DE943303C - Process for enlarging the surface of electrodes for electrolytic capacitors - Google Patents

Process for enlarging the surface of electrodes for electrolytic capacitors

Info

Publication number
DE943303C
DE943303C DEN2149D DEN0002149D DE943303C DE 943303 C DE943303 C DE 943303C DE N2149 D DEN2149 D DE N2149D DE N0002149 D DEN0002149 D DE N0002149D DE 943303 C DE943303 C DE 943303C
Authority
DE
Germany
Prior art keywords
electrodes
enlarging
electrolytic capacitors
metal
electrode core
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.)
Expired
Application number
DEN2149D
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German (de)
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
MIJ TOT EXPLOITATIE VAN UITVIN
Original Assignee
MIJ TOT EXPLOITATIE VAN UITVIN
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by MIJ TOT EXPLOITATIE VAN UITVIN filed Critical MIJ TOT EXPLOITATIE VAN UITVIN
Application granted granted Critical
Publication of DE943303C publication Critical patent/DE943303C/en
Expired legal-status Critical Current

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Classifications

    • HELECTRICITY
    • H01ELECTRIC ELEMENTS
    • H01GCAPACITORS; CAPACITORS, RECTIFIERS, DETECTORS, SWITCHING DEVICES, LIGHT-SENSITIVE OR TEMPERATURE-SENSITIVE DEVICES OF THE ELECTROLYTIC TYPE
    • H01G9/00Electrolytic capacitors, rectifiers, detectors, switching devices, light-sensitive or temperature-sensitive devices; Processes of their manufacture
    • H01G9/004Details
    • H01G9/04Electrodes or formation of dielectric layers thereon
    • H01G9/048Electrodes or formation of dielectric layers thereon characterised by their structure
    • H01G9/055Etched foil electrodes
    • HELECTRICITY
    • H01ELECTRIC ELEMENTS
    • H01GCAPACITORS; CAPACITORS, RECTIFIERS, DETECTORS, SWITCHING DEVICES, LIGHT-SENSITIVE OR TEMPERATURE-SENSITIVE DEVICES OF THE ELECTROLYTIC TYPE
    • H01G9/00Electrolytic capacitors, rectifiers, detectors, switching devices, light-sensitive or temperature-sensitive devices; Processes of their manufacture
    • H01G9/004Details
    • H01G9/04Electrodes or formation of dielectric layers thereon
    • H01G9/048Electrodes or formation of dielectric layers thereon characterised by their structure
    • H01G9/052Sintered electrodes

Landscapes

  • Engineering & Computer Science (AREA)
  • Power Engineering (AREA)
  • Microelectronics & Electronic Packaging (AREA)
  • Fixed Capacitors And Capacitor Manufacturing Machines (AREA)

Description

Verfahren zur Vergrößerung der Oberfläche von Elektroden für Elektrolytkondensatoren Die Erfindung betrifft ein Verfahren zur Vergrößerting der Oberfläche von Elektroden für Elektrolytkondensatoren, bei dem der Elektrodenkern mit kleinen, vü#rzugsweise# aus dernselben Meta,11 wie der Elektrodenkern hestehenden Met211-teilche bedeckt ist.Process for increasing the surface area of electrodes for electrolytic capacitors The invention relates to a method for enlarging the surface of electrodes for electrolytic capacitors, in which the electrode core with small, preferably # from the same meta 11 as the electrode core covered Met211 particles is.

Bekanntlith wächst die Kapazität eines Kon#den7 satoirs p-ropo#rtion!al mit der Größe, der Elektroldenoberfläche und umgekehrt propertional mit der Dicke der Dielektrikumschicht zwischen den Elektroden. Dieder ETfin#dung zugrunde- liegende Aufgabe besteht deTin, bei elektrolyti-sthen Kondensajtoren eine sehr große EI-,Ictrodenobt-rfläche zu erhalten, so daß große Kapazitäten in einern ganz kleinen Ra= untergebraicht werden können.As it is known, the capacity of a con # den7 satoir p-ropo # rtion! Al is growing with the size, the electrode surface and vice versa proportionally with the thickness the dielectric layer between the electrodes. The underlying finding The task is deTin, with electrolytic capacitors a very large egg, ictrodenob-surface so that large capacities are subdivided into a very small Ra = can be.

Zu diesem Zweck ist bereits voirgeschilagen worden, die Elektrodenoberfläche aufzurauhen oder mit Unebenheiten zu versehen. Es hatsich gezeigt, daß durch Profilierung oder mechanisches Aufrauhen der Oberfläche mir ane geringe Vergrößerung erzielt wird. Bekanntlich entsteht durch Ätzen odar Beizen reiner Metalle eine Oberflächenaufranhung, da sich die verschiedenen KristaLle des Metalls mit ungleicher Geschwindigkeit im Ätzmittel lös-en.For this purpose, the electrode surface has already been voirgeschilagen to roughen or to provide bumps. It has been shown that by profiling or mechanical roughening of the surface achieved with a low magnification will. It is well known that pure metals are produced by etching or pickling a surface agglomeration, since the different crystals of the metal with dissolve in the etchant at unequal speed.

Trotzdem zeigt es sich. auch heim noirmalen Beizen von Aluminium,,dim ails Matarial für die eT-wähnten Elektrolden zunächst in Betracht kommt, daß die erwarterte besondere Vergrößerung der Oberfläche beim fertiggestellten Kondensator nicht auftritt, was, wenn man von deer -erwähnten Er-Kenntnis ausgefit, vermutlich der Tatsache zuzuschreiben istt, daß infolge der zu schnellen und wirksamen Beiebearbeitung die zuerst entstandenen Spitzen jeweüs wieder weggebeizt -werden.Nevertheless it shows. also used in noirmal pickling of aluminum, dim ails Matarial for the eT-mentioned Electrolden comes first into consideration that the expected particular enlargement of the surface of the completed condenser does not occur, which, if one is trained by the-mentioned He-Knowledge, presumably it is due to the fact that as a result of being processed too quickly and efficiently the tips that emerged first are pickled away again.

Es wurde auch schon voirgeschilagen, eine rauhe und po-röse, OL-!ejrfläche der Elektroden von Elektron lytkond,en-satoren dadurch zu erhalten, daß man die Oberflä,die, die später mit einem dielektri#schen Fil-m üb,eirz-olgen wird, der sitch den Unteibenheiten der MetaU, schicht anpaßt, durch Aufspritzen, eines film,hIldenden Metalls in geschmolzenem Zustand nach dem Prinzip des Scheopschen Metallspritzverfahrens auf eine steife Unterlage erzellgt.It has also been voirgeschilagen, a rough and porous, orienteering surface to obtain the electrodes of electron condensers by making the The surface that will later be covered with a dielectric film, the sitch to the inefficiencies of the metaU, adapts layer, by spraying on, a film, supporting Metal in a molten state according to the principle of Scheop's metal spraying process erected on a stiff surface.

Auch hierbei werden jedoch die aufgesp-ritzten Metallteilchen. mechanisch in erfie,'blichem Maße beansprucht. Da- das Metall in flüssigem oder doch nahezu flüssIgglem Zustand mit großer Gewaft auf die tragende , Oberfläche - aufgesichleudert wird, zeigen die einzelnen Pa#ftikel eihe wenn auch unjegelmäßIge, so. doch im wesentlichen, flache Gestalt, während gerade möglichst aufrecht stehende Vorsprünge erwünsicIlt sind.Here too, however, the split-open metal particles are removed. mechanically stressed to the usual extent. DA, the metal in liquid state or nearly flüssIgglem with great Gewaft to the supporting Surface area - is aufgesichleudert showing individual Pa # ftikel eIHE though unjegelmäßIge do so. but essentially flat shape, while protrusions that are as upright as possible are desirable.

Ein, wesentlich besseres Restiltat wird gemäß der Erfindung dadurch erhaken, daß Metallte-,ilchen in siuspendiertem Zustand auf dien Elektrodenkewn aufgebracht und südann mit seiner Oberfläche zusammengesintert werden. Hierbei ergibt sich noch der Vorteil, daß die Üblichen, sehT dünnen Elektrodenbleche verwendet warden. können, se daß der Materiialverbirauch gering bleibt, der Kondensator leicht ist und die Elektroden aufgarofit werden können. Die Bleche haben z. B. eine: Dicke von werriger aJs i nim.According to the invention, this results in a much better restiltat hook that metal parts, in a suspended state, on the electrode knees applied and then sintered together with its surface. This results in There is also the advantage that the usual, very thin electrode sheets are used be. can, se that the material consumption remains low, the capacitor easily and the electrodes can be heated up. The sheets have z. B. a: Thick von werriger aJs i nim.

Claims (1)

PATENTANSPRUCH: Verfahren zu!r Vergrößerung der Oberfläche von Elektroden für Elektrol#tkondemat-oren, bei dem dar Elekürodenkern mit kleinen, vo,rzugsweise aus dernselten Metall wie dar Elektrüdenkeilm. bestehenden Metallte:ilchen badeckt ist, daduirch gekennz, eichnet, daß die Metallteilchen in suspendiertem Zustand auf den Elektrodenkern aufgeb-racht und #so,d-a-nn mit seiner Oberfläche zusammengesintert werden. Angezogene Dr#tickschrift#-n: Schweizerische Patentsuhrift Nr. 163 672; briti#mhe Patentschrift Nr. 396 453- PATENT CLAIM: Process for enlarging the surface area of electrodes for electrical condensers, in which the electrode core is made with small, preferably made of metal, such as the electrical wedge. Existing metal parts: if it is bathed, it is marked, that the metal particles are applied in a suspended state to the electrode core and so that they are sintered together with its surface. Drawn up fonts: Swiss Patent Watch No. 163 672; British Patent No. 396 453-
DEN2149D 1933-11-16 1934-11-06 Process for enlarging the surface of electrodes for electrolytic capacitors Expired DE943303C (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
BE943303X 1933-11-16

Publications (1)

Publication Number Publication Date
DE943303C true DE943303C (en) 1956-05-17

Family

ID=3888609

Family Applications (1)

Application Number Title Priority Date Filing Date
DEN2149D Expired DE943303C (en) 1933-11-16 1934-11-06 Process for enlarging the surface of electrodes for electrolytic capacitors

Country Status (1)

Country Link
DE (1) DE943303C (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE1225301B (en) * 1956-08-06 1966-09-22 Siemens Ag Process for the production of a tantalum electrode with an enlarged, effective surface for electrolytic capacitors

Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB396453A (en) * 1931-02-10 1933-08-10 Alexander Frederic Fekete Improvements in electrical insulators, electrical condensers and the like
CH163672A (en) * 1931-05-02 1933-08-31 Philips Nv Electrolytic capacitor.

Patent Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB396453A (en) * 1931-02-10 1933-08-10 Alexander Frederic Fekete Improvements in electrical insulators, electrical condensers and the like
CH163672A (en) * 1931-05-02 1933-08-31 Philips Nv Electrolytic capacitor.

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE1225301B (en) * 1956-08-06 1966-09-22 Siemens Ag Process for the production of a tantalum electrode with an enlarged, effective surface for electrolytic capacitors

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