CN1183395A - Thermal insulation shock-absorbing composite material - Google Patents
Thermal insulation shock-absorbing composite material Download PDFInfo
- Publication number
- CN1183395A CN1183395A CN 97118967 CN97118967A CN1183395A CN 1183395 A CN1183395 A CN 1183395A CN 97118967 CN97118967 CN 97118967 CN 97118967 A CN97118967 A CN 97118967A CN 1183395 A CN1183395 A CN 1183395A
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- China
- Prior art keywords
- matrix material
- inorganic adhesive
- powder
- ceramic fiber
- silicate
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- C—CHEMISTRY; METALLURGY
- C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
- C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
- C04B28/00—Compositions of mortars, concrete or artificial stone, containing inorganic binders or the reaction product of an inorganic and an organic binder, e.g. polycarboxylate cements
- C04B28/24—Compositions of mortars, concrete or artificial stone, containing inorganic binders or the reaction product of an inorganic and an organic binder, e.g. polycarboxylate cements containing alkyl, ammonium or metal silicates; containing silica sols
- C04B28/26—Silicates of the alkali metals
-
- C—CHEMISTRY; METALLURGY
- C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
- C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
- C04B2201/00—Mortars, concrete or artificial stone characterised by specific physical values
- C04B2201/20—Mortars, concrete or artificial stone characterised by specific physical values for the density
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- Chemical & Material Sciences (AREA)
- Engineering & Computer Science (AREA)
- Ceramic Engineering (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Inorganic Chemistry (AREA)
- Materials Engineering (AREA)
- Structural Engineering (AREA)
- Organic Chemistry (AREA)
- Catalysts (AREA)
- Exhaust Gas After Treatment (AREA)
Abstract
An insulating and damping composite material is comprised of aluminium silicate or zirconium silicate ceramic fibre, vermiculite powder and inorganic adhesive, and features that it can thermally expand beginning from 200 deg. C. When temp is 700 deg. C, its thickness is expanded by more than 3 times. Its another advantages are very high elasticity and high temp (1100 deg. C) resistance. It can be used as honeycomb ceramic carrier of catalytic converter for car tail gas.
Description
The present invention relates to a kind of thermal insulation shock-absorbing composite material and preparation method thereof.Matrix material of the present invention is specially adapted to the heat-insulating and shock-absorbing of honeycomb ceramic carrier in the automotive exhaust catalysis transmodulator.
In recent years, the improvement of the topsoil that motor vehicle exhaust is caused along with people's pay attention to day by day, the automotive exhaust catalysis converter technology has also obtained popularization.The automotive exhaust catalysis transmodulator mainly is made of the ceramic honey comb of metal shell and appendix catalyzer, and working temperature is 150-800 ℃.But the anti-mechanical shock of ceramic honey comb and vibrations poor-performing, cracky, thus influence the result of use and the life-span of catalyst.At present existing many about how preventing the cushion technique of ceramic honey comb breakage, as US3,441,381, US3,441,382, US4,693,338 and UK2,171, patents such as 180A and ZL9520023.7.The employing heating resisting metal ripple net that these achievements in research have is coated on the outside of ceramic honey comb, and can play certain damping effect, but not have heat insulation use, and also the slit between ceramic honey comb and the metal shell, poorly sealed, gas leakage easily.The single ceramic fiber material of employing is also arranged as the ceramic honey comb in the fixed catalytic transmodulator, its method is elastic ceramic fiber material, and is tightly jammed between metal shell and ceramic honey comb, reaches the damping effect of heat insulation.But because the thermal expansivity of ceramic honey comb and metal shell has very big difference, under differing temps,, can cause the loosening of ceramic fiber material and come off, cause the breakage of ceramic honey comb along with the vibrations and the deflated of running car impacts.The installation effectiveness of this method is low in addition, is not suitable for big production and assembly.
The objective of the invention is to design 1100 ℃ of pyritous thermal insulation shock-absorbing composite materials of a kind of ability, be elasticity felted, this matrix material chance heat since 200 ℃ of expansions, during to 700 ℃, may expand to more than 3 times of material original thickness with temperature.Therefore this material is coated on the honeycomb ceramic carrier outside, can remedy the difference of thermal expansivity between metal shell and the ceramic honey comb, at catalyst internal fixing ceramic honey comb, plays the heat-insulating and shock-absorbing effect simultaneously.This matrix material also has very high resistance to air loss after expanding between metal shell and the ceramic honey comb, can not leak gas, and easy to assembly.
Thermal insulation shock-absorbing composite material of the present invention is by ceramic fiber, and unexpanded vermiculite and inorganic adhesive are formed, and are prepared from the paper pulp metallization processes.Ceramic fiber can be pure aluminium silicate or zirconium silicate fibre.This matrix material is the elasticity felted of laminate structure, and its volume density is 0.5 1 0.8g/cm3.As requested, can become thickness to this Composite Preparation is the specification of 2-8mm.
The preparation method of matrix material of the present invention is:
(1) inorganic adhesive in the matrix material of the present invention is to be the sodium silicate solution of 15-60% and aluminum oxide powder and the aluminium silicate powder that granularity is 40 1 70 μ m by concentration, by mixing together emulsion state.Sodium silicate solution, the part by weight between aluminum oxide powder and the aluminium silicate powder are 40-80: 10-40: 10-40.
(2) the unexpanded vermiculite processing powder is broken into the vermiculite power that granularity is 0.3-1mm.
(3) pure aluminium silicate or Zirconium silicate ceramic fiber are added in the water, mix and stir, making beating; Add inorganic adhesive that quantitatively prepares and the unexpanded vermiculite powder that processes at last, continue to stir and making beating.Ceramic fiber, the part by weight between vermiculite power and the inorganic adhesive is 45-65: 35-45: 8-15.
(4) the mixed serum that obtains by above-mentioned steps, remove moisture content with the method for vacuum filtration and press filtration, and, can obtain having laminate structure 80-150 ℃ of oven dry 3 hours down, be the thermal insulation shock-absorbing composite material of elasticity felted.This matrix material is specially adapted to the heat-insulating and shock-absorbing of ceramic honey comb in the automotive exhaust catalysis transmodulator.
Matrix material of the present invention is used for the heat-insulating and shock-absorbing of catalyst ceramic honey comb to be compared with the ceramic honey comb cushion technique of existing catalyst, has following advantage:
1. this matrix material that is installed in catalyst has the characteristic of meeting thermal expansion; Since 200 ℃ of expansions, during to 700 ℃, matrix material is expanded to more than 3 times of original thickness, thereby tightly fixes the intravital ceramic honey comb of catalyst metal casing, plays good heat-insulating and shock-absorbing effect.
2. be installed in after the matrix material expansion in the catalyst, can between metal shell and ceramic honey comb, form very high resistance to air loss, waste gas can not leaked gas from the slit.
3. because of this matrix material does not contain organic tackiness agent, thus when catalyst is worked, can not produce organic burning, thus avoid the increase of automobile background discharging.
4. use this matrix material assembling catalyst very convenient, can improve the efficiency of assembling that catalyst is produced greatly, reduce production costs.
Matrix material of the present invention will be further specified by following embodiment, and certain described embodiment limits the present invention.
Embodiment
With granularity is aluminum oxide powder and each 25g of aluminium silicate powder of 50 μ m, being added to concentration at 70: 15: 15 by the part by weight between sodium silicate solution and aluminum oxide powder and the aluminium silicate powder is in 50% the sodium silicate solution, constantly stir, until forming uniform emulsion state liquid, promptly obtain the inorganic adhesive in the matrix material of the present invention.
The 750g aluminum silicate fiber is added in the water of 6000g, constantly stirs, making beating.To being even pulpous state, add the average powder of 600g then and directly be the unexpanded vermiculite powder of 0.7mm and the inorganic adhesive that has prepared, continue to stir, pull an oar.After being even pulpous state mixing liquid, be as the criterion with the thick matrix material of preparation 3mm, by vacuum filtration and press filtration, remove moisture content, dried 3 hours down at 100 ℃, can obtain thickness is the matrix material of the present invention of the elasticity felted of 3mm.
The matrix material that obtains thus carries out refractoriness test, but 1100 ℃ of heatproofs;
Carry out the test of this matrix material with the temperature expansion performance simultaneously, its result is as follows: temperature (℃) room temperature 150 200 250 300 350 400 500 600 700 thickness (mm) starting material thickness 33 3.3 3.8 79 9.5 9.8 10.2 10.5
Matrix material of the present invention is coated on the ceramic honey comb, is assembled to catalyst, be installed to then on the automobile, carry out 30,000 kilometers preventing tests after, dissect catalyst, ceramic honey comb is still excellent.
Claims (9)
1. a thermal insulation shock-absorbing composite material is by ceramic fiber, and vermiculite power and inorganic adhesive are formed, and it is characterized in that:
Described matrix material is a ceramic fiber, and the uniform mixing of vermiculite power and inorganic adhesive forms laminate structure, is elasticity felted, and its volume density is 0.5-0.8g/cm3.
2. according to the matrix material of claim 1, wherein ceramic fiber is aluminum silicate fiber or zirconium silicate fibre.
3. according to the matrix material of claim 1, wherein vermiculite power is last expanded vermiculite powder, and its particle size is 0.3-1mm.
4. according to the matrix material of claim 1, wherein inorganic adhesive is by sodium silicate solution, and aluminum oxide powder and aluminium silicate powder mixed preparing form.
5. according to the matrix material of claim 4, the concentration of inorganic adhesive mesosilicic acid sodium solution is 15-60%.
6. according to the matrix material of claim 4, the granularity of aluminum oxide powder and aluminium silicate powder is 40-70 μ m in the inorganic adhesive.
7. according to the matrix material of claim 4, the part by weight between inorganic adhesive mesosilicic acid sodium solution, aluminum oxide powder and the aluminium silicate powder is 40-80: 10-40: 10-40.
8. according to the matrix material of claim 1, ceramic fiber, the part by weight between vermiculite power and the inorganic adhesive are 45-65: 30-45: 5-25.
9. preparation comprises the steps: as the method for matrix material as described in the claim 1
A. with aluminum oxide powder, aluminium silicate powder joins in the sodium silicate solution, stirs, and is mixed with the inorganic adhesive of emulsion state.
B. the unexpanded vermiculite processing powder is broken into vermiculite power.
C. with pure aluminium silicate or Zirconium silicate ceramic fiber, be added to the water, mix, stir, making beating is until being the homogeneous phase paste liquid.
D. will be by steps A, inorganic adhesive that B obtains and unexpanded vermiculite powder join in the ceramic fiber paste liquid that is obtained by step C, mix and stir, and making beating by vacuum filtration and press filtration, removes moisture content to being homogeneous phase; Dried 1-3 hour down at 80-150 ℃, promptly obtain described matrix material.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 97118967 CN1183395A (en) | 1997-10-07 | 1997-10-07 | Thermal insulation shock-absorbing composite material |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 97118967 CN1183395A (en) | 1997-10-07 | 1997-10-07 | Thermal insulation shock-absorbing composite material |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN1183395A true CN1183395A (en) | 1998-06-03 |
Family
ID=5175093
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 97118967 Pending CN1183395A (en) | 1997-10-07 | 1997-10-07 | Thermal insulation shock-absorbing composite material |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN1183395A (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1317239C (en) * | 2001-05-25 | 2007-05-23 | 揖斐电株式会社 | Ceramic fiber, ceramic fiber complex and production method of aluminum oxide fiber complex |
| CN109180141A (en) * | 2018-08-31 | 2019-01-11 | 南通江山农药化工股份有限公司 | Alumina aerogels are insulated soft felt and its moulding process |
-
1997
- 1997-10-07 CN CN 97118967 patent/CN1183395A/en active Pending
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1317239C (en) * | 2001-05-25 | 2007-05-23 | 揖斐电株式会社 | Ceramic fiber, ceramic fiber complex and production method of aluminum oxide fiber complex |
| CN109180141A (en) * | 2018-08-31 | 2019-01-11 | 南通江山农药化工股份有限公司 | Alumina aerogels are insulated soft felt and its moulding process |
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| C01 | Deemed withdrawal of patent application (patent law 1993) | ||
| WD01 | Invention patent application deemed withdrawn after publication |