DE1105991B - Process for the production of porous sintered electrodes - Google Patents
Process for the production of porous sintered electrodesInfo
- Publication number
- DE1105991B DE1105991B DES31639A DES0031639A DE1105991B DE 1105991 B DE1105991 B DE 1105991B DE S31639 A DES31639 A DE S31639A DE S0031639 A DES0031639 A DE S0031639A DE 1105991 B DE1105991 B DE 1105991B
- Authority
- DE
- Germany
- Prior art keywords
- metal
- sintered body
- production
- porous sintered
- valve metal
- 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
- 238000000034 method Methods 0.000 title claims description 14
- 238000004519 manufacturing process Methods 0.000 title claims description 6
- 229910052751 metal Inorganic materials 0.000 claims description 34
- 239000002184 metal Substances 0.000 claims description 34
- 238000000576 coating method Methods 0.000 claims description 9
- 239000011248 coating agent Substances 0.000 claims description 8
- 239000003990 capacitor Substances 0.000 claims description 6
- 239000000843 powder Substances 0.000 claims description 4
- 229910052715 tantalum Inorganic materials 0.000 claims description 3
- GUVRBAGPIYLISA-UHFFFAOYSA-N tantalum atom Chemical compound [Ta] GUVRBAGPIYLISA-UHFFFAOYSA-N 0.000 claims description 3
- 238000005979 thermal decomposition reaction Methods 0.000 claims description 3
- OEIMLTQPLAGXMX-UHFFFAOYSA-I tantalum(v) chloride Chemical compound Cl[Ta](Cl)(Cl)(Cl)Cl OEIMLTQPLAGXMX-UHFFFAOYSA-I 0.000 claims description 2
- 239000002245 particle Substances 0.000 description 7
- 229910052782 aluminium Inorganic materials 0.000 description 6
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 description 6
- 239000010410 layer Substances 0.000 description 5
- 150000001875 compounds Chemical class 0.000 description 4
- 238000005245 sintering Methods 0.000 description 3
- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 description 2
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 description 2
- 229910052802 copper Inorganic materials 0.000 description 2
- 239000010949 copper Substances 0.000 description 2
- 230000008020 evaporation Effects 0.000 description 2
- 238000001704 evaporation Methods 0.000 description 2
- 238000010438 heat treatment Methods 0.000 description 2
- 150000002739 metals Chemical class 0.000 description 2
- 238000003825 pressing Methods 0.000 description 2
- 239000011324 bead Substances 0.000 description 1
- 239000003245 coal Substances 0.000 description 1
- 239000002131 composite material Substances 0.000 description 1
- 238000000151 deposition Methods 0.000 description 1
- 230000008021 deposition Effects 0.000 description 1
- 230000006698 induction Effects 0.000 description 1
- 239000011810 insulating material Substances 0.000 description 1
- 229910052742 iron Inorganic materials 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 230000008018 melting Effects 0.000 description 1
- 238000002844 melting Methods 0.000 description 1
- 238000007747 plating Methods 0.000 description 1
- 239000011819 refractory material Substances 0.000 description 1
- 239000002904 solvent Substances 0.000 description 1
- 238000004544 sputter deposition Methods 0.000 description 1
- 239000002344 surface layer Substances 0.000 description 1
Classifications
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01G—CAPACITORS; CAPACITORS, RECTIFIERS, DETECTORS, SWITCHING DEVICES, LIGHT-SENSITIVE OR TEMPERATURE-SENSITIVE DEVICES OF THE ELECTROLYTIC TYPE
- H01G9/00—Electrolytic capacitors, rectifiers, detectors, switching devices, light-sensitive or temperature-sensitive devices; Processes of their manufacture
- H01G9/004—Details
- H01G9/04—Electrodes or formation of dielectric layers thereon
- H01G9/048—Electrodes or formation of dielectric layers thereon characterised by their structure
- H01G9/052—Sintered electrodes
Landscapes
- Engineering & Computer Science (AREA)
- Power Engineering (AREA)
- Microelectronics & Electronic Packaging (AREA)
- Electrolytic Production Of Metals (AREA)
- Powder Metallurgy (AREA)
Description
DEUTSCHESGERMAN
Die Erfindung bezieht sich auf ein Verfahren zur Herstellung von porösen Sinterelektroden für elektrolytische Kondensatoren.The invention relates to a method for producing porous sintered electrodes for electrolytic Capacitors.
Es ist bereits bekannt, Körper hoher Porosität als Anoden für elektrolytische Kondensatoren zu verwenden. Solche Körper werden dadurch hergestellt, daß man das körnige oder pulverförmige Ventilmetall in geeignete Formen preßt und einem Sintervorgang unterwirft, um die einzelnen Teilchen in elektrischen Kontakt miteinander zu bringen. Die Herstellung von solchen Sinterkörpern stößt jedoch bei manchen Ventilmetallen auf große Schwierigkeiten, wenn, wie z. B. bei Aluminium, der Erweichungspunkt und Schmelzpunkt nahe beieinanderliegen. Noch größere Schwierigkeiten bereitet die Herstellung von Sinterkörpern aus schwer schmelzbaren Metallen, wie z. B. Tantal. Dieses Metall ist außerdem ziemlich teuer. Zur Herstellung der dielektrischen Schicht wird jedoch nur eine dünne Oberflächenschicht des Metalls benötigt. Es wurde deshalb schon versucht, die Elektroden für elektrolytische Kondensatoren aus einem anderen Metall oder Stoff, wie z. B. Kohle oder Kupfer, herzustellen und diese mit einem dünnen Überzug des Ventilmetalls zu versehen. Bekannt ist auch eine Elektrode aus zusammengesetzten Isoliermaterialkügelchen, deren Oberflächen mit einer leitenden Metallschicht bedeckt sind. Den Überzug aus Ventilmetall hat man z. B. durch galvanische Abscheidung, Kathodenzerstäubung oder durch Plattieren auf die einzelnen Isolierkörper aufgebracht.It is already known to be high porosity bodies To use anodes for electrolytic capacitors. Such bodies are made by the granular or powdery valve metal is pressed into suitable shapes and a sintering process subject to bring the individual particles into electrical contact with each other. The manufacture of However, such sintered bodies encountered great difficulties in some valve metals when, such. B. in the case of aluminum, the softening point and melting point are close to one another. Bigger trouble prepares the production of sintered bodies from difficult-to-melt metals, such as B. tantalum. This metal is also quite expensive. To produce the dielectric layer, however, only requires a thin surface layer of the metal. Attempts have therefore already been made to use the electrodes for electrolytic capacitors made of a different metal or material, such as. B. coal or copper and to provide them with a thin coating of the valve metal. An electrode is also known of composite insulating material beads, whose Surfaces are covered with a conductive metal layer. The cover made of valve metal has z. B. by galvanic deposition, cathode sputtering or by plating on the individual insulating bodies upset.
Durch die Erfindung wird nun ein Verfahren angegeben, nach dem man poröse Sinterelektroden für elektrolytische Kondensatoren dadurch herstellen kann, daß ein Sinterkörper aus- einem Metallpulver als Träger mit einem dünnen Überzug aus Ventilmetall versehen wird.The invention now provides a method according to which porous sintered electrodes for Can produce electrolytic capacitors that a sintered body made of a metal powder as a carrier is provided with a thin coating of valve metal.
Die Erfindung soll an Hand der Figuren erläutert werden.The invention is to be explained with reference to the figures.
Fig. 1 zeigt schematisch einen gemäß der Erfindung erhaltenen Sinterkörper, bei dem zunächst kleine Körper oder Pulverteilchen aus dem Trägermetall mit einem Überzug aus Ventilmetall versehen und diese anschließend einem Preß- und/oder Sintervorgang unterworfen werden, während1 shows schematically a sintered body obtained according to the invention, in which initially small bodies or powder particles from the carrier metal provided with a coating of valve metal and this then subjected to a pressing and / or sintering process while
Fig. 2 zur Erläuterung einer anderen Durchführung des Verfahrens gemäß der Erfindung dient, bei dem zunächst ein poröser Sinterkörper aus dem Trägermetall hergestellt und auf diesen, vorzugsweise durch thermische Zersetzung einer entsprechenden chemischen Verbindung, das Ventilmetall niedergeschlagen wird.Fig. 2 is used to explain another implementation of the method according to the invention, in which first made a porous sintered body from the carrier metal and on this, preferably by thermal decomposition of a corresponding chemical compound, the valve metal is deposited will.
Man kann z. B. kleine Teilchen, insbesondere Pulverteilchen, aus Eisen, Kupfer oder einem anderen geeigneten Metall nach den bekannten Verfahren mitYou can z. B. small particles, especially powder particles, of iron, copper or another suitable Metal according to the known method with
Verfahren zur Herstellung
von porösen SinterelektrodenMethod of manufacture
of porous sintered electrodes
Anmelder:Applicant:
Standard Elektrik LorenzStandard electrical system Lorenz
Aktiengesellschaft,Corporation,
Stuttgart-Zuffenhausen,Stuttgart-Zuffenhausen,
Helhnuth-Hirth-Str. 42Helhnuth-Hirth-Str. 42
Dr.-Ing. Carl Heck und Dr.-Ing. Joachim Weber,Dr.-Ing. Carl Heck and Dr.-Ing. Joachim Weber,
Nürnberg,
sind als Erfinder genannt wordenNuremberg,
have been named as inventors
einer dünnen Schicht eines Ventilmetalls, wie z. B. Aluminium, Tantal usw., überziehen. Diese Teilchen werden dann in bekannter Weise zu einem Körper verpreßt und einem Sintervorgang unterworfen. Dabei verschweißen sich die oberflächlichen Ventilmetallschichten zu einem einheitlichen Gebilde. Eine solche Anordnung ist in Fig. 1 beispielsweise dargestellt. Die Teilchen 1 des Trägermetalls tragen Überzüge 2 aus Ventilmetall, die an den Berührungsstellen, die mit 3 bezeichnet sind, miteinander verschweißt sind. Bei Aluminium als Ventilmetall hat dieses Verfahren den großen Vorteil, daß die dünnen Aluminiumschichten allein durch den Preßdruck zum Verschweißen gebracht werden können. Da das Trägermetall 1 aus einem Metall größerer Festigkeit besteht, können sich die einzelnen Körnchen bei dem notwendigen Preßdruck selbst nicht verformen, was der Fall wäre, wenn diese ganz aus Aluminium bestehen wurden. Die Folge wäre, daß sich das Aluminium vollkommen verformen und kein Körper hoher Porosität entstehen würde.a thin layer of valve metal, e.g. B. aluminum, tantalum, etc., coat. These particles are then pressed into a body in a known manner and subjected to a sintering process. Included The surface valve metal layers weld to form a uniform structure. Such Arrangement is shown in Fig. 1, for example. The particles 1 of the carrier metal carry out coatings 2 Valve metal, which are welded to one another at the contact points, which are designated by 3. at Aluminum as valve metal, this process has the great advantage that the thin aluminum layers can be made to weld by the pressure alone. Since the carrier metal 1 from If a metal of greater strength is made, the individual grains can move together with the necessary pressing pressure do not deform themselves, which would be the case if these were made entirely of aluminum. the The consequence would be that the aluminum would deform completely and no body of high porosity would arise would.
Nach der anderen Ausführbarkeit der Erfindung werden die Teilchen des Trägermetalls zuerst zu einem Körper verpreßt und einer Sinterung unterworfen und dann auf geeignete Weise mit einem dünnen Überzug aus Ventilmetall versehen. Dies geschieht vorzugszugsweise dadurch, daß der Sinterkörper auf geeignete Weise durch Hochfrequenzheizung erhitzt wird und eine chemische Verbindung des Ventilmetalls in Gasoder Dampfform über den Sinterkörper geleitet wird. Bei genügend hoher Temperatur des Sinterkörpers schlägt sich infolge der thermischen Zersetzung dasAccording to the other practicability of the invention, the particles of the carrier metal first become one Body pressed and sintered and then suitably coated with a thin coating made of valve metal. This is preferably done in that the sintered body on suitable Way is heated by high frequency heating and a chemical compound of the valve metal in gas or Steam form is passed over the sintered body. If the temperature of the sintered body is high enough This is not the case as a result of thermal decomposition
109 579/335109 579/335
Ventilmetall gleichmäßig auf dem Trägermetall nieder. In Fig. 2 ist eine solche Anordnung schematisch dargestellt. Der Sinterkörper 4 befindet sich in einem Rohr 5 aus feuerfestem Material und wird durch, die Induktionsspule 6 erhitzt. Gleichzeitig wird, wie angedeutet, ein Gas- oder Dampfstrom, z. B. Tantalchlorid, über den Sinterkörper geleitet. Um zu erreichen, daß der Gas- oder Dampfstrom in sämtliche Hohlräume des Sinterkorpers gelangt, kann man das Rohr so eng machen, daß der Sinterkörper gerade hineinpaßt, und den Gas- oder Dampfstrom unter Druck durch den Sinterkörper pressen. Das Verfahren läßt sich jedoch auch so ausführen, daß man den Sinterkörper mit einer Lösung oder Schmelze einer chemischen Verbindung des Überzugsmetalls tränkt und nach Verdunsten oder Verdampfen des Lösungsmittels die Verbindung durch Erhitzen des Sinterkorpers thermisch zersetzt.Valve metal evenly down on the carrier metal. Such an arrangement is shown schematically in FIG shown. The sintered body 4 is located in a tube 5 made of refractory material and is through which Induction coil 6 heated. At the same time, as indicated, a gas or steam stream, z. B. tantalum chloride, passed over the sintered body. To achieve that the gas or steam flow in all Cavities of the sintered body reaches, you can make the tube so narrow that the sintered body fits right into it, and forcing the gas or vapor stream under pressure through the sintered body. The procedure leaves However, they can also be carried out in such a way that the sintered body is treated with a solution or melt of a chemical Compound of the coating metal soaks and after evaporation or evaporation of the solvent the compound is thermally decomposed by heating the sintered body.
Durch diese Verfahren gelingt es, hochporöse Körper herzustellen, welche aus einem Trägermetall und einem darauf befindlichen Überzug aus Ventilmetall bestehen, die sich zur Verwendung in elektrolytischen Kondensatoren eignen.This process makes it possible to produce highly porous bodies, which are made of a carrier metal and a coating thereon made of valve metal, which is suitable for use in electrolytic Capacitors are suitable.
Claims (3)
213128, 2 283 723, 2290338, 2299228, 2 359970, 406 345, 2 578 667, 2 604 517.U.S. Patent Nos. 2,198,253, 2,211,583, ·
213128, 2 283 723, 2290338, 2299228, 2 359970, 406 345, 2 578 667, 2 604 517.
Priority Applications (3)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| DES31639A DE1105991B (en) | 1952-12-24 | 1952-12-24 | Process for the production of porous sintered electrodes |
| GB3009453A GB742379A (en) | 1952-12-24 | 1953-10-30 | Method of making sintered electrodes for electrolytic condensers |
| CH329543D CH329543A (en) | 1952-12-24 | 1953-12-21 | Process for the production of porous sintered electrodes for electrolytic capacitors |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| DES31639A DE1105991B (en) | 1952-12-24 | 1952-12-24 | Process for the production of porous sintered electrodes |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| DE1105991B true DE1105991B (en) | 1961-05-04 |
Family
ID=7480595
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| DES31639A Pending DE1105991B (en) | 1952-12-24 | 1952-12-24 | Process for the production of porous sintered electrodes |
Country Status (3)
| Country | Link |
|---|---|
| CH (1) | CH329543A (en) |
| DE (1) | DE1105991B (en) |
| GB (1) | GB742379A (en) |
Families Citing this family (3)
| 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 |
| DE1108811B (en) * | 1958-04-02 | 1961-06-15 | Western Electric Co | Method of manufacturing a tantalum electrolytic capacitor |
| DE1564822B2 (en) * | 1966-11-16 | 1970-11-19 | Standard Elektrik Lorenz Ag, 7000 Stuttgart | Process for the production of electrical capacitors with a semiconductor layer |
Citations (11)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US2198253A (en) * | 1936-06-15 | 1940-04-23 | Gen Motors Corp | Method of making composite metal bearing elements |
| US2211583A (en) * | 1939-12-13 | 1940-08-13 | Ruben Samuel | Method of making electric condensers and condensers made thereby |
| US2213128A (en) * | 1935-02-14 | 1940-08-27 | Accumulatoren Fabrik Ag | Alkaline storage battery |
| US2283723A (en) * | 1939-06-13 | 1942-05-19 | Magnavox Company Inc | Porous electrode electrolytic condenser |
| US2290338A (en) * | 1941-02-28 | 1942-07-21 | Gen Motors Corp | Method of manufacture |
| US2299228A (en) * | 1938-01-12 | 1942-10-20 | Radio Patents Corp | Electric condenser |
| US2359970A (en) * | 1937-10-14 | 1944-10-10 | Magnavox Co | Porous condenser electrode |
| US2406345A (en) * | 1942-04-15 | 1946-08-27 | Joseph B Brennan | Electrode and method of making same |
| US2578667A (en) * | 1946-09-25 | 1951-12-18 | Everett D Mccurdy | Electrode for electrolytic condensers |
| US2604517A (en) * | 1947-04-23 | 1952-07-22 | Everett D Mccurdy | Electrode and terminal assembly for electrolytic devices and methods of making same |
| DE859338C (en) * | 1945-05-04 | 1952-12-15 | Joseph Barry Brennan | Electrode, plate or the like with connecting element and electrolytic capacitor |
-
1952
- 1952-12-24 DE DES31639A patent/DE1105991B/en active Pending
-
1953
- 1953-10-30 GB GB3009453A patent/GB742379A/en not_active Expired
- 1953-12-21 CH CH329543D patent/CH329543A/en unknown
Patent Citations (11)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US2213128A (en) * | 1935-02-14 | 1940-08-27 | Accumulatoren Fabrik Ag | Alkaline storage battery |
| US2198253A (en) * | 1936-06-15 | 1940-04-23 | Gen Motors Corp | Method of making composite metal bearing elements |
| US2359970A (en) * | 1937-10-14 | 1944-10-10 | Magnavox Co | Porous condenser electrode |
| US2299228A (en) * | 1938-01-12 | 1942-10-20 | Radio Patents Corp | Electric condenser |
| US2283723A (en) * | 1939-06-13 | 1942-05-19 | Magnavox Company Inc | Porous electrode electrolytic condenser |
| US2211583A (en) * | 1939-12-13 | 1940-08-13 | Ruben Samuel | Method of making electric condensers and condensers made thereby |
| US2290338A (en) * | 1941-02-28 | 1942-07-21 | Gen Motors Corp | Method of manufacture |
| US2406345A (en) * | 1942-04-15 | 1946-08-27 | Joseph B Brennan | Electrode and method of making same |
| DE859338C (en) * | 1945-05-04 | 1952-12-15 | Joseph Barry Brennan | Electrode, plate or the like with connecting element and electrolytic capacitor |
| US2578667A (en) * | 1946-09-25 | 1951-12-18 | Everett D Mccurdy | Electrode for electrolytic condensers |
| US2604517A (en) * | 1947-04-23 | 1952-07-22 | Everett D Mccurdy | Electrode and terminal assembly for electrolytic devices and methods of making same |
Also Published As
| Publication number | Publication date |
|---|---|
| CH329543A (en) | 1958-04-30 |
| GB742379A (en) | 1955-12-21 |
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