WO1998043076A1 - Mineralisolierte zuleitung - Google Patents
Mineralisolierte zuleitung Download PDFInfo
- Publication number
- WO1998043076A1 WO1998043076A1 PCT/EP1998/001528 EP9801528W WO9843076A1 WO 1998043076 A1 WO1998043076 A1 WO 1998043076A1 EP 9801528 W EP9801528 W EP 9801528W WO 9843076 A1 WO9843076 A1 WO 9843076A1
- Authority
- WO
- WIPO (PCT)
- Prior art keywords
- mineral
- inner conductor
- insulated
- supply line
- feed line
- Prior art date
Links
Classifications
-
- 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
- G01N27/26—Investigating or analysing materials by the use of electric, electrochemical, or magnetic means by investigating electrochemical variables; by using electrolysis or electrophoresis
- G01N27/403—Cells and electrode assemblies
- G01N27/406—Cells and probes with solid electrolytes
- G01N27/407—Cells and probes with solid electrolytes for investigating or analysing gases
-
- 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
- G01N27/26—Investigating or analysing materials by the use of electric, electrochemical, or magnetic means by investigating electrochemical variables; by using electrolysis or electrophoresis
- G01N27/403—Cells and electrode assemblies
- G01N27/406—Cells and probes with solid electrolytes
- G01N27/407—Cells and probes with solid electrolytes for investigating or analysing gases
- G01N27/4077—Means for protecting the electrolyte or the electrodes
Definitions
- the invention relates to a mineral-insulated feed line for a sensor with a jacket and at least one inner conductor arranged in the jacket, which is connected at one end to a sensor element or its feed line, the jacket containing a mineral powder as insulation material.
- the invention further relates to the use of such a feed line.
- DE 43 30 447 A1 describes a mineral-insulated supply line for a temperature sensor.
- This lead has an inner conductor made of a nickel-chromium alloy.
- a similar feed line is known from DE 69942, in which the inner conductor has wires made of a noble metal, which are surrounded by a jacket made of a nickel-chromium or nickel-chromium-iron alloy.
- Similar supply lines are known from DE 40 22 051 A1 and from US-A-4,590,669.
- These mineral insulated supply lines are used for resistance thermometers or as thermocouple wires. They make use of the property of the measuring element that its electrical resistance or thermal voltage depends on the temperature of the material.
- At least one inner conductor is formed from a metal from the group consisting of tantalum, titanium, niobium, molybdenum, vanadium, zirconium, rhenium, osmium or from an alloy based on at least one of these metals.
- a supply line is very resistant to high temperatures and corrosion, so that it can even be expediently designed and suitable as a supply line for a heater, which may be comprised by a gas sensor, and the supply line is directly exposed to the hot exhaust gas and its corrosive effect is.
- the second inner conductor should preferably be made of a known iron-chromium-nickel alloy. If, for example, tantalum is used as the anode, a different material can also be selected for the cathode.
- the at least one inner conductor has a coating which is catalytically active for reducing gases, preferably made of a noble metal or a noble metal alloy.
- This coating can be used to catalyze reducing gases (hot exhaust gases), in particular H 2 .
- the jacket is closed at both ends and only has bushings for the at least one inner conductor, so that the insulation material is protected.
- the mineral-insulated feed line can be used for a gas sensor for measuring gaseous components in a gas mixture and in particular for the feed line of a heater of the gas sensor.
- FIG. 1 shows a partial section through a mineral-insulated supply line
- FIG. 2 shows an arrangement for a corrosion test
- FIG. 3 shows another arrangement for a corrosion test.
- the mineral-insulated supply line 1 has a jacket 2, which is made of a common metal, for. B. Inconel is formed.
- a plurality of inner conductors 4 are arranged within the jacket 2, embedded in an insulating material 3.
- Magnesium oxide or aluminum oxide, for example, can be used as the insulating material 3.
- the inner conductors 4 are formed from tantalum. They have a coating 5 made of platinum or palladium, which is used to catalyze reducing gases.
- the inner conductor serving as the cathode is made of Inconel and the inner conductor serving as the anode is made of titanium (or tantalum).
- at least one sensor element is connected to the inner conductor on one side.
- Such a sensor element for measuring gaseous components of a gas mixture has a heater which is connected to an inner conductor 4 (anode - titanium).
- the inner conductor 4 is traversed by current during the measurement, a relatively high current flowing through the inner conductor used as the supply line to the heater. Nevertheless, the inner conductors are very stable, they do not corrode and therefore on the one hand represent a reliable connection to the sensor element and on the other hand enable reproducible measurements over long periods of time.
- the corrosion resistance is shown below using exemplary tests.
- the test was carried out in an arrangement shown in FIG. 2.
- anode A material to be tested
- a wire with a diameter of approximately 1.5 mm was placed in an electrolyte E submerged.
- the electrolyte E was formed from a synthetic exhaust gas condensate.
- a platinum wire with a diameter of approximately 1.5 mm is used as the cathode K.
- Both anode A and cathode K are partially in the electrolyte E.
- the electrolyte E contains 250 mg of 96% H 2 SO 4 , 250 mg of 37% HCl, 1 g of NaCl, the rest of distilled water per liter.
- the voltage between anode A and cathode K is 15 volts.
- the current flowing between anode A and cathode K is measured and represents a measure of the anodic resolution, since a current only flows until the anode A is dissolved.
- Test results for some anode materials are shown in Table 1, the first three materials corresponding to the prior art and the last two materials (tantalum and titanium) being materials according to the invention.
- Table 1 shows that the materials tantalum and titanium are much more stable in the environment relevant to the invention than the known materials.
- a second corrosion test compares different mineral-insulated cables.
- the mineral-insulated cable M has a diameter of approximately 3.5 mm and contains an anode A with a diameter of approximately 0.5 mm and a cathode K, likewise with a diameter of approximately 0.5 mm. It becomes an electrolyte E with the same composition as in the corrosion test 1 used.
- the mineral-insulated cable M from the moisture-proof end of which at least the anode A and the cathode K protrude, is located with this end in the electrolyte E.
- the voltage between the anode A and the cathode K is 15 volts.
- the current flowing between anode A and cathode K is measured and represents a measure of the anodic decomposition (corrosion).
- Table 2 shows in the first line a test with materials according to the prior art (Inconel), both as anode A and as cathode K. In the following three lines, experiments with anode materials according to the invention are listed, different materials being used as the cathode.
Landscapes
- Chemical & Material Sciences (AREA)
- Life Sciences & Earth Sciences (AREA)
- Health & Medical Sciences (AREA)
- Biochemistry (AREA)
- General Physics & Mathematics (AREA)
- Electrochemistry (AREA)
- Physics & Mathematics (AREA)
- Analytical Chemistry (AREA)
- Molecular Biology (AREA)
- General Health & Medical Sciences (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Immunology (AREA)
- Pathology (AREA)
- Measuring Oxygen Concentration In Cells (AREA)
- Investigating Or Analyzing Materials By The Use Of Electric Means (AREA)
- Resistance Heating (AREA)
- Insulated Conductors (AREA)
Abstract
Description
Claims
Priority Applications (4)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
US09/194,224 US6300571B1 (en) | 1997-03-21 | 1998-03-17 | Mineral-insulated supply line |
BR9804787A BR9804787A (pt) | 1997-03-21 | 1998-03-17 | Conduto isolado com mineral |
JP54483498A JP2001524252A (ja) | 1997-03-21 | 1998-03-17 | 鉱物絶縁導線 |
EP98913723A EP0902889A1 (de) | 1997-03-21 | 1998-03-17 | Mineralisolierte zuleitung |
Applications Claiming Priority (4)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE19712026 | 1997-03-21 | ||
DE19712026.1 | 1997-03-21 | ||
DE19808030.1 | 1998-02-26 | ||
DE19808030A DE19808030A1 (de) | 1997-03-21 | 1998-02-26 | Mineralisolierte Zuleitung |
Publications (1)
Publication Number | Publication Date |
---|---|
WO1998043076A1 true WO1998043076A1 (de) | 1998-10-01 |
Family
ID=26035123
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
PCT/EP1998/001528 WO1998043076A1 (de) | 1997-03-21 | 1998-03-17 | Mineralisolierte zuleitung |
Country Status (6)
Country | Link |
---|---|
US (1) | US6300571B1 (de) |
EP (1) | EP0902889A1 (de) |
JP (1) | JP2001524252A (de) |
KR (1) | KR20000015858A (de) |
BR (1) | BR9804787A (de) |
WO (1) | WO1998043076A1 (de) |
Families Citing this family (5)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
FR2831269B1 (fr) * | 2001-10-23 | 2004-01-02 | Thales Sa | Ensemble de capteur fonctionnant a haute temperature et procede de montage |
US8187006B2 (en) * | 2009-02-02 | 2012-05-29 | Apex Technologies, Inc | Flexible magnetic interconnects |
US20110224907A1 (en) * | 2010-03-11 | 2011-09-15 | Petrospec Engineering Ltd. | Mineral insulated cable for downhole sensors |
FR2972289B1 (fr) * | 2011-03-01 | 2013-03-01 | Schneider Electric Ind Sas | Conducteur de courant |
FR3107141B1 (fr) | 2020-02-07 | 2022-06-03 | Thermocoax Cie | « Câble blindé à isolant minéral pour ultra haute températures, élément chauffant et câble de transmission, application et procédé de fabrication » |
Citations (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
EP0582830A1 (de) * | 1992-07-31 | 1994-02-16 | Hoechst Aktiengesellschaft | Planarer Sensor aus Keramikmaterial zum Nachweis von brennbaren Gasen |
WO1995005685A1 (en) * | 1993-08-18 | 1995-02-23 | Forskningscenter Risø | A method of producing calcium doped lanthanum chromite |
WO1995018965A1 (de) * | 1994-01-05 | 1995-07-13 | Roth-Technik Gmbh & Co. | Messfühler |
Family Cites Families (13)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US3928071A (en) * | 1974-10-04 | 1975-12-23 | Gen Electric | Hermetically sealed primary battery |
US4267029A (en) * | 1980-01-07 | 1981-05-12 | Pennwalt Corporation | Anode for high resistivity cathodic protection systems |
US4373375A (en) * | 1980-12-19 | 1983-02-15 | General Electric Company | Hydrogen sensor |
DE3300694A1 (de) * | 1983-01-11 | 1984-08-09 | Siemens AG, 1000 Berlin und 8000 München | Bipolare elektrode fuer medizinische anwendungen |
FR2555352B1 (fr) * | 1983-11-21 | 1987-02-20 | Thermocoax Cie | Cable blinde a isolant mineral et procede de fabrication permettant d'obtenir un tel cable |
FR2575321B1 (fr) * | 1984-12-21 | 1988-01-15 | Thermocoax Cie | Cable blinde a isolant mineral |
US5336851A (en) * | 1989-12-27 | 1994-08-09 | Sumitomo Electric Industries, Ltd. | Insulated electrical conductor wire having a high operating temperature |
EP0510258B1 (de) * | 1991-04-26 | 1995-06-14 | Sumitomo Electric Industries, Limited | Verfahren zur Herstellung einer Isolierung |
US5156688A (en) * | 1991-06-05 | 1992-10-20 | Xerox Corporation | Thermoelectric device |
JPH06996A (ja) * | 1992-06-19 | 1994-01-11 | Hitachi Koki Co Ltd | 液滴吐出器 |
US5340455A (en) * | 1993-01-22 | 1994-08-23 | Corrpro Companies, Inc. | Cathodic protection system for above-ground storage tank bottoms and method of installing |
DE4338539A1 (de) * | 1993-11-11 | 1995-05-18 | Hoechst Ceram Tec Ag | Verfahren zum Herstellen von keramischen Heizelementen |
US5536478A (en) * | 1994-12-01 | 1996-07-16 | Corning Incorporated | Electrical leads for a fluid heaters |
-
1998
- 1998-03-17 KR KR1019980709408A patent/KR20000015858A/ko not_active Application Discontinuation
- 1998-03-17 BR BR9804787A patent/BR9804787A/pt not_active Application Discontinuation
- 1998-03-17 EP EP98913723A patent/EP0902889A1/de not_active Withdrawn
- 1998-03-17 JP JP54483498A patent/JP2001524252A/ja active Pending
- 1998-03-17 WO PCT/EP1998/001528 patent/WO1998043076A1/de not_active Application Discontinuation
- 1998-03-17 US US09/194,224 patent/US6300571B1/en not_active Expired - Fee Related
Patent Citations (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
EP0582830A1 (de) * | 1992-07-31 | 1994-02-16 | Hoechst Aktiengesellschaft | Planarer Sensor aus Keramikmaterial zum Nachweis von brennbaren Gasen |
WO1995005685A1 (en) * | 1993-08-18 | 1995-02-23 | Forskningscenter Risø | A method of producing calcium doped lanthanum chromite |
WO1995018965A1 (de) * | 1994-01-05 | 1995-07-13 | Roth-Technik Gmbh & Co. | Messfühler |
Also Published As
Publication number | Publication date |
---|---|
EP0902889A1 (de) | 1999-03-24 |
US6300571B1 (en) | 2001-10-09 |
JP2001524252A (ja) | 2001-11-27 |
KR20000015858A (ko) | 2000-03-15 |
BR9804787A (pt) | 1999-08-17 |
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