CN115849951A - Preparation method and application of nitrogen-oxygen sensor porous material and sensitive element - Google Patents
Preparation method and application of nitrogen-oxygen sensor porous material and sensitive element Download PDFInfo
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- DOTMOQHOJINYBL-UHFFFAOYSA-N molecular nitrogen;molecular oxygen Chemical compound N#N.O=O DOTMOQHOJINYBL-UHFFFAOYSA-N 0.000 title claims abstract description 52
- 239000011148 porous material Substances 0.000 title claims abstract description 36
- 238000002360 preparation method Methods 0.000 title claims abstract description 14
- MCMNRKCIXSYSNV-UHFFFAOYSA-N Zirconium dioxide Chemical compound O=[Zr]=O MCMNRKCIXSYSNV-UHFFFAOYSA-N 0.000 claims abstract description 48
- 239000000843 powder Substances 0.000 claims abstract description 24
- 239000000758 substrate Substances 0.000 claims abstract description 18
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 claims abstract description 16
- 239000001856 Ethyl cellulose Substances 0.000 claims abstract description 13
- ZZSNKZQZMQGXPY-UHFFFAOYSA-N Ethyl cellulose Chemical compound CCOCC1OC(OC)C(OCC)C(OCC)C1OC1C(O)C(O)C(OC)C(CO)O1 ZZSNKZQZMQGXPY-UHFFFAOYSA-N 0.000 claims abstract description 13
- WUOACPNHFRMFPN-UHFFFAOYSA-N alpha-terpineol Chemical compound CC1=CCC(C(C)(C)O)CC1 WUOACPNHFRMFPN-UHFFFAOYSA-N 0.000 claims abstract description 13
- SQIFACVGCPWBQZ-UHFFFAOYSA-N delta-terpineol Natural products CC(C)(O)C1CCC(=C)CC1 SQIFACVGCPWBQZ-UHFFFAOYSA-N 0.000 claims abstract description 13
- OEIWPNWSDYFMIL-UHFFFAOYSA-N dioctyl benzene-1,4-dicarboxylate Chemical compound CCCCCCCCOC(=O)C1=CC=C(C(=O)OCCCCCCCC)C=C1 OEIWPNWSDYFMIL-UHFFFAOYSA-N 0.000 claims abstract description 13
- 229920001249 ethyl cellulose Polymers 0.000 claims abstract description 13
- 235000019325 ethyl cellulose Nutrition 0.000 claims abstract description 13
- 229940116411 terpineol Drugs 0.000 claims abstract description 13
- 239000002002 slurry Substances 0.000 claims description 17
- 238000000498 ball milling Methods 0.000 claims description 13
- 230000004888 barrier function Effects 0.000 claims description 12
- 238000007599 discharging Methods 0.000 claims description 12
- 239000003292 glue Substances 0.000 claims description 11
- 238000002955 isolation Methods 0.000 claims description 11
- 238000000034 method Methods 0.000 claims description 11
- 238000007639 printing Methods 0.000 claims description 9
- 238000005303 weighing Methods 0.000 claims description 8
- 238000001354 calcination Methods 0.000 claims description 7
- 238000010030 laminating Methods 0.000 claims description 6
- 238000001035 drying Methods 0.000 claims description 4
- 239000007772 electrode material Substances 0.000 claims description 3
- 238000004519 manufacturing process Methods 0.000 claims description 3
- AVXURJPOCDRRFD-UHFFFAOYSA-N Hydroxylamine Chemical class ON AVXURJPOCDRRFD-UHFFFAOYSA-N 0.000 claims 4
- 238000012360 testing method Methods 0.000 description 10
- 230000000052 comparative effect Effects 0.000 description 9
- 229910002804 graphite Inorganic materials 0.000 description 9
- 239000010439 graphite Substances 0.000 description 9
- 230000008569 process Effects 0.000 description 8
- 238000005245 sintering Methods 0.000 description 6
- 239000007789 gas Substances 0.000 description 5
- 239000001301 oxygen Substances 0.000 description 5
- 229910052760 oxygen Inorganic materials 0.000 description 5
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 description 4
- 238000003475 lamination Methods 0.000 description 4
- 238000007650 screen-printing Methods 0.000 description 4
- 239000007784 solid electrolyte Substances 0.000 description 4
- 229910018072 Al 2 O 3 Inorganic materials 0.000 description 3
- 238000010344 co-firing Methods 0.000 description 3
- 230000007547 defect Effects 0.000 description 3
- 230000000694 effects Effects 0.000 description 3
- 238000005516 engineering process Methods 0.000 description 3
- 238000005470 impregnation Methods 0.000 description 3
- 239000000463 material Substances 0.000 description 3
- PNEYBMLMFCGWSK-UHFFFAOYSA-N aluminium oxide Inorganic materials [O-2].[O-2].[O-2].[Al+3].[Al+3] PNEYBMLMFCGWSK-UHFFFAOYSA-N 0.000 description 2
- 239000000969 carrier Substances 0.000 description 2
- 239000003795 chemical substances by application Substances 0.000 description 2
- 238000010438 heat treatment Methods 0.000 description 2
- 239000011159 matrix material Substances 0.000 description 2
- 238000005086 pumping Methods 0.000 description 2
- 238000001878 scanning electron micrograph Methods 0.000 description 2
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 2
- NIPNSKYNPDTRPC-UHFFFAOYSA-N N-[2-oxo-2-(2,4,6,7-tetrahydrotriazolo[4,5-c]pyridin-5-yl)ethyl]-2-[[3-(trifluoromethoxy)phenyl]methylamino]pyrimidine-5-carboxamide Chemical compound O=C(CNC(=O)C=1C=NC(=NC=1)NCC1=CC(=CC=C1)OC(F)(F)F)N1CC2=C(CC1)NN=N2 NIPNSKYNPDTRPC-UHFFFAOYSA-N 0.000 description 1
- 230000009471 action Effects 0.000 description 1
- 230000004075 alteration Effects 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 239000002131 composite material Substances 0.000 description 1
- 238000011161 development Methods 0.000 description 1
- 230000007646 directional migration Effects 0.000 description 1
- 238000009826 distribution Methods 0.000 description 1
- 230000005684 electric field Effects 0.000 description 1
- 239000002003 electrode paste Substances 0.000 description 1
- 238000005272 metallurgy Methods 0.000 description 1
- 239000000203 mixture Substances 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 239000002994 raw material Substances 0.000 description 1
- 239000003381 stabilizer Substances 0.000 description 1
- 239000000126 substance Substances 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
- RUDFQVOCFDJEEF-UHFFFAOYSA-N yttrium(III) oxide Inorganic materials [O-2].[O-2].[O-2].[Y+3].[Y+3] RUDFQVOCFDJEEF-UHFFFAOYSA-N 0.000 description 1
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- Investigating Or Analyzing Materials By The Use Of Fluid Adsorption Or Reactions (AREA)
- Measuring Oxygen Concentration In Cells (AREA)
Abstract
The invention discloses a preparation method and application of a nitrogen-oxygen sensor porous material and a sensitive element, wherein the porous material comprises the following components in parts by weight: al (Al) 2 O 3 9.5 to 10.8 portions of powder, 0.8 to 1.3 portions of YSZ powder, 0.8 to 2.3 portions of graphite powder, 10.3 to 11.8 portions of terpineol, 0.1 to 0.2 portion of ethyl cellulose and 0.1 to 0.2 portion of dioctyl terephthalate; after the porous material is printed on a zirconia substrate and calcined at 400-1470 ℃ for 4-5h, the formed reasonable porosity can solve the problem of electrical property difference caused by unstable air inflow, so that the purpose of improving the stability and consistency of the nitrogen-oxygen sensor is achieved, and the yield of the sensitive element of the nitrogen-oxygen sensor is further improved.
Description
Technical Field
The invention relates to the technical field of sensor materials, in particular to a preparation method and application of a nitrogen-oxygen sensor porous material and a sensitive element.
Background
With the rapid development of the industry in China, zirconia-based sensors and various zirconia oxygen measuring instruments are widely applied to the automobile industry, the chemical industry, the electronic industry, metallurgy and the like. The zirconia is an oxygen ion solid electrolyte with wide application, and the zirconia solid electrolyte doped with a proper amount of yttria as a stabilizing agent has a large number of oxygen vacancies which can generate directional migration as carriers under the action of an external electric field, so that the conductivity of the zirconia solid electrolyte is greatly enhanced, and a series of zirconia-based sensors and various zirconia oxygen measuring instruments can be prepared by utilizing the characteristic of the zirconia solid electrolyte.
The nitrogen-oxygen sensor is a very important sensor widely used in modern automobiles and is used for detecting the concentration content of NOx in automobile exhaust emission. In the preparation process of the sensitive element of the nitrogen-oxygen sensor, an isolation barrier consisting of a porous material and a substrate is the key for controlling the gas inflow, and the electrical property of the sensitive element of the nitrogen-oxygen sensor is determined by the size of the gas inflow.
In the prior art, the performance of a nitrogen-oxygen sensor sensitive element is affected by the electrical property difference caused by the unstable air inflow of an isolation barrier in the working process, so that a new nitrogen-oxygen sensor porous material is needed to be provided for solving the defect of unstable air inflow when the nitrogen-oxygen sensor sensitive element is prepared.
Disclosure of Invention
The invention provides a nitrogen-oxygen sensor porous material, which overcomes the defect that the performance of a sensor is influenced by the electrical property difference caused by the unstable air input of an isolation barrier in the working process of a nitrogen-oxygen sensor sensitive element in the prior art.
In order to achieve the purpose, the scheme of the invention is as follows:
a nitrogen-oxygen sensor porous material comprises the following components in parts by weight: al (Al) 2 O 3 9.5 to 10.8 portions of powder, 0.8 to 1.3 portions of YSZ powder, 0.8 to 1.3 portions of graphite powder, 10.3 to 11.8 portions of terpineol, 0.1 to 0.2 portion of ethyl cellulose and 0.1 to 0.2 portion of dioctyl terephthalate.
Further, the porous material comprises the following components in parts by weight: al (Al) 2 O 3 10 parts of powder, 1 part of YSZ powder and graphite powder1 part, 11 parts of terpineol, 0.1 part of ethyl cellulose and 0.1 part of dioctyl terephthalate.
Further, the porous material has a viscosity in the range of 200-300Pa · s.
The invention also aims to provide a preparation method of the sensitive element of the nitrogen-oxygen sensor, which comprises the following steps:
s1, weighing the components of the porous material of the nitrogen-oxygen sensor in proportion, and standing after ball milling to obtain slurry;
s2, printing the slurry on an isolation barrier zirconia substrate, leveling at normal temperature, and drying;
s3, preparing a green body by laminating a plurality of layers of zirconia substrates, and discharging glue;
s4, calcining the green blank subjected to rubber discharge at 1400-1470 ℃ for 4-5h to obtain the sensitive element of the nitrogen-oxygen sensor.
Further, the drying process in the step S2 is carried out for 20-60min at 50-70 ℃.
Further, the glue discharging process in step S3 is performed at 300 ℃.
The invention also provides the nitrogen-oxygen sensor sensitive element obtained by the preparation method of the nitrogen-oxygen sensor sensitive element, and the printing film thickness of the element is 18um.
Further, the porosity of the electrode material of the sensitive element is 15-18%.
Further, the limiting current of the sensitive element is 2.8-3.5mA.
The invention further aims to provide application of the porous material or the preparation method of the nitrogen-oxygen sensor sensitive element in preparation of a nitrogen-oxygen sensor.
Compared with the prior art, the invention has the following beneficial effects:
1. the porous material provided by the invention takes graphite as a pore-forming agent, and can be combined with Al when being applied to preparation of a nitrogen-oxygen sensor sensitive element by adjusting reasonable addition amount 2 O 3 And YSZ, the composite material has the porosity of 15-18 percent, and has good printability and good co-firing matching with a zirconia matrix material after sintering.
2. According to the preparation method of the sensitive element of the nitrogen-oxygen sensor, the porous material is printed on the zirconia substrate, the reasonable film thickness and porosity of the sensitive element of the nitrogen-oxygen sensor are effectively guaranteed by controlling the reasonable calcination temperature, the air inflow can be stabilized, the limiting current is 2.8-3.5mA, and the stable electrical property of the sensitive element of the nitrogen-oxygen sensor is guaranteed.
Drawings
FIG. 1 is an SEM image of a sintered porous material of a sensitive element of a nitrogen-oxygen sensor.
FIG. 2 shows the result of limiting current test of the sensing element of the NOx sensor of the present invention.
FIG. 3 shows the result of limiting current test of the sensing element of the oxynitride sensor of comparative example 2 according to the present invention.
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
In one embodiment, a method for preparing a sensing element of a nitrogen-oxygen sensor is provided, which comprises the following steps:
s1, weighing the components of the porous material of the nitrogen-oxygen sensor in proportion, and standing after ball milling to obtain slurry; wherein the porous material comprises the following components in parts by mass: al (Al) 2 O 3 9.5-10.8 parts of powder, 0.8-1.3 parts of YSZ powder, 0.8-1.3 parts of graphite powder, 10.3-11.8 parts of terpineol, 0.1-0.2 part of ethyl cellulose and 0.1-0.2 part of dioctyl terephthalate;
s2, printing the slurry on an isolation barrier zirconia substrate, leveling at normal temperature for 15min, and baking at 50-70 ℃ for 20-60min;
s3, adopting a lamination process to laminate a plurality of layers of zirconia substrates to prepare a raw blank of the sensitive element of the oxynitride sensor, laminating a plurality of layers of zirconia substrates to prepare a raw blank, and placing the raw blank in a glue discharging furnace for discharging glue at 300 ℃;
s4, calcining the green blank subjected to rubber discharge at 1400-1470 ℃ for 4-5h to obtain the sensitive element of the nitrogen-oxygen sensor.
In the preparation method, the porous material takes graphite and YSZ as main raw materials, and dioctyl terephthalate, terpineol, ethyl cellulose and the like as organic carriers, so that the viscosity range of the slurry is 200-300 Pa.s, and the leveling property and the dispersing effect of the slurry are adjusted. The scheme adopts graphite as a pore-forming agent for controlling the porosity of the isolation barrier formed after sintering, thereby controlling the gas inflow. An SEM image of the sintered porous material of the sensitive element of the nitrogen-oxygen sensor is shown in figure 1, and the figure 1 shows that the formed porous material of the sensitive element of the nitrogen-oxygen sensor is well combined with a YSZ base material after being sintered and has no defects of cracks, bulges and the like. The porosity is measured to be 15-18% by an alumina porosity tester, the average grain size is measured to be 2-3 μm, and the gas inflow can be well controlled.
On the other hand, the thickness of the fired thick-film resistor film can be controlled to be about 18 μm by reasonably adjusting the screen printing parameters and the component proportion of the pump electrode paste. The provided porous material slurry can achieve a good co-firing matching effect with a YSZ substrate at 1400-1470 ℃, the adhesion of a fired isolation barrier and a substrate is firm, the air input is stable, and when the heating voltage is increased to 10V, the limit current test result is shown in figure 2 and is stabilized at 2.8-3.5mA. The pumping current can ensure that the oxygen in a chamber is pumped to 1-5 ppm, and the pumping current has small difference and higher consistency. The porous electrode material of the sensitive element of the nitrogen-oxygen sensor has the advantages of good printing process, good co-firing matching with a base material after sintering, uniform porosity distribution, excellent performance of the produced sensitive element of the nitrogen-oxygen sensor and the like, and has higher value when being applied to the production of the nitrogen-oxygen sensor.
As a preferred embodiment, the porous material comprises the following components: al (Al) 2 O 3 10 parts of powder, 1 part of YSZ powder, 1 part of graphite powder, 11 parts of terpineol, 0.1 part of ethyl cellulose and 0.1 part of dioctyl terephthalate. Graphite powder occupying the matrix (Al) 2 O 3 And YSZ) 9% of the mass, the optimal porosity of the barrier is maintained to be 16-17%, the gas inflow is uniform, and the effect is optimal.
Example 1
1) Weighing Al 2 O 3 200g of powder, 20g of YSZ powder, 20g of graphite, 220g of terpineol, 2g of ethyl cellulose and 2g of dioctyl terephthalate are poured into a ball milling tank, ball milling is carried out for 24 hours, and standing is carried out for 12 hours to obtain porous material slurry;
2) Printing the porous material slurry on an isolation barrier zirconia substrate by adopting a screen printing technology, standing for 15 minutes at normal temperature for leveling, and baking for 20 minutes at 70 ℃;
3) Preparing a raw blank of the sensitive element of the nitrogen-oxygen sensor by laminating a plurality of layers of zirconia substrates by adopting a lamination process;
4) Placing the nitrogen-oxygen sensor sensitive element green blank in a glue discharging furnace, and discharging glue at 300 ℃;
5) And placing the crude blank of the nitrogen-oxygen sensor sensitive element after the rubber is removed in a sintering furnace, and calcining at 1470 ℃ for 4h to obtain the nitrogen-oxygen sensor sensitive element.
Example 2
1) Weighing Al 2 O 3 190g of powder, 16g of YSZ powder, 18g of graphite, 210g of terpineol, 2g of ethyl cellulose and 2g of dioctyl terephthalate, pouring the mixture into a ball milling tank, carrying out ball milling for 24 hours, and standing for 12 hours to obtain porous material slurry;
2) Printing the porous material slurry on an isolation barrier zirconia substrate by adopting a screen printing technology, standing for 15 minutes at normal temperature for leveling, and baking for 50 minutes at 50 ℃;
3) Preparing a raw blank of the sensitive element of the nitrogen-oxygen sensor by laminating a plurality of layers of zirconia substrates by adopting a lamination process;
4) Placing the nitrogen-oxygen sensor sensitive element green blank in a glue discharging furnace, and discharging glue at 300 ℃;
5) And placing the green blank of the nitrogen-oxygen sensor sensitive element after the rubber is removed in a sintering furnace, and calcining for 5 hours at 1400 ℃ to obtain the nitrogen-oxygen sensor sensitive element.
Example 3
1) Weighing Al 2 O 3 The preparation method comprises the following steps of pouring 216g of powder, 26g of YSZ powder, 24g of graphite, 210g of terpineol, 2g of ethyl cellulose and 2g of dioctyl terephthalate into a ball milling tank, carrying out ball milling for 24 hours, and standing for 12 hours to obtain porous material slurry;
2) Printing the porous material slurry on an isolation barrier zirconia substrate by adopting a screen printing technology, standing for 15 minutes at normal temperature for leveling, and baking for 40 minutes at 60 ℃;
3) Preparing a raw blank of the sensitive element of the nitrogen-oxygen sensor by laminating a plurality of layers of zirconia substrates by adopting a lamination process;
4) Placing the nitrogen-oxygen sensor sensitive element green blank in a glue discharging furnace, and discharging glue at 300 ℃;
5) And placing the crude blank of the nitrogen-oxygen sensor sensitive element after the rubber is removed in a sintering furnace, and calcining at 1450 ℃ for 4.5h to obtain the nitrogen-oxygen sensor sensitive element.
Comparative example 1
Weighing Al in step 1) 2 O 3 200g of powder, 20g of YSZ powder, 10g of graphite, 220g of terpineol, 2g of ethyl cellulose and 2g of dioctyl terephthalate are poured into a ball milling tank, ball milling is carried out for 24 hours, and standing is carried out for 12 hours to obtain porous material slurry; the other steps are the same as in example 1.
Comparative example 2
Weighing Al in step 1) 2 O 3 200g of powder, 20g of YSZ powder, 30g of graphite, 220g of terpineol, 2g of ethyl cellulose and 2g of dioctyl terephthalate are poured into a ball milling tank, ball milling is carried out for 24 hours, and standing is carried out for 12 hours to obtain porous material slurry; the other steps are the same as in example 1.
Experimental example 1 porosity test
The porosity test adopts an alumina porosity tester (AU-300 VP scientific), the element is placed in a measuring table, the air weight is measured, the element is subjected to impregnation saturation treatment, the element is placed in the measuring table, the product quality after the impregnation saturation is measured, finally the element is placed in water, the weight of the element in the water after the impregnation saturation is measured, and the porosity is automatically obtained by a machine. Examples 1-3 all gave porosities in the range of 15-18%, whereas comparative example 1 had only 11% porosity and comparative example 2 had 23% porosity.
Experimental example 2 limiting Current test
The samples prepared in examples 1 to 3 and the samples prepared in comparative examples 1 to 2 were taken 8 each, and a limiting current test was performed to determine the maximum value of the current that the samples could reach when the heating voltage was increased to 10V. The limiting current of the sample obtained in the example 1-3 is measured in the range of 2.8-3.5mA, wherein the test result of the example 1 is shown in FIG. 2. The test value of the sample limiting current range of the comparative example 1 is 1.8-3.0 mA, the test result of the sample limiting current of the comparative example 2 is shown in figure 3, the range is 2.9-4.6 mA, and the wave band range of the limiting current of the comparative examples 1-2 is obviously larger than that of the examples 1-3, so that the nitrogen oxygen sensor sensitive element prepared by the examples 1-3 has stable air input and more stable electrical property.
Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that changes, modifications, substitutions and alterations can be made in these embodiments without departing from the principles and spirit of the invention, the scope of which is defined in the appended claims and their equivalents.
Claims (10)
1. A nitrogen-oxygen sensor porous material is characterized by comprising the following components in parts by weight: al (Al) 2 O 3 9.5 to 10.8 portions of powder, 0.8 to 1.3 portions of YSZ powder, 0.8 to 1.3 portions of graphite powder, 10.3 to 11.8 portions of terpineol, 0.1 to 0.2 portion of ethyl cellulose and 0.1 to 0.2 portion of dioctyl terephthalate.
2. The porous material of the nitrogen oxygen sensor of claim 1, comprising in parts by weight: al (Al) 2 O 3 10 parts of powder, 1 part of YSZ powder, 1 part of graphite powder, 11 parts of terpineol, 0.1 part of ethyl cellulose and 0.1 part of dioctyl terephthalate.
3. The nitroxide sensor porous material of claim 1, wherein the viscosity ranges from 200 to 300 Pa-s.
4. A preparation method of a sensitive element of a nitrogen-oxygen sensor is characterized by comprising the following steps:
s1, weighing the components in the claim 1 in proportion, and standing after ball milling to obtain slurry;
s2, printing the slurry on an isolation barrier zirconia substrate, leveling at normal temperature, and drying;
s3, preparing a green body by laminating a plurality of layers of zirconia substrates, and discharging glue;
s4, calcining the green blank subjected to rubber discharge at 1400-1470 ℃ for 4-5h to obtain the sensitive element of the nitrogen-oxygen sensor.
5. The method of claim 4, wherein the drying process in step S2 is performed at 50-70 ℃ for 20-60min.
6. The method of claim 4, wherein the step S3 of discharging the gel is performed at 300 ℃.
7. The sensor of claim 4, wherein the thickness of the printing film is 18um.
8. The nitroxide sensor sensing element of claim 7, wherein the electrode material porosity is 15-18%.
9. The sensor of claim 7 wherein the limiting current is 2.8-3.5mA.
10. Use of a porous material according to any one of claims 1 to 3 or a method for producing a sensitive element of a nitroxide sensor according to any one of claims 4 to 9 for the production of a nitroxide sensor.
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2002293646A (en) * | 2001-03-31 | 2002-10-09 | Ngk Spark Plug Co Ltd | Green ceramic sheet for sensor device and manufacturing method thereof |
| US20080277043A1 (en) * | 2007-05-08 | 2008-11-13 | Nippon Soken, Inc | Method of adjusting firing profile of alumina material and method of manufacturing ceramic stack body |
| 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 |
| CN113683403A (en) * | 2021-08-18 | 2021-11-23 | 浙江光达电子科技有限公司 | Alumina slurry for nitrogen-oxygen sensor and preparation method thereof |
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Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2002293646A (en) * | 2001-03-31 | 2002-10-09 | Ngk Spark Plug Co Ltd | Green ceramic sheet for sensor device and manufacturing method thereof |
| US20080277043A1 (en) * | 2007-05-08 | 2008-11-13 | Nippon Soken, Inc | Method of adjusting firing profile of alumina material and method of manufacturing ceramic stack body |
| 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 |
| CN113683403A (en) * | 2021-08-18 | 2021-11-23 | 浙江光达电子科技有限公司 | Alumina slurry for nitrogen-oxygen sensor and preparation method thereof |
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