EP2195647A2 - Verwendung eines ionenleiters für einen gassensor - Google Patents
Verwendung eines ionenleiters für einen gassensorInfo
- Publication number
- EP2195647A2 EP2195647A2 EP08837966A EP08837966A EP2195647A2 EP 2195647 A2 EP2195647 A2 EP 2195647A2 EP 08837966 A EP08837966 A EP 08837966A EP 08837966 A EP08837966 A EP 08837966A EP 2195647 A2 EP2195647 A2 EP 2195647A2
- Authority
- EP
- European Patent Office
- Prior art keywords
- ion conductor
- exhaust gas
- substrate
- determination
- sensor
- 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.)
- Withdrawn
Links
- 239000010416 ion conductor Substances 0.000 title claims abstract description 29
- 239000007789 gas Substances 0.000 claims abstract description 34
- 239000001301 oxygen Substances 0.000 claims abstract description 32
- 229910052760 oxygen Inorganic materials 0.000 claims abstract description 32
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 claims abstract description 28
- BASFCYQUMIYNBI-UHFFFAOYSA-N platinum Chemical compound [Pt] BASFCYQUMIYNBI-UHFFFAOYSA-N 0.000 claims abstract description 24
- 239000000758 substrate Substances 0.000 claims abstract description 24
- 229910052697 platinum Inorganic materials 0.000 claims abstract description 12
- 238000010438 heat treatment Methods 0.000 claims abstract description 10
- PCHJSUWPFVWCPO-UHFFFAOYSA-N gold Chemical compound [Au] PCHJSUWPFVWCPO-UHFFFAOYSA-N 0.000 claims abstract description 7
- 229910052737 gold Inorganic materials 0.000 claims abstract description 7
- 239000010931 gold Substances 0.000 claims abstract description 7
- KDLHZDBZIXYQEI-UHFFFAOYSA-N Palladium Chemical compound [Pd] KDLHZDBZIXYQEI-UHFFFAOYSA-N 0.000 claims abstract description 6
- 229910052703 rhodium Inorganic materials 0.000 claims abstract description 5
- 239000010948 rhodium Substances 0.000 claims abstract description 5
- MHOVAHRLVXNVSD-UHFFFAOYSA-N rhodium atom Chemical compound [Rh] MHOVAHRLVXNVSD-UHFFFAOYSA-N 0.000 claims abstract description 5
- KJTLSVCANCCWHF-UHFFFAOYSA-N Ruthenium Chemical compound [Ru] KJTLSVCANCCWHF-UHFFFAOYSA-N 0.000 claims abstract description 4
- BQCADISMDOOEFD-UHFFFAOYSA-N Silver Chemical compound [Ag] BQCADISMDOOEFD-UHFFFAOYSA-N 0.000 claims abstract description 4
- 229910052707 ruthenium Inorganic materials 0.000 claims abstract description 4
- 229910052709 silver Inorganic materials 0.000 claims abstract description 4
- 239000004332 silver Substances 0.000 claims abstract description 4
- 229910052763 palladium Inorganic materials 0.000 claims abstract description 3
- 239000000919 ceramic Substances 0.000 claims description 9
- 238000000034 method Methods 0.000 claims description 8
- 229910000510 noble metal Inorganic materials 0.000 claims description 8
- 238000002485 combustion reaction Methods 0.000 claims description 5
- 238000004519 manufacturing process Methods 0.000 claims description 3
- 239000000463 material Substances 0.000 claims description 2
- 238000013508 migration Methods 0.000 claims description 2
- 230000005012 migration Effects 0.000 claims description 2
- 238000000926 separation method Methods 0.000 claims 1
- 239000004020 conductor Substances 0.000 abstract description 2
- 230000001012 protector Effects 0.000 abstract 1
- MCMNRKCIXSYSNV-UHFFFAOYSA-N ZrO2 Inorganic materials O=[Zr]=O MCMNRKCIXSYSNV-UHFFFAOYSA-N 0.000 description 10
- 238000005259 measurement Methods 0.000 description 6
- RVTZCBVAJQQJTK-UHFFFAOYSA-N oxygen(2-);zirconium(4+) Chemical compound [O-2].[O-2].[Zr+4] RVTZCBVAJQQJTK-UHFFFAOYSA-N 0.000 description 6
- 238000005516 engineering process Methods 0.000 description 5
- -1 oxygen ions Chemical class 0.000 description 4
- 239000010409 thin film Substances 0.000 description 3
- 229910045601 alloy Inorganic materials 0.000 description 2
- 239000000956 alloy Substances 0.000 description 2
- 239000000470 constituent Substances 0.000 description 2
- 239000010408 film Substances 0.000 description 2
- 239000011521 glass Substances 0.000 description 2
- 239000010970 precious metal Substances 0.000 description 2
- 229910001020 Au alloy Inorganic materials 0.000 description 1
- QCWXUUIWCKQGHC-UHFFFAOYSA-N Zirconium Chemical compound [Zr] QCWXUUIWCKQGHC-UHFFFAOYSA-N 0.000 description 1
- 239000000853 adhesive Substances 0.000 description 1
- 230000001070 adhesive effect Effects 0.000 description 1
- PNEYBMLMFCGWSK-UHFFFAOYSA-N aluminium oxide Inorganic materials [O-2].[O-2].[O-2].[Al+3].[Al+3] PNEYBMLMFCGWSK-UHFFFAOYSA-N 0.000 description 1
- 238000004458 analytical method Methods 0.000 description 1
- 230000001419 dependent effect Effects 0.000 description 1
- 238000003487 electrochemical reaction Methods 0.000 description 1
- 238000004868 gas analysis Methods 0.000 description 1
- 239000003353 gold alloy Substances 0.000 description 1
- 229910000449 hafnium oxide Inorganic materials 0.000 description 1
- WIHZLLGSGQNAGK-UHFFFAOYSA-N hafnium(4+);oxygen(2-) Chemical compound [O-2].[O-2].[Hf+4] WIHZLLGSGQNAGK-UHFFFAOYSA-N 0.000 description 1
- 150000002500 ions Chemical class 0.000 description 1
- 239000012528 membrane Substances 0.000 description 1
- 230000003647 oxidation Effects 0.000 description 1
- 238000007254 oxidation reaction Methods 0.000 description 1
- TWNQGVIAIRXVLR-UHFFFAOYSA-N oxo(oxoalumanyloxy)alumane Chemical compound O=[Al]O[Al]=O TWNQGVIAIRXVLR-UHFFFAOYSA-N 0.000 description 1
- SIWVEOZUMHYXCS-UHFFFAOYSA-N oxo(oxoyttriooxy)yttrium Chemical compound O=[Y]O[Y]=O SIWVEOZUMHYXCS-UHFFFAOYSA-N 0.000 description 1
- 238000000059 patterning Methods 0.000 description 1
- 238000007650 screen-printing Methods 0.000 description 1
- 230000035945 sensitivity Effects 0.000 description 1
- 229910052726 zirconium Inorganic materials 0.000 description 1
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
- G01N27/4073—Composition or fabrication of the solid electrolyte
- G01N27/4074—Composition or fabrication of the solid electrolyte for detection of gases other than oxygen
-
- 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
- G01N27/4075—Composition or fabrication of the electrodes and coatings thereon, e.g. catalysts
-
- 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
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N33/00—Investigating or analysing materials by specific methods not covered by groups G01N1/00 - G01N31/00
- G01N33/0004—Gaseous mixtures, e.g. polluted air
- G01N33/0009—General constructional details of gas analysers, e.g. portable test equipment
- G01N33/0027—General constructional details of gas analysers, e.g. portable test equipment concerning the detector
- G01N33/0036—General constructional details of gas analysers, e.g. portable test equipment concerning the detector specially adapted to detect a particular component
- G01N33/0037—NOx
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02A—TECHNOLOGIES FOR ADAPTATION TO CLIMATE CHANGE
- Y02A50/00—TECHNOLOGIES FOR ADAPTATION TO CLIMATE CHANGE in human health protection, e.g. against extreme weather
- Y02A50/20—Air quality improvement or preservation, e.g. vehicle emission control or emission reduction by using catalytic converters
Definitions
- the present invention relates to the measurement of undesirable gases in the exhaust gas of internal combustion engines or incinerators, a related use of oxygen pumps and suitable sensors.
- oxygen pumps are based on an electrochemical reaction of zirconium dioxide between two electrodes.
- This device is capable of transporting oxygen from one side of a zirconia wall via its reduction to oxygen ions at the cathode, ion migration of the oxygen ions in ZrO 2 and oxidation of the oxygen ions to oxygen at the anode to the other side. In this way, a different partial pressure on the two sides can be achieved.
- the object of the present invention is to integrate a reliable exhaust gas analysis, in particular NO x measurement, in a simple manner in internal combustion engines or incinerators.
- an ion conductor or an oxygen pump in particular a material pairing of noble metal electrodes and zirconium dioxide which surrounds a cavity, which is preferably stabilized with yttrium oxide or hafnium oxide, is used in a limited temperature range gas-sensitive, in particular NO x -sensitive for at least one environmentally polluting exhaust gas component. in particular NO x .
- an ion conductor is used in the measurement of gas components.
- the ion conductor is part of an oxygen pump.
- the gas sensor or the oxygen pump has a membrane arranged between electrodes on an ion conductor, in particular ZrO 2 .
- only one ion conductor is required, the electrodes of which can be produced together with a large number of "covers" on a plate which is separated after the electrodes have been produced.
- a significant field of application for such sensors is the measurement of exhaust gas constituents.
- the functionality of sensors is preferably protected from being affected by hot exhaust gases, in particular by arranging the sensor in a gas-permeable housing. This allows the permanent determination of NO x in exhaust gases from internal combustion engines or incinerators.
- Inventive sensors can be mounted directly in the exhaust duct.
- a gas-sensitive, in particular NO x -sensitiver sensor which contains an ion conductor or an oxygen pump, the outer precious metal electrode in addition to platinum according to the invention at least 20 wt .-%, in particular at least 30 wt .-% of another noble metal.
- the other noble metal is selected from the group consisting of gold, silver, palladium, rhodium and ruthenium.
- at least one further precious metal consists of the elements gold, silver or ruthenium.
- the platinum content is at least 5 wt .-%, in particular 10 to 30 wt .-%.
- a gold-based alloy with 10 to 30% by weight of platinum and 5 to 15% by weight of rhodium has proved suitable.
- An electrochemical oxygen pump has between the atmosphere to be examined and a space separated therefrom an oxygen ion conductor which reduces gaseous oxygen at the cathode by a potential difference between two electrodes and oxidizes oxygen ions at the anode.
- an oxygen ion conductor which reduces gaseous oxygen at the cathode by a potential difference between two electrodes and oxidizes oxygen ions at the anode.
- the outer electrode is gas sensitive by additional noble metals in addition to platinum in certain temperature ranges for gases other than oxygen, in particular in the exhaust undesirable components, such as NO x .
- a gas sensor is designed as a chip.
- porous electrodes are arranged on an oxygen ion conductor substrate such as ZrO 2 , in particular in thick-film technology.
- the oxygen conductor substrate is z. B. with Y 2 O 3 - or HfO 2 -stabilized ZrO 2 on a ceramic substrate, for. B. AI 2 O 3 adhered to its edges, z.
- a sensitive chip for unwanted exhaust gas components is provided according to the invention, in particular for the determination of NO x .
- the chip preferably has a heating resistor.
- the heating resistor is arranged on an electrically insulating substrate, in particular high-purity aluminum oxide.
- the heating resistor is preferably produced by thin-film technology.
- the electrodes, between which the ion conductor, in particular a zirconium dioxide plate, is arranged, are produced by a known method for the production of porous electrodes, e.g. B. in thick-film technology or after special thin-film technology.
- the chip is provided as an SMD or flip-chip component.
- the dimensions of such a chip consisting of the electrically insulating substrate, in particular a ceramic substrate with oxygen pump arranged thereon, are less than 5 mm.
- the cavity located between the ceramic substrate and the oxygen ion conductor is preferably less than 1 mm 3 , in particular less than 1/100 mm 3 .
- the gas-sensitive chip has a temperature sensor.
- Ceramic plate is spaced, has proven to be the oxygen pump of the chip.
- the zirconium dioxide plate has on one side an electrode arranged in the cavity of noble metal, in particular platinum, and an outer electrode, which in addition to platinum has at least one further noble metal, in particular gold.
- the base is a substrate with electrically insulating surface, such.
- Figure 1 is a plate of alumina.
- the plate is coated with a heating resistor, which can be applied by thin-film technology.
- the heating resistor is arranged here outside of walls, which conclude with a cover of an ion conductor, here zirconia, and the substrate surface a space.
- metallically conductive electrodes are arranged, of which two are designed as platinum electrodes in FIG.
- the designated as a mixing electrode electrode consists of a noble metal alloy, which has gold and platinum.
- the electrodes are so porous that they are permeable to oxygen. For this purpose, they are preferably applied by screen printing.
- a plurality of zirconium flakes are co-produced by patterning a large substrate of zirconium dioxide with electrodes, to be singulated and then affixed to or between walls on the substrate.
- the sensor can then be connected for the measurement according to FIG.
- Figures 2 and 3 show measuring cycles relating to the electrical connections and the pressure change in the enclosed space.
Landscapes
- Chemical & Material Sciences (AREA)
- Life Sciences & Earth Sciences (AREA)
- Health & Medical Sciences (AREA)
- Physics & Mathematics (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Electrochemistry (AREA)
- Molecular Biology (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)
- Measuring Oxygen Concentration In Cells (AREA)
Abstract
Description
Claims
Priority Applications (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
EP10005986A EP2226628A1 (de) | 2007-10-05 | 2008-10-02 | Gassensor |
EP10006033A EP2226629A1 (de) | 2007-10-05 | 2008-10-02 | Gassensor enthaltend ein Festelektrolytplättchen und drei poröse metallische Elektroden |
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE102007048049A DE102007048049A1 (de) | 2007-10-05 | 2007-10-05 | Verwendung eines Ionenleiters für einen Gassensor |
PCT/EP2008/008343 WO2009046927A2 (de) | 2007-10-05 | 2008-10-02 | Verwendung eines einzelnen ionenleiters für einen gassensor |
Publications (1)
Publication Number | Publication Date |
---|---|
EP2195647A2 true EP2195647A2 (de) | 2010-06-16 |
Family
ID=40220230
Family Applications (3)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP10006033A Withdrawn EP2226629A1 (de) | 2007-10-05 | 2008-10-02 | Gassensor enthaltend ein Festelektrolytplättchen und drei poröse metallische Elektroden |
EP08837966A Withdrawn EP2195647A2 (de) | 2007-10-05 | 2008-10-02 | Verwendung eines ionenleiters für einen gassensor |
EP10005986A Withdrawn EP2226628A1 (de) | 2007-10-05 | 2008-10-02 | Gassensor |
Family Applications Before (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP10006033A Withdrawn EP2226629A1 (de) | 2007-10-05 | 2008-10-02 | Gassensor enthaltend ein Festelektrolytplättchen und drei poröse metallische Elektroden |
Family Applications After (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP10005986A Withdrawn EP2226628A1 (de) | 2007-10-05 | 2008-10-02 | Gassensor |
Country Status (3)
Country | Link |
---|---|
EP (3) | EP2226629A1 (de) |
DE (1) | DE102007048049A1 (de) |
WO (1) | WO2009046927A2 (de) |
Families Citing this family (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE102013210903A1 (de) * | 2013-06-11 | 2014-12-11 | Heraeus Sensor Technology Gmbh | Gassensor zur Messung unterschiedlicher Gase und dazugehöriges Herstellungsverfahren |
DE102016210936A1 (de) * | 2016-06-20 | 2017-12-21 | Siemens Aktiengesellschaft | Gassensor |
DE102016115183A1 (de) * | 2016-08-16 | 2018-02-22 | Heraeus Sensor Technology Gmbh | Poröses Material, Pulver zur Herstellung eines porösen Materials, Verfahren zur Herstellung eines porösen Materials und Bauteil |
EP3783355A1 (de) | 2019-08-21 | 2021-02-24 | Siemens Aktiengesellschaft | Verfahren und sensorvorrichtung zur bestimmung des gaspartialdrucks |
Family Cites Families (15)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE68917856T2 (de) * | 1988-10-31 | 1995-04-06 | Fujikura Ltd | Sauerstoffsensorvorrichtung. |
DE4109516C2 (de) * | 1991-01-30 | 1997-08-07 | Roth Technik Gmbh | Vorrichtung zum kontinuierlichen Überwachen der Konzentrationen von gasförmigen Bestandteilen in Gasgemischen |
KR960024356A (ko) * | 1994-12-26 | 1996-07-20 | 이형도 | 광역공연비 센서 및 이의 구동방법 |
DE19651328B4 (de) * | 1996-12-11 | 2007-07-26 | Dittrich, Jürgen | Gassensor |
JP2001505311A (ja) * | 1997-09-15 | 2001-04-17 | ヘレウス エレクトロナイト インタナショナル エヌ.ヴィー. | ガスセンサ |
JP3874947B2 (ja) * | 1997-12-01 | 2007-01-31 | 日本碍子株式会社 | 二酸化硫黄ガスセンサ |
JP3701114B2 (ja) * | 1997-12-22 | 2005-09-28 | 日本碍子株式会社 | NOx分解電極の酸化防止方法 |
JP2000065789A (ja) * | 1998-08-25 | 2000-03-03 | Ngk Insulators Ltd | 一酸化炭素センサとその作製方法及び使用方法 |
JP2003083936A (ja) * | 2001-06-25 | 2003-03-19 | Denso Corp | ガスセンサ素子 |
GB2387230B (en) * | 2002-02-28 | 2005-12-21 | Ngk Spark Plug Co | Prismatic ceramic heater for heating gas sensor element, prismatic gas sensor element in multi-layered structure including the prismatic ceramic heater, |
DE10216724C1 (de) * | 2002-04-16 | 2003-10-09 | Bosch Gmbh Robert | Verfahren zum Betreiben einer Breitband-Lamdasonde |
JP4248265B2 (ja) * | 2003-02-03 | 2009-04-02 | 株式会社デンソー | ガスセンサ素子 |
DE10313064A1 (de) * | 2003-03-24 | 2004-10-28 | Webasto Thermosysteme Gmbh | Gassensor und Verfahren zur Herstellung eines Gassensors |
JP4511160B2 (ja) * | 2003-11-27 | 2010-07-28 | 日本碍子株式会社 | ガスセンサ |
US7967964B2 (en) * | 2007-02-27 | 2011-06-28 | Honeywell International Inc. | Single cell sensor for measuring the partial pressure of oxygen |
-
2007
- 2007-10-05 DE DE102007048049A patent/DE102007048049A1/de not_active Withdrawn
-
2008
- 2008-10-02 WO PCT/EP2008/008343 patent/WO2009046927A2/de active Application Filing
- 2008-10-02 EP EP10006033A patent/EP2226629A1/de not_active Withdrawn
- 2008-10-02 EP EP08837966A patent/EP2195647A2/de not_active Withdrawn
- 2008-10-02 EP EP10005986A patent/EP2226628A1/de not_active Withdrawn
Non-Patent Citations (1)
Title |
---|
See references of WO2009046927A2 * |
Also Published As
Publication number | Publication date |
---|---|
WO2009046927A2 (de) | 2009-04-16 |
WO2009046927A3 (de) | 2009-05-28 |
DE102007048049A1 (de) | 2009-04-16 |
EP2226629A1 (de) | 2010-09-08 |
EP2226628A1 (de) | 2010-09-08 |
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RIN1 | Information on inventor provided before grant (corrected) |
Inventor name: GUTH, ULRICH Inventor name: SCHOENAUER, ULRICH Inventor name: DITTRICH, JUERGEN Inventor name: ASMUS, TIM Inventor name: ULLRICH, KARLHEINZ Inventor name: WIENAND, KARLHEINZ Inventor name: TURWITT, MARTIN |
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17Q | First examination report despatched |
Effective date: 20101028 |
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18D | Application deemed to be withdrawn |
Effective date: 20150501 |