GB1460622A - Production of moisture sensitive elements - Google Patents

Production of moisture sensitive elements

Info

Publication number
GB1460622A
GB1460622A GB2016674A GB2016674A GB1460622A GB 1460622 A GB1460622 A GB 1460622A GB 2016674 A GB2016674 A GB 2016674A GB 2016674 A GB2016674 A GB 2016674A GB 1460622 A GB1460622 A GB 1460622A
Authority
GB
United Kingdom
Prior art keywords
aluminium
oxide film
heating
oxide
production
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
GB2016674A
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.)
RIKEN Institute of Physical and Chemical Research
Original Assignee
RIKEN Institute of Physical and Chemical Research
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 RIKEN Institute of Physical and Chemical Research filed Critical RIKEN Institute of Physical and Chemical Research
Priority to GB2016674A priority Critical patent/GB1460622A/en
Publication of GB1460622A publication Critical patent/GB1460622A/en
Expired legal-status Critical Current

Links

Classifications

    • 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
    • C23F1/10—Etching compositions
    • C23F1/14—Aqueous compositions
    • 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
    • C23F1/10—Etching compositions
    • 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
    • C25D11/18—After-treatment, e.g. pore-sealing
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
    • G01N27/00—Investigating or analysing materials by the use of electric, electrochemical, or magnetic means
    • G01N27/02—Investigating or analysing materials by the use of electric, electrochemical, or magnetic means by investigating impedance
    • G01N27/04—Investigating or analysing materials by the use of electric, electrochemical, or magnetic means by investigating impedance by investigating resistance
    • G01N27/12—Investigating or analysing materials by the use of electric, electrochemical, or magnetic means by investigating impedance by investigating resistance of a solid body in dependence upon absorption of a fluid; of a solid body in dependence upon reaction with a fluid, for detecting components in the fluid
    • G01N27/121—Investigating or analysing materials by the use of electric, electrochemical, or magnetic means by investigating impedance by investigating resistance of a solid body in dependence upon absorption of a fluid; of a solid body in dependence upon reaction with a fluid, for detecting components in the fluid for determining moisture content, e.g. humidity, of the fluid

Abstract

1460622 Alumina films RIKAGAKU KENKYUSHO 7 May 1974 20166/74 Heading C1A [Also in Divisions C7 and G1] A transducer for measuring humidity is prepared by (a) the anodic oxidation of a sheet of aluminium using oxalic acid, sulphuric acid or chromic acid, (b) removing the remaining aluminium using an aqueous solution of mercuric chloride or a methanolic solution of bromine or iodine, (c) heating the remaining porous aluminium oxide film to 1000‹ C. and exposing it to boiling water or steam, or heating the oxide film to 1200‹ C., (d) adding electrodes to either side of the oxide film. The process converts γ-aluminium oxide to another form of oxide, thereby reducing the time taken for stabilizing its electrical conductance.
GB2016674A 1974-05-07 1974-05-07 Production of moisture sensitive elements Expired GB1460622A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
GB2016674A GB1460622A (en) 1974-05-07 1974-05-07 Production of moisture sensitive elements

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB2016674A GB1460622A (en) 1974-05-07 1974-05-07 Production of moisture sensitive elements

Publications (1)

Publication Number Publication Date
GB1460622A true GB1460622A (en) 1977-01-06

Family

ID=10141473

Family Applications (1)

Application Number Title Priority Date Filing Date
GB2016674A Expired GB1460622A (en) 1974-05-07 1974-05-07 Production of moisture sensitive elements

Country Status (1)

Country Link
GB (1) GB1460622A (en)

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0224087A2 (en) * 1985-11-29 1987-06-03 Bernhard Thiel Method of making thin-walled ceramic articles, and a diaphragm for acoustic transducers produced thereby
EP0264210A2 (en) * 1986-10-15 1988-04-20 Canpolar Inc. Chemical probe and enzyme sensor therefor
EP2458033A1 (en) * 2010-10-11 2012-05-30 Univerza V Mariboru Procedure of dynamic deep etching and particle extraction from aluminium alloys
CN115032245A (en) * 2022-05-23 2022-09-09 飞思仪表（深圳）有限公司 Manufacturing method of aluminum oxide interdigital humidity sensor and interdigital humidity sensor

Cited By (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0224087A2 (en) * 1985-11-29 1987-06-03 Bernhard Thiel Method of making thin-walled ceramic articles, and a diaphragm for acoustic transducers produced thereby
EP0224087A3 (en) * 1985-11-29 1989-05-31 Bernhard Thiel Method of making thin-walled ceramic articles, and a diaphragm for acoustic transducers produced thereby
EP0264210A2 (en) * 1986-10-15 1988-04-20 Canpolar Inc. Chemical probe and enzyme sensor therefor
EP0264210A3 (en) * 1986-10-15 1989-09-20 Canpolar Inc. Chemical probe and enzyme sensor therefor
EP2458033A1 (en) * 2010-10-11 2012-05-30 Univerza V Mariboru Procedure of dynamic deep etching and particle extraction from aluminium alloys
CN115032245A (en) * 2022-05-23 2022-09-09 飞思仪表（深圳）有限公司 Manufacturing method of aluminum oxide interdigital humidity sensor and interdigital humidity sensor
CN115032245B (en) * 2022-05-23 2024-04-30 飞思仪表（深圳）有限公司 Manufacturing method of aluminum oxide interdigital humidity sensor and interdigital humidity sensor

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Legal Events

Date Code Title Description
PS Patent sealed
PCNP Patent ceased through non-payment of renewal fee