CN207007765U - A kind of nitrogen oxide sensor of electrode covering Woelm Alumina - Google Patents
A kind of nitrogen oxide sensor of electrode covering Woelm Alumina Download PDFInfo
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- CN207007765U CN207007765U CN201720909587.7U CN201720909587U CN207007765U CN 207007765 U CN207007765 U CN 207007765U CN 201720909587 U CN201720909587 U CN 201720909587U CN 207007765 U CN207007765 U CN 207007765U
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Abstract
The utility model discloses a kind of nitrogen oxide sensor of electrode covering Woelm Alumina, its zirconia base includes stacking gradually first, second, third and fourth 5 zirconia ceramic layers of arrangement from top to bottom, air inlet, first chamber, second chamber are set inside zirconia base between first and third zirconia ceramic layer, between air inlet and first chamber, the second diffusion barrier is set respectively between first chamber and second chamber；Oxygen pump is set in first chamber, and oxygen pump includes main pump electrode, public electrode；Measuring pump is set in second chamber, and measuring pump includes measuring electrode, and the surface of measuring electrode is covered with the porous alumina layer formed through high temperature sintering；The lower surface of 3rd zirconia ceramic layer is provided with reference electrode.By said structure design, the utility model has the advantages of novel in structural design, measurement accuracy is high, and can be effectively prevented from platinum and pollute and ensure measurement accuracy.
Description
Technical field
It the utility model is related to nitrogen oxide sensor technical field, more particularly to a kind of nitrogen oxygen of electrode covering Woelm Alumina
Sensor.
Background technology
The waste gas caused by the burning fuel of air oxidant source, usually contain a small amount of but noticeable various
Nitrogen oxides（Nitric oxide, nitrogen dioxide etc.）, it is referred to as nitrogen oxides.Wherein, nitrogen oxides can not only damage the ozone layer, and turn
Acid rain is melted into, and is easily acted in the sun with hydrocarbon or volatile organic matter, photochemical fog is produced, causes respiratory tract
Disease, existence and the health of the serious threat mankind.
With the development of society, the quantity of motor vehicles is more and more, and the tail gas of motor vehicles includes a variety of discharges
Thing, such as nitrogen oxides, particulate matter etc..For environmental protection, the discharge of motor vehicles nuisance is reduced, by using such as urging
Change the exhaust gas system control discharge of converter；Certainly, it is also necessary to multiple gases sensor, including nitrogen oxide sensor, be used for
The content of nitrogen oxides in detection exhaust.
Wherein, the nitrogen oxide sensor of existence form various kinds in the prior art；However, for existing nitrogen oxide sensor and
Speech, during the use of reality, its generally existing designs the defects of unreasonable, measurement accuracy is not high.
Utility model content
The purpose of this utility model is to provide a kind of electrode covering Woelm Alumina in view of the shortcomings of the prior art
Nitrogen oxide sensor, the electrode cover the nitrogen oxide sensor novel in structural design of Woelm Alumina, and can be effectively prevented from platinum dirt
Contaminate and ensure measurement accuracy.
To reach above-mentioned purpose, the utility model is achieved through the following technical solutions.
A kind of nitrogen oxide sensor of electrode covering Woelm Alumina, includes zirconia base, zirconia base includes
The first zirconia ceramic layer of arrangement, the second zirconia ceramic layer, the 3rd zirconia ceramic layer, the 4th are stacked gradually from top to bottom
Zirconia ceramic layer, the 5th zirconia ceramic layer, the inside of zirconia base is in the first zirconia ceramic layer and the 3rd zirconium oxide
Air inlet, first chamber, second chamber are provided between ceramic layer, the first diffusion is provided between air inlet and first chamber
Barrier, is provided with the second diffusion barrier between first chamber and second chamber；
It is provided with oxygen pump in first chamber, oxygen pump, which includes, to be arranged at the first zirconia ceramic layer lower surface and stretch to
Main pump electrode in one chamber, the public electrode for being arranged at the first zirconia ceramic layer upper surface, main pump electrode are mixed by platinum, gold
Slurry is printed in the first zirconia ceramic layer lower surface and formed；
Measuring pump is provided with second chamber, measuring pump, which includes, to be arranged at the 3rd zirconia ceramic layer upper surface and stretch into
Measuring electrode in second chamber, measuring electrode the 3rd zirconia ceramic layer upper surface is printed in by platinum, rhodium mixed slurry and
Formed, the surface of measuring electrode is covered with the porous alumina layer formed through high temperature sintering；Under 3rd zirconia ceramic layer
Surface is provided with reference electrode.
Wherein, the lower surface of first zirconia ceramic layer is provided with the auxiliary pump electricity stretched in the second chamber
Pole, auxiliary pump electrode are printed in the first zirconia ceramic layer lower surface by platinum, golden mixed slurry and formed.
Wherein, having heaters is set between the 4th zirconia ceramic layer and the 5th zirconia ceramic layer.
The beneficial effects of the utility model are：A kind of nitrogen oxygen of electrode covering Woelm Alumina described in the utility model passes
Sensor, it includes zirconia base, and zirconia base includes the first zirconia ceramics for stacking gradually arrangement from top to bottom
Layer, the second zirconia ceramic layer, the 3rd zirconia ceramic layer, the 4th zirconia ceramic layer, the 5th zirconia ceramic layer, zirconium oxide
The inside of matrix is provided with air inlet, first chamber, second between the first zirconia ceramic layer and the 3rd zirconia ceramic layer
Chamber, is provided with the first diffusion barrier between air inlet and first chamber, the second expansion is provided between first chamber and second chamber
Dissipate barrier；It is provided with oxygen pump in first chamber, oxygen pump, which includes, to be arranged at the first zirconia ceramic layer lower surface and stretch to first
Main pump electrode in chamber, the public electrode for being arranged at the first zirconia ceramic layer upper surface, main pump electrode is by platinum, golden mixing slurry
Material is printed in the first zirconia ceramic layer lower surface and formed；Measuring pump is provided with second chamber, measuring pump includes setting
In the 3rd zirconia ceramic layer upper surface and the measuring electrode that stretches in second chamber, measuring electrode is by platinum, rhodium mixed slurry
It is printed in the 3rd zirconia ceramic layer upper surface and is formed, the surface of measuring electrode is porous covered with what is formed through high temperature sintering
Alumina layer；The lower surface of 3rd zirconia ceramic layer is provided with reference electrode.Pass through said structure design, the utility model tool
There is the advantages of novel in structural design, measurement accuracy is high, and platinum can be effectively prevented from and pollute and ensure measurement accuracy.
Brief description of the drawings
The utility model is further detailed below with accompanying drawing, but the embodiment in accompanying drawing is not formed pair
Any restrictions of the present utility model.
Fig. 1 is structural representation of the present utility model.
Include in Fig. 1：
1 --- zirconia base 11 --- first zirconia ceramic layer
12 --- the second zirconia ceramic layer 13 --- the 3rd zirconia ceramic layers
14 --- the 4th zirconia ceramic layer 15 --- the 5th zirconia ceramic layers
21 --- air inlet 22 --- first chambers
23 --- second chamber 31 --- first diffusion barriers
32 --- the second diffusion barrier 41 --- main pump electrodes
42 --- public electrode 43 --- measuring electrodes
44 --- reference electrode 45 --- auxiliary pump electrodes
5 --- porous alumina layer 6 --- heaters.
Embodiment
The utility model is illustrated with reference to specific embodiment.
As shown in figure 1, a kind of nitrogen oxide sensor of electrode covering Woelm Alumina, includes zirconia base 1, zirconium oxide
Matrix 1 includes the first zirconia ceramic layer 11 for stacking gradually arrangement from top to bottom, the second zirconia ceramic layer 12, the 3rd oxygen
Change zircon ceramic layer 13, the 4th zirconia ceramic layer 14, the 5th zirconia ceramic layer 15, the inside of zirconia base 1 is in the first oxygen
Change and be provided with air inlet 21, first chamber 22, second chamber 23, air inlet between zircon ceramic layer 11 and the 3rd zirconia ceramic layer 13
The first diffusion barrier 31 is provided between mouth 21 and first chamber 22, the second expansion is provided between first chamber 22 and second chamber 23
Dissipate barrier 32.
Further, oxygen pump is provided with first chamber 22, oxygen pump, which includes, to be arranged under the first zirconia ceramic layer 11
Surface and stretch in first chamber 22 main pump electrode 41, be arranged at the public electrode of the upper surface of the first zirconia ceramic layer 11
42, main pump electrode 41 is printed in the lower surface of the first zirconia ceramic layer 11 by platinum, golden mixed slurry and formed.
Further, measuring pump is provided with second chamber 23, measuring pump, which includes, is arranged at the 3rd zirconia ceramics
13 upper surface of layer and the measuring electrode 43 that stretches in second chamber 23, measuring electrode 43 are printed in the by platinum, rhodium mixed slurry
The upper surface of three zirconia ceramic layer 13 and formed, the surface of measuring electrode 43 is covered with the porous oxidation formed through high temperature sintering
Aluminium lamination 5；The lower surface of 3rd zirconia ceramic layer 13 is provided with reference electrode 44.
It should further be noted that the lower surface of the first zirconia ceramic layer 11 is provided with the auxiliary pump stretched in second chamber 23
Electrode 45, auxiliary pump electrode 45 are printed in the lower surface of the first zirconia ceramic layer 11 by platinum, golden mixed slurry and formed.
In addition, having heaters 6 is set between the 4th zirconia ceramic layer 14 and the 5th zirconia ceramic layer 15.
During utility model works, heater 6 carries out auxiliary heating, and under the high temperature conditions, main pump electrode 41
Apply voltage between public electrode 42, by the oxygen pump structure that main pump electrode 41, public electrode 42 are formed by first chamber 22
In oxygen pump out outside chamber, in the process, the nitrogen dioxide measured in gas runs into Pt electrodes in first chamber 22 and can sent out
Biochemical reaction, and nitrogen dioxide resolves into nitric oxide and oxygen.
In second chamber 23, apply voltage between auxiliary pump electrode 45 and public electrode 42, will further measure gas
In oxygen content reduce to zero, under the high temperature conditions, measurement gas touches measuring electrode 43 in second chamber 23, due to
The catalytic action of platinum, rhodium can be chemically reacted, i.e., nitric oxide can be decomposed in nitrogen and oxygen, in measuring electrode 43 and public
Applying voltage between electrode 42 can all pump out the oxygen of decomposition outside chamber, and the process of oxonium ion migration can produce an electric current
IP2, the content of oxygen is drawn by the size of electric current, so as to obtain the content of oxynitrides.
It need to be explained further, due to the presence of gold, the ability that rhodium decomposes oxygen can decline, and the precision of measurement will be impacted；
The utility model both can guarantee that measuring electrode 43 and gas by printing one layer of structure of porous alumina layer 5 in measuring electrode 43
Contact, also due to porous alumina layer 5 has good high temperature electrical insulating property, can guarantee that gold element can not touch measurement electricity
Pole 43.Further, since the high temperature electrical insulating property of porous alumina layer 5 is fine, the oxonium ion in measuring electrode 43 can not be run out of, only
Chamber can be pumped out from fixed one side, so ensures that the degree of accuracy of oxygen measurement, so as to ensure that oxynitrides thing measures
The degree of accuracy.
From the above situation, it can be seen that, by said structure design, the utility model has novel in structural design, measurement accuracy
The advantages of high, and platinum can be effectively prevented from and pollute and ensure measurement accuracy.
Above content is only preferred embodiment of the present utility model, for one of ordinary skill in the art, according to this reality
With new thought, there will be changes, this specification content should not be construed as in specific embodiments and applications
To limitation of the present utility model.
Claims (3)
- A kind of 1. nitrogen oxide sensor of electrode covering Woelm Alumina, it is characterised in that：Include zirconia base（1）, oxidation Zirconium base body（1）Include the first zirconia ceramic layer for stacking gradually arrangement from top to bottom（11）, the second zirconia ceramic layer （12）, the 3rd zirconia ceramic layer（13）, the 4th zirconia ceramic layer（14）, the 5th zirconia ceramic layer（15）, aoxidize zirconium base Body（1）Inside in the first zirconia ceramic layer（11）With the 3rd zirconia ceramic layer（13）Between be provided with air inlet（21）、 First chamber（22）, second chamber（23）, air inlet（21）With first chamber（22）Between be provided with the first diffusion barrier（31）, the One chamber（22）With second chamber（23）Between be provided with the second diffusion barrier（32）；First chamber（22）Oxygen pump is inside provided with, oxygen pump, which includes, is arranged at the first zirconia ceramic layer（11）Lower surface and stretch into To first chamber（22）Interior main pump electrode（41）, be arranged at the first zirconia ceramic layer（11）The public electrode of upper surface （42）, main pump electrode（41）First zirconia ceramic layer is printed in by platinum, golden mixed slurry（11）Lower surface and formed；Second chamber（23）Measuring pump is inside provided with, measuring pump, which includes, is arranged at the 3rd zirconia ceramic layer（13）Upper surface and Stretch to second chamber（23）Interior measuring electrode（43）, measuring electrode（43）3rd oxidation is printed in by platinum, rhodium mixed slurry Zircon ceramic layer（13）Upper surface and formed, measuring electrode（43）Surface covered with the Woelm Alumina formed through high temperature sintering Layer（5）；3rd zirconia ceramic layer（13）Lower surface be provided with reference electrode（44）.
- A kind of 2. nitrogen oxide sensor of electrode covering Woelm Alumina according to claim 1, it is characterised in that：Described One zirconia ceramic layer（11）Lower surface be provided with and stretch to the second chamber（23）Interior auxiliary pump electrode（45）, auxiliary pump electricity Pole（45）First zirconia ceramic layer is printed in by platinum, golden mixed slurry（11）Lower surface and formed.
- A kind of 3. nitrogen oxide sensor of electrode covering Woelm Alumina according to claim 1, it is characterised in that：Described Four zirconia ceramic layers（14）With the 5th zirconia ceramic layer（15）Between having heaters is set（6）.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201720909587.7U CN207007765U (en) | 2017-07-26 | 2017-07-26 | A kind of nitrogen oxide sensor of electrode covering Woelm Alumina |
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| CN201720909587.7U CN207007765U (en) | 2017-07-26 | 2017-07-26 | A kind of nitrogen oxide sensor of electrode covering Woelm Alumina |
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109709194A (en) * | 2019-03-13 | 2019-05-03 | 常州君堃电子有限公司 | Nitrogen oxides ammonia integral sensor |
| CN109709193A (en) * | 2019-03-13 | 2019-05-03 | 常州君堃电子有限公司 | Nitrogen oxides ammonia gas sensor |
| CN111141803A (en) * | 2020-01-14 | 2020-05-12 | 浙江百岸科技有限公司 | Nitrogen-oxygen sensor |
| CN113552201A (en) * | 2021-09-01 | 2021-10-26 | 浙江百岸科技有限公司 | Nitrogen-oxygen sensor chip with protective cap coating |
-
2017
- 2017-07-26 CN CN201720909587.7U patent/CN207007765U/en active Active
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109709194A (en) * | 2019-03-13 | 2019-05-03 | 常州君堃电子有限公司 | Nitrogen oxides ammonia integral sensor |
| CN109709193A (en) * | 2019-03-13 | 2019-05-03 | 常州君堃电子有限公司 | Nitrogen oxides ammonia gas sensor |
| CN111141803A (en) * | 2020-01-14 | 2020-05-12 | 浙江百岸科技有限公司 | Nitrogen-oxygen sensor |
| CN113552201A (en) * | 2021-09-01 | 2021-10-26 | 浙江百岸科技有限公司 | Nitrogen-oxygen sensor chip with protective cap coating |
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