GB966284A - Electrical capacitors - Google Patents
Electrical capacitorsInfo
- Publication number
- GB966284A GB966284A GB431263A GB431263A GB966284A GB 966284 A GB966284 A GB 966284A GB 431263 A GB431263 A GB 431263A GB 431263 A GB431263 A GB 431263A GB 966284 A GB966284 A GB 966284A
- Authority
- GB
- United Kingdom
- Prior art keywords
- aluminium
- porous
- anodic
- film
- anodizing
- 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 3
- 239000004411 aluminium Substances 0.000 abstract 4
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 abstract 4
- 229910052782 aluminium Inorganic materials 0.000 abstract 4
- 239000002253 acid Substances 0.000 abstract 3
- 238000007743 anodising Methods 0.000 abstract 2
- 239000011888 foil Substances 0.000 abstract 2
- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 abstract 1
- 239000002202 Polyethylene glycol Substances 0.000 abstract 1
- BQCADISMDOOEFD-UHFFFAOYSA-N Silver Chemical compound [Ag] BQCADISMDOOEFD-UHFFFAOYSA-N 0.000 abstract 1
- 239000000654 additive Substances 0.000 abstract 1
- 239000010407 anodic oxide Substances 0.000 abstract 1
- 239000011248 coating agent Substances 0.000 abstract 1
- 238000000576 coating method Methods 0.000 abstract 1
- 229910052802 copper Inorganic materials 0.000 abstract 1
- 239000010949 copper Substances 0.000 abstract 1
- 239000007788 liquid Substances 0.000 abstract 1
- 239000000463 material Substances 0.000 abstract 1
- 229920001223 polyethylene glycol Polymers 0.000 abstract 1
- 239000004065 semiconductor Substances 0.000 abstract 1
- 229910052709 silver Inorganic materials 0.000 abstract 1
- 239000004332 silver Substances 0.000 abstract 1
- 150000005846 sugar alcohols Polymers 0.000 abstract 1
- 229910052715 tantalum Inorganic materials 0.000 abstract 1
- GUVRBAGPIYLISA-UHFFFAOYSA-N tantalum atom Chemical compound [Ta] GUVRBAGPIYLISA-UHFFFAOYSA-N 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
- H01G9/022—Electrolytes; Absorbents
Landscapes
- Engineering & Computer Science (AREA)
- Power Engineering (AREA)
- Chemical & Material Sciences (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Electrochemistry (AREA)
- Microelectronics & Electronic Packaging (AREA)
- Electric Double-Layer Capacitors Or The Like (AREA)
Abstract
At least one of the aluminium electrodes of an electrolytic capacitor has a first, dense, anodic oxide layer overlying its surface with a second porous anodic dielectric layer overlying the first and impregnated with a semi-conducting material having a resistivity between 5 x 105 and 3 x 107 ohm/cm. The double coating may be applied to one or more usually both aluminium electrode foils, and is formed by first anodizing the aluminium in a relatively strong acid e.g. oxalic, phosphoric, chromic or sulphuric in which the anodic film is somewhat soluble, so that a porous film is deposited, then anodizing in a weak acid such as boric to build up the dense film underneath the porous one. The Specification lists suitable semi-conducting liquids which may be used for impregnating the porous oxide; these include various polyhydric alcohols, sometimes with acid additives to affect the resistivity characteristics, and it is also possible to use hot polyethylene glycol which solidifies at room temperature. The completed capacitors may be of the wound form using two foils treated as described, or one such electrode may be held as an anode within a container of silver, copper, tantalum, aluminium, lead or other suitable material acting as cathode.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| GB431263A GB966284A (en) | 1963-02-01 | 1963-02-01 | Electrical capacitors |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| GB431263A GB966284A (en) | 1963-02-01 | 1963-02-01 | Electrical capacitors |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| GB966284A true GB966284A (en) | 1964-08-06 |
Family
ID=9774799
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| GB431263A Expired GB966284A (en) | 1963-02-01 | 1963-02-01 | Electrical capacitors |
Country Status (1)
| Country | Link |
|---|---|
| GB (1) | GB966284A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB2286724A (en) * | 1994-01-26 | 1995-08-23 | Konek S A L | Condenser for telephone ringing circuit |
-
1963
- 1963-02-01 GB GB431263A patent/GB966284A/en not_active Expired
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB2286724A (en) * | 1994-01-26 | 1995-08-23 | Konek S A L | Condenser for telephone ringing circuit |
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