JPH0488155A - Manufacture of aluminum alloy foil for negative pole of electrolytic capacitor - Google Patents
Manufacture of aluminum alloy foil for negative pole of electrolytic capacitorInfo
- Publication number
- JPH0488155A JPH0488155A JP20176390A JP20176390A JPH0488155A JP H0488155 A JPH0488155 A JP H0488155A JP 20176390 A JP20176390 A JP 20176390A JP 20176390 A JP20176390 A JP 20176390A JP H0488155 A JPH0488155 A JP H0488155A
- Authority
- JP
- Japan
- Prior art keywords
- foil
- aluminum alloy
- negative pole
- electrolytic capacitor
- aluminum
- 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
- 239000011888 foil Substances 0.000 title claims abstract description 72
- 229910000838 Al alloy Inorganic materials 0.000 title claims abstract description 33
- 239000003990 capacitor Substances 0.000 title claims abstract description 16
- 238000004519 manufacturing process Methods 0.000 title claims abstract description 5
- 238000000137 annealing Methods 0.000 claims abstract description 27
- 229910052782 aluminium Inorganic materials 0.000 claims abstract description 24
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 claims abstract description 24
- 238000005097 cold rolling Methods 0.000 claims abstract description 10
- 229910052725 zinc Inorganic materials 0.000 claims abstract description 8
- 238000005096 rolling process Methods 0.000 claims description 8
- 239000000203 mixture Substances 0.000 claims description 6
- 239000010949 copper Substances 0.000 abstract description 15
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 abstract description 13
- 238000000866 electrolytic etching Methods 0.000 abstract description 11
- 239000011701 zinc Substances 0.000 abstract description 11
- 238000000034 method Methods 0.000 abstract description 10
- 229910052802 copper Inorganic materials 0.000 abstract description 9
- 239000011777 magnesium Substances 0.000 abstract description 8
- 238000005530 etching Methods 0.000 abstract description 7
- 229910052742 iron Inorganic materials 0.000 abstract description 7
- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 abstract description 6
- 229910052749 magnesium Inorganic materials 0.000 abstract description 4
- FYYHWMGAXLPEAU-UHFFFAOYSA-N Magnesium Chemical compound [Mg] FYYHWMGAXLPEAU-UHFFFAOYSA-N 0.000 abstract description 2
- HCHKCACWOHOZIP-UHFFFAOYSA-N Zinc Chemical compound [Zn] HCHKCACWOHOZIP-UHFFFAOYSA-N 0.000 abstract description 2
- 208000007542 Paresis Diseases 0.000 abstract 1
- 208000012318 pareses Diseases 0.000 abstract 1
- 230000002250 progressing effect Effects 0.000 abstract 1
- 230000001105 regulatory effect Effects 0.000 abstract 1
- 239000002344 surface layer Substances 0.000 description 7
- 230000007423 decrease Effects 0.000 description 5
- 239000002390 adhesive tape Substances 0.000 description 4
- 239000010410 layer Substances 0.000 description 4
- 239000000463 material Substances 0.000 description 4
- 229920000298 Cellophane Polymers 0.000 description 3
- MUBZPKHOEPUJKR-UHFFFAOYSA-N Oxalic acid Chemical compound OC(=O)C(O)=O MUBZPKHOEPUJKR-UHFFFAOYSA-N 0.000 description 3
- 230000000694 effects Effects 0.000 description 3
- VEXZGXHMUGYJMC-UHFFFAOYSA-N Hydrochloric acid Chemical compound Cl VEXZGXHMUGYJMC-UHFFFAOYSA-N 0.000 description 2
- 230000000052 comparative effect Effects 0.000 description 2
- 238000001816 cooling Methods 0.000 description 2
- 230000006866 deterioration Effects 0.000 description 2
- 238000010438 heat treatment Methods 0.000 description 2
- 238000000265 homogenisation Methods 0.000 description 2
- 238000005098 hot rolling Methods 0.000 description 2
- 239000011148 porous material Substances 0.000 description 2
- 239000007779 soft material Substances 0.000 description 2
- 239000000243 solution Substances 0.000 description 2
- 102000016942 Elastin Human genes 0.000 description 1
- 108010014258 Elastin Proteins 0.000 description 1
- 101100342332 Mus musculus Klf16 gene Proteins 0.000 description 1
- 239000010953 base metal Substances 0.000 description 1
- 238000005266 casting Methods 0.000 description 1
- 230000003247 decreasing effect Effects 0.000 description 1
- 229920002549 elastin Polymers 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 239000012535 impurity Substances 0.000 description 1
- 229910052751 metal Inorganic materials 0.000 description 1
- 239000002184 metal Substances 0.000 description 1
- 235000006408 oxalic acid Nutrition 0.000 description 1
- 239000002244 precipitate Substances 0.000 description 1
- 229920006395 saturated elastomer Polymers 0.000 description 1
- 238000002791 soaking Methods 0.000 description 1
- 239000006104 solid solution Substances 0.000 description 1
- 238000005482 strain hardening Methods 0.000 description 1
- 230000002195 synergetic effect Effects 0.000 description 1
- WYXIGTJNYDDFFH-UHFFFAOYSA-Q triazanium;borate Chemical compound [NH4+].[NH4+].[NH4+].[O-]B([O-])[O-] WYXIGTJNYDDFFH-UHFFFAOYSA-Q 0.000 description 1
- 238000004804 winding Methods 0.000 description 1
Landscapes
- Metal Rolling (AREA)
- ing And Chemical Polishing (AREA)
Abstract
Description
本発明は、高強度で且つ高静電容量の電解コンデンサ用
陰極箔を作成するのに適したアルミニウム合金箔の製造
方法に関するものである。The present invention relates to a method for producing an aluminum alloy foil suitable for producing a high-strength and high-capacitance cathode foil for electrolytic capacitors.
従来より、電解コンデンサ陰極用アルミニウム合金箔と
しては、アルミニウムに銅を添加したものが用いられて
いる。しかし、このアルミニウム合金箔を電解エツチン
グして陰極箔とすると、次のような欠点があった。即ち
、電解エツチングが層状に進行し、陰極箔としたときに
その表面層がくずれやすいということがあった。陰極箔
の表面層がくずれると、陰極箔の静電容量が低下すると
いう欠点を惹起する。また、陰極箔は陽極箔と重合させ
て巻回し、その端末を接着テープで止着し、コンデンサ
として電気機器等に組み込んで使用することが多い。こ
の際、陰極箔の表面層がくずれやすいと、表面層のくず
れに伴い、接着テープによる止着が解けるという欠点が
あった。
このように、従来のアルミニウムに銅を添加したアルミ
ニウム合金箔は、電解エツチング後の表面層のくずれに
起因する種々の欠点があった。
船釣に言えば、表面層のくずれは、アルミニウム合金箔
中の銅の添加量が多ければ多いほど、また鉄等の不純物
が多ければ多いほど、顕著であった。
この欠点を回避するため、従来より銅の添加量を０．３
％程度に抑えたアルミニウム箔を使用することが提案さ
れている。更に、中間焼鈍後の冷間圧延による圧下率を
少なくすることも提案されている。これは、冷間圧延を
繰り返して圧下率を大きくすると、金属組織が層状にな
りやすく、したがって層状にエツチングされるのを防止
するためである。しかし、アルミニウム純度を上げたり
、或いは中間焼鈍後の圧下率を少なくすると、得られる
アルミニウム合金箔の強度低下を招き、したがってこの
アルミニウム合金箔をエツチングして得られる陰極箔の
強度も低下するという欠点があった。陰極箔の強度が低
下すると、箔厚を薄（することが困難になり、結局電解
コンデンサの小型化が図れず、ひいては電気機器等の小
型化が図れないという新たな欠点を惹起するに至るので
ある。BACKGROUND ART Conventionally, as an aluminum alloy foil for an electrolytic capacitor cathode, aluminum with copper added has been used. However, when this aluminum alloy foil was electrolytically etched to produce a cathode foil, there were the following drawbacks. That is, the electrolytic etching progresses in a layered manner, and the surface layer tends to collapse when used as a cathode foil. When the surface layer of the cathode foil collapses, it causes a disadvantage that the capacitance of the cathode foil decreases. Further, the cathode foil is often polymerized with the anode foil, wound, and its ends are fixed with an adhesive tape, and the foil is incorporated into electrical equipment and the like as a capacitor. At this time, if the surface layer of the cathode foil is easily deformed, there is a drawback that the adhesion by the adhesive tape comes undone as the surface layer deforms. As described above, conventional aluminum alloy foils made by adding copper to aluminum have various drawbacks due to deterioration of the surface layer after electrolytic etching. In terms of boat fishing, the more the amount of copper added to the aluminum alloy foil, and the more impurities such as iron, the more noticeable the deterioration of the surface layer. In order to avoid this drawback, the amount of copper added has been reduced to 0.3
It has been proposed to use aluminum foil with a reduced amount of aluminum foil. Furthermore, it has also been proposed to reduce the rolling reduction by cold rolling after intermediate annealing. This is because when cold rolling is repeated to increase the rolling reduction ratio, the metal structure tends to become layered, and therefore, to prevent layered etching. However, increasing the aluminum purity or decreasing the rolling reduction after intermediate annealing leads to a decrease in the strength of the resulting aluminum alloy foil, which has the disadvantage that the strength of the cathode foil obtained by etching this aluminum alloy foil also decreases. was there. If the strength of the cathode foil decreases, it becomes difficult to make the foil thinner, which leads to new drawbacks such as the inability to miniaturize electrolytic capacitors and, in turn, the inability to miniaturize electrical equipment. be.
【発明が解決しようとする課題］
そこで、本発明は、銅及び鉄と共に亜鉛及び／又はマグ
ネシウムを添加したアルミニウム板を使用して、特定の
中間焼鈍条件で及び特定の圧下率で冷間圧延してアルミ
ニウム合金箔を得、これを電解コンデンサ陰極用アルミ
ニウム合金箔とすることにより、陰極箔を作成する際の
電解エツチング時において、層状にエツチングが進行し
ないようにして、陰極箔の表面層のくずれが生じにくい
ようにし、且つ陰極箔の強度を向上させようというもの
である。
【課題を解決するための手段及び作用】即ち、本発明は
、Ｃｕ ０．１〜１．０％、Ｆｅ０．０５〜０゜２０％
、Ｚｎ及び／又はＭｇ０．０１〜０．１５％、残部Ａｔ
の組成よりなるアルミニウム板を冷間圧延した後、３５
０〜５００°Ｃで中間焼鈍し、次いで圧下率９０％以上
となるようにして冷間圧延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合金箔の製造方法に関する
ものである。
本発明に使用するアルミニウム板の組成は、Ｃｕ０．１
〜１．０％、Ｆｅ０．０５〜０．２０％、Ｚｎ及び／又
はＭｇ０．０１〜０．１５％、残部Ａｌよりなるもので
ある。ここで、％は全て重量％を表している。
アルミニウム板中におけるＣｕは、Ａｌ中に固溶してエ
ツチング特性を向上させるものである。Ｃｕが０．１％
未満になると、得られるアルミニウム合金箔のエツチン
グ特性が向上しないため、好ましくない。また、Ｃｕが
１．０％を超えると、飽和状態になってＡｌ中に固溶し
なくなり、また得られるアルミニウム合金箔が層状にエ
ツチングされやすくなるため、好ましくない。
アルミニウム板中におけるＦｅは、得られるアルミニウ
ム合金箔中の再結晶粒を微細化させて、箔の強度を向上
させるものである。Ｆｅが０．０５％未満になると、箔
の強度が向上しないため、好ましくない。また、Ｆｅが
０．２０％を超えると、アルミニウム合金箔が層状にエ
ラチンごされやすくなるため、好ましくない。
アルミニウム板中におけるＺｎ又はＭｇは、得られるア
ルミニウム合金箔を電解エツチングする際、層状にエツ
チングされるのを防止して、海綿状にエツチングされる
ようにするものである。Ｚｎ及び／又はＭｇが０．０１
％未満であると、層状にエツチングが進行するのを防止
しにくくなり、好ましくない。また、Ｚｎ及び／又はＭ
ｇが０．１５％を超えると、電解エツチング時に粗大孔
が生じやすくなって静電容量の低下を招き、好ましくな
い。Ｚｎ及びＭｇは、それを単独で０．０１〜０．１５
％使用してもよいし、また各々を０．０１〜０．１５％
の範囲内で混合して使用してもよい。混合して使用した
場合には、単独使用の場合に比べて、相乗効果により電
解エツチング特性が更に向上する。
以上の如き組成を持つアルミニウム板は、鋳造時にＣｕ
＋ Ｆｅ、 Ｚｎ＋ Ｍｇを所望量添加して鋳造して鋳
塊を得、その後均質化処理および熱間圧延して得ること
ができる。
このアルミニウム板を従来公知の方法によって、所望の
厚さになるまで冷間圧延する。そして、所望厚のアルミ
ニウム板に中間焼鈍を施す。中間焼鈍は、３５０〜５０
０°Ｃの温度で行われる。中間焼鈍を３５０°Ｃ未満で
行うと、ＣｕがＡｌ中に十分固溶せずに析出し、電解エ
ツチング時に粗大孔を形成しやすくなり、好ましくない
。また、中間焼鈍を５００℃を超える温度で行うと、再
結晶粒が粗大化し、得られるアルミニウム合金箔の強度
を低下させるので、好ましくない。
なお、中間焼鈍の方法としては、バッチ焼鈍のみならず
連続焼鈍であってもよい。強度の点からは、−船釣には
連続焼鈍の方が高い値を得ることができるが、Ｃｕ量が
多くなるとハツチ焼鈍の方が高い値を得られる場合もあ
る。
中間焼鈍後のアルミニウム板には更に冷間圧延が施され
、アルミニウム合金箔が得られる。この冷間圧延におい
て、圧下率が９０％以上となるようにする必要がある。
ここで、圧下率とは、（（１゜−ｔｌ ）／ｌｏ 〕Ｘ
１００ （％）で表されるものである。但し、ｔｏは
中間焼鈍後のアルミニウム板の厚さを表し、ｔｌは得ら
れたアルミニウム合金箔の厚さを表すものである。圧下
率を９０％未満にすると、十分な加工硬化が発現せず、
得られるアルミニウム合金箔の強度が十分向上しにくい
ので、好ましくない。また、最終焼鈍を施す場合に、圧
下率を９０％未満にしておくと、アルミニウム合金箔中
の再結晶粒の微細化が不十分となって、アルミニウム合
金箔の強度が向上しにくいので、好ましくない。
以上のようにして得られたアルミニウム合金箔は、電解
コンデンサ陰極用として好適に使用しうるものである。
即ち、このアルミニウム合金箔に電解エツチングを施し
て、箔表面に微細孔を形成させ、静電容量を高めて電解
コンデンサ用陰極箔とするのである。[Problems to be Solved by the Invention] Therefore, the present invention uses an aluminum plate to which zinc and/or magnesium is added together with copper and iron, and cold-rolls it under specific intermediate annealing conditions and at a specific reduction rate. By using this aluminum alloy foil as an aluminum alloy foil for an electrolytic capacitor cathode, it is possible to prevent etching from proceeding in layers during electrolytic etching when creating a cathode foil, and to prevent deformation of the surface layer of the cathode foil. The purpose is to make it less likely to occur and to improve the strength of the cathode foil. [Means and effects for solving the problems] That is, the present invention provides Cu 0.1 to 1.0%, Fe 0.05 to 0.20%
, Zn and/or Mg0.01-0.15%, balance At
After cold rolling an aluminum plate having a composition of 35
The present invention relates to a method for manufacturing an aluminum alloy foil for an electrolytic capacitor cathode, which comprises intermediate annealing at 0 to 500°C and then cold rolling to a rolling reduction of 90% or more. The composition of the aluminum plate used in the present invention is Cu0.1
~1.0%, Fe0.05~0.20%, Zn and/or Mg0.01~0.15%, and the remainder Al. Here, all % represents weight %. Cu in the aluminum plate is dissolved in Al to improve etching characteristics. Cu is 0.1%
If it is less than this, the etching properties of the resulting aluminum alloy foil will not improve, which is not preferable. Further, if Cu exceeds 1.0%, it becomes saturated and does not form a solid solution in Al, and the resulting aluminum alloy foil is likely to be etched in layers, which is not preferable. Fe in the aluminum plate refines the recrystallized grains in the obtained aluminum alloy foil and improves the strength of the foil. If Fe is less than 0.05%, the strength of the foil will not improve, which is not preferable. Moreover, if Fe exceeds 0.20%, the aluminum alloy foil is likely to be layered with elastin, which is not preferable. Zn or Mg in the aluminum plate prevents the resulting aluminum alloy foil from being etched into a layered shape and is etched into a spongy shape when the resulting aluminum alloy foil is electrolytically etched. Zn and/or Mg is 0.01
If it is less than %, it becomes difficult to prevent etching from proceeding in layers, which is not preferable. Also, Zn and/or M
If g exceeds 0.15%, coarse pores are likely to be formed during electrolytic etching, leading to a decrease in capacitance, which is not preferable. Zn and Mg alone are 0.01 to 0.15
% or 0.01 to 0.15% of each
You may mix and use it within the range of. When used in combination, the electrolytic etching properties are further improved due to a synergistic effect compared to when used alone. Aluminum plates with the above composition are made of Cu at the time of casting.
+ Fe, Zn + Mg can be added in desired amounts and cast to obtain an ingot, followed by homogenization treatment and hot rolling. This aluminum plate is cold rolled by a conventionally known method until it reaches a desired thickness. Then, intermediate annealing is performed on the aluminum plate having a desired thickness. Intermediate annealing is 350-50
It is carried out at a temperature of 0°C. If the intermediate annealing is performed at a temperature lower than 350°C, Cu is not sufficiently dissolved in Al and precipitates, and coarse pores are likely to be formed during electrolytic etching, which is not preferable. Moreover, if intermediate annealing is performed at a temperature exceeding 500° C., the recrystallized grains become coarse and the strength of the obtained aluminum alloy foil is reduced, which is not preferable. Note that the intermediate annealing method may be not only batch annealing but also continuous annealing. In terms of strength, continuous annealing can provide a higher value for boat fishing, but if the amount of Cu increases, hatch annealing may provide a higher value. The aluminum plate after intermediate annealing is further cold rolled to obtain an aluminum alloy foil. In this cold rolling, it is necessary to make the rolling reduction ratio 90% or more. Here, the rolling reduction rate is ((1°-tl)/lo)X
It is expressed in 100 (%). However, to represents the thickness of the aluminum plate after intermediate annealing, and tl represents the thickness of the obtained aluminum alloy foil. If the reduction rate is less than 90%, sufficient work hardening will not occur,
This is not preferred because it is difficult to sufficiently improve the strength of the resulting aluminum alloy foil. In addition, when final annealing is performed, if the rolling reduction is less than 90%, the recrystallized grains in the aluminum alloy foil will not be sufficiently refined, making it difficult to improve the strength of the aluminum alloy foil, so it is preferable. do not have. The aluminum alloy foil obtained as described above can be suitably used as an electrolytic capacitor cathode. That is, this aluminum alloy foil is subjected to electrolytic etching to form micropores on the surface of the foil to increase its capacitance and to be used as a cathode foil for electrolytic capacitors.
純度９９．９％のアルミニウム地金に、Ｃｕ、 Ｆｅ、
Ｚｎ。
Ｍｇを第１表に示す割合で添加して、所定の大きさのイ
ンゴットを鋳造した。このインゴットを、温度６００°
Ｃで１０時間の条件下でソーキング（均質化処理）を行
い、その後熱間圧延して３閣厚のアルミニウム板を得た
。このアルミニウム板を所望の厚さになるまで冷間圧延
し、第２表に示した条件で中間焼鈍を行った。また、中
間焼鈍後に、第２表に示した条件の圧下率で冷間圧延し
、最終的に０．０６ａｍ厚のアルミニウム合金箔（硬質
材）を得た。
得られたアルミニウム合金箔（硬質材）に、次の条件で
電解エツチングを施して陰極箔を得た。
即ち、６０゛Ｃに保持した２、５％塩酸＋１．３％蓚酸
の溶液中で、４０Ａ／ｄｒｒｆの直流電流を用いて、８
０秒間電解エツチングを行った。このようにして得られ
た陰極箔の静電容量を、８％硼酸アンモニウム液中にて
ＬＣＲメーターを用いて測定し、その結果を第２表に示
した。なお、静電容量の単位はμＦ／Ｃｌ１１である。
また、陰極箔のエツチング面の剥離性を判断するために
、エツチング面にセロテープを貼着し、その後このセロ
テープを引き剥がす時に、エツチング面がセロテープと
共に引き剥がされるが否がをテストした（表面剥離テス
ト）。この結果、エツチング面が引き剥がされない場合
をＯとし、微小に引き剥がされる場合を△とし、多量に
引き剥がされる場合を×とし、第２表に示した。
また、上記の陰極箔の引張強さを測定し、その結果を第
２表に示した。更に、前記の硬質材に最終焼鈍を施して
軟質材とし、この軟質材を用いて陰極箔を作成し、この
引張強さも測定し、その結果を第２表に示した。なお、
引張強さの単位は、ｋｇｆ／−である。
注）１）第２表中の条件Ａは、ハツチ焼鈍をであること
を表す。バッチ焼鈍の条件は、加熱速度５０°Ｃ／ｈｒ
、保持時間５時間、冷却速度５０°Ｃ／ｈｒである。ま
た、条件Ｂは連続焼鈍であることを表す。連続焼鈍の条
件は、急速加熱で保持時間１分であり、急速冷却である
。
以上の結果から明らかなように、実施例に係る方法で得
られた陰極箔は、比較例のものに比べて静電容量が高く
、またエツチング面の剥離も少なく、更に引張強度も優
れている。即ち、実施例に係る方法で得られた陰極箔は
、比較例のものに比べて、前記三つの特性がバランスよ
く向上しているのである。99.9% pure aluminum base metal, Cu, Fe,
Zn. Mg was added in the proportions shown in Table 1, and an ingot of a predetermined size was cast. This ingot was heated to 600°
Soaking (homogenization treatment) was performed at C for 10 hours, followed by hot rolling to obtain an aluminum plate with a thickness of 3 mm. This aluminum plate was cold rolled to a desired thickness, and intermediate annealing was performed under the conditions shown in Table 2. After intermediate annealing, the aluminum alloy foil (hard material) was cold-rolled under the conditions shown in Table 2 to finally obtain an aluminum alloy foil (hard material) with a thickness of 0.06 am. The obtained aluminum alloy foil (hard material) was subjected to electrolytic etching under the following conditions to obtain a cathode foil. That is, in a solution of 2.5% hydrochloric acid + 1.3% oxalic acid maintained at 60°C, using a direct current of 40 A/drrf,
Electrolytic etching was performed for 0 seconds. The capacitance of the cathode foil thus obtained was measured using an LCR meter in an 8% ammonium borate solution, and the results are shown in Table 2. Note that the unit of capacitance is μF/Cl11. In addition, in order to judge the releasability of the etched surface of the cathode foil, we attached cellophane tape to the etched surface, and then tested whether or not the etched surface was peeled off together with the cellophane tape when the cellophane tape was peeled off (surface peeling). test). The results are shown in Table 2, where the etched surface is not peeled off as O, when it is slightly peeled off, it is Δ, and when it is peeled off a lot, it is x. Further, the tensile strength of the above cathode foil was measured, and the results are shown in Table 2. Further, the above-mentioned hard material was subjected to final annealing to make it a soft material, and a cathode foil was made using this soft material, and its tensile strength was also measured, and the results are shown in Table 2. In addition,
The unit of tensile strength is kgf/-. Note) 1) Condition A in Table 2 indicates hatch annealing. The conditions for batch annealing are a heating rate of 50°C/hr.
, a holding time of 5 hours, and a cooling rate of 50°C/hr. Moreover, condition B represents continuous annealing. The conditions for continuous annealing are rapid heating, holding time of 1 minute, and rapid cooling. As is clear from the above results, the cathode foil obtained by the method according to the example has higher capacitance than that of the comparative example, less peeling of the etched surface, and superior tensile strength. . That is, the cathode foil obtained by the method according to the example has improved balance in the above three properties compared to that of the comparative example.
以上説明したように、本発明に係る方法で得られた電解
コンデンサ陰極用アルミニウム合金箔は、ある特定の組
成を持ち、且つある特定の条件で製造されたものである
ため、電解エツチング時において層状にエツチングされ
ずに海綿状にエツチングされる。従って、得られた陰極
箔はその表面がくずれに（く、高静電容量である。更に
、電気機器等に陰極箔を巻回し端末を粘着テープで止着
して組み込んだ場合、表面くずれに起因して粘着テープ
が剥がれ、陰極箔の巻回が解けることが防止しうる。ま
た、本発明に係る方法は、中間焼鈍後の冷間圧延による
圧下率を高くすることができるので、得られるアルミニ
ウム合金箔の強度が高く、よって得られる陰極箔の強度
も高くなる。従って、陰極箔の厚さを薄くすることがで
き、得られる電解コンデンサを小型化することができ、
小型の電気機器に組み込むことが可能になる。
以上のように、本発明に係る方法で得られた電解コンデ
ンサ陰極用アルミニウム合金箔を使用して、陰極箔を作
成すると、高静電容量で且つ強度に優れ、更にこの陰極
箔を巻回して使用した場合にも巻回が解けにくいという
効果を奏するものである。As explained above, the aluminum alloy foil for an electrolytic capacitor cathode obtained by the method according to the present invention has a certain composition and is manufactured under certain conditions, so it does not form a layer during electrolytic etching. It is etched in a spongy manner instead of being etched in a straight line. Therefore, the obtained cathode foil has a high capacitance and its surface does not easily collapse.Furthermore, when the cathode foil is wrapped around an electrical device and installed with the ends fixed with adhesive tape, the surface is not susceptible to collapse. It is possible to prevent the adhesive tape from peeling off and the cathode foil from unwinding due to this.Furthermore, the method according to the present invention can increase the reduction rate by cold rolling after intermediate annealing. The strength of the aluminum alloy foil is high, and therefore the strength of the resulting cathode foil is also high.Therefore, the thickness of the cathode foil can be reduced, and the resulting electrolytic capacitor can be made smaller.
It becomes possible to incorporate it into small electrical equipment. As described above, when a cathode foil is made using the aluminum alloy foil for an electrolytic capacitor cathode obtained by the method according to the present invention, it has high capacitance and excellent strength. This has the effect that the winding is difficult to unravel even when used.
Claims (1)
Ｚｎ及び／又はＭｇ０．０１〜０．１５％、残部Ａｌの
組成よりなるアルミニウム板を冷間圧延した後、３５０
〜５００℃で中間焼鈍し、次いで圧下率９０％以上とな
るようにして冷間圧延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合金箔の製造方法。Cu0.1-1.0%, Fe0.05-0.20%,
After cold rolling an aluminum plate with a composition of 0.01 to 0.15% Zn and/or Mg and the balance Al, 350%
A method for producing an aluminum alloy foil for an electrolytic capacitor cathode, which comprises intermediate annealing at ~500°C and then cold rolling to a rolling reduction of 90% or more.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP20176390A JP3180956B2 (en) | 1990-07-30 | 1990-07-30 | Method for producing aluminum alloy foil for cathode of electrolytic capacitor |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP20176390A JP3180956B2 (en) | 1990-07-30 | 1990-07-30 | Method for producing aluminum alloy foil for cathode of electrolytic capacitor |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH0488155A true JPH0488155A (en) | 1992-03-23 |
| JP3180956B2 JP3180956B2 (en) | 2001-07-03 |
Family
ID=16446531
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP20176390A Expired - Fee Related JP3180956B2 (en) | 1990-07-30 | 1990-07-30 | Method for producing aluminum alloy foil for cathode of electrolytic capacitor |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JP3180956B2 (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2003089837A (en) * | 2001-09-17 | 2003-03-28 | Toyo Aluminium Kk | Aluminum alloy soft foil for cathode of electrolytic capacitor, and production method therefor |
| KR100403245B1 (en) * | 1996-12-25 | 2004-02-14 | 니폰 케미콘 가부시키가이샤 | Aluminum electrode foil for electrolytic capacitor and electrolytic capacitor using this foil |
-
1990
- 1990-07-30 JP JP20176390A patent/JP3180956B2/en not_active Expired - Fee Related
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| KR100403245B1 (en) * | 1996-12-25 | 2004-02-14 | 니폰 케미콘 가부시키가이샤 | Aluminum electrode foil for electrolytic capacitor and electrolytic capacitor using this foil |
| JP2003089837A (en) * | 2001-09-17 | 2003-03-28 | Toyo Aluminium Kk | Aluminum alloy soft foil for cathode of electrolytic capacitor, and production method therefor |
Also Published As
| Publication number | Publication date |
|---|---|
| JP3180956B2 (en) | 2001-07-03 |
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