AT155563B - Electrolytic capacitor. - Google Patents

Electrolytic capacitor.

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Publication number
AT155563B
AT155563B AT155563DA AT155563B AT 155563 B AT155563 B AT 155563B AT 155563D A AT155563D A AT 155563DA AT 155563 B AT155563 B AT 155563B
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Austria
Prior art keywords
electrolytic capacitor
capacitor
aluminum
plate
desc
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German (de)
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Philips Nv
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Publication of AT155563B publication Critical patent/AT155563B/en

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Description

  

   <Desc/Clms Page number 1> 
 



  Elektrolytischer Kondensator. 



   Bei elektrolytischen Kondensatoren, deren Elektroden aus einem Metallteil und einem mit Zuleitung versehenen Elektrolyten bestehen, während das Dielektrikum durch eine den Metallteil überziehende Oxydschicht gebildet wird, ist es schwierig, wenn praktisch brauchbare Dimensionen eingehalten werden sollen, eine genügende Kapazität des Kondensators zu erzielen. Die Herstellung 
 EMI1.1 
 



   Hervorzuheben ist ferner, dass es gerade der Kupfergehalt ganz ohne   Rücksicht   auf andere
Verunreinigungen ist, welcher für die beschriebene Art des Aufrauhens von Bedeutung ist. 



   Zum Aufrauhen nimmt man z. B. eine Aluminiumplatte mit den Abmessungen von   10 x 10 CM.   



  Diese Platte wird zunächst eine bestimmte Zeit in Kaliumhydroxyd gebracht und, nachdem sie abgespült worden ist, in Salzsäure eingetaucht. Nachdem sie von neuem abgespült worden ist, wird die Platte elektrolytisch oxydiert. 



   Die so erhaltene Platte kann nun als Elektrode in einem Kondensator verwendet werden, in der ein Kupfergefäss die Zuleitung für den Elektrolyten bildet, der aus einer Lösung von 20 g Borax und 40   q   Borsäure pro Liter Wasser besteht. 



   Dieser Kondensator eignet sich nun für Spannungen bis zu 430 Volt und es ergibt sich, dass die Kapazität wenigstens 16   Mikrofarad beträgt.   Ohne die beschriebene Behandlung würde die Kapazität höchstens 4 Mikrofarad betragen. 



   Natürlich sind eine grosse Anzahl von Änderungen in dem   Rauhverfahren möglich.   Beim Aufrauhen kann man der chemischen Behandlung eine Rauhung durch mechanische Mittel, z. B. durch Sandstrahlgebläse oder Stahlbürsten, vorausgehen lassen. Man kann auch mehrmals nacheinander abwechselnd beizen und elektrolytisch oxydieren. 



   Dadurch, dass gemäss der Erfindung Aluminium verwendet wird, das sehr wenig Kupfer enthält, ist die Möglichkeit gegeben, Verfahren zur Massenherstellung der Kondensatoren nach dem Rauhverfahren auszuarbeiten, mit dem nichtsdestoweniger ein besonders gleichmässiges Produkt erhalten wird. 



   Unter   günstigen Verhältnissen   hat es sich schon als möglich erwiesen, die   Kapazität für   eine Aluminiumplatte von   10x10 cm a, uf über 30 Mikrofarad   zu steigern. 



   Ferner kann der Kondensator auch für wesentlich höhere Spannungen als die erwähnte Spannung von 430 Volt hergestellt werden. 



   Die Aluminiumelektrode kann zusammengerollt und gefaltet werden, wenn sie aus Blech besteht, oder gewunden werden, wenn sie aus Metalldraht besteht. Draht von verschiedenem Profil kann zur Verwendung kommen. 

**WARNUNG** Ende DESC Feld kannt Anfang CLMS uberlappen**.



   <Desc / Clms Page number 1>
 



  Electrolytic capacitor.



   In the case of electrolytic capacitors whose electrodes consist of a metal part and an electrolyte provided with a lead, while the dielectric is formed by an oxide layer covering the metal part, it is difficult to achieve a sufficient capacitance of the capacitor if practically usable dimensions are to be adhered to. The production
 EMI1.1
 



   It should also be emphasized that it is precisely the copper content that has no regard for others
Impurities is what is important for the type of roughening described.



   For roughening you take z. B. an aluminum plate with the dimensions of 10 x 10 CM.



  This plate is first placed in potassium hydroxide for a certain time and, after it has been rinsed, immersed in hydrochloric acid. After it has been rinsed again, the plate is oxidized electrolytically.



   The plate obtained in this way can now be used as an electrode in a capacitor, in which a copper vessel forms the supply line for the electrolyte, which consists of a solution of 20 g borax and 40 q boric acid per liter of water.



   This capacitor is now suitable for voltages up to 430 volts and the result is that the capacitance is at least 16 microfarads. Without the treatment described, the capacitance would be at most 4 microfarads.



   Of course, a large number of changes in the roughing process are possible. When roughening, the chemical treatment can be roughened by mechanical means, e.g. B. by sandblasting or steel brushes, precede. You can also pickle and oxidize electrolytically several times in succession.



   The fact that, according to the invention, aluminum is used which contains very little copper makes it possible to work out methods for mass production of the capacitors by the roughing method, with which a particularly uniform product is nevertheless obtained.



   Under favorable conditions it has already been found possible to increase the capacity for an aluminum plate of 10x10 cm a to over 30 microfarads.



   Furthermore, the capacitor can also be produced for voltages significantly higher than the aforementioned voltage of 430 volts.



   The aluminum electrode can be rolled up and folded if it is made of sheet metal, or twisted if it is made of metal wire. Wire of different profile can be used.

** WARNING ** End of DESC field may overlap beginning of CLMS **.

 

Claims (1)

PATENT-ANSPRUCH : Elektrolytischer Kondensator mit wenigstens einer Elektrode aus Aluminium von weniger als 0'02% Hupfergehalt, die in bekannter Weise auf chemischem Wege gerauht ist. **WARNUNG** Ende CLMS Feld Kannt Anfang DESC uberlappen**. PATENT CLAIM: Electrolytic capacitor with at least one electrode made of aluminum with a copper content of less than 0.2%, which is chemically roughened in a known manner. ** WARNING ** End of CLMS field may overlap beginning of DESC **.
AT155563D 1932-03-10 1933-03-07 Electrolytic capacitor. AT155563B (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DE155563X 1932-03-10

Publications (1)

Publication Number Publication Date
AT155563B true AT155563B (en) 1939-02-10

Family

ID=5677082

Family Applications (1)

Application Number Title Priority Date Filing Date
AT155563D AT155563B (en) 1932-03-10 1933-03-07 Electrolytic capacitor.

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AT (1) AT155563B (en)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE914042C (en) * 1940-10-25 1954-06-24 Siemens Ag Process for the production of surface-enlarged electrodes, especially for electrolytic capacitors
DE976026C (en) * 1951-02-15 1963-01-17 Aluminium Walzwerke Singen Process for roughening aluminum foils

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE914042C (en) * 1940-10-25 1954-06-24 Siemens Ag Process for the production of surface-enlarged electrodes, especially for electrolytic capacitors
DE976026C (en) * 1951-02-15 1963-01-17 Aluminium Walzwerke Singen Process for roughening aluminum foils

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