CN110121642A - For sensing the sensor element of the particle of the measurement gas in measurement gas compartment - Google Patents
For sensing the sensor element of the particle of the measurement gas in measurement gas compartment Download PDFInfo
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- CN110121642A CN110121642A CN201780081458.6A CN201780081458A CN110121642A CN 110121642 A CN110121642 A CN 110121642A CN 201780081458 A CN201780081458 A CN 201780081458A CN 110121642 A CN110121642 A CN 110121642A
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- weight percent
- measurement gas
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- 238000005259 measurement Methods 0.000 title claims abstract description 35
- 239000002245 particle Substances 0.000 title claims abstract description 18
- 229910052751 metal Inorganic materials 0.000 claims abstract description 43
- 239000002184 metal Substances 0.000 claims abstract description 42
- 239000007772 electrode material Substances 0.000 claims abstract description 33
- KDLHZDBZIXYQEI-UHFFFAOYSA-N Palladium Chemical compound [Pd] KDLHZDBZIXYQEI-UHFFFAOYSA-N 0.000 claims abstract description 22
- 239000010948 rhodium Substances 0.000 claims abstract description 14
- 229910052741 iridium Inorganic materials 0.000 claims abstract description 11
- GKOZUEZYRPOHIO-UHFFFAOYSA-N iridium atom Chemical compound [Ir] GKOZUEZYRPOHIO-UHFFFAOYSA-N 0.000 claims abstract description 11
- 229910052703 rhodium Inorganic materials 0.000 claims abstract description 10
- MHOVAHRLVXNVSD-UHFFFAOYSA-N rhodium atom Chemical compound [Rh] MHOVAHRLVXNVSD-UHFFFAOYSA-N 0.000 claims abstract description 10
- KJTLSVCANCCWHF-UHFFFAOYSA-N Ruthenium Chemical compound [Ru] KJTLSVCANCCWHF-UHFFFAOYSA-N 0.000 claims abstract description 9
- 229910052763 palladium Inorganic materials 0.000 claims abstract description 9
- 229910052707 ruthenium Inorganic materials 0.000 claims abstract description 9
- BASFCYQUMIYNBI-UHFFFAOYSA-N platinum Chemical compound [Pt] BASFCYQUMIYNBI-UHFFFAOYSA-N 0.000 claims description 21
- 239000000919 ceramic Substances 0.000 claims description 16
- 238000000034 method Methods 0.000 claims description 14
- 239000000654 additive Substances 0.000 claims description 10
- 230000000996 additive effect Effects 0.000 claims description 10
- 229910052697 platinum Inorganic materials 0.000 claims description 9
- 238000004519 manufacturing process Methods 0.000 claims description 7
- 238000000151 deposition Methods 0.000 claims description 5
- 229910017052 cobalt Inorganic materials 0.000 claims description 4
- 239000010941 cobalt Substances 0.000 claims description 4
- GUTLYIVDDKVIGB-UHFFFAOYSA-N cobalt atom Chemical compound [Co] GUTLYIVDDKVIGB-UHFFFAOYSA-N 0.000 claims description 4
- 239000010931 gold Substances 0.000 claims description 4
- 239000011159 matrix material Substances 0.000 claims description 3
- 229910052702 rhenium Inorganic materials 0.000 claims description 3
- WUAPFZMCVAUBPE-UHFFFAOYSA-N rhenium atom Chemical compound [Re] WUAPFZMCVAUBPE-UHFFFAOYSA-N 0.000 claims description 3
- 229910052727 yttrium Inorganic materials 0.000 claims description 3
- VWQVUPCCIRVNHF-UHFFFAOYSA-N yttrium atom Chemical compound [Y] VWQVUPCCIRVNHF-UHFFFAOYSA-N 0.000 claims description 3
- ZSLUVFAKFWKJRC-IGMARMGPSA-N 232Th Chemical compound [232Th] ZSLUVFAKFWKJRC-IGMARMGPSA-N 0.000 claims description 2
- BQCADISMDOOEFD-UHFFFAOYSA-N Silver Chemical compound [Ag] BQCADISMDOOEFD-UHFFFAOYSA-N 0.000 claims description 2
- 229910052776 Thorium Inorganic materials 0.000 claims description 2
- PCHJSUWPFVWCPO-UHFFFAOYSA-N gold Chemical compound [Au] PCHJSUWPFVWCPO-UHFFFAOYSA-N 0.000 claims description 2
- 229910052737 gold Inorganic materials 0.000 claims description 2
- 229910052746 lanthanum Inorganic materials 0.000 claims description 2
- FZLIPJUXYLNCLC-UHFFFAOYSA-N lanthanum atom Chemical compound [La] FZLIPJUXYLNCLC-UHFFFAOYSA-N 0.000 claims description 2
- 229910052709 silver Inorganic materials 0.000 claims description 2
- 239000004332 silver Substances 0.000 claims description 2
- QCWXUUIWCKQGHC-UHFFFAOYSA-N Zirconium Chemical compound [Zr] QCWXUUIWCKQGHC-UHFFFAOYSA-N 0.000 claims 1
- 229910052726 zirconium Inorganic materials 0.000 claims 1
- 239000007789 gas Substances 0.000 description 43
- 229910045601 alloy Inorganic materials 0.000 description 15
- 239000000956 alloy Substances 0.000 description 15
- 239000000463 material Substances 0.000 description 12
- 239000000203 mixture Substances 0.000 description 9
- 238000005260 corrosion Methods 0.000 description 7
- 230000007797 corrosion Effects 0.000 description 7
- 239000006229 carbon black Substances 0.000 description 5
- 230000006641 stabilisation Effects 0.000 description 5
- 238000011105 stabilization Methods 0.000 description 5
- 238000002485 combustion reaction Methods 0.000 description 4
- 231100000572 poisoning Toxicity 0.000 description 4
- 230000000607 poisoning effect Effects 0.000 description 4
- 230000008569 process Effects 0.000 description 4
- 229910001260 Pt alloy Inorganic materials 0.000 description 3
- 229910052729 chemical element Inorganic materials 0.000 description 3
- 239000004020 conductor Substances 0.000 description 3
- 230000005611 electricity Effects 0.000 description 3
- 125000002887 hydroxy group Chemical group [H]O* 0.000 description 3
- 229910000765 intermetallic Inorganic materials 0.000 description 3
- 239000008188 pellet Substances 0.000 description 3
- 238000011084 recovery Methods 0.000 description 3
- 230000008901 benefit Effects 0.000 description 2
- 239000003054 catalyst Substances 0.000 description 2
- 229910010293 ceramic material Inorganic materials 0.000 description 2
- 238000010276 construction Methods 0.000 description 2
- 239000012777 electrically insulating material Substances 0.000 description 2
- 238000010438 heat treatment Methods 0.000 description 2
- MRELNEQAGSRDBK-UHFFFAOYSA-N lanthanum oxide Inorganic materials [O-2].[O-2].[O-2].[La+3].[La+3] MRELNEQAGSRDBK-UHFFFAOYSA-N 0.000 description 2
- 239000007769 metal material Substances 0.000 description 2
- 230000009467 reduction Effects 0.000 description 2
- 238000005245 sintering Methods 0.000 description 2
- 239000000758 substrate Substances 0.000 description 2
- 238000004804 winding Methods 0.000 description 2
- GWEVSGVZZGPLCZ-UHFFFAOYSA-N Titan oxide Chemical compound O=[Ti]=O GWEVSGVZZGPLCZ-UHFFFAOYSA-N 0.000 description 1
- 238000009825 accumulation Methods 0.000 description 1
- 230000006978 adaptation Effects 0.000 description 1
- 239000004411 aluminium Substances 0.000 description 1
- 229910052782 aluminium Inorganic materials 0.000 description 1
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 description 1
- 238000004458 analytical method Methods 0.000 description 1
- 238000000429 assembly Methods 0.000 description 1
- 230000000712 assembly Effects 0.000 description 1
- JRPBQTZRNDNNOP-UHFFFAOYSA-N barium titanate Chemical compound [Ba+2].[Ba+2].[O-][Ti]([O-])([O-])[O-] JRPBQTZRNDNNOP-UHFFFAOYSA-N 0.000 description 1
- 229910002113 barium titanate Inorganic materials 0.000 description 1
- 230000003197 catalytic effect Effects 0.000 description 1
- 230000008859 change Effects 0.000 description 1
- 238000004140 cleaning Methods 0.000 description 1
- 238000000576 coating method Methods 0.000 description 1
- 239000013078 crystal Substances 0.000 description 1
- 238000005520 cutting process Methods 0.000 description 1
- 230000008021 deposition Effects 0.000 description 1
- 239000000428 dust Substances 0.000 description 1
- 238000009713 electroplating Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 230000008020 evaporation Effects 0.000 description 1
- 238000001704 evaporation Methods 0.000 description 1
- 239000004744 fabric Substances 0.000 description 1
- 230000001815 facial effect Effects 0.000 description 1
- 239000008187 granular material Substances 0.000 description 1
- 230000033444 hydroxylation Effects 0.000 description 1
- 238000005805 hydroxylation reaction Methods 0.000 description 1
- 239000004615 ingredient Substances 0.000 description 1
- 238000002955 isolation Methods 0.000 description 1
- 230000007246 mechanism Effects 0.000 description 1
- 229910001092 metal group alloy Inorganic materials 0.000 description 1
- 238000012544 monitoring process Methods 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
- RVTZCBVAJQQJTK-UHFFFAOYSA-N oxygen(2-);zirconium(4+) Chemical compound [O-2].[O-2].[Zr+4] RVTZCBVAJQQJTK-UHFFFAOYSA-N 0.000 description 1
- 229910052573 porcelain Inorganic materials 0.000 description 1
- 238000007650 screen-printing Methods 0.000 description 1
- VSZWPYCFIRKVQL-UHFFFAOYSA-N selanylidenegallium;selenium Chemical compound [Se].[Se]=[Ga].[Se]=[Ga] VSZWPYCFIRKVQL-UHFFFAOYSA-N 0.000 description 1
- 238000004544 sputter deposition Methods 0.000 description 1
- ZCUFMDLYAMJYST-UHFFFAOYSA-N thorium dioxide Chemical compound O=[Th]=O ZCUFMDLYAMJYST-UHFFFAOYSA-N 0.000 description 1
- 229910003452 thorium oxide Inorganic materials 0.000 description 1
- OGIDPMRJRNCKJF-UHFFFAOYSA-N titanium oxide Inorganic materials [Ti]=O OGIDPMRJRNCKJF-UHFFFAOYSA-N 0.000 description 1
- 229910001928 zirconium oxide Inorganic materials 0.000 description 1
Classifications
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N15/00—Investigating characteristics of particles; Investigating permeability, pore-volume or surface-area of porous materials
- G01N15/06—Investigating concentration of particle suspensions
- G01N15/0656—Investigating concentration of particle suspensions using electric, e.g. electrostatic methods or magnetic methods
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
- F01N—GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR MACHINES OR ENGINES IN GENERAL; GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR INTERNAL COMBUSTION ENGINES
- F01N2560/00—Exhaust systems with means for detecting or measuring exhaust gas components or characteristics
- F01N2560/05—Exhaust systems with means for detecting or measuring exhaust gas components or characteristics the means being a particulate sensor
Landscapes
- Chemical & Material Sciences (AREA)
- Dispersion Chemistry (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)
- Measuring Oxygen Concentration In Cells (AREA)
- Investigating Or Analyzing Materials By The Use Of Electric Means (AREA)
Abstract
The present invention proposes a kind of for sensing the sensor element (110) of the particle of the measurement gas in measurement gas compartment.The sensor element (110) includes at least one carrier (114), wherein, at least one first electrode device (116) and at least one second electrode device (118) are applied on the carrier (114).The first electrode device (116) and the second electrode device (118) are respectively provided at least one electrode finger (120).At least one of the electrode finger (120) is arranged for having electrode material (126) by the surface (124) of measurement gas (112) load, the electrode material includes the parent metal of at least 50% weight percent, which selects from the group comprising palladium, iridium, ruthenium and rhodium.
Description
Technical field
It is known from the state of the art a variety of for sensing the sensor element of the particle of the measurement gas in measurement gas compartment.It surveys
Amount gas is, for example, the exhaust gas of internal combustion engine.Particle especially can be carbon black or dust granule.Do not limiting other embodiment party below
The present invention is described specifically referring to the sensor element for detecting carbon black pellet in the case where formula and application.
Background technique
Two or more metal electrodes may be mounted on electrical isolation carrier.Exist under stress or also there
Particle, the especially carbon black pellet gathered in stressless situation forms in the collection phase of sensor element and is for example configured as that
Conducting bridge between the electrode of the chimeric interdigital electrode of this pectination and thus make the electric pole short circuit.In recovery phase, electricity
Extremely self-cleaning burning usually is carried out by integrated heating element.In general, particle sensor analysis processing electrode structure due to
Particle accumulation and the electrical characteristics changed.Such as the resistance of reduction or the electricity of increase can be measured in the case where voltage constant application
Stream.
Resistance sensor is commonly known as according to the sensor element that the principle works and is present in multiple embodiment party
In formula, such as by 103 19 664 10 2,004 046 882 10 2,006 042 362 A1, DE 103 of A1, DE of A1, DE of DE
53 860 A1, DE 101 49 333 are known to A1 and 2003/006976 A2 of WO.It is configured as the sensor member of carbon black sensor
Part is commonly used in monitoring diesel particulate filter.In the gas exhaust piping of internal combustion engine, the particle sensor of the type is usually connect
It receives in protection pipe, which for example allows exhaust gas to flow through particle sensor simultaneously.
The metal surface of the electrode of sensor element directly and unprotectedly is exposed to internal combustion with determining by function
The exhaust gas of machine at high operating temperatures.In order to realize the quality as high as possible of sensor element, electrode is aoxidizing at high temperature
Premise is important with the durability under conditions of reduction and especially anti-burning property.It is observed in the service life of this sensor element
In, external electrode is especially extrahazardous in collection phase or quickly burning for recovery phase.Due to being configured as pectination each other
The limitation of the depth-width ratio of the fine structure and electrode finger of the electrode of chimeric interdigital electrode determined by manufacture, small loss is
It can lead to the peeling of electrode surface, this may cause the error running of sensor element or even causes out of service.
102008042770 A1 of DE discloses a kind of conductive layer for electrochemical gas sensor, the conductive layer packet
Include metal and ceramic composition, wherein metal component has metal alloy.Especially for reducing due to chemically or physically process such as gas
Change or formed it is volatile, for example in material caused by the metallic compound of hydroxyl or oxide form peel off and at the same time being
Improve resisting poisoning and corrosion resistance and also improve in this way relative to reactive exhaust gas, putty or exhaust gas catalyst component
The signal stabilization of the electrode of implementation, metal component can be formed by platinum or platinum alloy.Here, it is particularly advantageous that platinum closes
Gold contains rhodium and/or palladium, the gross mass component with 5 to 10% weight percent in platinum alloy, or contains iridium, ruthenium
And/or cobalt, the gross mass component with most 5% weight percent in platinum alloy.
Although the sensor element for sensing particles being known from the state of the art has the advantage that, these sensor elements
Still have and improves potentiality.
Summary of the invention
Therefore, within the framework of the invention, propose a kind of for sensing the particle of the measurement gas in measurement gas compartment
Sensor element.Within the framework of the invention, sensor element be interpreted as be suitable for qualitatively and/or quantitatively sensing particles and
Such as it can produce any device of the electric measurement signal corresponding to the particle sensed, such as voltage or electric current.
Sensor element especially can be set into in a motor vehicle.Measurement gas especially can be the exhaust gas of motor vehicle.
Other gases and other mixtures are also possible in principle.Measurement gas compartment can be arbitrary in principle, is open or close
The room of conjunction, receive has measurement gas and/or the room to be flowed through by measurement gas in the chamber.Measurement gas compartment for example can be internal combustion
The exhaust pipe of machine, such as combustion-type motor.
Sensor element includes at least one carrier, wherein be applied on carrier at least one first electrode device and
At least one second electrode device.First electrode device and second electrode device are respectively provided at least one electrode finger.In this hair
In bright frame, carrier is interpreted as following arbitrary substrate in principle, which is suitable for carrying first electrode device and second
Electrode assembly and/or it can be applied with first electrode device and second electrode device over the substrate.
Within the framework of the invention, electrode assembly is interpreted as following electric conductor, the electric conductor be suitable for current measurement and/or
At least one element that voltage measurement and/or the electric conductor can give electrode assembly contact is loaded with voltage and or current.
Within the framework of the invention, concept " electrode finger " is interpreted as the following arbitrary form of electrode assembly in principle, and the form is at one
Size in dimension significantly more than, for example, at least with coefficient 2, preferably at least with coefficient 3, be particularly preferably at least more than with coefficient 5
Size at least another dimension.
Carrier may include at least one electrically insulating material, especially at least a ceramic material.Carrier has at least one
Carrier surface.Within the framework of the invention, carrier surface is interpreted as following random layer in principle, which makes carrier and ring around it
Border separates, and the first and second electrode assemblies of sensor element are applied on this layer.
First electrode device and second electrode device can be respectively provided at least two electrode fingers.First electrode device is extremely
Few two electrode fingers and at least two electrode fingers of second electrode device can be fitted into each other.The electrode finger of first electrode device and
The electrode finger of second electrode device especially can be fitted into pectination each other.In addition, first electrode device and second electrode device can
To have the structure selected from the group being made of herring-bone form structure, laciniation and winding construction.
The cross-sectional profiles of electrode finger can be rectangle or trapezoidal.Within the framework of the invention, electrode finger is transversal
What facial contour was interpreted as electrode finger can be perpendicular to the edge contour of the main extending direction of electrode finger.Cross-sectional profiles for example may be used
To be the profile in cutting plane, which can be perpendicular to the extending direction and perpendicular to carrier surface cloth of electrode finger
It sets.
The present invention proposes that at least one of electrode finger is arranged for being had especially by the surface of measurement gas-loaded in conjunction
The electrode material of golden form, the electrode material include at least 50% weight percent, preferably at least 55% weight percent, into one
Walk preferably at least 60% weight percent, further preferably at least 65% weight percent, further preferably at least 70% weight
Percentage, further preferably at least 75% weight percent and preferably up to 95% weight percent, further preferred highest
90% weight percent, 85% weight percent of further preferred highest, 80% weight percent of further preferred highest base
Body metal.
Therefore, at least one electrode finger described herein can have the volume being made of completely the electrode material.It replaces
Dai Di can be enough according to the configuration of sensor element and sensor element depending on measuring the arrangement in gas stream, electricity
What pole referred to is at least arranged for having the electrode material by the surface of measurement gas-loaded.Other configuration is possible
, especially following configuration: on the sensor element be loaded first due to its space layout on carrier with measure
That electrode finger of gas has the volume that is made of completely the electrode material, and on the sensor element since it is carrying
Space layout on body and be finally loaded to measure that electrode finger of gas and only there is in its surface the electrode material
Material, and remaining volume of subsequent electrode finger can have different compositions, conductive metal materials.
Herein, the concept of parent metal shows appointing at least 50% weight percent comprising alloy of alloy in principle
Meaning metal component, that is, for parent metal in the alloy with the presence of following component, which is equivalent to the component of remaining component of alloy
And more than alloy remaining component component sum.Within a context, the concept of alloy shows there is at least two bands
There is the material of the different chemical elements of metalline, wherein this at least two different chemical element is present in alloy in this way,
So that alloy equally has metalline.The concept of metalline is related to the metallic character of material in principle, and the metallic character is outstanding
It shows as existing simultaneously high conductivity, high-termal conductivity, good ductility and high-fire resistance in the material.
Especially for reduce due to chemically or physically process, such as gasify or formed it is volatile, for example in hydroxyl or oxidation
Material caused by the metallic compound of object form peels off and in order to improve simultaneously relative to reactive exhaust gas, putty or exhaust gas
The signal stabilization for resisting poisoning and corrosion resistance and also improving the electrode being implemented of catalytic component, parent metal by
It is selected in group comprising palladium (Pd), iridium (Ir), ruthenium (Ru) and rhodium (Rh).Therefore, parent metal especially do not have metallic element
Platinum (Pt).Electrode at least one of described matrix metal, especially iridium and rhodium, which is proved, burns mechanism in different
Aspect is more advantageous than the electrode that parent metal includes platinum.
As have been described above, electrode material preferably may include alloy, and the alloy is other than parent metal
Additionally there is at least one other component.In particularly preferred configuration, electrode material adds other than parent metal
Ground includes at least one other metal, which selects from following chemical element: platinum (Pt), rhodium (Rh), ruthenium
(Ru), rhenium (Re), palladium (Pd), cobalt (Co), iridium (Ir), golden (Au) or silver-colored (Ag), wherein the other metal accordingly selected with
Parent metal is different.Preferably, electrode material can have component be 0.5% weight percent, preferably 1% weight percent,
Further preferred 2.5% weight percent, further preferred 5% weight percent, further preferred 7.5% weight percent are straight
To 15% weight percent, preferably of up to 12.5% weight percent, further preferably until described in 10% weight percent
At least one other metal.
In other configurations, electrode material can be attached other than parent metal and at least one described other metal
It include at least one ceramic oxide additive with adding.Herein, the concept of ceramic oxide additive shows to be added to
Alloy and so that alloy is lost any ceramic oxide of its metalline.Following material is referred to as ceramic oxide, institute
Material is stated with ceramic characteristics, the ceramic characteristics are compared to metallic character hardness substantially with higher, corrosion resistance, wear-resistant
Damage property and heat resistance, but brittleness with higher.By reaching ceramic oxide as additive addition in alloy, preferably may be used
To significantly improve the corrosion resistance of electrode, this is more particularly to leading to stabilization of the metal phase on crystal boundary.
Other than selected parent metal, draw especially for additionally reducing due to above-mentioned chemically or physically process
The material risen peels off to be resisted poisoning and corrosion resistance and also improves signal stabilization and at the same time improving, and can be aoxidized from yttrium
Ceramic oxide additive is selected in object, Zirconium oxide, lanthanum-oxides or thorium oxide.Spy expectable for these oxides
Not high corrosion resistance humidification.In addition, from aluminum oxide, titanium oxide, Mn oxide, aluminium titanates and/or barium titanate
The other oxide selected is possible.
In preferred configuration, electrode material can have component be 0% weight percent, preferably 1% weight percent, into
One step preferably 2% weight percent, further preferred 3% weight percent, further preferred 4% weight percent are until 10%
Weight percent, preferably of up to 8% weight percent, further preferably until 6% weight percent, further preferably until
The ceramic oxide additive of 5% weight percent.
Independently with selected ingredient, each data are summed into 100% weight percent of highest, are preferably summed into just
100% weight percent.
Sensor element can especially be configured as carbon black pellet sensor.Therefore, in particularly preferred configuration, sensor
Element can be realized following operation conditions, the operation conditions in recovery phase have 850 DEG C, preferably 950 DEG C, further preferably
1050 DEG C, until 1300 DEG C, especially until 1250 DEG C of temperature.In addition, sensor element may be received at least one protection
Guan Zhong.
In another aspect of the invention, it proposes a kind of for manufacturing for sensing the measurement gas in measurement gas compartment
The method of the sensor element of particle.For this purpose, at least one first electrode device and at least one second electrode device are applied
Onto carrier, wherein first electrode device and second electrode device are respectively provided at least one electrode finger.
According to the method, at least one described electrode finger is at least being arranged on the surface by measurement gas-loaded
With electrode material, which is applied on the carrier of sensor element and/or is applied to by deposition method and deposited
It is in the electrode finger on carrier.
In particularly preferred configuration, electrode material can by means of be known from the state of the art thick bed method, especially borrow
Help silk-screen printing application.Due to the inertia sintering character of parent metal above-mentioned, especially iridium and its alloy, herein
Crystallite dimension and/or the adaptation of ceramic oxide additive can be conducive to by the sintering character of above-mentioned electrode material and according to existing
There is technology, as the platinum as known to 10 2,008 042 770 A1 of DE/platinum ceramic paste is adapted.
In alternate configuration, deposition method can be by thin layer method, especially method for sputtering, evaporation coating method or electro-plating method
Middle selection.However it is equally possible on the application of principle of other deposition method.
The method be particularly useful for manufacturing it is according to the present invention, i.e. according to one of embodiments noted above
Embodiment or according to one of the embodiment described in further detail below embodiment sensor element.Accordingly
Ground, can be largely referring to description as described in the sensor element such as definition and optional configuration.However other structures
Type is also possible in principle.
The sensor element proposed and the method for manufacturing the sensor element proposed are relative to known
Sensor element and the manufacturing method attached have dramatic benefit.
Apply at least to the electrode of the electrode finger of sensor element being arranged on the surface by measurement gas-loaded
Material especially can reduce due to chemically or physically process such as gasify or formed it is volatile, for example in hydroxyl or oxide form
Metallic compound caused by material peel off and at the same time for improve relative to reactive exhaust gas, putty or exhaust gas catalyst
The signal stabilization for resisting poisoning and corrosion resistance and also improving the electrode being implemented of component.
Additionally, the manufacturing method attached can be realized electrode material on the carrier of sensor element and/or
The deposition being present in the electrode finger on carrier.
Detailed description of the invention
Other optional details and feature of the invention are by the following description to the preferred embodiment schematically shown in attached drawing
It obtains.
Attached drawing is shown:
The top view of the embodiment of Fig. 1 sensor of the invention element；With
The viewgraph of cross-section of the embodiment of the electrode finger of the sensor element of Fig. 2 Fig. 1.
Specific embodiment
Fig. 1 illustrates particle according to the present invention, for sensing the measurement gas 112 in measurement gas compartment to overlook
The embodiment of sensor element 110.Sensor element 110 is particularly useful for setting in a motor vehicle.It is outstanding to measure gas 112
Its exhaust gas that can be motor vehicle.Sensor element 110 especially may include be not shown in the accompanying drawings it is one or more in addition
Function element, such as electrode, electrode feeder line and contact, multiple layers, heating element, electrochemical cell or other elements, such as upper
Shown in the prior art that face is mentioned.In addition, sensor element 110 for example may be received in same unshowned protection pipe
In.
Sensor element 110 includes at least one carrier 114, wherein at least one first electrode is applied on carrier
Device 116 and at least one second electrode device 118.Carrier 114 especially may include at least one ceramic material.In addition, carrying
Body 114 may include at least one electrically insulating material.Carrier 114 has carrier surface.
First electrode device 116 and second electrode device 118 are respectively provided at least one electrode finger 120.First electrode dress
It sets 116 and second electrode device 118 can be respectively provided with two or (being such as shown in FIG. 1) is respectively provided with more than two electrode
Refer to 120.In addition, as shown in figure 1, the electrode finger 120 of the electrode finger 120 of first electrode device 116 and second electrode device 118 that
This is chimeric.However first electrode device 116 and second electrode device 118 also can have other structure.First electrode device
116 especially can have with second electrode device 118 from by pectinate texture, herring-bone form structure, laciniation and winding construction
The structure selected in the group of composition.
Fig. 2 shows the embodiment of the electrode finger 120 of sensor element 110 with viewgraph of cross-section, wherein electrode finger 120
It is applied on carrier 114.Herein, electrode finger 120 has volume 122 and the surface for being loaded by measurement gas 112 is arranged
124。
The present invention proposes that the volume 122 of electrode finger 120 or the surface 124 of at least electrode finger have especially in alloy form
Electrode material 126, which includes at least base of 50% weight percent and preferably at most 95% weight percent
Body metal, wherein basis material is selected from the following group: palladium (Pd), iridium (Ir), ruthenium (Ru) and rhodium (Rh).
In addition, electrode material 126 other than parent metal can additionally have component be 0.5% weight percent extremely
At least one other metal of 15% weight percent, the other metal is from platinum (Pt), rhodium (Rh), ruthenium (Ru), rhenium
(Re), it is selected in palladium (Pd), cobalt (Co), iridium (Ir), golden (Au) and silver (Ag), wherein selected other metal and institute
The parent metal of selection is different.
In addition, electrode material 126 is other than at least one described parent metal and at least one described other metal
Can additionally have component is ceramic oxide additive of 0% weight percent to 10% weight percent, wherein pottery
Porcelain oxide addition can preferably be selected from the oxide of yttrium (Y), zirconium (Zr), lanthanum (La) or thorium (Th).
In summary, electrode material 126 preferably can have one of the composition in weight percents below, institute
It states composition and is correspondingly summed into 100% weight percent.8 kinds of illustrative compositions are provided below；However it is more according to the present invention
The other composition of kind is possible:
In a preferred embodiment, the volume 122 of electrode finger 120 can be made of electrode material 126 completely.It is substituting
Embodiment in, at least electrode finger 120 is arranged for the surface 124 loaded by measurement gas 112 with electrode material
126.Other embodiments are possible；Especially following implementation, wherein due to its first space on carrier 114
It arranges 128 and is loaded first to measure the volume 122 of that electrode finger 120 of gas 112 completely by 126 groups of electrode material
At, due to its on carrier 114 second space arrangement 130 and be finally loaded to measure that electrode finger 120 of gas 112
Surface 124 there is electrode material 126, and remaining volume of electrode finger 120 in second space arrangement 130 can have not
With composition, conductive metal material.
Claims (10)
1. the sensor element (110) for the particle for sensing the measurement gas (112) in measurement gas compartment, wherein described
Sensor element (110) includes at least one carrier (114), wherein be applied on the carrier (114) at least one first
Electrode assembly (116) and at least one second electrode device (118), wherein the first electrode device (116) and described second
Electrode assembly (118) is respectively provided at least one electrode finger (120), wherein at least one of the electrode finger (120) is arranged to
For having electrode material (126) by the surface (124) of measurement gas (112) load, which includes at least
The parent metal of 50% weight percent, the parent metal are selected from the group comprising palladium, iridium, ruthenium and rhodium.
2. the sensor element according to preceding claims (110), wherein the electrode material (126) includes highest
The described matrix metal of 95% weight percent.
3. sensor element (110) according to any one of the preceding claims, wherein the electrode material (126) is removed
Additionally include at least one other metal except described matrix metal, the other metal from platinum, rhodium, ruthenium, rhenium, palladium,
It is selected in cobalt, iridium, gold or silver.
4. the sensor element according to preceding claims (110), wherein the electrode material (126) is with component
At least one other metal of 0.5% weight percent to 15% weight percent.
5. sensor element (110) according to any one of the preceding claims, wherein the electrode material (126) is attached
It include at least one ceramic oxide additive with adding.
6. the sensor element according to preceding claims (110), wherein the ceramic oxide additive from yttrium, zirconium,
It is selected in the oxide of lanthanum or thorium.
7. the sensor element (110) according to any one of two claims in front, wherein the electrode material
It (126) is the ceramic oxide additive of 0% weight percent to 10% weight percent with component.
8. sensor element (110) according to any one of the preceding claims, wherein at least one described electrode finger
(120) there is the volume (122) being made of completely the electrode material (126).
9. sensor element (110) according to any one of the preceding claims, wherein in the sensor element
(110) in, the first electrode device (116) and the second electrode device (118) are configured as what pectination each other was fitted into respectively
Electrode finger (120).
10. being used to manufacture the sensor element (110) of the particle for sensing the measurement gas (112) in measurement gas compartment
Method, wherein at least one first electrode device (116) and at least one second electrode device (118) are applied to carrier
(114) on, wherein the first electrode device (116) and the second electrode device (118) are respectively provided at least one electrode
Refer to (120), wherein at least one described electrode finger (120) is at least being arranged for by measurement gas (112) load
There are electrode material (126) on surface (124), which includes the parent metal of at least 50% weight percent, the base
By selecting in the group comprising palladium, iridium, ruthenium and rhodium, which is applied body metal by means of deposition method.
Applications Claiming Priority (3)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| DE102016226275.0 | 2016-12-28 | ||
| DE102016226275.0A DE102016226275A1 (en) | 2016-12-28 | 2016-12-28 | Sensor element for detecting particles of a measuring gas in a measuring gas chamber |
| PCT/EP2017/078027 WO2018121905A1 (en) | 2016-12-28 | 2017-11-02 | Sensor element for detecting particles of a measuring gas in a measuring gas chamber |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN110121642A true CN110121642A (en) | 2019-08-13 |
Family
ID=60331588
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201780081458.6A Pending CN110121642A (en) | 2016-12-28 | 2017-11-02 | For sensing the sensor element of the particle of the measurement gas in measurement gas compartment |
Country Status (4)
| Country | Link |
|---|---|
| KR (1) | KR102438819B1 (en) |
| CN (1) | CN110121642A (en) |
| DE (1) | DE102016226275A1 (en) |
| WO (1) | WO2018121905A1 (en) |
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| DE10149333B4 (en) | 2001-10-06 | 2007-06-28 | Robert Bosch Gmbh | Sensor device for measuring the humidity of gases |
| DE10319664A1 (en) | 2003-05-02 | 2004-11-18 | Robert Bosch Gmbh | Particle detection sensor |
| DE10353860B4 (en) | 2003-11-18 | 2023-03-30 | Robert Bosch Gmbh | Sensor for detecting particles in a gas stream and method for its manufacture |
| DE102004046882B4 (en) | 2004-09-28 | 2014-02-06 | Robert Bosch Gmbh | Method for operating an internal combustion engine, and associated computer program, electrical storage medium and control and / or regulating device for detecting a state variable in the exhaust gas of the internal combustion engine |
| JP2009519470A (en) * | 2005-12-12 | 2009-05-14 | ネクステック、マテリアルズ、リミテッド | Ceramic H2S sensor |
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| DE102007047078A1 (en) * | 2007-10-01 | 2009-04-02 | Robert Bosch Gmbh | Sensor element for use in e.g. garage for emission investigation, has protective layers designed congruently to surfaces of electrodes of system, where upper surfaces of electrodes face surfaces of electrodes are arranged on isolation layer |
| DE102008042770A1 (en) | 2008-10-13 | 2010-04-15 | Robert Bosch Gmbh | Material of a cermet layer for electrochemical gas sensors |
| JP5542006B2 (en) * | 2010-08-26 | 2014-07-09 | 日本碍子株式会社 | Particulate matter detector |
| DE102014211782A1 (en) * | 2014-06-18 | 2015-12-24 | Robert Bosch Gmbh | Sensor element for detecting at least one property of a sample gas in a sample gas space |
| KR20160124384A (en) * | 2015-04-17 | 2016-10-27 | 경원산업 주식회사 | Sensor element for sensing particle concentration |
-
2016
- 2016-12-28 DE DE102016226275.0A patent/DE102016226275A1/en active Pending
-
2017
- 2017-11-02 CN CN201780081458.6A patent/CN110121642A/en active Pending
- 2017-11-02 KR KR1020197018620A patent/KR102438819B1/en active IP Right Grant
- 2017-11-02 WO PCT/EP2017/078027 patent/WO2018121905A1/en active Application Filing
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| US9068913B2 (en) * | 2009-05-11 | 2015-06-30 | Heraeus Sensor Technology Gmbh | Photolithographic structured thick layer sensor |
| DE102011006923A1 (en) * | 2011-04-07 | 2012-10-11 | Robert Bosch Gmbh | Device for diagnosing function of collecting particle sensor to determine particle contents in exhaust gas of diesel engine, has particle sensor soot coated with functional layer for converting long chain hydrocarbons |
| DE102014220791A1 (en) * | 2014-10-14 | 2016-04-14 | Robert Bosch Gmbh | Sensor for determining a concentration of particles in a gas stream |
| US10228342B2 (en) * | 2014-12-10 | 2019-03-12 | Denso Corporation | Solid electrolyte body and gas sensor |
Also Published As
| Publication number | Publication date |
|---|---|
| KR20190102195A (en) | 2019-09-03 |
| WO2018121905A1 (en) | 2018-07-05 |
| KR102438819B1 (en) | 2022-09-02 |
| DE102016226275A1 (en) | 2018-06-28 |
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