JPH0339437A - Aluminum alloy foil for cathode chemical condenser - Google Patents
Aluminum alloy foil for cathode chemical condenserInfo
- Publication number
- JPH0339437A JPH0339437A JP17624889A JP17624889A JPH0339437A JP H0339437 A JPH0339437 A JP H0339437A JP 17624889 A JP17624889 A JP 17624889A JP 17624889 A JP17624889 A JP 17624889A JP H0339437 A JPH0339437 A JP H0339437A
- Authority
- JP
- Japan
- Prior art keywords
- alloy foil
- intermetallic compounds
- intermetallic compound
- aluminum alloy
- foil
- 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.)
- Pending
Links
- 239000011888 foil Substances 0.000 title claims abstract description 33
- 229910000838 Al alloy Inorganic materials 0.000 title claims abstract description 13
- 239000000126 substance Substances 0.000 title abstract description 3
- 229910000765 intermetallic Inorganic materials 0.000 claims abstract description 32
- 239000012535 impurity Substances 0.000 claims abstract description 7
- 229910018084 Al-Fe Inorganic materials 0.000 claims abstract 5
- 229910018192 Al—Fe Inorganic materials 0.000 claims abstract 5
- 229910052782 aluminium Inorganic materials 0.000 claims description 13
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 claims description 13
- 239000003990 capacitor Substances 0.000 claims description 6
- 238000005530 etching Methods 0.000 abstract description 7
- 229910052751 metal Inorganic materials 0.000 abstract description 6
- 239000002184 metal Substances 0.000 abstract description 6
- 238000004519 manufacturing process Methods 0.000 abstract description 2
- 230000001105 regulatory effect Effects 0.000 abstract 1
- 238000004090 dissolution Methods 0.000 description 4
- 238000000034 method Methods 0.000 description 4
- 239000011856 silicon-based particle Substances 0.000 description 3
- 150000001875 compounds Chemical class 0.000 description 2
- 239000002245 particle Substances 0.000 description 2
- 238000005096 rolling process Methods 0.000 description 2
- 229910045601 alloy Inorganic materials 0.000 description 1
- 239000000956 alloy Substances 0.000 description 1
- 238000000137 annealing Methods 0.000 description 1
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 description 1
- 238000005097 cold rolling Methods 0.000 description 1
- 229910052802 copper Inorganic materials 0.000 description 1
- 230000002542 deteriorative effect Effects 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000002474 experimental method Methods 0.000 description 1
- 239000007789 gas Substances 0.000 description 1
- 238000005098 hot rolling Methods 0.000 description 1
- 239000007788 liquid Substances 0.000 description 1
- 238000002844 melting Methods 0.000 description 1
- 230000008018 melting Effects 0.000 description 1
- 150000002739 metals Chemical class 0.000 description 1
- 239000000203 mixture Substances 0.000 description 1
- -1 n5Mg Substances 0.000 description 1
- 229910052760 oxygen Inorganic materials 0.000 description 1
- 239000001301 oxygen Substances 0.000 description 1
- 239000002244 precipitate Substances 0.000 description 1
- 239000000047 product Substances 0.000 description 1
- 239000006104 solid solution Substances 0.000 description 1
- 229910052725 zinc Inorganic materials 0.000 description 1
Landscapes
- ing And Chemical Polishing (AREA)
Abstract
Description
【発明の詳細な説明】
産業上の利用分野
この発明は電解コンデンサ陰極用アルミニウム合金箔に
関する。DETAILED DESCRIPTION OF THE INVENTION Field of Industrial Application This invention relates to an aluminum alloy foil for an electrolytic capacitor cathode.
従来の技術
アルミニウム電解コンデンサの静電容量を増大してその
性能を向上させるためには、陽極用アルミニウム箔のみ
ならず陰極用箔の静電容量も増大させることが必要であ
る。このためには陰極用箔に電気化学的あるいは化学的
エツチング処理を施して表面を粗面化し、表面積を増大
することが有効であり、一般に行われてもいる。Prior Art In order to increase the capacitance of an aluminum electrolytic capacitor and improve its performance, it is necessary to increase the capacitance not only of the anode aluminum foil but also of the cathode foil. For this purpose, it is effective and commonly practiced to roughen the surface by electrochemically or chemically etching the cathode foil to increase its surface area.
発明が解決しようとする課題
ところで、陰極箔には誘電体皮膜が形成されないため、
陽極箔に要求される漏洩電流や耐電圧は必要とされない
。このため陰極用アルミニウム箔は陽極用箔に較べて通
常肉薄に設計される。従って、機械的強度を保持しつつ
拡面率の向上を図るためには、エツチングの際に箔の全
表面が均一適度に溶解されることが求められる。Problems to be Solved by the Invention By the way, since a dielectric film is not formed on the cathode foil,
Leakage current and withstand voltage required for anode foil are not required. For this reason, the aluminum foil for the cathode is usually designed to be thinner than the foil for the anode. Therefore, in order to improve the area enlargement ratio while maintaining mechanical strength, it is required that the entire surface of the foil be uniformly and appropriately dissolved during etching.
しかるに、従来の陰極用アルミニウム箔は概して溶解性
が不均一であり、過度に溶解して部分的な強度低下を生
じたり、逆に溶解されにくい部分が存在して拡面率の十
分な増大を図れないというような欠点があった。However, conventional aluminum foils for cathodes generally have non-uniform solubility, and may dissolve excessively, resulting in a partial decrease in strength, or conversely, have portions that are difficult to dissolve, making it difficult to sufficiently increase the area ratio. There were drawbacks such as the inability to plan.
この発明は、かかる技術的背景に鑑みてなされたもので
あって、溶解性を改善しエツチング時に表面の均一適度
な溶解を可能とする電解コンデンサ陰極用アルミニウム
合金箔の提供を目的とするものである。The present invention was made in view of the above technical background, and aims to provide an aluminum alloy foil for an electrolytic capacitor cathode that improves solubility and enables uniform and appropriate dissolution of the surface during etching. be.
課題を解決するための手段
上気目的を達成するために、発明者は溶解性を改善する
にはアルミニウム中に電位差の異なる物質を均一に分散
させるのが良いとの考えを基本に種々実験と研究を重ね
た結果、Ａｆｌ−Ｆｅ系金属間化合物を利用するのが最
も良いことを見出し、かかる知見に基いてこの発明を完
成しえたものである。Means for Solving the Problem In order to achieve the objective, the inventor conducted various experiments based on the idea that to improve solubility, it is better to uniformly disperse substances with different potential differences in aluminum. As a result of repeated research, it was discovered that it is best to use Afl-Fe intermetallic compounds, and this invention was completed based on this knowledge.
即ち、前記課題は、Ａ、Ｑ−Ｆ ｅ基金属間化合物を、
Ｆｅ量で０． ０２〜０． １５ｗｔ％の範囲に含有し
、あるいはさらにＳｉ：０．２ｗｔ％以下、Ｃｕ：１．
０ｗｔ％以下を含有し、残部アルミニウム及び前記金属
間化合物として存在するＦｅ以外のＦｅを含む不可避不
純物からなることを特徴とする電解コンデンサ陰極用ア
ルミニウム合金箔によって達成される。That is, the above problem is to solve the problem of A, Q-Fe group intermetallic compound,
Fe amount is 0. 02~0. Si: 0.2 wt% or less, Cu: 1.
This is achieved by an aluminum alloy foil for an electrolytic capacitor cathode, which is characterized by containing 0 wt% or less, and the balance being aluminum and unavoidable impurities including Fe other than Fe present as the intermetallic compound.
まず、この発明では合金箔中にＡ、Ｑ−Ｆ ｅ基金属間
化合物を存在させなければならない。Ａ１１−Ｆｅ系金
属間化合物を存在させることによって、該金属間化合物
がエツチング時の核となり、均一な溶解が促進されるか
らである。発明者は本発明の成立過程において、Ａｕ−
Ｆｅ系金属間化合物の他にＳｉ粒子やＡｆ１２０３粒子
を存在させた場合の溶解性を試験したが、Ｓｉ粒子では
溶解性が不均一となり、またＡく２０３粒子では溶解性
がさほど改善されず、いずれもＡｆｌ−Ｆｅ系金属間化
合物はどの溶解性を実現できなかった。かかるＡ［−Ｆ
ｅ系金属間化合物の量は、該化合物として存在するＦｅ
Ｑが０．０２〜０．１５ｗｔ％であるような範囲に規定
されなければならない。この範囲に規定することによっ
てＡｎ−Ｆｅ系金属間化合物を均一に存在させることが
でき好ましい溶解状態が実現される。即ち、Ｆｅ量が０
．０２ｗｔ％未満の金属間化合物の量では溶解性が不十
分であり、Ｆｅ量が０．１５ｗｔ％を超える金属間化合
物量では溶解過多となり、箔の強度低下等を派生する。First, in this invention, an A, Q-Fe based intermetallic compound must be present in the alloy foil. This is because the presence of the A11-Fe-based intermetallic compound serves as a nucleus during etching and promotes uniform dissolution. In the process of establishing the present invention, the inventor
We tested the solubility when Si particles and Af1203 particles were present in addition to the Fe-based intermetallic compound, but the solubility was uneven with Si particles, and the solubility was not improved much with A203 particles. None of the Afl-Fe based intermetallic compounds could achieve any solubility. Such A[-F
The amount of the e-based intermetallic compound is determined by the amount of Fe present as the compound.
Q must be defined in a range of 0.02 to 0.15 wt%. By specifying this range, the An-Fe based intermetallic compound can be made to exist uniformly and a preferable dissolved state can be realized. That is, the amount of Fe is 0
．． If the amount of the intermetallic compound is less than 0.02 wt%, the solubility is insufficient, and if the amount of the intermetallic compound exceeds 0.15 wt%, there will be excessive dissolution, resulting in a decrease in the strength of the foil.
好ましくはＡ（１−Ｆ ｅ基金属間化合物の含有量はＦ
ｅ量で０．０３〜０．ｌｗｔ％とするのが良い。また、
より均一でかつ適度な溶解状態を実現するためには、Ａ
ｎ−Ｆｅ系金属間化合物の大きさは１０μｍ以下とする
のが良く、また１μｍ以下の大きさのものが全体の７０
％以上を占めて存在しているのが好ましい。なお、金属
間化合物として存在するＦｅ以外のＦｅは固溶限度まで
不可避不純物としてその含有が許容される。Preferably A (the content of the 1-Fe group intermetallic compound is F
The amount of e is 0.03 to 0. It is preferable to set it to lwt%. Also,
In order to achieve a more uniform and appropriate dissolution state, A
The size of the n-Fe-based intermetallic compound is preferably 10 μm or less, and the size of 1 μm or less accounts for 70% of the total.
It is preferable that it is present in an amount of % or more. Note that Fe other than Fe present as an intermetallic compound is allowed to be included as an unavoidable impurity up to the solid solution limit.
任意元素として添加が許容されるＳ ｉ ｓ Ｃｕは、
ともに溶解性の改善に寄与するものである。S i s Cu, which is allowed to be added as an optional element, is
Both contribute to improving solubility.
しかし、Ｓｉが０． ２ｗｔ％を超えると、箔の製造途
中にＳｉ粒子が生成され易くなり、溶解性を悪化させる
。一方、Ｃｕが１．０ｗｔ％を超えるとエツチング後Ｃ
ｕが表面に析出し、箔が腐食し易くなる。なお、他のＭ
ｎ５Ｍｇ、Ｃｒ、Ｚｎ％Ｔｉ等の不純物はＯ，ｌｗｔ％
程度まで含有が許容される。However, Si is 0. If it exceeds 2 wt%, Si particles are likely to be generated during the production of the foil, resulting in poor solubility. On the other hand, if Cu exceeds 1.0wt%, C
U precipitates on the surface, making the foil more likely to corrode. In addition, other M
Impurities such as n5Mg, Cr, Zn%Ti are O, lwt%
Containment is permitted up to a certain extent.
上記の陰極用アルミニウム箔の製造は特に限定されるも
のではないが、−例を挙げると次のとおりである。即ち
、予めＡＡ−Ｆｅ系金属間化合物とアルミニウム溶湯を
準備しておき、金属間化合物を溶湯中に添加し化合物が
溶融しない間に凝固させ、以後熱間圧延、冷間圧延、箔
圧延（または最終焼鈍）する方法とか、あるいは金属間
化合物を添加した溶湯から直接に板及び箔を造り、圧延
で最終厚さに調整する方法などを挙げうる。The method of producing the above aluminum foil for cathode is not particularly limited, but an example is as follows. That is, an AA-Fe intermetallic compound and molten aluminum are prepared in advance, the intermetallic compound is added to the molten metal and solidified while the compound is not melted, and then hot rolling, cold rolling, foil rolling (or Examples include a method in which sheets and foils are made directly from a molten metal with an intermetallic compound added (final annealing), and a method in which the final thickness is adjusted by rolling.
発明の効果
この発明に係る陰極用アルミニウム合金箔は、上述の次
第で、所定量のＡ、Ｑ−Ｆｅ系金属間化合物を含有する
ものであるから、エツチング時にアルミニウム箔の表面
を均一適度に溶解させることができ、過度の溶解による
強度低下等を派生することなく拡面率の向上を図ること
ができ、ひいては静電容量の増大が可能となる。Effects of the Invention As described above, the aluminum alloy foil for a cathode according to the present invention contains a predetermined amount of A, Q-Fe based intermetallic compound, so that the surface of the aluminum foil can be uniformly and appropriately dissolved during etching. Therefore, it is possible to improve the area expansion ratio without deteriorating the strength due to excessive melting, and as a result, it is possible to increase the capacitance.
実施例 次に、この発明の詳細な説明する。Example Next, the present invention will be explained in detail.
Ａｆｌ −Ｆ ｅ金属間化合物を酸素雰囲気中で加熱し
酸化させたのち小さく分断し、添加量を各種に変えて各
種アルミニウム溶湯中に添加した。The Afl-Fe intermetallic compound was heated and oxidized in an oxygen atmosphere, then cut into small pieces, and added to various aluminum molten metals in various amounts.
溶湯中のＡ、Ｑ−Ｆ ｅ金属間化合物及び各元素の含有
量は第１表のとおりであった。そして、Ａ（１−Ｆｅ金
属間化合物の添加後直ちに撹拌し均一分散させて鋳造し
、厚さ５ｆｆｉＩｍの鋳塊を製作した。次に、該鋳塊に
冷間圧延、箔圧延を施して厚さ５０μｍの箔としたのち
、４００℃×１分間の焼鈍を行った。The contents of A, Q-Fe intermetallic compounds and each element in the molten metal were as shown in Table 1. Immediately after adding A (1-Fe intermetallic compound), the mixture was stirred to uniformly disperse it and cast to produce an ingot with a thickness of 5ffiIm.Next, the ingot was cold rolled and foil rolled to give a thick After forming a foil with a thickness of 50 μm, it was annealed at 400° C. for 1 minute.
上記により得た各種陰極用アルミニウム箔につき、その
後３５％ＨＣ，ｉ２液浴中（浴温７０℃）に２分間浸漬
してエツチングを行い、ガスの発生状態を調べるととも
に、重量の減少割合、表面のエツチング形態を調べて溶
解性の良否を総合的に判断した。その結果を第１表に併
せて示す。The various aluminum foils for cathodes obtained above were then etched by immersing them in a 35% HC, i2 liquid bath (bath temperature 70°C) for 2 minutes, and the gas generation state was investigated. The etching form was examined to comprehensively judge the solubility. The results are also shown in Table 1.
上記第１表の結果かられかるように、本発明実施品は溶
解性に優れていることを確認しえた。As can be seen from the results in Table 1 above, it was confirmed that the products of the present invention had excellent solubility.
以 上Below Up
Claims (2)
〜０．１５ｗｔ％の範囲に含有し、残部アルミニウム及
び前記金属間化合物として存在するＦｅ以外のＦｅを含
む不可避不純物からな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。(1) Al-Fe based intermetallic compound with Fe amount of 0.02
An aluminum alloy foil for an electrolytic capacitor cathode, characterized in that the aluminum alloy foil contains unavoidable impurities in a range of 0.15 wt%, the balance being aluminum and Fe other than Fe present as the intermetallic compound.
〜０．１５ｗｔ％の範囲に含有し、さらにＳｉ：０．２
ｗｔ％以下、Ｃｕ：１．０ｗｔ％以下を含有し、残部ア
ルミニウム及び前記金属間化合物として存在するＦｅ以
外のＦｅを含む不可避不純物からな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。(2) Al-Fe based intermetallic compound with Fe amount of 0.02
Contained in the range of ~0.15 wt%, and further Si: 0.2
An aluminum alloy foil for an electrolytic capacitor cathode, characterized in that the aluminum alloy foil contains 1.0 wt% or less of Cu, and the remainder is aluminum and unavoidable impurities including Fe other than Fe present as the intermetallic compound.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP17624889A JPH0339437A (en) | 1989-07-07 | 1989-07-07 | Aluminum alloy foil for cathode chemical condenser |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP17624889A JPH0339437A (en) | 1989-07-07 | 1989-07-07 | Aluminum alloy foil for cathode chemical condenser |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPH0339437A true JPH0339437A (en) | 1991-02-20 |
Family
ID=16010242
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP17624889A Pending JPH0339437A (en) | 1989-07-07 | 1989-07-07 | Aluminum alloy foil for cathode chemical condenser |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH0339437A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2010253233A (en) * | 2009-04-03 | 2010-11-11 | Taichi Hanmyo | Dressing table |
Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS63106A (en) * | 1987-05-15 | 1988-01-05 | 昭和アルミニウム株式会社 | Aluminum alloy foil for cathode of electrolytic capacitor |
| JPS63290238A (en) * | 1987-05-22 | 1988-11-28 | Toyo Alum Kk | Aluminum alloy foil for cathode of electrolytic condenser |
-
1989
- 1989-07-07 JP JP17624889A patent/JPH0339437A/en active Pending
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS63106A (en) * | 1987-05-15 | 1988-01-05 | 昭和アルミニウム株式会社 | Aluminum alloy foil for cathode of electrolytic capacitor |
| JPS63290238A (en) * | 1987-05-22 | 1988-11-28 | Toyo Alum Kk | Aluminum alloy foil for cathode of electrolytic condenser |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2010253233A (en) * | 2009-04-03 | 2010-11-11 | Taichi Hanmyo | Dressing table |
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