors and manufacturing method thereof |
-
1990
- 1990-01-24 JP JP1393890A patent/JP2907392B2/en not_active Expired - Fee Related
Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2013018164A1 (en) * | 2011-07-29 | 2013-02-07 | 古河スカイ株式会社 | Aluminum alloy foil for electrode collector and production method therefor |
| CN103748713A (en) * | 2011-07-29 | 2014-04-23 | 株式会社Uacj | Aluminum alloy foil for electrode collector and production method therefor |
| EP2738850A1 (en) * | 2011-07-29 | 2014-06-04 | UACJ Corporation | Aluminum alloy foil for electrode collector and production method therefor |
| EP2738850A4 (en) * | 2011-07-29 | 2014-09-03 | Uacj Corp | Aluminum alloy foil for electrode collector and production method therefor |
| JPWO2013018164A1 (en) * | 2011-07-29 | 2015-02-23 | 株式会社Uacj | Aluminum alloy foil for electrode current collector and method for producing the same |
| US9847530B2 (en) | 2011-07-29 | 2017-12-19 | Uacj Corporation | Aluminum alloy foil for electrode collector and production method therefor |
| US10916357B2 (en) | 2011-07-29 | 2021-02-09 | Uacj Corporation | Aluminum alloy foil for electrode collector and production method therefor |
| CN105908021A (en) * | 2016-05-18 | 2016-08-31 | 登电集团铝加工有限公司 | Pure aluminum cathode foil for capacitors and manufacturing method thereof |
Also Published As
| Publication number | Publication date |
|---|---|
| JP2907392B2 (en) | 1999-06-21 |
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