JPS63115320A - Manufacture of aluminum electrode foil for electrolytic capacitor - Google Patents
Manufacture of aluminum electrode foil for electrolytic capacitorInfo
- Publication number
- JPS63115320A JPS63115320A JP26228286A JP26228286A JPS63115320A JP S63115320 A JPS63115320 A JP S63115320A JP 26228286 A JP26228286 A JP 26228286A JP 26228286 A JP26228286 A JP 26228286A JP S63115320 A JPS63115320 A JP S63115320A
- Authority
- JP
- Japan
- Prior art keywords
- electrode foil
- aluminum electrode
- electrolytic capacitor
- chemical conversion
- manufacture
- 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 description 13
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 title claims description 12
- 229910052782 aluminium Inorganic materials 0.000 title claims description 12
- 238000004519 manufacturing process Methods 0.000 title claims description 3
- 239000003990 capacitor Substances 0.000 title claims 2
- YCIMNLLNPGFGHC-UHFFFAOYSA-N catechol Chemical compound OC1=CC=CC=C1O YCIMNLLNPGFGHC-UHFFFAOYSA-N 0.000 claims description 12
- 238000006243 chemical reaction Methods 0.000 claims description 12
- 239000000126 substance Substances 0.000 claims description 12
- 239000008151 electrolyte solution Substances 0.000 claims description 7
- 230000003647 oxidation Effects 0.000 claims description 2
- 238000007254 oxidation reaction Methods 0.000 claims description 2
- 238000007743 anodising Methods 0.000 claims 1
- 238000000034 method Methods 0.000 description 5
- 239000003792 electrolyte Substances 0.000 description 4
- QGZKDVFQNNGYKY-UHFFFAOYSA-N Ammonia Chemical compound N QGZKDVFQNNGYKY-UHFFFAOYSA-N 0.000 description 2
- VHUUQVKOLVNVRT-UHFFFAOYSA-N Ammonium hydroxide Chemical compound [NH4+].[OH-] VHUUQVKOLVNVRT-UHFFFAOYSA-N 0.000 description 2
- WNLRTRBMVRJNCN-UHFFFAOYSA-N adipic acid Chemical compound OC(=O)CCCCC(O)=O WNLRTRBMVRJNCN-UHFFFAOYSA-N 0.000 description 2
- WNROFYMDJYEPJX-UHFFFAOYSA-K aluminium hydroxide Chemical compound [OH-].[OH-].[OH-].[Al+3] WNROFYMDJYEPJX-UHFFFAOYSA-K 0.000 description 2
- 235000011114 ammonium hydroxide Nutrition 0.000 description 2
- KGBXLFKZBHKPEV-UHFFFAOYSA-N boric acid Chemical compound OB(O)O KGBXLFKZBHKPEV-UHFFFAOYSA-N 0.000 description 2
- 239000004327 boric acid Substances 0.000 description 2
- 238000010438 heat treatment Methods 0.000 description 2
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 2
- UVAOEHSAFKLYID-UHFFFAOYSA-N 2-hydroxytetradecane-1,2,3-tricarboxylic acid Chemical compound CCCCCCCCCCCC(C(O)=O)C(O)(C(O)=O)CC(O)=O UVAOEHSAFKLYID-UHFFFAOYSA-N 0.000 description 1
- ZSLUVFAKFWKJRC-IGMARMGPSA-N 232Th Chemical compound [232Th] ZSLUVFAKFWKJRC-IGMARMGPSA-N 0.000 description 1
- BPQQTUXANYXVAA-UHFFFAOYSA-N Orthosilicate Chemical compound [O-][Si]([O-])([O-])[O-] BPQQTUXANYXVAA-UHFFFAOYSA-N 0.000 description 1
- 239000004111 Potassium silicate Substances 0.000 description 1
- 229910052776 Thorium Inorganic materials 0.000 description 1
- 239000003929 acidic solution Substances 0.000 description 1
- 239000000654 additive Substances 0.000 description 1
- 235000011037 adipic acid Nutrition 0.000 description 1
- 239000001361 adipic acid Substances 0.000 description 1
- 229910021529 ammonia Inorganic materials 0.000 description 1
- 239000010407 anodic oxide Substances 0.000 description 1
- 229910021538 borax Inorganic materials 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 238000010292 electrical insulation Methods 0.000 description 1
- 238000007654 immersion Methods 0.000 description 1
- 150000002596 lactones Chemical class 0.000 description 1
- NNHHDJVEYQHLHG-UHFFFAOYSA-N potassium silicate Chemical compound [K+].[K+].[O-][Si]([O-])=O NNHHDJVEYQHLHG-UHFFFAOYSA-N 0.000 description 1
- 229910052913 potassium silicate Inorganic materials 0.000 description 1
- 235000019353 potassium silicate Nutrition 0.000 description 1
- 239000004328 sodium tetraborate Substances 0.000 description 1
- 235000010339 sodium tetraborate Nutrition 0.000 description 1
Landscapes
- Chemical Treatment Of Metals (AREA)
- Fixed Capacitors And Capacitor Manufacturing Machines (AREA)
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) [Abstract] 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ナ用アルミ、−ウム電極箔の製造
方法に関し、特に、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 a method for manufacturing an aluminum electrode foil for an electrolytic condenser, and particularly to an improvement in a method for chemically forming an aluminum electrode foil.
く口）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で陽極表面
に酸化物をつくり、酸化膜を生成する処理である。(Explanation) Conventional technology As is well known, chemical conversion treatment is a process in which an oxide is created on the surface of the anode by electrolyzing the anode by energizing it in an electrolytic solution to form an oxide film.
従来、このアルミニウム電極箔の化成処理に使用する電
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。Conventionally, an electrolytic solution prepared by adding borax or ammonia to boric acid has often been used as an electrolytic solution for chemical conversion treatment of aluminum electrode foil.
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。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号公報に示されている
ように、これら電解液中に硅酸すトリウム、硅酸カリ等
を添加したり、あるいは、特公昭５９−７２０７号公報
に示されているように、３−ヒドロキシ−３・４デイカ
ルボキシーペンタデカノイック酸またはラクトン等を添
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 shown in Japanese Patent Publication No. 55-28411, thorium silicate, potassium silicate, etc. are added to these electrolytes, or as shown in Japanese Patent Publication No. 59-7207, There is a method of increasing the capacitance after chemical conversion treatment by adding 3-hydroxy-3,4-dicarboxypentadecanoic acid or lactone.
（ハ）発明が解決しようとする問題点
しかしながら、上述した添加物を電解液中に添加した場
合には、漏れ電流が増大するのであまり実用的ではない
。(c) Problems to be Solved by the Invention However, when the above-mentioned additives are added to the electrolytic solution, the leakage current increases, which is not very practical.
本発明は、化成処理後の静電容量を大幅に増大さ七、注
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。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.
（ニ）問題点を解決するための手段
本発明は、耐電圧性酸化被膜を陽極酸化の化成処理によ
り生成するに当り、電解液中に、カテコ−２＝
−ルをＩＯＰＰＭ以上温加することを特徴とする。(d) Means for Solving the Problems The present invention involves heating catechol-2=- to more than IOPPM in an electrolytic solution when producing a voltage-resistant oxide film by chemical conversion treatment of anodic oxidation. It is characterized by
（ホ） 作用
カテコールがアルミニウムを極箔表面に生じる耐圧のな
い水酸化アルミニウムを溶解することにより、化成被膜
が薄くなり静電容量が増大する。(e) Action Catechol dissolves aluminum hydroxide, which has no pressure resistance, which is generated on the surface of aluminum foil, thereby thinning the chemical conversion film and increasing capacitance.
（へ）実施例
純水１ｐ当りにホウ酸１００ｇ、ｆｉ度２５％のアンモ
ニア水３５ｍ！を溶解した電解液と、純水１ρ当りにア
ジピン酸５ｇ、ｆｉ度２５％のアンモニア水１ｍ！を溶
解した電解液とを準備し、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（Ａ）〜（Ｆ
）を準備した。(f) Example: 100 g of boric acid per 1 p of pure water, 35 m of ammonia water with a fi degree of 25%! 5g of adipic acid per 1ρ of pure water and 1m of ammonia water with a fi of 25%! Electrolytes for chemical conversion treatment (A) to (F
) was prepared.
（以下余白〉
第１表
」１記電解液（Ａ）〜（Ｆ）を用いて化成処理を行った
結果を第２表に示す。(Left below) Table 1 Table 2 shows the results of chemical conversion treatment using the electrolytes (A) to (F) described in Table 1.
尚、アルミニウム電極箔は市販のエツチドアルミニラｌ
を使用し、各電解液８０°Ｃ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／ｃｍ３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 is commercially available etched aluminum foil.
Each electrolyte was chemically converted in a bath at 80°C at 530V. The chemical conversion treatment of the etched aluminum foil was performed by chemically converting the foil to a predetermined voltage at a current density of 40 mA/cm3 after immersion, and then repeating electrical application for 10 minutes and heat treatment for 2 minutes 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、乱つ漏れ電流も小きいことがわかる
。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 turbulent leakage current is small.
これはカテコールがアルミニウム箔表面に生しる耐圧の
ない水酸化アルミニウムを溶解するために化成被膜が薄
くなり静電容量が増大するものと考えられる。This is thought to be because catechol dissolves aluminum hydroxide, which does not have a withstand voltage, that is generated on the surface of the aluminum foil, so that the chemical conversion film becomes thinner and the capacitance increases.
つぎに、前述した電解液（Ａ）を用い、そのカテコール
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 (A) described above, the rate of increase in capacitance with respect to the catechol concentration was measured, and the results were used in the first
As shown in the figure.
＝５−
第１図より明らかなように、カテコールの添加量はＩＯ
ＰＰＭ以上で効果があり、好ましくは、５０ＰＰＭ以上
であることがわかる。=5- As is clear from Figure 1, the amount of catechol added is IO
It can be seen that it is effective at PPM or more, and preferably 50 PPM or more.
（ト）発明の詳細
な説明したように、本発明によれば、静電容量が大きく
、且つ、漏れ電流の小さい電解コンテンザ用アルミニウ
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, an aluminum electrode foil for an electrolytic condenser having a large capacitance and a small leakage current can be manufactured.
第１図はカテコール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 catechol and the rate of increase in capacitance.
Claims (1)
成するに当り、電解液中に、カテコールを１０ＰＰＭ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製造方法。(1) A method for producing an aluminum electrode foil for an electrolytic capacitor, which comprises adding 10 PPM or more of catechol to an electrolytic solution and anodizing the voltage-resistant oxide film by anodic oxidation chemical conversion treatment.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP26228286A JPS63115320A (en) | 1986-11-04 | 1986-11-04 | Manufacture of aluminum electrode foil for electrolytic capacitor |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP26228286A JPS63115320A (en) | 1986-11-04 | 1986-11-04 | Manufacture of aluminum electrode foil for electrolytic capacitor |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPS63115320A true JPS63115320A (en) | 1988-05-19 |
Family
ID=17373624
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP26228286A Pending JPS63115320A (en) | 1986-11-04 | 1986-11-04 | Manufacture of aluminum electrode foil for electrolytic capacitor |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS63115320A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2018198744A1 (en) * | 2017-04-26 | 2018-11-01 | 株式会社Adeka | Chemical conversion liquid, method for chemically converting aluminum-containing base material, chemically converted base material, electrode material for aluminum electrolytic capacitor, and capacitor |
-
1986
- 1986-11-04 JP JP26228286A patent/JPS63115320A/en active Pending
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2018198744A1 (en) * | 2017-04-26 | 2018-11-01 | 株式会社Adeka | Chemical conversion liquid, method for chemically converting aluminum-containing base material, chemically converted base material, electrode material for aluminum electrolytic capacitor, and capacitor |
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