CN107542536A - Oval oxidation-resistant ceramic honeycomb substrate - Google Patents
Oval oxidation-resistant ceramic honeycomb substrate Download PDFInfo
- Publication number
- CN107542536A CN107542536A CN201610481240.7A CN201610481240A CN107542536A CN 107542536 A CN107542536 A CN 107542536A CN 201610481240 A CN201610481240 A CN 201610481240A CN 107542536 A CN107542536 A CN 107542536A
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- CN
- China
- Prior art keywords
- next door
- stomata
- honeycomb substrate
- ceramic honeycomb
- resistant ceramic
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
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- Exhaust Gas Treatment By Means Of Catalyst (AREA)
Abstract
The present invention relates to a kind of oval oxidation-resistant ceramic honeycomb substrate.It includes being densely covered with stomata in the axial direction in the cylindrical body of elliptical cylinder-shape, cylindrical body（1）, stomata（1）One end be opening（6）, the other end is provided with closure face（2）, block face（2）And opening（6）Arranged for interval, two neighboring stomata（1）It is provided with next door（3）, next door（3）On be provided with cellular micropore（4）, next door（3）It is upper to be coated with catalyst coat（7）, ceramic honey comb surface is coated with antioxidant coating.A kind of oval oxidation-resistant ceramic honeycomb substrate of the present invention, anti-oxidant, good integrity, increases filter area to greatest extent in the confined space, and easy for installation, good purification；Micropore on next door can effectively filter the black smoke particle in waste gas, and black smoke particle can be burned off in the presence of catalyst coat, further increase tail gas clean-up effect.
Description
Technical field
The present invention relates to a kind of oval oxidation-resistant ceramic honeycomb substrate, for purifying vehicle exhaust.Belong to Ceramic manufacturing
Equipment technical field.
Background technology
At present, the automobile exhaust purifier of unobstructed application both at home and abroad, its catalyst carrier are typically all carried using ceramic honeycomb
Body, this carrier are to add adhesive with synthesis of dichroite raw material, burn and lose agent, blended spice, pugging, extrusion, drying, sintering,
Then impregnated catalyst re-dry is made.In use, it is put into exhaust purifier metal shell stage casing.
Conventional ceramic honeycomb carrier is generally square cylinder, and it is net that the ceramic honeycomb carrier of such a shape is loaded into tail gas
When changing in the metal shell of device, often cause the space between ceramic honeycomb carrier and metal shell big so that tail gas clean-up
Device can not effectively utilize the space of automobile chassis, and some producers can add the pottery of small dimension to plug the gap in gap
Porcelain honeycomb substrate, this can cause the globality poor of the ceramic honeycomb carrier in metal-back, increase the resistance during vent gas treatment,
Tail gas clean-up effect is reduced, and honeycomb substrate is when mounted, complex operation, and efficiency is low；The gas of such a honeycomb substrate simultaneously
Hole is clear opening, poor to the waste gas purification effect containing black smoke particle.
Existing honeycomb substrate can not be effectively anti-oxidant, can not meet the needs of client.
The content of the invention
It is an object of the invention to overcome above-mentioned deficiency, there is provided a kind of oval oxidation-resistant ceramic honeycomb substrate, this pottery
Porcelain honeycomb substrate good integrity, good purification and easy for installation, honeycomb substrate can be effectively anti-oxidant.
The object of the present invention is achieved like this：
A kind of oval oxidation-resistant ceramic honeycomb substrate, including cylindrical body, feature be：The cylindrical body is in elliptical cylinder-shape,
The cylindrical body is densely covered with stomata in the axial direction, and one end of the stomata is opening, and the other end is provided with closure face, described
Closure face and open space arrangement, the two neighboring stomata are provided with next door, are provided with next door in cellular micropore, next door
Upper to be coated with catalyst coat, the surface of the ceramic honey comb is coated with antioxidant coating, and the antioxidant coating includes 11-
14wt% chromium, 11-14wt% cobalt, 7.5-9.5wt% aluminium, 0.20-0.60wt% yttrium, 0.10-0.50wt% hafnium, 0.10-
The nickel of 0.30wt% silicon, 0.10-0.20wt% zirconium and surplus.
A kind of oval oxidation-resistant ceramic honeycomb substrate of the present invention, the hole count of its stomata is 600 holes/square inch.
A kind of oval oxidation-resistant ceramic honeycomb substrate of the present invention, the thickness in its next door is 0.13 ~ 0.14mm.
Compared with prior art, the beneficial effects of the invention are as follows：
A kind of oval oxidation-resistant ceramic honeycomb substrate of the present invention, good integrity, increased to greatest extent in the confined space
Filtering surface accumulates, and easy for installation, good purification；Micropore on next door can effectively filter the black smoke particle in waste gas, and urge
Black smoke particle can be burned off in the presence of agent coating, further increase tail gas clean-up effect；Ceramic honey comb surface coats
There is antioxidant coating, can effectively prevent ceramic honey comb surface to be oxidized.
Brief description of the drawings
Fig. 1 is a kind of structural representation of oval oxidation-resistant ceramic honeycomb substrate of the present invention.
Fig. 2 is a kind of partial axial section figure of oval oxidation-resistant ceramic honeycomb substrate of the present invention.
Fig. 3 is the structural representation in the next door of the present invention.
In figure：
Stomata 1,
Closure face 2,
Next door 3,
Micropore 4,
Tail gas 5,
Opening 6,
Catalyst coat 7.
Embodiment
Referring to Fig. 1-3, the present invention relates to a kind of oval oxidation-resistant ceramic honeycomb substrate, and it includes the post in elliptical cylinder-shape
Shape body, the cylindrical body are densely covered with stomata 1 in the axial direction, and one end of the stomata 1 is opening 6, and the other end is provided with
Closure face 2, the closure face 2 and the arranged for interval of opening 6, the two neighboring stomata 1 are provided with next door 3, are provided with next door 3 and are in
Cellular micropore 4, catalyst coat 7 is coated with next door 3.
Wherein, the hole count of stomata 1 is 600 holes/square inch, and the thickness in next door 3 is 0.13 ~ 0.14mm.
The surface of the ceramic honey comb is coated with antioxidant coating, the antioxidant coating include 11-14wt% chromium,
11-14wt% cobalt, 7.5-9.5wt% aluminium, 0.20-0.60wt% yttrium, 0.10-0.50wt% hafnium, 0.10-0.30wt%
The nickel of silicon, 0.10-0.20wt% zirconium and surplus.It can be noted that it has the aluminium content reduced from above-mentioned composition,
This reduces SRZ formation in the alloy for be easily formed SRZ.
More aluminium may produce reaction zone problem in antioxidant coating, and less aluminium can not provide enough aluminium
Maintain good protection class.Less active element（Y, Hf, Si and Zr）Oxidation kinetics may be improved, and it is more active
Element may result in short-circuit oxidation.More chromium may reduce leading phase, γ phases（gamma prime）, and less chromium
Corrosion and heat resistant may be damaged.Extremely suitable composition for antioxidant coating is located exactly among above range.
Operation principle：The present invention is fabricated to honeycomb ceramic carrier using cordierite, and is built in diesel engine vent gas purification
In device, the waste gas with black smoke particle of diesel engine discharge enters from the opening 6 of stomata 1, because stomata 1 is opened at one end
Mouthfuls 6, and be then closure face 2 in the other end, therefore waste gas can be by the next door 3 with micropore 4, then opening from adjacent air holes 1
Mouth 6 is discharged, and because the diameter of black smoke particle is big compared with micropore 4, therefore the black smoke particle in waste gas will catch next door 3 by filtering
On, air-flow then passes through from micropore 4.
Active rare earth of the catalyst coat 7 containing noble metal, Main Ingredients and Appearance have Pt, Pd, Rh, Al2O3、Ce、La、Zr、
Cu, Mn, the waste gas of diesel combustion（The predominantly pernicious gas such as CO, HC, NOx）During through micropore 4, urging on next door 3 is coated
Agent coating 7 will strengthen CO, HC, NOxThe activity of three kinds of gas, it is promoted to carry out certain oxidationreduction chemical reaction, wherein
CO is oxidized to colourless nontoxic carbon dioxide at high temperature, and HC compounds resolve into water at high temperature（H2O）And titanium dioxide
Carbon, NOxIt is reduced into nitrogen and oxygen.
When diesel exhaust gas temperature reaches 375 degrees Celsius, in the presence of catalyst coat 7, the black smoke on next door 3
Particle can progressively burn and aoxidize, and the purifying rate of black smoke particle about reaches more than 85%, when reaction temperature reaches 500 degrees Celsius
When catalyst and black smoke particle reaction fall so as to completely burned（Catalysis burning）, now the purifying rate of black smoke particle up to 90% with
On.
Claims (3)
1. a kind of oval oxidation-resistant ceramic honeycomb substrate, including cylindrical body, it is characterised in that：The cylindrical body is in ellipse
Cylindricality, the cylindrical body are densely covered with stomata in the axial direction（1）, the stomata（1）One end be opening（6）, the other end sets
The closure face of being equipped with（2）, the closure face（2）And opening（6）Arranged for interval, the two neighboring stomata（1）It is provided with next door
（3）, next door（3）On be provided with cellular micropore（4）, next door（3）It is upper to be coated with catalyst coat（7）, the ceramic honey comb
Surface is coated with antioxidant coating, and the antioxidant coating includes 11-14wt% chromium, 11-14wt% cobalt, 7.5-9.5wt%
Aluminium, 0.20-0.60wt% yttrium, 0.10-0.50wt% hafnium, 0.10-0.30wt% silicon, 0.10-0.20wt% zirconium and
The nickel of surplus.
A kind of 2. oval oxidation-resistant ceramic honeycomb substrate according to claim 1, it is characterised in that：The stomata（1）
Hole count be 600 holes/square inch.
A kind of 3. oval oxidation-resistant ceramic honeycomb substrate according to claim 1 or 2, it is characterised in that：The next door
（3）Thickness be 0.13 ~ 0.14mm.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610481240.7A CN107542536A (en) | 2016-06-28 | 2016-06-28 | Oval oxidation-resistant ceramic honeycomb substrate |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610481240.7A CN107542536A (en) | 2016-06-28 | 2016-06-28 | Oval oxidation-resistant ceramic honeycomb substrate |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN107542536A true CN107542536A (en) | 2018-01-05 |
Family
ID=60961289
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201610481240.7A Pending CN107542536A (en) | 2016-06-28 | 2016-06-28 | Oval oxidation-resistant ceramic honeycomb substrate |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN107542536A (en) |
-
2016
- 2016-06-28 CN CN201610481240.7A patent/CN107542536A/en active Pending
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| WD01 | Invention patent application deemed withdrawn after publication | ||
| WD01 | Invention patent application deemed withdrawn after publication |
Application publication date: 20180105 |