GB1058477A - Improvements in/or relating to methods of manufacturing anodes for electrolytic capacitors - Google Patents
Improvements in/or relating to methods of manufacturing anodes for electrolytic capacitorsInfo
- Publication number
- GB1058477A GB1058477A GB2547964A GB2547964A GB1058477A GB 1058477 A GB1058477 A GB 1058477A GB 2547964 A GB2547964 A GB 2547964A GB 2547964 A GB2547964 A GB 2547964A GB 1058477 A GB1058477 A GB 1058477A
- Authority
- GB
- United Kingdom
- Prior art keywords
- anodized
- metal
- anodes
- sintering
- naphthalene
- 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
Links
- 239000003990 capacitor Substances 0.000 title abstract 2
- 238000004519 manufacturing process Methods 0.000 title 1
- 238000000034 method Methods 0.000 title 1
- 229910052751 metal Inorganic materials 0.000 abstract 5
- 239000002184 metal Substances 0.000 abstract 5
- UFWIBTONFRDIAS-UHFFFAOYSA-N Naphthalene Chemical compound C1=CC=CC2=CC=CC=C21 UFWIBTONFRDIAS-UHFFFAOYSA-N 0.000 abstract 4
- 239000000843 powder Substances 0.000 abstract 3
- 238000005245 sintering Methods 0.000 abstract 3
- 238000010438 heat treatment Methods 0.000 abstract 2
- AMWRITDGCCNYAT-UHFFFAOYSA-L hydroxy(oxo)manganese;manganese Chemical compound [Mn].O[Mn]=O.O[Mn]=O AMWRITDGCCNYAT-UHFFFAOYSA-L 0.000 abstract 2
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 abstract 1
- GRYLNZFGIOXLOG-UHFFFAOYSA-N Nitric acid Chemical compound O[N+]([O-])=O GRYLNZFGIOXLOG-UHFFFAOYSA-N 0.000 abstract 1
- IYABWNGZIDDRAK-UHFFFAOYSA-N allene Chemical compound C=C=C IYABWNGZIDDRAK-UHFFFAOYSA-N 0.000 abstract 1
- 238000007743 anodising Methods 0.000 abstract 1
- 239000007864 aqueous solution Substances 0.000 abstract 1
- 239000011248 coating agent Substances 0.000 abstract 1
- 238000000576 coating method Methods 0.000 abstract 1
- 229910002804 graphite Inorganic materials 0.000 abstract 1
- 239000010439 graphite Substances 0.000 abstract 1
- 238000005470 impregnation Methods 0.000 abstract 1
- MIVBAHRSNUNMPP-UHFFFAOYSA-N manganese(2+);dinitrate Chemical compound [Mn+2].[O-][N+]([O-])=O.[O-][N+]([O-])=O MIVBAHRSNUNMPP-UHFFFAOYSA-N 0.000 abstract 1
- 230000008018 melting Effects 0.000 abstract 1
- 238000002844 melting Methods 0.000 abstract 1
- 239000000203 mixture Substances 0.000 abstract 1
- 229910017604 nitric acid Inorganic materials 0.000 abstract 1
- IWZKICVEHNUQTL-UHFFFAOYSA-M potassium hydrogen phthalate Chemical compound [K+].OC(=O)C1=CC=CC=C1C([O-])=O IWZKICVEHNUQTL-UHFFFAOYSA-M 0.000 abstract 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
- B22F3/10—Sintering only
- B22F3/11—Making porous workpieces or articles
- B22F3/1121—Making porous workpieces or articles by using decomposable, meltable or sublimatable fillers
-
- 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
- B22F7/00—Manufacture of composite layers, workpieces, or articles, comprising metallic powder, by sintering the powder, with or without compacting wherein at least one part is obtained by sintering or compression
- B22F7/002—Manufacture of composite layers, workpieces, or articles, comprising metallic powder, by sintering the powder, with or without compacting wherein at least one part is obtained by sintering or compression of porous nature
- B22F7/004—Manufacture of composite layers, workpieces, or articles, comprising metallic powder, by sintering the powder, with or without compacting wherein at least one part is obtained by sintering or compression of porous nature comprising at least one non-porous part
Landscapes
- Engineering & Computer Science (AREA)
- Manufacturing & Machinery (AREA)
- Mechanical Engineering (AREA)
- Power Engineering (AREA)
- Chemical & Material Sciences (AREA)
- Composite Materials (AREA)
- Materials Engineering (AREA)
- Microelectronics & Electronic Packaging (AREA)
- Powder Metallurgy (AREA)
- Fixed Capacitors And Capacitor Manufacturing Machines (AREA)
Abstract
An anode for an electrolytic capacitor is made by compacting a mixture of a powder metal, e.g. Ta or Al, and naphthalene around a metallic wire core, heating to expel the naphthalene and then sintering the metal powder. The metal powder which may be 50 micron size Ta or 20 micron size Al may have an anodized oxide layer. Sintering is effected in vacuum at 650 DEG -659 DEG C. for Al and at 1900 DEG C. for Ta. A final sintering for a very short time at the melting temperature of the metal may then be carried out. The sintered anodes are then anodized. The core wires may be Al or Ta and the sintered anodes may be impregnated with manganese nitrate which is decomposed to manganese oxide by heating. The impregnated anodes may then again be anodized and the impregnation and anodizing may be repeated another three times. A graphite coating may then be applied and finally a metal layer. The Ta is anodized in 0.01% HNO3 for 20 hours and the Al is anodized in an aqueous solution of 2.5% by weight of potassium acid phthalate at 21 volts.
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| NL294447 | 1963-06-21 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| GB1058477A true GB1058477A (en) | 1967-02-08 |
Family
ID=19754809
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| GB2547964A Expired GB1058477A (en) | 1963-06-21 | 1964-06-19 | Improvements in/or relating to methods of manufacturing anodes for electrolytic capacitors |
Country Status (6)
| Country | Link |
|---|---|
| AT (1) | AT249191B (en) |
| CH (1) | CH458540A (en) |
| DE (1) | DE1198936B (en) |
| DK (1) | DK112600B (en) |
| ES (1) | ES301213A1 (en) |
| GB (1) | GB1058477A (en) |
-
1964
- 1964-06-18 CH CH797164A patent/CH458540A/en unknown
- 1964-06-18 AT AT522764A patent/AT249191B/en active
- 1964-06-18 DK DK307764A patent/DK112600B/en unknown
- 1964-06-18 DE DEN25134A patent/DE1198936B/en active Pending
- 1964-06-19 ES ES0301213A patent/ES301213A1/en not_active Expired
- 1964-06-19 GB GB2547964A patent/GB1058477A/en not_active Expired
Also Published As
| Publication number | Publication date |
|---|---|
| ES301213A1 (en) | 1965-01-16 |
| AT249191B (en) | 1966-09-12 |
| DK112600B (en) | 1968-12-30 |
| DE1198936B (en) | 1965-08-19 |
| CH458540A (en) | 1968-06-30 |
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