GB1460622A - Production of moisture sensitive elements - Google Patents
Production of moisture sensitive elementsInfo
- 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
Links
- PNEYBMLMFCGWSK-UHFFFAOYSA-N aluminium oxide Inorganic materials [O-2].[O-2].[O-2].[Al+3].[Al+3] PNEYBMLMFCGWSK-UHFFFAOYSA-N 0.000 abstract 5
- MUBZPKHOEPUJKR-UHFFFAOYSA-N Oxalic acid Chemical compound OC(=O)C(O)=O MUBZPKHOEPUJKR-UHFFFAOYSA-N 0.000 abstract 3
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 abstract 2
- 229910052782 aluminium Inorganic materials 0.000 abstract 2
- 239000004411 aluminium Substances 0.000 abstract 2
- 238000010438 heat treatment Methods 0.000 abstract 2
- WKBOTKDWSSQWDR-UHFFFAOYSA-N Bromine atom Chemical compound [Br] WKBOTKDWSSQWDR-UHFFFAOYSA-N 0.000 abstract 1
- QAOWNCQODCNURD-UHFFFAOYSA-N Sulfuric acid Chemical compound OS(O)(=O)=O QAOWNCQODCNURD-UHFFFAOYSA-N 0.000 abstract 1
- 239000007864 aqueous solution Substances 0.000 abstract 1
- 238000009835 boiling Methods 0.000 abstract 1
- GDTBXPJZTBHREO-UHFFFAOYSA-N bromine Substances BrBr GDTBXPJZTBHREO-UHFFFAOYSA-N 0.000 abstract 1
- 229910052794 bromium Inorganic materials 0.000 abstract 1
- KRVSOGSZCMJSLX-UHFFFAOYSA-L chromic acid Substances O[Cr](O)(=O)=O KRVSOGSZCMJSLX-UHFFFAOYSA-L 0.000 abstract 1
- AWJWCTOOIBYHON-UHFFFAOYSA-N furo[3,4-b]pyrazine-5,7-dione Chemical compound C1=CN=C2C(=O)OC(=O)C2=N1 AWJWCTOOIBYHON-UHFFFAOYSA-N 0.000 abstract 1
- PNDPGZBMCMUPRI-UHFFFAOYSA-N iodine Chemical compound II PNDPGZBMCMUPRI-UHFFFAOYSA-N 0.000 abstract 1
- 229960002523 mercuric chloride Drugs 0.000 abstract 1
- LWJROJCJINYWOX-UHFFFAOYSA-L mercury dichloride Chemical compound Cl[Hg]Cl LWJROJCJINYWOX-UHFFFAOYSA-L 0.000 abstract 1
- 238000000034 method Methods 0.000 abstract 1
- 235000006408 oxalic acid Nutrition 0.000 abstract 1
- 230000003647 oxidation Effects 0.000 abstract 1
- 238000007254 oxidation reaction Methods 0.000 abstract 1
- 239000000243 solution Substances 0.000 abstract 1
- 230000000087 stabilizing effect Effects 0.000 abstract 1
- 235000011149 sulphuric acid Nutrition 0.000 abstract 1
- 239000001117 sulphuric acid Substances 0.000 abstract 1
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 abstract 1
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
Landscapes
- Chemical & Material Sciences (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Metallurgy (AREA)
- Engineering & Computer Science (AREA)
- Materials Engineering (AREA)
- Organic Chemistry (AREA)
- Electrochemistry (AREA)
- Mechanical Engineering (AREA)
- General Chemical & Material Sciences (AREA)
- Physics & Mathematics (AREA)
- Health & Medical Sciences (AREA)
- Life Sciences & Earth Sciences (AREA)
- Analytical Chemistry (AREA)
- Biochemistry (AREA)
- General Health & Medical Sciences (AREA)
- General Physics & Mathematics (AREA)
- Immunology (AREA)
- Pathology (AREA)
- Investigating Or Analyzing Materials By The Use Of Fluid Adsorption Or Reactions (AREA)
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.
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)
| 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 |
-
1974
- 1974-05-07 GB GB2016674A patent/GB1460622A/en not_active Expired
Cited By (7)
| 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 |