GB892530A - Improvements in or relating to electrically heatable filaments - Google Patents
Improvements in or relating to electrically heatable filamentsInfo
- Publication number
- GB892530A GB892530A GB5224/58A GB522458A GB892530A GB 892530 A GB892530 A GB 892530A GB 5224/58 A GB5224/58 A GB 5224/58A GB 522458 A GB522458 A GB 522458A GB 892530 A GB892530 A GB 892530A
- Authority
- GB
- United Kingdom
- Prior art keywords
- layer
- coating
- pellet
- alumina
- wire
- 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
- 239000011248 coating agent Substances 0.000 abstract 3
- 238000000576 coating method Methods 0.000 abstract 3
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N Silicium dioxide Chemical compound O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 abstract 2
- JLDSOYXADOWAKB-UHFFFAOYSA-N aluminium nitrate Chemical compound [Al+3].[O-][N+]([O-])=O.[O-][N+]([O-])=O.[O-][N+]([O-])=O JLDSOYXADOWAKB-UHFFFAOYSA-N 0.000 abstract 2
- PNEYBMLMFCGWSK-UHFFFAOYSA-N aluminium oxide Inorganic materials [O-2].[O-2].[O-2].[Al+3].[Al+3] PNEYBMLMFCGWSK-UHFFFAOYSA-N 0.000 abstract 2
- 239000003054 catalyst Substances 0.000 abstract 2
- 230000003197 catalytic effect Effects 0.000 abstract 2
- 229910052751 metal Inorganic materials 0.000 abstract 2
- 239000002184 metal Substances 0.000 abstract 2
- 239000008188 pellet Substances 0.000 abstract 2
- WGLPBDUCMAPZCE-UHFFFAOYSA-N Trioxochromium Chemical compound O=[Cr](=O)=O WGLPBDUCMAPZCE-UHFFFAOYSA-N 0.000 abstract 1
- 239000002253 acid Substances 0.000 abstract 1
- 229910000423 chromium oxide Inorganic materials 0.000 abstract 1
- 150000001875 compounds Chemical class 0.000 abstract 1
- 239000007789 gas Substances 0.000 abstract 1
- 238000004868 gas analysis Methods 0.000 abstract 1
- 238000010438 heat treatment Methods 0.000 abstract 1
- 239000000463 material Substances 0.000 abstract 1
- 230000003647 oxidation Effects 0.000 abstract 1
- 238000007254 oxidation reaction Methods 0.000 abstract 1
- PIBWKRNGBLPSSY-UHFFFAOYSA-L palladium(II) chloride Chemical compound Cl[Pd]Cl PIBWKRNGBLPSSY-UHFFFAOYSA-L 0.000 abstract 1
- BASFCYQUMIYNBI-UHFFFAOYSA-N platinum Chemical group [Pt] BASFCYQUMIYNBI-UHFFFAOYSA-N 0.000 abstract 1
- 239000002574 poison Substances 0.000 abstract 1
- 231100000614 poison Toxicity 0.000 abstract 1
- 239000011819 refractory material Substances 0.000 abstract 1
- 239000000377 silicon dioxide Substances 0.000 abstract 1
Classifications
-
- H—ELECTRICITY
- H05—ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
- H05B—ELECTRIC HEATING; ELECTRIC LIGHT SOURCES NOT OTHERWISE PROVIDED FOR; CIRCUIT ARRANGEMENTS FOR ELECTRIC LIGHT SOURCES, IN GENERAL
- H05B3/00—Ohmic-resistance heating
- H05B3/10—Heating elements characterised by the composition or nature of the materials or by the arrangement of the conductor
- H05B3/18—Heating elements characterised by the composition or nature of the materials or by the arrangement of the conductor the conductor being embedded in an insulating material
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01J—CHEMICAL OR PHYSICAL PROCESSES, e.g. CATALYSIS OR COLLOID CHEMISTRY; THEIR RELEVANT APPARATUS
- B01J35/00—Catalysts, in general, characterised by their form or physical properties
- B01J35/50—Catalysts, in general, characterised by their form or physical properties characterised by their shape or configuration
- B01J35/58—Fabrics or filaments
-
- 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
- G01N27/14—Investigating or analysing materials by the use of electric, electrochemical, or magnetic means by investigating impedance by investigating resistance of an electrically-heated body in dependence upon change of temperature
- G01N27/16—Investigating or analysing materials by the use of electric, electrochemical, or magnetic means by investigating impedance by investigating resistance of an electrically-heated body in dependence upon change of temperature caused by burning or catalytic oxidation of surrounding material to be tested, e.g. of gas
-
- 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
- G01N27/14—Investigating or analysing materials by the use of electric, electrochemical, or magnetic means by investigating impedance by investigating resistance of an electrically-heated body in dependence upon change of temperature
- G01N27/18—Investigating or analysing materials by the use of electric, electrochemical, or magnetic means by investigating impedance by investigating resistance of an electrically-heated body in dependence upon change of temperature caused by changes in the thermal conductivity of a surrounding material to be tested
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01B—CABLES; CONDUCTORS; INSULATORS; SELECTION OF MATERIALS FOR THEIR CONDUCTIVE, INSULATING OR DIELECTRIC PROPERTIES
- H01B3/00—Insulators or insulating bodies characterised by the insulating materials; Selection of materials for their insulating or dielectric properties
- H01B3/02—Insulators or insulating bodies characterised by the insulating materials; Selection of materials for their insulating or dielectric properties mainly consisting of inorganic substances
- H01B3/10—Insulators or insulating bodies characterised by the insulating materials; Selection of materials for their insulating or dielectric properties mainly consisting of inorganic substances metallic oxides
Landscapes
- Chemical & Material Sciences (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Electrochemistry (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)
- Engineering & Computer Science (AREA)
- Ceramic Engineering (AREA)
- Inorganic Chemistry (AREA)
- Materials Engineering (AREA)
- Organic Chemistry (AREA)
- Investigating Or Analyzing Materials By The Use Of Electric Means (AREA)
- Catalysts (AREA)
Abstract
<PICT:0892530/III/1> An electrically heatable element comprises a metal filament embedded in a layer or layers of an oxide or other refractory material forming a coating or pellet and a layer of catalyst upon said coating or pellet. As shown, the element comprises a helical coil 57 of a platinum group metal surrounded by a layer 58 of silica or alumina which is formed by applying successive portions of a paste or solution of a compound to the wire and after the application of each portion, passing an electric current to heat the wire. A catalytic layer 59 is obtained by applying a solution comprising palladous chloride, chlorplatinic acid and aluminium nitrate. If desired a further coating of alumina may then be provided and by heating to 1000 DEG C. the catalytic components diffuse therethrough. The elements may be used in a Wheatstone bridge circuit in gas analysis apparatus. A compensating element may comprise also chromium oxide or other catalyst poison thereby suppressing oxidation of combustible gases. Such a material may also be added when the element is used in the type of apparatus shown in Specification 892,531.
Priority Applications (3)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| NL236206D NL236206A (en) | 1958-02-18 | ||
| GB5224/58A GB892530A (en) | 1958-02-18 | 1958-02-18 | Improvements in or relating to electrically heatable filaments |
| FR786861A FR1224297A (en) | 1958-02-18 | 1959-02-16 | Electrically heatable filaments |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| GB5224/58A GB892530A (en) | 1958-02-18 | 1958-02-18 | Improvements in or relating to electrically heatable filaments |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| GB892530A true GB892530A (en) | 1962-03-28 |
Family
ID=9792033
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| GB5224/58A Expired GB892530A (en) | 1958-02-18 | 1958-02-18 | Improvements in or relating to electrically heatable filaments |
Country Status (3)
| Country | Link |
|---|---|
| FR (1) | FR1224297A (en) |
| GB (1) | GB892530A (en) |
| NL (1) | NL236206A (en) |
Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4036592A (en) | 1974-06-05 | 1977-07-19 | National Research Development Corporation | Detection of carbon monoxide |
| DE3122662A1 (en) * | 1980-06-11 | 1982-04-01 | Mine Safety Appliances Co. Ltd., Reading, Berkshire | Electrically heatable element and method of producing it |
| DE3135101A1 (en) * | 1980-09-05 | 1982-04-08 | National Research Development Corp., London | GAS SENSITIVE ELEMENT |
| US4416911A (en) | 1980-01-02 | 1983-11-22 | International Gas Detectors Limited | Gas sensor elements and methods of manufacturing them |
| GB2121180A (en) * | 1982-05-01 | 1983-12-14 | English Electric Valve Co Ltd | Catalytic combustible-gas detectors |
| GB2129134A (en) * | 1982-10-13 | 1984-05-10 | English Electric Valve Co Ltd | Catalytic combustible-gas detectors |
| US20180074000A1 (en) * | 2014-06-30 | 2018-03-15 | Stmicroelectronics S.R.L. | Semiconductor gas sensor device and manufacturing method thereof |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE2740158A1 (en) * | 1977-09-02 | 1979-03-15 | Auergesellschaft Gmbh | CATALYTICALLY INACTIVE GAS DETECTING ELEMENT AND METHOD FOR THE PRODUCTION THEREOF |
-
0
- NL NL236206D patent/NL236206A/xx unknown
-
1958
- 1958-02-18 GB GB5224/58A patent/GB892530A/en not_active Expired
-
1959
- 1959-02-16 FR FR786861A patent/FR1224297A/en not_active Expired
Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4036592A (en) | 1974-06-05 | 1977-07-19 | National Research Development Corporation | Detection of carbon monoxide |
| US4416911A (en) | 1980-01-02 | 1983-11-22 | International Gas Detectors Limited | Gas sensor elements and methods of manufacturing them |
| DE3122662A1 (en) * | 1980-06-11 | 1982-04-01 | Mine Safety Appliances Co. Ltd., Reading, Berkshire | Electrically heatable element and method of producing it |
| DE3135101A1 (en) * | 1980-09-05 | 1982-04-08 | National Research Development Corp., London | GAS SENSITIVE ELEMENT |
| GB2121180A (en) * | 1982-05-01 | 1983-12-14 | English Electric Valve Co Ltd | Catalytic combustible-gas detectors |
| GB2129134A (en) * | 1982-10-13 | 1984-05-10 | English Electric Valve Co Ltd | Catalytic combustible-gas detectors |
| US20180074000A1 (en) * | 2014-06-30 | 2018-03-15 | Stmicroelectronics S.R.L. | Semiconductor gas sensor device and manufacturing method thereof |
| US10180406B2 (en) * | 2014-06-30 | 2019-01-15 | Stmicroelectronics S.R.L. | Semiconductor gas sensor device and manufacturing method thereof |
Also Published As
| Publication number | Publication date |
|---|---|
| FR1224297A (en) | 1960-06-23 |
| NL236206A (en) |
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