JP2001006984A - Electrode foil for aluminum electrolytic capacitor and its manufacture - Google Patents
Electrode foil for aluminum electrolytic capacitor and its manufactureInfo
- Publication number
- JP2001006984A JP2001006984A JP11176189A JP17618999A JP2001006984A JP 2001006984 A JP2001006984 A JP 2001006984A JP 11176189 A JP11176189 A JP 11176189A JP 17618999 A JP17618999 A JP 17618999A JP 2001006984 A JP2001006984 A JP 2001006984A
- Authority
- JP
- Japan
- Prior art keywords
- solution
- acid
- phosphorous acid
- coating film
- electrode 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.)
- Granted
Links
Abstract
Description
【０００１】[0001]
【発明の属する技術分野】本発明はアルミニウム電解コ
ンデンサ用電極箔およびその製造方法に関するものであ
る。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an electrode foil for an aluminum electrolytic capacitor and a method for producing the same.
【０００２】[0002]
【従来の技術】従来、アルミニウム電解コンデンサ用電
極箔は陽極酸化処理を行った後、オルトリン酸に浸漬処
理して２５０〜３００℃で乾燥し電極箔としていた。2. Description of the Related Art Conventionally, an electrode foil for an aluminum electrolytic capacitor has been subjected to anodizing treatment, then immersed in orthophosphoric acid, and dried at 250 to 300 ° C. to form an electrode foil.
【０００３】[0003]
【発明が解決しようとする課題】しかし、上記電極箔は
電解液中の水分との反応を抑制する効果はあったが、電
解液の劣化により陽極酸化皮膜の溶解が起こり製品特性
が悪化し、弁作動する問題があった。However, although the above-mentioned electrode foil has the effect of suppressing the reaction with moisture in the electrolytic solution, the degradation of the electrolytic solution causes the dissolution of the anodic oxide film, thereby deteriorating the product characteristics. There was a problem of valve operation.
【０００４】[0004]
【課題を解決するための手段】上記課題を解決するため
に本発明は、陽極酸化皮膜に亜リン酸皮膜または亜リン
酸とオルトリン酸の複合皮膜を形成することで、耐水和
性とともに耐酸性を向上した電極箔を提供するものであ
る。すなわち、エッチングされたアルミニウム箔に陽極
酸化皮膜と、亜リン酸皮膜またはオルトリン酸と亜リン
酸の複合皮膜とを形成したことを特徴とするアルミニウ
ム電解コンデンサ用電極箔である。In order to solve the above problems, the present invention provides a phosphorous acid film or a composite film of phosphorous acid and orthophosphoric acid on an anodic oxide film to provide an acid resistance as well as a hydration resistance. It is intended to provide an electrode foil having improved characteristics. That is, an electrode foil for an aluminum electrolytic capacitor, wherein an anodized film and a phosphorous acid film or a composite film of orthophosphoric acid and phosphorous acid are formed on an etched aluminum foil.
【０００５】そして、上記亜リン酸皮膜が、液温２０〜
５０℃、濃度３〜２０ｇ／Ｌの亜リン酸溶液に浸漬処理
後、または該溶液を噴霧若しくは塗布した後、２００〜
３００℃で乾燥してなることを特徴とするアルミニウム
電解コンデンサ用電極箔の製造方法である。When the phosphorous acid film has a liquid temperature of 20 to
After immersion in a phosphoric acid solution having a concentration of 3 to 20 g / L at 50 ° C., or after spraying or applying the solution, 200 to 200 g
A method for producing an electrode foil for an aluminum electrolytic capacitor, which is dried at 300 ° C.
【０００６】上記オルトリン酸と亜リン酸の複合皮膜
が、液温２０〜５０℃、オルトリン酸を０．５ｇ／Ｌ以
上と亜リン酸を２ｇ／Ｌ以上で、かつ混合量が３〜２０
ｇ／Ｌの混合溶液に浸漬処理後、または該混合溶液を噴
霧若しくは塗布した後、２００〜３００℃で乾燥してな
ることを特徴とするアルミニウム電解コンデンサ用電極
箔の製造方法である。The composite film of orthophosphoric acid and phosphorous acid has a liquid temperature of 20 to 50 ° C., an orthophosphoric acid of 0.5 g / L or more, a phosphorous acid of 2 g / L or more, and a mixing amount of 3 to 20 g / L.
A method for producing an electrode foil for an aluminum electrolytic capacitor, characterized in that it is immersed in a mixed solution of g / L or sprayed or applied with the mixed solution and then dried at 200 to 300 ° C.
【０００７】[0007]
【発明の実施の形態】本発明は、エッチングされたアル
ミニウム箔を陽極酸化処理した後、亜リン酸溶液または
オルトリン酸と亜リン酸との混合溶液中に浸漬処理、ま
たは溶液を噴霧若しくは塗布し、乾燥することにより耐
酸性に優れた皮膜を形成できる。よって、電解液が劣化
により酸性側になっても陽極酸化皮膜の溶解が抑制さ
れ、製品特性の悪化を抑えることができる。BEST MODE FOR CARRYING OUT THE INVENTION The present invention provides an anodized aluminum foil which has been etched and then immersed in a phosphorous acid solution or a mixed solution of orthophosphoric acid and phosphorous acid, or sprayed or coated with the solution. By drying, a film having excellent acid resistance can be formed. Therefore, even if the electrolytic solution becomes acidic due to deterioration, dissolution of the anodic oxide film is suppressed, and deterioration of product characteristics can be suppressed.
【０００８】[0008]
【実施例】以下、本発明の実施例について説明する。エ
ッチングされたアルミニウム箔に公知の方法で陽極酸化
皮膜を形成し、表１の水溶液に６０秒浸漬処理後、乾燥
して化成箔とした。上記化成箔を劣化した電解液相当の
ｐＨ３．０、液温８５℃の水溶液に１００時間浸漬し、
耐電圧（Ｖ−Ｔ）と静電容量とを測定した。Embodiments of the present invention will be described below. An anodized film was formed on the etched aluminum foil by a known method, immersed in the aqueous solution shown in Table 1 for 60 seconds, and then dried to form a chemical conversion foil. The chemical conversion foil was immersed in an aqueous solution having a pH of 3.0 and a liquid temperature of 85 ° C. for 100 hours corresponding to the deteriorated electrolytic solution,
The withstand voltage (VT) and the capacitance were measured.
【０００９】[0009]
【表１】 [Table 1]
【００１０】表１から明らかなように、本発明による実
施例１〜９は酸性溶液に浸漬してもＶ−Ｔ、静電容量の
低下が見られなかった。As is apparent from Table 1, in Examples 1 to 9 according to the present invention, no decrease in VT or capacitance was observed even when immersed in an acidic solution.
【００１１】亜リン酸濃度が３ｇ／Ｌ未満では、亜リン
酸溶液が薄すぎて亜リン酸皮膜が充分に形成されず、酸
による陽極酸化皮膜の溶解が起こってしまい、２０ｇ／
Ｌを超えると、亜リン酸が陽極酸化皮膜を溶解させるの
で耐電圧、静電容量が減少し、問題である。従って、亜
リン酸濃度は３〜２０ｇ／Ｌが好ましい。If the phosphorous acid concentration is less than 3 g / L, the phosphorous acid solution is too thin to form a phosphorous acid film sufficiently, so that the anodic oxide film is dissolved by an acid, resulting in 20 g / L.
If it exceeds L, phosphorous acid dissolves the anodic oxide film, so that the withstand voltage and the capacitance decrease, which is a problem. Therefore, the phosphorous acid concentration is preferably 3 to 20 g / L.
【００１２】また、浸漬液温が２０℃未満では亜リン酸
のアルミニウム酸化皮膜への付着が少なく亜リン酸皮膜
が充分に形成されず、逆に５０℃を超えると亜リン酸が
陽極酸化皮膜を溶解させるので耐電圧、静電容量が減少
し、問題である。従って、浸漬温度は２０〜５０℃が好
ましい。When the temperature of the immersion liquid is less than 20 ° C., the phosphorous acid does not adhere to the aluminum oxide film so much that the phosphorous acid film is not sufficiently formed. Is dissolved, so that the withstand voltage and the capacitance are reduced, which is a problem. Therefore, the immersion temperature is preferably 20 to 50 ° C.
【００１３】さらに、乾燥温度が２００℃未満では皮膜
形成反応が充分に進まず問題であり、３００℃を超える
と亜リン酸と箔が過剰に反応し、耐電圧、静電容量が減
少するので問題である。従って、乾燥温度は２００〜３
００℃が好ましい。Further, if the drying temperature is lower than 200 ° C., the film formation reaction does not proceed sufficiently. If the drying temperature is higher than 300 ° C., the phosphorous acid and the foil react excessively, and the withstand voltage and the capacitance decrease. It is a problem. Therefore, the drying temperature is 200-3.
00 ° C is preferred.
【００１４】また、オルトリン酸と亜リン酸とを混合す
る場合、その混合量が３ｇ／Ｌ未満では溶液濃度が薄す
ぎて混合皮膜が充分に形成されず問題であり、２０ｇ／
Ｌを超えると陽極酸化皮膜が溶解し耐電圧、静電容量が
減少し問題である。従って、オルトリン酸と亜リン酸と
の混合量は３〜２０ｇ／Ｌが好ましい。When orthophosphoric acid and phosphorous acid are mixed, if the mixing amount is less than 3 g / L, the solution concentration is too low to form a mixed film sufficiently, which is a problem.
If it exceeds L, the anodized film is dissolved, and the withstand voltage and the capacitance are reduced, which is a problem. Therefore, the mixing amount of orthophosphoric acid and phosphorous acid is preferably 3 to 20 g / L.
【００１５】実施例では亜リン酸溶液またはオルトリン
酸と亜リン酸との混合溶液に浸漬処理後乾燥したが、亜
リン酸溶液またはオルトリン酸と亜リン酸との混合溶液
を塗布若しくは霧状に噴霧後乾燥しても同様の効果があ
った。[0015] In the embodiment, the coating was immersed in a phosphorous acid solution or a mixed solution of orthophosphoric acid and phosphorous acid, and then dried. Drying after spraying had the same effect.
【００１６】[0016]
【発明の効果】上記のように本発明は、亜リン酸皮膜ま
たはオルトリン酸と亜リン酸との混合皮膜を形成するこ
とで、従来のオルトリン酸皮膜より強固な皮膜が形成さ
れるため、電解コンデンサ中の電解液が劣化して酸性側
になっても陽極酸化皮膜の溶解が起こらなくなり、コン
デンサ特性を維持できる。よって、その実用的価値は大
なるものである。As described above, according to the present invention, the formation of a phosphorous acid film or a mixed film of orthophosphoric acid and phosphorous acid forms a film stronger than the conventional orthophosphoric acid film. Even if the electrolytic solution in the capacitor deteriorates and becomes acidic, the anodic oxide film does not dissolve and the capacitor characteristics can be maintained. Therefore, its practical value is great.
───────────────────────────────────────────────────── フロントページの続き (51)Int.Cl.7 識別記号 ＦＩ テーマコート゛(参考） Ｃ２２Ｆ 1/04 Ｈ０１Ｇ 9/04 ３４６ ──────────────────────────────────────────────────続 き Continued on the front page (51) Int.Cl. 7 Identification symbol FI theme coat ゛ (Reference) C22F 1/04 H01G 9/04 346
Claims (3)
酸化皮膜と、亜リン酸皮膜またはオルトリン酸と亜リン
酸の複合皮膜とを形成したことを特徴とするアルミニウ
ム電解コンデンサ用電極箔。1. An electrode foil for an aluminum electrolytic capacitor, wherein an anodized film and a phosphorous acid film or a composite film of orthophosphoric acid and phosphorous acid are formed on an etched aluminum foil.
℃、濃度３〜２０ｇ／Ｌの亜リン酸溶液に浸漬処理後、
または該溶液を噴霧若しくは塗布した後、２００〜３０
０℃で乾燥してなることを特徴とする請求項１記載のア
ルミニウム電解コンデンサ用電極箔の製造方法。2. The method according to claim 1, wherein the phosphorous acid film has a liquid temperature of 20 to 50.
C., after immersion treatment in a phosphorous acid solution having a concentration of 3 to 20 g / L,
Or, after spraying or applying the solution, 200 to 30
The method for producing an electrode foil for an aluminum electrolytic capacitor according to claim 1, wherein the electrode foil is dried at 0 ° C.
が、液温２０〜５０℃、オルトリン酸を０．５ｇ／Ｌ以
上と亜リン酸を２ｇ／Ｌ以上で、かつ混合量が３〜２０
ｇ／Ｌの混合溶液に浸漬処理後、または該混合溶液を噴
霧若しくは塗布した後、２００〜３００℃で乾燥してな
ることを特徴とする請求項１記載のアルミニウム電解コ
ンデンサ用電極箔の製造方法。3. The composite film of orthophosphoric acid and phosphorous acid has a liquid temperature of 20 to 50 ° C., an orthophosphoric acid of 0.5 g / L or more, a phosphorous acid of 2 g / L or more, and a mixing amount of 3 to 3 g / L. 20
2. The method for producing an electrode foil for an aluminum electrolytic capacitor according to claim 1, wherein the electrode foil is dried at 200 to 300 [deg.] C. after dipping in a mixed solution of g / L or spraying or applying the mixed solution. .
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP17618999A JP4242515B2 (en) | 1999-06-23 | 1999-06-23 | Electrode foil for aluminum electrolytic capacitor and method for producing the same |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP17618999A JP4242515B2 (en) | 1999-06-23 | 1999-06-23 | Electrode foil for aluminum electrolytic capacitor and method for producing the same |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JP2001006984A true JP2001006984A (en) | 2001-01-12 |
| JP4242515B2 JP4242515B2 (en) | 2009-03-25 |
Family
ID=16009210
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP17618999A Expired - Fee Related JP4242515B2 (en) | 1999-06-23 | 1999-06-23 | Electrode foil for aluminum electrolytic capacitor and method for producing the same |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JP4242515B2 (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101527202B (en) * | 2009-04-24 | 2012-02-15 | 南京理工大学 | Oxidized grapheme/polyaniline super capacitor composite electrode material and preparation method |
-
1999
- 1999-06-23 JP JP17618999A patent/JP4242515B2/en not_active Expired - Fee Related
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101527202B (en) * | 2009-04-24 | 2012-02-15 | 南京理工大学 | Oxidized grapheme/polyaniline super capacitor composite electrode material and preparation method |
Also Published As
| Publication number | Publication date |
|---|---|
| JP4242515B2 (en) | 2009-03-25 |
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