DE2700224A1 - Sintered tantalum anode for capacitors - where anode is tempered before applying manganese salt, so improved electric properties are obtd. - Google Patents
Sintered tantalum anode for capacitors - where anode is tempered before applying manganese salt, so improved electric properties are obtd.Info
- Publication number
- DE2700224A1 DE2700224A1 DE19772700224 DE2700224A DE2700224A1 DE 2700224 A1 DE2700224 A1 DE 2700224A1 DE 19772700224 DE19772700224 DE 19772700224 DE 2700224 A DE2700224 A DE 2700224A DE 2700224 A1 DE2700224 A1 DE 2700224A1
- Authority
- DE
- Germany
- Prior art keywords
- anode
- electric properties
- obtd
- capacitors
- sintered
- 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
- GUVRBAGPIYLISA-UHFFFAOYSA-N tantalum atom Chemical compound [Ta] GUVRBAGPIYLISA-UHFFFAOYSA-N 0.000 title claims abstract description 12
- 229910052715 tantalum Inorganic materials 0.000 title claims abstract description 10
- 239000003990 capacitor Substances 0.000 title abstract description 7
- 150000002696 manganese Chemical class 0.000 title 1
- 238000000034 method Methods 0.000 claims abstract description 13
- 238000005496 tempering Methods 0.000 claims abstract description 10
- 229910052751 metal Inorganic materials 0.000 claims abstract description 4
- 239000002184 metal Substances 0.000 claims abstract description 4
- 238000004519 manufacturing process Methods 0.000 claims description 4
- 238000000197 pyrolysis Methods 0.000 claims description 4
- 230000015572 biosynthetic process Effects 0.000 claims description 3
- NUJOXMJBOLGQSY-UHFFFAOYSA-N manganese dioxide Chemical compound O=[Mn]=O NUJOXMJBOLGQSY-UHFFFAOYSA-N 0.000 description 4
- 239000007784 solid electrolyte Substances 0.000 description 3
- BQCADISMDOOEFD-UHFFFAOYSA-N Silver Chemical compound [Ag] BQCADISMDOOEFD-UHFFFAOYSA-N 0.000 description 2
- 239000007788 liquid Substances 0.000 description 2
- BPUBBGLMJRNUCC-UHFFFAOYSA-N oxygen(2-);tantalum(5+) Chemical compound [O-2].[O-2].[O-2].[O-2].[O-2].[Ta+5].[Ta+5] BPUBBGLMJRNUCC-UHFFFAOYSA-N 0.000 description 2
- 239000011148 porous material Substances 0.000 description 2
- 229910052709 silver Inorganic materials 0.000 description 2
- 239000004332 silver Substances 0.000 description 2
- PBCFLUZVCVVTBY-UHFFFAOYSA-N tantalum pentoxide Inorganic materials O=[Ta](=O)O[Ta](=O)=O PBCFLUZVCVVTBY-UHFFFAOYSA-N 0.000 description 2
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 description 1
- 230000002349 favourable effect Effects 0.000 description 1
- 229910002804 graphite Inorganic materials 0.000 description 1
- 239000010439 graphite Substances 0.000 description 1
- 239000000843 powder Substances 0.000 description 1
- 239000012266 salt solution Substances 0.000 description 1
- 229910000679 solder Inorganic materials 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
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B22—CASTING; POWDER METALLURGY
- B22F—WORKING METALLIC POWDER; MANUFACTURE OF ARTICLES FROM METALLIC POWDER; MAKING METALLIC POWDER; APPARATUS OR DEVICES SPECIALLY ADAPTED FOR METALLIC POWDER
- B22F3/00—Manufacture of workpieces or articles from metallic powder characterised by the manner of compacting or sintering; Apparatus specially adapted therefor ; Presses and furnaces
- B22F3/24—After-treatment of workpieces or articles
-
- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22C—ALLOYS
- C22C1/00—Making non-ferrous alloys
- C22C1/04—Making non-ferrous alloys by powder metallurgy
- C22C1/045—Alloys based on refractory metals
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01G—CAPACITORS; CAPACITORS, RECTIFIERS, DETECTORS, SWITCHING DEVICES, LIGHT-SENSITIVE OR TEMPERATURE-SENSITIVE DEVICES OF THE ELECTROLYTIC TYPE
- H01G4/00—Fixed capacitors; Processes of their manufacture
- H01G4/002—Details
- H01G4/018—Dielectrics
- H01G4/06—Solid dielectrics
- H01G4/08—Inorganic dielectrics
- H01G4/12—Ceramic dielectrics
- H01G4/1209—Ceramic dielectrics characterised by the ceramic dielectric material
- H01G4/1254—Ceramic dielectrics characterised by the ceramic dielectric material based on niobium or tungsteen, tantalum oxides or niobates, tantalates
Landscapes
- Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Power Engineering (AREA)
- Ceramic Engineering (AREA)
- Manufacturing & Machinery (AREA)
- Microelectronics & Electronic Packaging (AREA)
- Mechanical Engineering (AREA)
- Inorganic Chemistry (AREA)
- Materials Engineering (AREA)
- Metallurgy (AREA)
- Organic Chemistry (AREA)
- Fixed Capacitors And Capacitor Manufacturing Machines (AREA)
Abstract
Description
Verfahren zur Herstellung von Sinterkörpern aus einem Ventil-Process for the production of sintered bodies from a valve
metall Die Erfindung betrifft ein Verfahren zur Herstellung von Sinterkörpern aus einem Ventilmetall, insbesondere von formierten Tantalsinterkörpern.metal The invention relates to a method for producing sintered bodies made of a valve metal, in particular formed sintered tantalum bodies.
Es ist bekannt, beispielsweise bei der Herstellumg von Tantalkondensatoren, auf der Tantaloberfläche sowohl außen als auch in den Poren durch einen clektrochemischen Formierprozeß Tantalpentoxid als Dielektrikum und anschließend Mangandioxid als Kathode in Form eines festen Elektrolyten durch einen Fyrolyseprozeß auf dem mit flüssiger Hangansalzlösung imprägnierten Sinterkörper zu erzeugen.It is known, for example in the manufacture of tantalum capacitors, on the tantalum surface both outside and in the pores by a clektrochemical Forming process tantalum pentoxide as dielectric and then manganese dioxide as Cathode in the form of a solid electrolyte through a pyrolysis process on the with Liquid Hangansalzlösung to produce impregnated sintered bodies.
Der Erfindung liegt die Aufgabe zugrunde, bei derartigen Sinterkörpern die elenrtrischen Eigenschaften weiter zu verbessern.The invention is based on the object of such sintered bodies to further improve the electrical properties.
Diese Aufgabe wird erfindungsgemaß dadurch gelöst, daß die Sinterkörper nach der Formierung einer Temperung unterzogen werden.This object is achieved according to the invention in that the sintered bodies be subjected to tempering after forming.
Die mit der Erfindung erzielten Vorteile bestehen insbesondere darin, daß die elektrischen Eigenschaften, irsbesondere die Reststromwerte wesentlich verbessert werden. Diese Verbesserung bewirkt sowohl eine längere Leben(dauer bei stabilen elektrischen Werten als auch günstigere Eigenschaften bei Gegenspannung sowie eine geringere Spannungsabhängigkeit desReststroms. Weiterhin wird durch die Temperung der formiert n £interkörper bei zuaindest gleichbleibenden elektrischen Eigenschaften der fertigen Kondensatoren die Formierzeit wesentlich verkürzt.The advantages achieved with the invention are in particular: that the electrical properties, in particular the residual current values, are significantly improved will. This improvement causes both a longer life (duration with stable electrical values as well as more favorable properties in the case of counter voltage as well as a lower voltage dependency of the residual current. Furthermore, the tempering it forms an internal body with at least the same electrical properties of the finished capacitors significantly shortens the forming time.
Weitere Einzelheiten und Vorteile des erfindungsgemäßen Verfahren: werden im folgenden anhand der Bertigung eines Tantalkondensators näher erläutert.Further details and advantages of the method according to the invention: are explained in more detail below with reference to a tantalum capacitor.
Ein Tantalkoadensator besteht zumeist aus einem zylindrischen Körper aus reinem Taiftalpulver als Anode, der um einen Tantal -draht gepreßt und anschließend bei hohen Temperaturen unter Vakium gesintert wird. Auf der Tantaloberfläche wird sowohl außen als auch in den Poren durch einen elektrochemischen Formierprozeß Tantalpentoxid als Dielektrikum erzeugt, dessen Dicke von der Formierspannung abhängig ist.A tantalum capacitor usually consists of a cylindrical body made of pure Taiftal powder as an anode, which is pressed around a tantalum wire and then is sintered at high temperatures under vacuum. On the tantalum surface is both outside and in the pores by means of an electrochemical forming process tantalum pentoxide generated as a dielectric, the thickness of which depends on the forming voltage.
Nach dem Formierprozeß wirl vorgeschlagen, die Sinterkörper einer Temperung zu unterziehen, die vorzugsweise bei der Temperatur des nachfolgenden Pyrolyseprozesses erfolgt. Mit dieser Maßnahme werden die elektrischen Eigenschaften, insbesondere die Reststromwerte wesentlich verbessert. Diese ferbesserung bewirkt sowohl eine längere Lebensdauer bei stabilen elektrischen Werten als auch günstigere Eigenschaften bei Gegenspannung sowie eine geringere Spannungsabhängigkeit des Reststroms. Weiterhin läßt sich durch diese Temperung der formierten Sinterkörper bei zumindest gleichbleibenden elektrischen Eigenschaften der fertigen Kondensatoren die Formierzeit wesentlich verkürzen. Diese Temperung kann bei Bedarf auch vor den Formierprozeß erfolgen.After the forming process we proposed the sintered body a To undergo tempering, preferably at the temperature of the subsequent Pyrolysis process takes place. With this measure the electrical properties, in particular, the residual current values are significantly improved. This causes improvement both a longer service life with stable electrical values and cheaper ones Counter-voltage properties as well as a lower voltage dependency of the residual current. Furthermore, this tempering of the formed sintered bodies can be at least constant electrical properties of the finished capacitors reduce the formation time shorten significantly. If necessary, this tempering can also take place before the forming process take place.
Als Kathode dient Mangandioxid als fester Elektrolyt, der durch einen Pyrolyseprozeß auf dem mit flüssiger Nangansalzlösung imprägnierten Sinterkörper erzeugt wird. Die Stromzuführung erfolgt über eine Graphit- und Leitsilberschicht, die auf dem festen Elektrolyt aufgebracht werden, wobei die Leitsilberschicht als Lötunterlage für den Kathodenanschluß dient. An den nicht lötbaren Tantaldaht der Anode wird ein lötbarer Anschlufidraht angeschweißt.Manganese dioxide serves as the cathode as a solid electrolyte, which is Pyrolysis process on the sintered body impregnated with liquid nanganese salt solution is produced. The power is supplied via a graphite and conductive silver layer, which are applied to the solid electrolyte, the conductive silver layer as Solder pad is used for the cathode connection. On the non-solderable tantalum wire of the A solderable connection wire is welded to the anode.
Claims (3)
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| DE19772700224 DE2700224A1 (en) | 1977-01-05 | 1977-01-05 | Sintered tantalum anode for capacitors - where anode is tempered before applying manganese salt, so improved electric properties are obtd. |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| DE19772700224 DE2700224A1 (en) | 1977-01-05 | 1977-01-05 | Sintered tantalum anode for capacitors - where anode is tempered before applying manganese salt, so improved electric properties are obtd. |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| DE2700224A1 true DE2700224A1 (en) | 1978-07-13 |
Family
ID=5998136
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| DE19772700224 Pending DE2700224A1 (en) | 1977-01-05 | 1977-01-05 | Sintered tantalum anode for capacitors - where anode is tempered before applying manganese salt, so improved electric properties are obtd. |
Country Status (1)
| Country | Link |
|---|---|
| DE (1) | DE2700224A1 (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP0166205A1 (en) * | 1984-05-22 | 1986-01-02 | Nec Corporation | Method of producing electrolytic capacitor with Al-Ti anode body |
-
1977
- 1977-01-05 DE DE19772700224 patent/DE2700224A1/en active Pending
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP0166205A1 (en) * | 1984-05-22 | 1986-01-02 | Nec Corporation | Method of producing electrolytic capacitor with Al-Ti anode body |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| OHJ | Non-payment of the annual fee |