JPH01321622A - Manufacture of electrode foil for aluminum electrolytic capacitor - Google Patents
Manufacture of electrode foil for aluminum electrolytic capacitorInfo
- Publication number
- JPH01321622A JPH01321622A JP15392488A JP15392488A JPH01321622A JP H01321622 A JPH01321622 A JP H01321622A JP 15392488 A JP15392488 A JP 15392488A JP 15392488 A JP15392488 A JP 15392488A JP H01321622 A JPH01321622 A JP H01321622A
- Authority
- JP
- Japan
- Prior art keywords
- acid
- foil
- aluminum
- chemical conversion
- aqueous solution
- 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 25
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 title claims abstract description 18
- 229910052782 aluminium Inorganic materials 0.000 title claims abstract description 18
- 239000003990 capacitor Substances 0.000 title claims abstract description 10
- 238000004519 manufacturing process Methods 0.000 title claims description 3
- 239000007864 aqueous solution Substances 0.000 claims abstract description 9
- 238000006243 chemical reaction Methods 0.000 claims abstract description 9
- OFOBLEOULBTSOW-UHFFFAOYSA-N Propanedioic acid Natural products OC(=O)CC(O)=O OFOBLEOULBTSOW-UHFFFAOYSA-N 0.000 claims abstract description 7
- 239000000126 substance Substances 0.000 claims abstract description 7
- 238000000034 method Methods 0.000 claims 1
- 239000003792 electrolyte Substances 0.000 abstract description 7
- MUBZPKHOEPUJKR-UHFFFAOYSA-N Oxalic acid Chemical compound OC(=O)C(O)=O MUBZPKHOEPUJKR-UHFFFAOYSA-N 0.000 abstract description 6
- VZCYOOQTPOCHFL-OWOJBTEDSA-N Fumaric acid Chemical compound OC(=O)\C=C\C(O)=O VZCYOOQTPOCHFL-OWOJBTEDSA-N 0.000 abstract description 4
- WNLRTRBMVRJNCN-UHFFFAOYSA-N adipic acid Chemical compound OC(=O)CCCCC(O)=O WNLRTRBMVRJNCN-UHFFFAOYSA-N 0.000 abstract description 4
- VZCYOOQTPOCHFL-UHFFFAOYSA-N trans-butenedioic acid Natural products OC(=O)C=CC(O)=O VZCYOOQTPOCHFL-UHFFFAOYSA-N 0.000 abstract description 4
- 230000000694 effects Effects 0.000 abstract description 3
- BJEPYKJPYRNKOW-REOHCLBHSA-N (S)-malic acid Chemical compound OC(=O)[C@@H](O)CC(O)=O BJEPYKJPYRNKOW-REOHCLBHSA-N 0.000 abstract description 2
- FEWJPZIEWOKRBE-JCYAYHJZSA-N Dextrotartaric acid Chemical compound OC(=O)[C@H](O)[C@@H](O)C(O)=O FEWJPZIEWOKRBE-JCYAYHJZSA-N 0.000 abstract description 2
- FEWJPZIEWOKRBE-UHFFFAOYSA-N Tartaric acid Natural products [H+].[H+].[O-]C(=O)C(O)C(O)C([O-])=O FEWJPZIEWOKRBE-UHFFFAOYSA-N 0.000 abstract description 2
- 239000001361 adipic acid Substances 0.000 abstract description 2
- 235000011037 adipic acid Nutrition 0.000 abstract description 2
- BJEPYKJPYRNKOW-UHFFFAOYSA-N alpha-hydroxysuccinic acid Natural products OC(=O)C(O)CC(O)=O BJEPYKJPYRNKOW-UHFFFAOYSA-N 0.000 abstract description 2
- 238000007739 conversion coating Methods 0.000 abstract description 2
- 238000003487 electrochemical reaction Methods 0.000 abstract description 2
- 239000001530 fumaric acid Substances 0.000 abstract description 2
- VZCYOOQTPOCHFL-UPHRSURJSA-N maleic acid Chemical compound OC(=O)\C=C/C(O)=O VZCYOOQTPOCHFL-UPHRSURJSA-N 0.000 abstract description 2
- 239000011976 maleic acid Substances 0.000 abstract description 2
- 239000001630 malic acid Substances 0.000 abstract description 2
- 235000011090 malic acid Nutrition 0.000 abstract description 2
- 239000000203 mixture Substances 0.000 abstract description 2
- 235000006408 oxalic acid Nutrition 0.000 abstract description 2
- 230000001681 protective effect Effects 0.000 abstract description 2
- 239000011975 tartaric acid Substances 0.000 abstract description 2
- 235000002906 tartaric acid Nutrition 0.000 abstract description 2
- 239000002253 acid Substances 0.000 abstract 4
- 238000010521 absorption reaction Methods 0.000 abstract 2
- 230000015572 biosynthetic process Effects 0.000 abstract 1
- 238000002791 soaking Methods 0.000 abstract 1
- 238000001179 sorption measurement Methods 0.000 description 3
- 239000000243 solution Substances 0.000 description 2
- 150000001991 dicarboxylic acids Chemical class 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 238000005530 etching Methods 0.000 description 1
- 238000007654 immersion Methods 0.000 description 1
- 238000009413 insulation Methods 0.000 description 1
- 239000004973 liquid crystal related substance Substances 0.000 description 1
- 238000004804 winding Methods 0.000 description 1
Abstract
Description
【発明の詳細な説明】
産業上の利用分野
本発明は、各種電子機器に利用されるアルミ電解コンデ
ンサ用電極箔の製造方法に関するものである。DETAILED DESCRIPTION OF THE INVENTION Field of Industrial Application The present invention relates to a method of manufacturing electrode foil for aluminum electrolytic capacitors used in various electronic devices.
従来の技術
従来、アルミ電解コンデンサは、電解エツチングを行な
い、実効表面積を拡大した電極箔の表面に、化成処理に
より、誘電体酸化皮膜を形成し、セパレータと共に巻回
して、駆動用電解液を含浸して構成していた。Conventional technology Conventionally, aluminum electrolytic capacitors are made by electrolytically etching the electrode foil to expand its effective surface area, forming a dielectric oxide film through chemical conversion treatment on the surface of the electrode foil, then winding it together with a separator and impregnating it with a driving electrolyte. It was configured as follows.
内部の電極箔は、単に高温で電解液と接して使用されて
いる。電極箔表面の酸化皮膜は、高温中で電解液と接し
ていると、もれ電流が流れることにより、電解液と化学
反応を起こし、徐々に絶縁性が劣化して行く。その結果
コンデンサの故障に至るのである。The inner electrode foil is simply used in contact with the electrolyte at high temperature. When the oxide film on the surface of the electrode foil comes into contact with the electrolyte at high temperatures, a leakage current flows, causing a chemical reaction with the electrolyte, and the insulation gradually deteriorates. This results in capacitor failure.
発明が解決しようとする課題
従来の電極箔では、酸化皮膜の耐熱性、もれ電流値が不
十分であり、その電極箔を用いたアルミ電解コンデンサ
の信頼性は不十分であった。Problems to be Solved by the Invention In conventional electrode foils, the heat resistance of the oxide film and the leakage current value were insufficient, and the reliability of aluminum electrolytic capacitors using such electrode foils was insufficient.
本発明は電極における耐熱性及びもれ電流特性を改善す
ることを目的とする。The present invention aims to improve the heat resistance and leakage current characteristics of an electrode.
課題を解決するための手段
本発明は、従来の欠点を解決するために、化成箔をジカ
ルボン酸水溶液に浸漬するものであり、ジカルボン酸水
溶液としてフマル酸、マレイン酸。Means for Solving the Problems In the present invention, in order to solve the conventional drawbacks, a chemically formed foil is immersed in a dicarboxylic acid aqueous solution, and fumaric acid and maleic acid are used as the dicarboxylic acid aqueous solution.
リンゴ酸、酒石酸、アジピン酸、シュウ酸のいずれか１
穏あるいはこれらの混合物からなる水溶液に浸漬するも
のである。Any one of malic acid, tartaric acid, adipic acid, and oxalic acid
It is immersed in an aqueous solution consisting of a mild solution or a mixture of these.
作用 本発明による技術的作用は以下の通りである。action The technical effects according to the present invention are as follows.
ジカルボン酸は、アルミ化成皮膜上への吸着力が強く、
アルミニウム化成箔を、ジカルボン酸水溶液に浸漬する
と、化成箔表面に、吸着層を形成する。その吸着層が保
護膜の役目を果たし、電解液との化学反応を抑制する。Dicarboxylic acids have strong adsorption power on aluminum conversion coatings,
When chemically formed aluminum foil is immersed in an aqueous dicarboxylic acid solution, an adsorption layer is formed on the surface of the chemically formed foil. The adsorption layer acts as a protective film and suppresses chemical reactions with the electrolyte.
その結果、アルミニウム箔を用いた電極箔のもれ電流値
が低下し、耐熱性が向上し、しいてはアルミ電解コンデ
ンサの信頼性が向上するのである。As a result, the leakage current value of the electrode foil using aluminum foil is reduced, the heat resistance is improved, and the reliability of the aluminum electrolytic capacitor is improved.
実施例
粗面化したアルミニウム箔表面に化成処理による誘電体
酸化皮膜を形成した電極箔を表１に示す水溶液に浸漬す
る。水溶液は表１液晶６０’Ｃで１分間浸漬した。EXAMPLE An electrode foil on which a dielectric oxide film was formed by chemical conversion treatment on the surface of a roughened aluminum foil was immersed in an aqueous solution shown in Table 1. The aqueous solution was immersed in Table 1 Liquid Crystal 60'C for 1 minute.
表１ 次に、それぞれの電極箔を用いて、２００Ｖ 。Table 1 Next, apply 200V using each electrode foil.
６８０ ｕＦの定格のアルミ電解コンデンサヲ形成して
、もれ電流値を測定する。この結果を表２に示す。An aluminum electrolytic capacitor rated at 680 uF is formed and the leakage current value is measured. The results are shown in Table 2.
表２
上記のように、ジカルボン酸に浸漬することにより、も
れ電流が低減できる。その結果電解液との電気化学反応
が抑制され、耐熱性が向上するのである。Table 2 As described above, leakage current can be reduced by immersion in dicarboxylic acid. As a result, electrochemical reactions with the electrolyte are suppressed and heat resistance is improved.
発明の効果
ｉ・
以上のように、本発明によれば、電極箔のもれ電流の低
減と耐熱性の向上ができ、アルミ電解コンデンサの信頼
性が向上することができるのである。Effects of the Invention i. As described above, according to the present invention, the leakage current of the electrode foil can be reduced and the heat resistance can be improved, and the reliability of the aluminum electrolytic capacitor can be improved.
Claims (1)
酸化皮膜を形成し、ジカルボン酸水溶液に浸漬すること
を特徴とするアルミ電解コンデンサ用電極箔の製造方法
。A method for manufacturing an electrode foil for an aluminum electrolytic capacitor, which comprises forming a dielectric oxide film on a roughened aluminum foil surface by chemical conversion treatment, and immersing the film in a dicarboxylic acid aqueous solution.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP15392488A JPH01321622A (en) | 1988-06-22 | 1988-06-22 | Manufacture of electrode foil for aluminum electrolytic capacitor |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP15392488A JPH01321622A (en) | 1988-06-22 | 1988-06-22 | Manufacture of electrode foil for aluminum electrolytic capacitor |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPH01321622A true JPH01321622A (en) | 1989-12-27 |
Family
ID=15573062
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP15392488A Pending JPH01321622A (en) | 1988-06-22 | 1988-06-22 | Manufacture of electrode foil for aluminum electrolytic capacitor |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH01321622A (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH04116911A (en) * | 1990-09-07 | 1992-04-17 | Elna Co Ltd | Manufacture of electrode foil for aluminum electrolytic capacitor |
| JP2001332452A (en) * | 2000-05-24 | 2001-11-30 | Showa Denko Kk | Solid electrolytic capacitor and its manufacturing method |
Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS6037713A (en) * | 1983-08-10 | 1985-02-27 | 日立コンデンサ株式会社 | Method of producing aluminum foil for electrolytic condenser |
-
1988
- 1988-06-22 JP JP15392488A patent/JPH01321622A/en active Pending
Patent Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS6037713A (en) * | 1983-08-10 | 1985-02-27 | 日立コンデンサ株式会社 | Method of producing aluminum foil for electrolytic condenser |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH04116911A (en) * | 1990-09-07 | 1992-04-17 | Elna Co Ltd | Manufacture of electrode foil for aluminum electrolytic capacitor |
| JP2001332452A (en) * | 2000-05-24 | 2001-11-30 | Showa Denko Kk | Solid electrolytic capacitor and its manufacturing method |
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