CN203117181U - Oxygen sensor chip - Google Patents
Oxygen sensor chip Download PDFInfo
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- CN203117181U CN203117181U CN 201220746845 CN201220746845U CN203117181U CN 203117181 U CN203117181 U CN 203117181U CN 201220746845 CN201220746845 CN 201220746845 CN 201220746845 U CN201220746845 U CN 201220746845U CN 203117181 U CN203117181 U CN 203117181U
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- sensor chip
- oxygen sensor
- oxygen
- porous
- sintering
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- Investigating Or Analyzing Materials By The Use Of Fluid Adsorption Or Reactions (AREA)
Abstract
The utility model provides an oxygen sensor chip, and relates to the oxygen sensor chip with a protective layer overlaid on the surface. The oxygen sensor chip comprises a protective layer (1), an oxygen testing material (2) and a basal body (3), wherein the oxygen testing material (2) is positioned on the surface of the basal body (3); and the surface of the oxygen testing material (2) is overlaid by the protective layer (1). According to the oxygen sensor chip, the bonding strength and the thermal matching among the protective layer (1), the basal body (3) and the oxygen testing material (2) are good. The oxygen sensor chip can be used for a long time under severe working conditions, and the service life of the oxygen sensor chip is prolonged effectively.
Description
Technical field
The utility model relates to a kind of oxygen sensor chip of the protective seam that is covered, and belongs to the ceramic applications technical field.
Background technology:
Use triple mode catalytic converter with the engine that reduces exhaust pollution on, the lambda sensor element that is absolutely necessary.In case the air-fuel ratio of combination gas departs from optimal air-fuel ratio when big, three-way catalyst will sharply descend to the detergent power of CO, hydrocarbon and oxynitrides, so lambda sensor is installed in the exhaust pipe of engine, in order to detect the concentration of oxygen in the exhaust, and to ECU(vehicle microcomputer controller) send feedback signal, controlled the increase and decrease of distributive value again by ECU, thereby the air-fuel ratio of combination gas is controlled near optimum value.
In a single day lambda sensor breaks down, the computer that makes the control electronic fuel injection system can not be obtained the information of oxygen concentration in the gas outlet, thereby can not carry out FEEDBACK CONTROL to air-fuel ratio, and engine consumption and exhaust pollution are increased, engine unstable idle speed occurs, lacks faults such as fire, surge.
The most common failure of lambda sensor has:
Lambda sensor saturnism: often use the automobile of doped fuel, even new lambda sensor also can only be worked several thousand kilometers.Since too high delivery temperature, and make plumbous its inside of invading, hindered the diffusion of oxonium ion, lambda sensor was lost efficacy.Even the use unleaded gasoline, its lead tolerance is approximately 0.01 grams per liter.There is the saturnine possibility of lambda sensor equally after long-term the use.
Lambda sensor silicon is poisoned: in general, the silicon dioxide that the silicon compound burning back of containing in gasoline and the lubricating oil generates, the organosilicon gas that the improper use of silicone rubber seal packing ring gives out all can make lambda sensor lose efficacy.
Because engine combustion is bad, form carbon distribution on lambda sensor surface, or lambda sensor inside entered sediments such as greasy dirt or dust, can hinder or block extraneous air to enter lambda sensor inside, make the signal misalignment of lambda sensor output, ECU can not revise air-fuel ratio in time.Produce carbon distribution, mainly show as oil consumption and rise, discharge of poisonous waste concentration obviously increases in the tail gas.
Through accelerated aging test, the oxygen sensor chip of the protective seam that is not covered is equivalent to engine about 4000km that travels serviceable life.
The utility model content
The utility model can well solve the most common failure of aforementioned lambda sensor at the protective seam of the well behaved porous ceramics of zirconium oxide based oxygen sensor chip surface increase one deck.
Increase the problem that one deck porous ceramics need solve the following aspects on the oxygen sensor chip surface:
1, the coupling between porous ceramics and the zirconia chip basal body mainly is coupling and the necessary bond strength of the two thermal expansivity;
2, the coupling between porous ceramics and the zirconia chip basal body porous surface oxygen determination material mainly also is coupling and the necessary bond strength of the two thermal expansivity;
3, can not stop up the duct of porous oxygen determination material behind the covering porous ceramic film material.
The utility model oxygen sensor chip comprises protective seam 1, oxygen determination material 2 and matrix 3, and described oxygen determination material 2 is positioned at above the oxygen sensor chip matrix 3, and oxygen determination material 2 surperficial protected seams 1 cover.
One of the utility model oxygen sensor chip optimal technical scheme: described protective seam (1) is porous ceramics.
The oxygen sensor chip of the well behaved porous ceramics of the surface-coated one deck of the utility model is an optimal technical scheme again: described porous ceramics is porous alumina ceramic.
The utility model is compared with prior art obtained following advantage:
The utility model is raw material with aluminium compound and carbon material, covers one deck porous ceramics at oxygen sensor chip and porous oxygen determination material surface.Objectionable impurities such as that the oxygen sensor chip of the utility model lining protective seam is adapted at is leaded in the motor exhaust, silicon and tail gas easily form under the bad working environments condition such as carbon distribution and work, and oxygen content in the tail gas is quick on the draw, and are difficult for distortion.Gained porous ceramics function admirable; good with zirconia matrix, oxygen determination match materials; can protect lambda sensor, porous Pt surface to avoid being subjected to strong air flow to blow brush; guarantee the result of use of lambda sensor, oxygen sensor chip is travelled from the protective seam precontract that is covered serviceable life travel more than the 10000km after 4000km extends to the lining protective seam.The utility model raw material is easy to get, and preparation technology is simple, environmental protection, is suitable for large-scale industrial production.
Description of drawings
Fig. 1 is the utility model product structure synoptic diagram.
Embodiment
Referring to Fig. 1.
Be D50=0.52 μ m with granularity, the aluminium oxide of purity 98.5wt% and aquadag are dispersed in the organic solvent, and wherein the weight ratio of aluminium oxide and aquadag is 4:1; Organic solvent is selected terpinol, dibutyl phthalate potpourri, adds ethyl cellulose simultaneously, and weight ratio is terpinol: dibutyl phthalate: ethyl cellulose 1:0.05; : 0.03.The gross weight of aluminium oxide and aquadag and the weight ratio of organic solvent are 1:0.8; Adopt the method for serigraphy to be printed on the Zirconium oxide oxygen sensor chip surface that porous Pt material is arranged in the slurry that obtains; The oxygen sensor chip for preparing is previously put into 75 ℃ oven for drying, be incubated 24 hours; The oxygen sensor chip of drying is taken out, sintering in kiln, sintering temperature is 1400 ℃, sintering time is 3h.Porous Pt material surface lining one deck porous alumina ceramic on the cooling post oxygen sensor chip.
The porous ceramics of sintering preparation and zirconia ceramics and porous Pt material have good cohesive strength and heat coupling.
Through accelerated aging test, the oxygen sensor chip behind the present embodiment lining protective seam is equivalent to engine and travels more than the 10000km serviceable life.
Referring to Fig. 1.
Be D50=0.98 μ m with granularity, the aluminium oxide of purity 99wt% and aquadag are dispersed in the organic solvent, and wherein the weight ratio of aluminium oxide and aquadag is 5:1; Organic solvent is selected the potpourri of terpinol, dibutyl phthalate, and adds PVB, and weight ratio is terpinol: dibutyl phthalate: PVB=1:0.2:0.04; The gross weight of aluminium oxide and aquadag and the weight ratio of organic solvent are 1:1; Adopt the method for serigraphy to be printed on the Zirconium oxide oxygen sensor chip surface that porous Pt material is arranged in the slurry that obtains; The oxygen sensor chip for preparing is previously put into 80 ℃ oven for drying, be incubated 16 hours; The oxygen sensor chip of drying is taken out, sintering in muffle furnace, sintering temperature is 1500 ℃, sintering time is 2.5h.
The porous ceramics of sintering preparation and zirconia ceramics and porous Pt material have good cohesive strength and heat coupling.
Through accelerated aging test, the oxygen sensor chip behind the present embodiment lining protective seam is equivalent to engine about 11000km that travels serviceable life.
Referring to Fig. 1.
Be D50=1.97 μ m with granularity, the aluminium oxide of purity 99.99% and aquadag are dispersed in the organic solvent, and wherein the weight ratio of aluminium oxide and aquadag is 6:1; Organic solvent is selected terpinol, dibutyl phthalate potpourri, and adds ethyl cellulose.Weight ratio is terpinol: dibutyl phthalate: ethyl cellulose=1:0.2:0.05; The gross weight of aluminium oxide and aquadag and the weight ratio of organic solvent are 1:1.2; Adopt the method for spraying to be printed on the Zirconium oxide oxygen sensor chip surface that porous Pt material is arranged in the slurry that obtains; The oxygen sensor chip for preparing is previously put into 85 ℃ oven for drying, be incubated 14 hours; The oxygen sensor chip of drying is taken out, sintering in muffle furnace, sintering temperature is 1550 ℃, sintering time is 2.5h.
The porous ceramics of sintering preparation and zirconia ceramics and porous Pt material have good cohesive strength and heat coupling.
Through accelerated aging test, the oxygen sensor chip behind the present embodiment lining protective seam is equivalent to engine about 11000km that travels serviceable life.
Embodiment 4
Referring to Fig. 1.
Be D50=1.05 μ m with granularity, purity is dispersed in greater than 98.5% aluminium oxide and aquadag and prepares slurry in the organic solvent, wherein the weight ratio of aluminium oxide and aquadag is 8:1, organic solvent is selected terpinol, ethyl cellulose, dibutyl phthalate potpourri, mixing match terpinol: dibutyl phthalate: ethyl cellulose=1:0.08:0.08; The gross weight of aluminium oxide and aquadag and the weight ratio of organic solvent are 1:1.9; Adopt the method for spraying to be printed on the Zirconium oxide oxygen sensor chip surface that porous Pt material is arranged in the slurry that obtains; The oxygen sensor chip for preparing is previously put into 95 ℃ oven for drying, be incubated 12 hours; The oxygen sensor chip of drying is taken out, sintering in muffle furnace, sintering temperature is 1600 ℃, sintering time is 1h.
The porous ceramics of sintering preparation and zirconia ceramics and porous Pt material have good cohesive strength and heat coupling.
Through accelerated aging test, the oxygen sensor chip behind the present embodiment lining protective seam is equivalent to engine and travels above 10000km serviceable life.
Embodiment 5
Referring to Fig. 1.
Be D50=0.51 μ m with granularity, the aluminium oxide of purity 99% and aquadag are dispersed in the organic solvent, and wherein the weight ratio of aluminium oxide and aquadag is 8:1; Organic solvent is selected terpinol, ethyl cellulose, dibutyl phthalate, mixing match 1:0.03:0.08; The gross weight of aluminium oxide and aquadag and the weight ratio of organic solvent are 1:1.5; Adopt the method for spraying to be printed on the Zirconium oxide oxygen sensor chip surface that porous Pt material is arranged in the slurry that obtains; The drying box of the lambda sensor for preparing previously being put into 85 ℃ is dried, and is incubated 15 hours; The oxygen sensor chip of drying is taken out, sintering in muffle furnace, sintering temperature is 1350 ℃, sintering time is 4h.
The porous ceramics of sintering preparation and zirconia ceramics and porous Pt material have good cohesive strength and heat coupling.
Through accelerated aging test, the oxygen sensor chip behind the present embodiment lining protective seam is equivalent to engine about 12000km that travels serviceable life.
Embodiment 6
Referring to Fig. 1.
Be that aluminium hydroxide 12.5 gram, acetylene carbon black 0.98 gram of 5000 orders, purity 99.9wt% fully mixes with AR dibutyl phthalate 60ml with commercially available granularity, be coated in the Zirconium oxide oxygen sensor chip surface that porous Pt material is arranged after making slurry; The oxygen sensor chip for preparing is previously put into 80 ℃ oven for drying, be incubated 24 hours; The oxygen sensor chip of drying is taken out, and is 1400 ℃ of sintering 4h at high temperature furnace with temperature.Porous Pt material surface lining one deck porous alumina ceramic on the cooling post oxygen sensor chip.
The porous ceramics of sintering preparation and zirconia ceramics and porous Pt material have good cohesive strength and heat coupling.
Through accelerated aging test, the oxygen sensor chip behind the present embodiment lining protective seam is equivalent to engine about 10000km that travels serviceable life.
Embodiment 7
Referring to Fig. 1.
Be D50=1.97 μ m with granularity, aluminium hydroxide 15 grams that aluminium oxide 10 grams of purity 99.99%, granularity are 5000 orders (2.6 μ m), purity 99.9wt%, aquadag 4.2 grams are dispersed in the 36 gram terpinols and add PVB7 restrains form slurry; The slurry that obtains is sprayed on the Zirconium oxide oxygen sensor chip surface that porous Pt material is arranged; The oxygen sensor chip for preparing is previously put into 85 ℃ oven for drying, be incubated 16 hours; The oxygen sensor chip of drying is taken out, sintering in muffle furnace, sintering temperature is 1550 ℃, sintering time is 2.5h.
The porous ceramics of sintering preparation and zirconia ceramics and porous Pt material have good cohesive strength and heat coupling.
Through accelerated aging test, the oxygen sensor chip behind the present embodiment lining protective seam is equivalent to engine about 11000km that travels serviceable life.
Embodiment 8
Referring to Fig. 1.
Be that aluminium hydroxide 30 gram of 5000 orders, purity 99.9wt%, carbon dust 4.5 grams that separate in the lime nitrogen hydrolysis residue are dispersed in the 41 gram terpinols with commercially available granularity, add ethyl cellulose 1 gram and PVB0.8 restraint form slurry simultaneously; The slurry that obtains is sprayed on the Zirconium oxide oxygen sensor chip surface that porous Pt material is arranged; The oxygen sensor chip for preparing is previously put into 85 ℃ oven for drying, be incubated 15 hours; The oxygen sensor chip of drying is taken out, sintering in muffle furnace, sintering temperature is 1500 ℃, sintering time is 2.5h.
The porous ceramics of sintering preparation and zirconia ceramics and porous Pt material have good cohesive strength and heat coupling.
Through accelerated aging test, the oxygen sensor chip behind the present embodiment lining protective seam is equivalent to engine about 10000km that travels serviceable life.
Explanation is that above embodiment is only unrestricted in order to the technical solution of the utility model to be described at last.Although with reference to preferred embodiment the utility model is had been described in detail, those of ordinary skill in the art is to be understood that, the technical solution of the utility model made amendment or be equal to replace and do not break away from aim and the scope of technical solutions of the utility model, all should be encompassed in the middle of the claim scope of the present utility model.
Claims (3)
1. an oxygen sensor chip comprises protective seam (1), oxygen determination material (2) and matrix (3), and described oxygen determination material (2) is positioned at matrix (3) surface, it is characterized in that: the surperficial protected seam of oxygen determination material (2) (1) covers.
2. oxygen sensor chip as claimed in claim 1, it is characterized in that: described protective seam (1) is porous ceramics.
3. oxygen sensor chip as claimed in claim 2, it is characterized in that: described porous ceramics is porous alumina ceramic.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201220746845 CN203117181U (en) | 2012-12-29 | 2012-12-29 | Oxygen sensor chip |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201220746845 CN203117181U (en) | 2012-12-29 | 2012-12-29 | Oxygen sensor chip |
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| Publication Number | Publication Date |
|---|---|
| CN203117181U true CN203117181U (en) | 2013-08-07 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 201220746845 Expired - Lifetime CN203117181U (en) | 2012-12-29 | 2012-12-29 | Oxygen sensor chip |
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| CN (1) | CN203117181U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105803450A (en) * | 2014-12-29 | 2016-07-27 | 中国科学院上海硅酸盐研究所 | Porous alumina membrane for nitrogen-oxygen sensor and preparation method thereof |
-
2012
- 2012-12-29 CN CN 201220746845 patent/CN203117181U/en not_active Expired - Lifetime
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105803450A (en) * | 2014-12-29 | 2016-07-27 | 中国科学院上海硅酸盐研究所 | Porous alumina membrane for nitrogen-oxygen sensor and preparation method thereof |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C56 | Change in the name or address of the patentee | ||
| CP01 | Change in the name or title of a patent holder |
Address after: 289 No. 341000 Jiangxi province Zhanggong District of Ganzhou City, East Avenue. Patentee after: QIANDONG RARE EARTH GROUP Co.,Ltd. Patentee after: SHANGHAI INSTITUTE OF CERAMICS, CHINESE ACADEMY OF SCIENCES Address before: 289 No. 341000 Jiangxi province Zhanggong District of Ganzhou City, East Avenue. Patentee before: GANZHOU QIANDONG RARE EARTH GROUP Co.,Ltd. Patentee before: SHANGHAI INSTITUTE OF CERAMICS, CHINESE ACADEMY OF SCIENCES |
|
| CX01 | Expiry of patent term |
Granted publication date: 20130807 |
|
| CX01 | Expiry of patent term |