JPS61163628A - Chemical synthesization of aluminum electrode foil for electrolytic capacitor - Google Patents
Chemical synthesization of aluminum electrode foil for electrolytic capacitorInfo
- Publication number
- JPS61163628A JPS61163628A JP458785A JP458785A JPS61163628A JP S61163628 A JPS61163628 A JP S61163628A JP 458785 A JP458785 A JP 458785A JP 458785 A JP458785 A JP 458785A JP S61163628 A JPS61163628 A JP S61163628A
- Authority
- JP
- Japan
- Prior art keywords
- electrode foil
- aluminum electrode
- electrolytic capacitor
- chemical
- synthesization
- 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
Abstract
(57)【要約】本公報は電子出願前の出願データであるた
め要約のデータは記録されません。(57) [Summary] This bulletin contains application data before electronic filing, so abstract data is not recorded.
Description
【発明の詳細な説明】
（イ）産業上の利用分野
本発明は電解コンデンサ用アルミニウム電極箔の化成方
法の改良に関するものである。DETAILED DESCRIPTION OF THE INVENTION (a) Field of Industrial Application The present invention relates to an improvement in a method for forming aluminum electrode foil for electrolytic capacitors.
（ロ）従来の技術
化成処理は周知の如く電解液中で通電電解して陽極表面
に酸化物をつくり、酸化膜を生成する処理である。従来
このアルミニウム電極箔の化成処理番こ使用する電解液
として硼酸に硼砂またはアンモニアを加えたものが多く
使用されてきた。しかし、これら酸性液では陽極酸化膜
の電気絶縁性が良くない。(b) Conventional technology As is well known, chemical conversion treatment is a treatment in which an oxide is formed on the surface of an anode by conducting electrolysis in an electrolytic solution to form an oxide film. Conventionally, the electrolytic solution used in this chemical conversion treatment of aluminum electrode foil has often been a solution prepared by adding borax or ammonia to boric acid. However, with these acidic solutions, the electrical insulation properties of the anodic oxide film are not good.
そこで、特公昭５５−２８４１１号公報番こ提案されて
いるように、これら電解液中に硅酸す） ＩＪウム、珪
酸カリ等を添加して、化成処理後の静電容量を増大せし
める方法がある。Therefore, as proposed in Japanese Patent Publication No. 55-28411, there is a method of adding silicic acid, potassium silicate, etc. to these electrolytic solutions to increase the capacitance after chemical conversion treatment. be.
しかしながら上述した添加物を電解液中易と添加した場
合には、漏れ電流が増大するのであまり実用的ではない
。However, when the above-mentioned additives are added to the electrolyte, the leakage current increases, which is not very practical.
（ハ）発明が解決しようとする問題点
本発明は、化成処理後の静電容量を大幅に増大させ、且
つ漏れ電流の小さいアルミニウム電極箔を提供せんとす
るものである。(c) Problems to be Solved by the Invention The present invention aims to provide an aluminum electrode foil that significantly increases the capacitance after chemical conversion treatment and has a small leakage current.
に）問題点を解決するための手段 本発明は、耐電圧性酸化皮膜を陽極酸化の化成とする。) measures to resolve the problem; In the present invention, the voltage-resistant oxide film is formed by anodic oxidation.
（ホ）作用
本発明法によれば、静電容量を大幅に増大させるととも
に、漏れ電流の小さいアルミニウム電極箔ができる。(E) Function According to the method of the present invention, an aluminum electrode foil with significantly increased capacitance and low leakage current can be produced.
（へ）実施例
１−を溶解した電解液ρとを準備し、夫々の電解液に第
１表に示すような添加物を添加した化成処理用電解液（
へ）〜ｎを準備した。(f) An electrolytic solution ρ in which Example 1- was dissolved was prepared, and an electrolytic solution for chemical conversion treatment (
) to n were prepared.
第 １ 表
上記電解液＾〜０を用いて化成処理を行った結果を第２
表に示す。Table 1 shows the results of chemical conversion treatment using the above electrolyte ^~0.
Shown in the table.
尚、アルミニウム電極箔は市販のエツチドアルミニウム
を使用し、各電解液８０℃の浴中で５３０Ｖで化成した
。そして、エツチドアルミニウム箔の化成処理は、浸漬
後４０ｍＡ／ｄの電流密度で所定電圧まで化成した後、
１０分間の加電、２分間の熱処理を数回繰り返した。The aluminum electrode foil used was commercially available etched aluminum, and was chemically formed in each electrolytic solution at 530 V in a bath at 80°C. The chemical conversion treatment of the etched aluminum foil is performed by chemically converting the etched aluminum foil to a predetermined voltage at a current density of 40 mA/d after dipping, and then
Electricity application for 10 minutes and heat treatment for 2 minutes were repeated several times.
第２表
第２表に示すように、本発明法にて化成処理を行うと、
静電容量が増加し、且漏れ電流も小さいことがわかる。As shown in Table 2, when chemical conversion treatment is performed using the method of the present invention,
It can be seen that the capacitance increases and the leakage current is also small.
これは、腐食構造物の微細孔につまった水酸化アルミニ
ウムがデンプンや糖類と錯体を形成し、溶解し、電解液
による滑石が防止できるためであると考えられる。この
ことによって、アルミニウム箔表面はｒ −ＡＩ！２０
ｘ に近い酸化皮膜だけが形成されると考えられる。This is thought to be because aluminum hydroxide stuck in the micropores of the corroded structure forms a complex with starch and saccharides, dissolves, and prevents talc formation caused by the electrolyte. By this, the aluminum foil surface becomes r -AI! 20
It is thought that only an oxide film close to x is formed.
つぎに、前述した電解液ｑを用い、そのデンプン濃度に
対する静電容量の増加率を測定した結果を第１図に示す
。Next, using the electrolytic solution q described above, the rate of increase in capacitance with respect to the starch concentration was measured, and the results are shown in FIG.
第１図より明らかなように、デンプンの添加量は２００
ＰＰＭ以上で効果があり、さらに５００１’ＰＭ以上が
より好ましいことがわかる。As is clear from Figure 1, the amount of starch added is 200
It can be seen that it is effective at PPM or more, and more preferably 5001'PM or more.
（ト）発明の詳細
な説明したように、本発明によれば、静電容置が大きく
、且つ漏れ電流の小さい電解コンデンサ用アルミニウム
電極箔を製造することができる。(G) As described in detail, according to the present invention, it is possible to manufacture an aluminum electrode foil for an electrolytic capacitor that has a large capacitance and a small leakage current.
第１図はデンプンの濃度と静電容量の増加率との関係を
示す特性図である。FIG. 1 is a characteristic diagram showing the relationship between the concentration of starch and the rate of increase in capacitance.
Claims (1)
成するに当り、電解液中に、デンプンまたは糖類を２０
０ＰＰＭ以上添加して陽極酸化することを特徴とする電
解コンデンサ用アルミニウム電極箔の化成方法。(1) When producing a voltage-resistant oxide film by chemical conversion treatment of anodic oxidation, 20% of starch or sugar is added to the electrolyte.
A method for forming an aluminum electrode foil for an electrolytic capacitor, which comprises adding 0 PPM or more and anodizing it.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP458785A JPS61163628A (en) | 1985-01-14 | 1985-01-14 | Chemical synthesization of aluminum electrode foil for electrolytic capacitor |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP458785A JPS61163628A (en) | 1985-01-14 | 1985-01-14 | Chemical synthesization of aluminum electrode foil for electrolytic capacitor |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPS61163628A true JPS61163628A (en) | 1986-07-24 |
Family
ID=11588167
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP458785A Pending JPS61163628A (en) | 1985-01-14 | 1985-01-14 | Chemical synthesization of aluminum electrode foil for electrolytic capacitor |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS61163628A (en) |
-
1985
- 1985-01-14 JP JP458785A patent/JPS61163628A/en active Pending
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