GB1121241A - Improvements relating to methods of producing alumina films - Google Patents
Improvements relating to methods of producing alumina filmsInfo
- Publication number
- GB1121241A GB1121241A GB346567A GB346567A GB1121241A GB 1121241 A GB1121241 A GB 1121241A GB 346567 A GB346567 A GB 346567A GB 346567 A GB346567 A GB 346567A GB 1121241 A GB1121241 A GB 1121241A
- Authority
- GB
- United Kingdom
- Prior art keywords
- alumina
- film
- frame
- foil
- aluminium
- 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
Classifications
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01J—ELECTRIC DISCHARGE TUBES OR DISCHARGE LAMPS
- H01J9/00—Apparatus or processes specially adapted for the manufacture, installation, removal, maintenance of electric discharge tubes, discharge lamps, or parts thereof; Recovery of material from discharge tubes or lamps
- H01J9/02—Manufacture of electrodes or electrode systems
- H01J9/14—Manufacture of electrodes or electrode systems of non-emitting electrodes
-
- C—CHEMISTRY; METALLURGY
- C25—ELECTROLYTIC OR ELECTROPHORETIC PROCESSES; APPARATUS THEREFOR
- C25D—PROCESSES FOR THE ELECTROLYTIC OR ELECTROPHORETIC PRODUCTION OF COATINGS; ELECTROFORMING; APPARATUS THEREFOR
- C25D11/00—Electrolytic coating by surface reaction, i.e. forming conversion layers
- C25D11/02—Anodisation
- C25D11/04—Anodisation of aluminium or alloys based thereon
-
- C—CHEMISTRY; METALLURGY
- C25—ELECTROLYTIC OR ELECTROPHORETIC PROCESSES; APPARATUS THEREFOR
- C25D—PROCESSES FOR THE ELECTROLYTIC OR ELECTROPHORETIC PRODUCTION OF COATINGS; ELECTROFORMING; APPARATUS THEREFOR
- C25D11/00—Electrolytic coating by surface reaction, i.e. forming conversion layers
- C25D11/02—Anodisation
- C25D11/04—Anodisation of aluminium or alloys based thereon
- C25D11/045—Anodisation of aluminium or alloys based thereon for forming AAO templates
Landscapes
- Chemical & Material Sciences (AREA)
- Engineering & Computer Science (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Electrochemistry (AREA)
- Materials Engineering (AREA)
- Metallurgy (AREA)
- Organic Chemistry (AREA)
- Manufacturing & Machinery (AREA)
- Chemical Treatment Of Metals (AREA)
- Compounds Of Alkaline-Earth Elements, Aluminum Or Rare-Earth Metals (AREA)
Abstract
A method of manufacturing an alumina film comprises the steps of forming a porous alumina frame 5-20 m thick on one side of an aluminium foil by anodic oxidation, forming an alumina film on the same side of the foil by anodic oxidation of the foil enclosed by said frame such that the film and the frame are integral, and then removing the remaining metallic aluminium with the aid of a reagent which dissolves aluminium but does not appreciably attack the alumina. The porous alumina frame may be formed using an oxalic acid or sulphuric acid electrolyte and the alumina film, which may be about 0.1 m thick, may be formed using a 4% aqueous solution of tartaric acid or a 6% aqueous solution of boric acid containing 1.5% sodium borate. The reagent used to dissolve the metallic aluminium may be a mixture of hydrofluoric and nitric acids or a mixture of chromic and phosphoric acids. The film may be formed with two concentric annular frames, the outer being later cut away. A vopour deposited layer, e.g. of PbO may be formed upon the alumina film.
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| NL6601018A NL6601018A (en) | 1966-01-27 | 1966-01-27 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| GB1121241A true GB1121241A (en) | 1968-07-24 |
Family
ID=19795567
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| GB346567A Expired GB1121241A (en) | 1966-01-27 | 1967-01-24 | Improvements relating to methods of producing alumina films |
Country Status (5)
| Country | Link |
|---|---|
| BE (1) | BE693171A (en) |
| DE (1) | DE1621121B1 (en) |
| FR (1) | FR1509535A (en) |
| GB (1) | GB1121241A (en) |
| NL (1) | NL6601018A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4278737A (en) | 1978-08-04 | 1981-07-14 | United States Borax & Chemical Corporation | Anodizing aluminum |
Family Cites Families (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE1131481B (en) * | 1958-03-03 | 1962-06-14 | Dr Ulrich Hauser | Aluminum oxide or beryllium oxide film as a window for the passage of radiation and process for their production |
-
1966
- 1966-01-27 NL NL6601018A patent/NL6601018A/xx unknown
-
1967
- 1967-01-24 GB GB346567A patent/GB1121241A/en not_active Expired
- 1967-01-24 DE DE1967N0029883 patent/DE1621121B1/en active Pending
- 1967-01-25 BE BE693171D patent/BE693171A/xx unknown
- 1967-01-27 FR FR92731A patent/FR1509535A/en not_active Expired
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4278737A (en) | 1978-08-04 | 1981-07-14 | United States Borax & Chemical Corporation | Anodizing aluminum |
Also Published As
| Publication number | Publication date |
|---|---|
| FR1509535A (en) | 1968-01-12 |
| DE1621121B1 (en) | 1970-06-25 |
| NL6601018A (en) | 1967-07-28 |
| BE693171A (en) | 1967-07-25 |
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