GB1006287A - Improvements in or relating to manufacturing aluminium oxide films - Google Patents

Improvements in or relating to manufacturing aluminium oxide films

Info

Publication number
GB1006287A
GB1006287A GB10628/62A GB1062862A GB1006287A GB 1006287 A GB1006287 A GB 1006287A GB 10628/62 A GB10628/62 A GB 10628/62A GB 1062862 A GB1062862 A GB 1062862A GB 1006287 A GB1006287 A GB 1006287A
Authority
GB
United Kingdom
Prior art keywords
weight
acid
aluminium
foil
aluminium oxide
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
Application number
GB10628/62A
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Koninklijke Philips NV
Original Assignee
Philips Gloeilampenfabrieken NV
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by Philips Gloeilampenfabrieken NV filed Critical Philips Gloeilampenfabrieken NV
Publication of GB1006287A publication Critical patent/GB1006287A/en
Expired legal-status Critical Current

Links

Classifications

    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01J—ELECTRIC DISCHARGE TUBES OR DISCHARGE LAMPS
    • H01J5/00—Details relating to vessels or to leading-in conductors common to two or more basic types of discharge tubes or lamps
    • H01J5/02—Vessels; Containers; Shields associated therewith; Vacuum locks
    • H01J5/18—Windows permeable to X-rays, gamma-rays, or particles
    • C—CHEMISTRY; METALLURGY
    • C23—COATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; CHEMICAL SURFACE TREATMENT; DIFFUSION TREATMENT OF METALLIC MATERIAL; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL; INHIBITING CORROSION OF METALLIC MATERIAL OR INCRUSTATION IN GENERAL
    • C23F—NON-MECHANICAL REMOVAL OF METALLIC MATERIAL FROM SURFACE; INHIBITING CORROSION OF METALLIC MATERIAL OR INCRUSTATION IN GENERAL; MULTI-STEP PROCESSES FOR SURFACE TREATMENT OF METALLIC MATERIAL INVOLVING AT LEAST ONE PROCESS PROVIDED FOR IN CLASS C23 AND AT LEAST ONE PROCESS COVERED BY SUBCLASS C21D OR C22F OR CLASS C25
    • C23F1/00—Etching metallic material by chemical means
    • C23F1/02—Local etching
    • 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
    • C25D11/06—Anodisation of aluminium or alloys based thereon characterised by the electrolytes used
    • C25D11/08—Anodisation of aluminium or alloys based thereon characterised by the electrolytes used containing inorganic acids
    • 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
    • C25D11/06—Anodisation of aluminium or alloys based thereon characterised by the electrolytes used
    • C25D11/10—Anodisation of aluminium or alloys based thereon characterised by the electrolytes used containing organic acids
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01J—ELECTRIC DISCHARGE TUBES OR DISCHARGE LAMPS
    • H01J29/00—Details of cathode-ray tubes or of electron-beam tubes of the types covered by group H01J31/00
    • H01J29/02—Electrodes; Screens; Mounting, supporting, spacing or insulating thereof
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01J—ELECTRIC DISCHARGE TUBES OR DISCHARGE LAMPS
    • H01J29/00—Details of cathode-ray tubes or of electron-beam tubes of the types covered by group H01J31/00
    • H01J29/02—Electrodes; Screens; Mounting, supporting, spacing or insulating thereof
    • H01J29/08—Electrodes intimately associated with a screen on or from which an image or pattern is formed, picked-up, converted or stored, e.g. backing-plates for storage tubes or collecting secondary electrons
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01J—ELECTRIC DISCHARGE TUBES OR DISCHARGE LAMPS
    • H01J47/00—Tubes for determining the presence, intensity, density or energy of radiation or particles
    • H01J47/08—Geiger-Müller counter tubes

Landscapes

  • Chemical & Material Sciences (AREA)
  • Organic Chemistry (AREA)
  • Engineering & Computer Science (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Materials Engineering (AREA)
  • Metallurgy (AREA)
  • Electrochemistry (AREA)
  • General Chemical & Material Sciences (AREA)
  • Mechanical Engineering (AREA)
  • Inorganic Chemistry (AREA)
  • Other Surface Treatments For Metallic Materials (AREA)
  • Chemical Treatment Of Metals (AREA)
  • ing And Chemical Polishing (AREA)

Abstract

Aluminium oxide films having a thickness of from 1/4 to 25 microns are produced by reducing the thickness of a central portion of an aluminium foil initially at least 50 microns thick by subjecting one or both sides of said central portion one or more times to a surface treatment consisting of anodic oxidative followed by chemical removal of the aluminium oxide formed, until the said central portion remaining consists of aluminium foil not thicker than 20 microns, supported by the untreated portion of the foil, subjecting both sides of the remaining thinned foil to anodic oxidation, chemically removing the resulting oxide layer from one side only, and then dissolving the remaining aluminium metal to leave a film of aluminium oxide supported within the untreated portion of the original foil. The initial anodic oxidation can be carried out in a bath containing an aqueous solution of 10-15% by weight of sulphuric acid or 4-8% by weight of oxalic acid, the final oxidation is preferably carried out in an electrolyte consisting of an aqueous solution of 6% by weight of boric acid and 1.5% by weight of sodium borate. The reagent which dissolves aluminium oxide, without attaching aluminium may be a mixture of hydrofluoric acid and nitric acid or a mixture of chromic acid and phosphonic acid. A preferred reagent is an aqueous solution of 10% by weight of phosphoric acid and 5% by weight of sodium bichromate. The aluminium is dissolved by a solution of concentrated hydrochloric acid containing 3% by weight of sodium bichromate and a trace of copper chloride.
GB10628/62A 1961-03-23 1962-03-20 Improvements in or relating to manufacturing aluminium oxide films Expired GB1006287A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
NL262772 1961-03-23

Publications (1)

Publication Number Publication Date
GB1006287A true GB1006287A (en) 1965-09-29

Family

ID=19752943

Family Applications (1)

Application Number Title Priority Date Filing Date
GB10628/62A Expired GB1006287A (en) 1961-03-23 1962-03-20 Improvements in or relating to manufacturing aluminium oxide films

Country Status (5)

Country Link
JP (1) JPS3925466B1 (en)
DE (1) DE1446020B2 (en)
FR (1) FR1319525A (en)
GB (1) GB1006287A (en)
NL (1) NL262772A (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2227118A (en) * 1988-11-30 1990-07-18 Outokumpu Oy Analyser detector window

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN113388873A (en) * 2021-04-25 2021-09-14 中国科学院福建物质结构研究所 Flaky alumina and preparation method and application thereof

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2227118A (en) * 1988-11-30 1990-07-18 Outokumpu Oy Analyser detector window
GB2227118B (en) * 1988-11-30 1993-06-16 Outokumpu Oy X-ray analyser having a polyimide detector window

Also Published As

Publication number Publication date
JPS3925466B1 (en) 1964-11-11
FR1319525A (en) 1963-03-01
NL262772A (en)
DE1446020A1 (en) 1970-08-20
DE1446020B2 (en) 1972-04-13

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