CN103454329B - Monolithic multilayer structure lambda sensor - Google Patents
Monolithic multilayer structure lambda sensor Download PDFInfo
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- CN103454329B CN103454329B CN201310394474.4A CN201310394474A CN103454329B CN 103454329 B CN103454329 B CN 103454329B CN 201310394474 A CN201310394474 A CN 201310394474A CN 103454329 B CN103454329 B CN 103454329B
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Abstract
The invention discloses monolithic multilayer structure lambda sensor, comprise zirconia sensitive layer, reference gas channel layer, zone of heating, described zirconia sensitive layer upper surface is provided with external electrode, lower surface is provided with interior electrode, it is characterized in that, be provided with between zirconia sensitive layer and reference gas channel layer and regulate different structure layer thermal expansivity, prevent the first Porous transition layer ftractureed between layers, be provided with between reference gas channel layer and zone of heating and regulate different structure layer thermal expansivity, prevent the second Porous transition layer ftractureed between layers, monolithic multilayer structure lambda sensor is arranged in order as zirconia sensitive layer, first Porous transition layer, reference gas channel layer, second Porous transition layer and zone of heating.The inter-laminar stress that Porous transition layer can regulate different structure layer to cause because of thermal expansion, prevents from ftractureing between layers, ensure that the serviceable life of lambda sensor, ensures the stability between different structure layer simultaneously, improves the performance of lambda sensor.
Description
Technical field
The present invention relates to a kind of lambda sensor, particularly relate to monolithic multilayer structure lambda sensor.
Background technology
Automotive oxygen sensor is crucial sensing element in automobile electrically-controlled fuel injection system (EFI), it is a kind of Solid Electrolyte Oxygen Sensor, lambda sensor has a kind of characteristic, at chemically correct fuel A/F(14.7:1) near its export voltage have sudden change, be arranged in automobile exhaust pipe for the oxygen content in measured automobiles emission more, be translated into electric signal, then feed back to and control electricity unit, control module regulates according to the air-fuel ratio A/F of its signal to engine, when actual mixing ratio uprises, in exhaust the concentration of oxygen increase and lambda sensor that state (little electromotive force: O lie prostrate) rare for combination gas notice is controlled electricity is first, when air-fuel ratio is lower than chemically correct fuel, in exhaust, the concentration of oxygen reduces, and lambda sensor controls electricity unit state (large electromotive force: 1 volt) rare for combination gas notice.Its stable output signal is reliable, and strong interference immunity, makes automobile dynamic quality and fuel consume reach optimum proportioning, thus reaches the object reducing exhaust emissions and save oil consumption.
Lambda sensor only when high temperature (end reaches 300 ° of more than C) its characteristic just can fully demonstrate, could output voltage.It is when about 800 ° of C, the fastest to the reacting condition of combination gas, and this characteristic can great changes will take place when low temperature.The first generation is hot type tubular oxygen sensor, and its response time is long, and measuring accuracy is low, and the second generation is hot type sheet structure oxygen sensor, and its response time is short and measuring accuracy is high.The sheet structure oxygen sensor of existing design comprises protective seam, zirconia sensitive layer, reference gas channel layer, zone of heating; this kind of structure can find out that each layer is directly connected; because the thermal expansivity of lambda sensor different structure interlayer is different; sensor in use; due to constant intensification and cooling; sensor is difficult to bear heat fatigue so; and in use there is the failure phenomenons such as cracking; and the mechanical property of different structure interlayer mates the performance directly causing lambda sensor, the stability of each layer is low.
Summary of the invention
In use there is the failure phenomenons such as cracking to overcome existing sheet structure oxygen sensor, the invention provides a kind of monolithic multilayer structure lambda sensor, by increasing Porous transition layer, regulate the thermal expansion of different structure interlayer, prevent from ftractureing between lamination, ensure the serviceable life of sensor, further, improve the mechanical property coupling of lambda sensor different structure interlayer, increase the stability of each layer, thus improve the performance of sensor.
For realizing above-mentioned technical purpose, reach above-mentioned technique effect, the present invention is achieved through the following technical solutions:
Monolithic multilayer structure lambda sensor, comprise zirconia sensitive layer, reference gas channel layer, zone of heating, described zirconia sensitive layer upper surface is provided with external electrode, lower surface is provided with interior electrode, it is characterized in that, be provided with between zirconia sensitive layer and reference gas channel layer and regulate different structure layer thermal expansivity, prevent the first Porous transition layer ftractureed between layers, be provided with between reference gas channel layer and zone of heating and regulate different structure layer thermal expansivity, prevent the second Porous transition layer ftractureed between layers, monolithic multilayer structure lambda sensor is arranged in order as zirconia sensitive layer, first Porous transition layer, reference gas channel layer, second Porous transition layer and zone of heating.
Between zirconia sensitive layer and reference gas channel layer, between reference gas channel layer and zone of heating, be all provided with Porous transition layer, the inter-laminar stress that Porous transition layer can regulate different structure layer to cause because of thermal expansion, and then prevent from ftractureing between layers, ensure that the serviceable life of lambda sensor, ensure the stability between different structure layer simultaneously, improve the integrally-built performance of lambda sensor.
Further, described Porous transition layer comprises for close adhesion different structure layer, the resistant strata regulating different structure layer thermal expansivity, increase different structure layer stability successively, zirconia ceramic layer.On resistant strata, be preferably also provided with the alumina layer improving different structure interlayer mechanical property coupling.The Porous transition layer of three-decker is coordinated mutually, ensure that the stability of lambda sensor, mechanical matching performance etc.
Lambda sensor only when high temperature (end reaches 300 ° of more than C) its characteristic just can fully demonstrate, could output voltage.So be provided with heating electrode on zone of heating, as long as 10S can reach a high temperature after adding power source, the response time is fast.
The invention has the beneficial effects as follows: between zirconia sensitive layer and reference gas channel layer, between reference gas channel layer and zone of heating, be all provided with Porous transition layer, regulate the thermal expansion of different structure interlayer, prevent from ftractureing between lamination, ensure the serviceable life of sensor, the Porous transition layer of three-decker, the mechanical property coupling of lambda sensor different structure interlayer can be improved, increase the stability of each layer, thus improve the performance of sensor.
Accompanying drawing explanation
Fig. 1 is the structural drawing that monolithic multilayer structure lambda sensor of the present invention splits;
Fig. 2 is the structural representation after monolithic multilayer structure lambda sensor of the present invention combination;
Fig. 3 is the Porous transition layer of three-decker of the present invention;
The mark implication of accompanying drawing is as follows:
1: protective seam; 2: zirconia sensitive layer; 21: external electrode; 3: the first Porous transition layers; 4: reference gas channel layer; 41: reference gas passage; 5: the second Porous transition layers; 6: zone of heating; 61: heating electrode; 7: zirconia ceramic layer; 8: resistant strata; 9: alumina layer.
Embodiment
Below in conjunction with accompanying drawing and specific embodiment, technical solution of the present invention is described in further detail, can better understand the present invention to make those skilled in the art and can be implemented, but illustrated embodiment is not as a limitation of the invention.
As shown in Figure 1, monolithic multilayer structure lambda sensor, comprise protective seam 1 successively from top to bottom, zirconia sensitive layer 2, first Porous transition layer 3, reference gas channel layer 4, second Porous transition layer 5, zone of heating 6, wherein protective seam 1 can be used for protecting whole lambda sensor, the serviceable life of lambda sensor can be increased, Fig. 2 is the structural representation after combination, zirconia sensitive layer upper surface is provided with external electrode 21, lower surface is provided with interior electrode (not shown), be provided with between zirconia sensitive layer 2 and reference gas channel layer 4 and regulate different structure layer thermal expansivity, prevent the first Porous transition layer 3 ftractureed between layers, be provided with between reference gas channel layer 4 and zone of heating 6 and regulate different structure layer thermal expansivity, prevent the second Porous transition layer 5 ftractureed between layers, the inter-laminar stress that different structure layer causes because of thermal expansion can be regulated, and then prevent from ftractureing between layers, ensure that the serviceable life of lambda sensor, ensure the stability between different structure layer simultaneously, improve the integrally-built performance of lambda sensor.Reference gas channel layer 4 is provided with the reference gas passage 41 holding reference gas, gas to be measured, the waste gas of such as automobile is in the outside of lambda sensor, because the gas oxygen content of zirconia sensitive layer 2 top and bottom is different, so electromotive force can be formed at zirconia sensitive layer 2 upper and lower sides, just can record electromotive force numerical value by external electrode 21 and interior electrode, and then calculate the oxygen content of gas to be measured.
Porous transition layer can be double-layer structure, namely comprises resistant strata 8 and zirconia ceramic layer 7 successively, the stability that resistant strata is used for close adhesion different structure layer, regulates different structure layer thermal expansivity, increases different structure layer.Preferred Porous transition layer is three-decker, on resistant strata 8, be namely also provided with the alumina layer 9 improving different structure interlayer mechanical property coupling.Wherein resistant strata 8 can be yttrium oxide layer or magnesium oxide layer or cao layers, and the Porous transition layer of three-decker is coordinated mutually, ensure that the stability of lambda sensor, mechanical matching performance etc.Preferably the thickness of the first Porous transition layer 3 and the second Porous transition layer 5 is between 10-25 micron, ensures lightly integrally-built.Lambda sensor only when high temperature (end reaches 300 ° of more than C) its characteristic just can fully demonstrate, could output voltage.So be provided with heating electrode 61 on zone of heating 6, as long as 10S can reach a high temperature after adding power source, the response time is fast.
These are only the preferred embodiments of the present invention; not thereby the scope of the claims of the present invention is limited; every utilize instructions of the present invention and accompanying drawing content to do equivalent structure or equivalent flow process conversion; or be directly or indirectly used in the technical field that other are relevant, be all in like manner included in scope of patent protection of the present invention.
Claims (8)
1. monolithic multilayer structure lambda sensor, comprise zirconia sensitive layer, reference gas channel layer, zone of heating, described zirconia sensitive layer upper surface is provided with external electrode, lower surface is provided with interior electrode, it is characterized in that, be provided with between zirconia sensitive layer and reference gas channel layer and regulate different structure layer thermal expansivity, prevent the first Porous transition layer ftractureed between layers, be provided with between reference gas channel layer and zone of heating and regulate different structure layer thermal expansivity, prevent the second Porous transition layer ftractureed between layers, monolithic multilayer structure lambda sensor is arranged in order as zirconia sensitive layer, first Porous transition layer, reference gas channel layer, second Porous transition layer and zone of heating, described Porous transition layer comprises for close adhesion different structure layer successively, regulate different structure layer thermal expansivity, increase the resistant strata of different structure layer stability, zirconia ceramic layer, described Porous transition layer is also provided with the alumina layer improving different structure interlayer mechanical property coupling on resistant strata.
2. monolithic multilayer structure lambda sensor according to claim 1, is characterized in that, described resistant strata is yttrium oxide layer.
3. monolithic multilayer structure lambda sensor according to claim 1, is characterized in that, described resistant strata is magnesium oxide layer.
4. monolithic multilayer structure lambda sensor according to claim 1, is characterized in that, described resistant strata is cao layers.
5. monolithic multilayer structure lambda sensor according to claim 1, is characterized in that, is also provided with protective seam outside described zirconia sensitive layer.
6. monolithic multilayer structure lambda sensor according to claim 5, is characterized in that, described zone of heating is provided with heating electrode.
7. monolithic multilayer structure lambda sensor according to claim 6, is characterized in that, described reference gas channel layer is provided with the reference gas passage holding reference gas.
8. the monolithic multilayer structure lambda sensor according to claim 1-7 any one, is characterized in that, the thickness of described first Porous transition layer and the second Porous transition layer is 10-25 micron.
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| CN201310394474.4A CN103454329B (en) | 2013-09-04 | 2013-09-04 | Monolithic multilayer structure lambda sensor |
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| CN201310394474.4A CN103454329B (en) | 2013-09-04 | 2013-09-04 | Monolithic multilayer structure lambda sensor |
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| CN103454329A CN103454329A (en) | 2013-12-18 |
| CN103454329B true CN103454329B (en) | 2016-03-23 |
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| CN104569106B (en) * | 2014-12-24 | 2017-12-01 | 昆山圣赛诺尔传感技术有限公司 | A kind of sheet type sensor and preparation method thereof |
| CN104569108B (en) * | 2014-12-24 | 2017-03-29 | 昆山圣赛诺尔传感技术有限公司 | A kind of preparation method of chip oxygen sensor |
| CN113376236B (en) * | 2021-06-02 | 2022-10-14 | 深圳聚德寿科技有限公司 | Tubular oxygen sensor core and preparation method thereof |
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| CN102235994A (en) * | 2010-04-23 | 2011-11-09 | 比亚迪股份有限公司 | Plate oxygen sensor and preparation method thereof |
| CN102455311A (en) * | 2010-10-21 | 2012-05-16 | 比亚迪股份有限公司 | Method for preparing chip of sheet oxygen sensor |
| CN102608182A (en) * | 2012-02-20 | 2012-07-25 | 曾咏平 | Oxygen sensor chip and manufacturing method thereof |
| CN103018283A (en) * | 2012-12-25 | 2013-04-03 | 珠海市香之君电子有限公司 | Chip type oxygen sensor |
| CN203519552U (en) * | 2013-09-04 | 2014-04-02 | 朱捷 | Oxygen sensor with multilayer sheet type structure |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| JP4050593B2 (en) * | 2002-11-01 | 2008-02-20 | 日本特殊陶業株式会社 | Gas sensor element and gas sensor using the same |
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Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102235994A (en) * | 2010-04-23 | 2011-11-09 | 比亚迪股份有限公司 | Plate oxygen sensor and preparation method thereof |
| CN102455311A (en) * | 2010-10-21 | 2012-05-16 | 比亚迪股份有限公司 | Method for preparing chip of sheet oxygen sensor |
| CN102608182A (en) * | 2012-02-20 | 2012-07-25 | 曾咏平 | Oxygen sensor chip and manufacturing method thereof |
| CN103018283A (en) * | 2012-12-25 | 2013-04-03 | 珠海市香之君电子有限公司 | Chip type oxygen sensor |
| CN203519552U (en) * | 2013-09-04 | 2014-04-02 | 朱捷 | Oxygen sensor with multilayer sheet type structure |
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