CN102503533A - Method for preparing silicon carbide honeycomb ceramics - Google Patents
Method for preparing silicon carbide honeycomb ceramics Download PDFInfo
- Publication number
- CN102503533A CN102503533A CN2011103272019A CN201110327201A CN102503533A CN 102503533 A CN102503533 A CN 102503533A CN 2011103272019 A CN2011103272019 A CN 2011103272019A CN 201110327201 A CN201110327201 A CN 201110327201A CN 102503533 A CN102503533 A CN 102503533A
- Authority
- CN
- China
- Prior art keywords
- honeycomb ceramics
- silicon carbide
- preparation
- carbide honeycomb
- weight ratio
- 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.)
- Granted
Links
- 239000000919 ceramic Substances 0.000 title claims abstract description 71
- HBMJWWWQQXIZIP-UHFFFAOYSA-N silicon carbide Chemical compound [Si+]#[C-] HBMJWWWQQXIZIP-UHFFFAOYSA-N 0.000 title claims abstract description 40
- 229910010271 silicon carbide Inorganic materials 0.000 title claims abstract description 40
- 238000000034 method Methods 0.000 title claims abstract description 14
- 238000002360 preparation method Methods 0.000 claims abstract description 30
- 235000017166 Bambusa arundinacea Nutrition 0.000 claims abstract description 26
- 235000017491 Bambusa tulda Nutrition 0.000 claims abstract description 25
- 241001330002 Bambuseae Species 0.000 claims abstract description 25
- 235000015334 Phyllostachys viridis Nutrition 0.000 claims abstract description 25
- 239000011425 bamboo Substances 0.000 claims abstract description 25
- 239000003610 charcoal Substances 0.000 claims abstract description 25
- 238000001125 extrusion Methods 0.000 claims abstract description 22
- 239000000843 powder Substances 0.000 claims abstract description 21
- TWNQGVIAIRXVLR-UHFFFAOYSA-N oxo(oxoalumanyloxy)alumane Chemical compound O=[Al]O[Al]=O TWNQGVIAIRXVLR-UHFFFAOYSA-N 0.000 claims abstract description 19
- SIWVEOZUMHYXCS-UHFFFAOYSA-N oxo(oxoyttriooxy)yttrium Chemical compound O=[Y]O[Y]=O SIWVEOZUMHYXCS-UHFFFAOYSA-N 0.000 claims abstract description 18
- 238000005245 sintering Methods 0.000 claims abstract description 18
- 239000000463 material Substances 0.000 claims abstract description 14
- 239000000203 mixture Substances 0.000 claims abstract description 14
- 229920002472 Starch Polymers 0.000 claims abstract description 12
- 238000001035 drying Methods 0.000 claims abstract description 11
- 238000002156 mixing Methods 0.000 claims abstract description 11
- 235000019698 starch Nutrition 0.000 claims abstract description 9
- 239000008107 starch Substances 0.000 claims abstract description 9
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 8
- 238000003756 stirring Methods 0.000 claims abstract description 7
- 241000264877 Hippospongia communis Species 0.000 claims description 63
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N Silicium dioxide Chemical compound O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 claims description 42
- 235000012239 silicon dioxide Nutrition 0.000 claims description 21
- 239000000377 silicon dioxide Substances 0.000 claims description 21
- 235000015895 biscuits Nutrition 0.000 claims description 19
- 238000010438 heat treatment Methods 0.000 claims description 12
- 229920001592 potato starch Polymers 0.000 claims description 11
- 238000001914 filtration Methods 0.000 claims description 8
- 238000000746 purification Methods 0.000 claims description 8
- 239000002245 particle Substances 0.000 claims description 6
- AZHSSKPUVBVXLK-UHFFFAOYSA-N ethane-1,1-diol Chemical compound CC(O)O AZHSSKPUVBVXLK-UHFFFAOYSA-N 0.000 claims description 5
- 238000009413 insulation Methods 0.000 claims description 5
- 235000019890 Amylum Nutrition 0.000 claims description 3
- 241000196324 Embryophyta Species 0.000 claims description 3
- LFQSCWFLJHTTHZ-UHFFFAOYSA-N Ethanol Chemical compound CCO LFQSCWFLJHTTHZ-UHFFFAOYSA-N 0.000 abstract 2
- 239000004372 Polyvinyl alcohol Substances 0.000 abstract 1
- 230000032683 aging Effects 0.000 abstract 1
- 239000005416 organic matter Substances 0.000 abstract 1
- 229920002451 polyvinyl alcohol Polymers 0.000 abstract 1
- RMAQACBXLXPBSY-UHFFFAOYSA-N silicic acid Chemical compound O[Si](O)(O)O RMAQACBXLXPBSY-UHFFFAOYSA-N 0.000 abstract 1
- 239000002002 slurry Substances 0.000 abstract 1
- 238000012360 testing method Methods 0.000 description 8
- 239000011148 porous material Substances 0.000 description 7
- 238000005516 engineering process Methods 0.000 description 6
- QSHDDOUJBYECFT-UHFFFAOYSA-N mercury Chemical compound [Hg] QSHDDOUJBYECFT-UHFFFAOYSA-N 0.000 description 6
- 229910052753 mercury Inorganic materials 0.000 description 6
- 239000011800 void material Substances 0.000 description 6
- PEDCQBHIVMGVHV-UHFFFAOYSA-N Glycerine Chemical compound OCC(O)CO PEDCQBHIVMGVHV-UHFFFAOYSA-N 0.000 description 4
- 230000006835 compression Effects 0.000 description 4
- 238000007906 compression Methods 0.000 description 4
- 238000005336 cracking Methods 0.000 description 4
- 239000003054 catalyst Substances 0.000 description 3
- 230000002950 deficient Effects 0.000 description 3
- 238000004519 manufacturing process Methods 0.000 description 3
- XUIMIQQOPSSXEZ-UHFFFAOYSA-N Silicon Chemical compound [Si] XUIMIQQOPSSXEZ-UHFFFAOYSA-N 0.000 description 2
- 238000006243 chemical reaction Methods 0.000 description 2
- 230000000052 comparative effect Effects 0.000 description 2
- 230000007797 corrosion Effects 0.000 description 2
- 238000005260 corrosion Methods 0.000 description 2
- 235000011187 glycerol Nutrition 0.000 description 2
- 239000012535 impurity Substances 0.000 description 2
- 238000011160 research Methods 0.000 description 2
- 229910052710 silicon Inorganic materials 0.000 description 2
- 239000010703 silicon Substances 0.000 description 2
- -1 silit Chemical compound 0.000 description 2
- 244000271437 Bambusa arundinacea Species 0.000 description 1
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 description 1
- 239000004902 Softening Agent Substances 0.000 description 1
- 230000004913 activation Effects 0.000 description 1
- 229910052782 aluminium Inorganic materials 0.000 description 1
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 description 1
- 239000004411 aluminium Substances 0.000 description 1
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 description 1
- 230000015572 biosynthetic process Effects 0.000 description 1
- 229910052799 carbon Inorganic materials 0.000 description 1
- 239000000969 carrier Substances 0.000 description 1
- 150000001875 compounds Chemical class 0.000 description 1
- 238000000354 decomposition reaction Methods 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 239000003599 detergent Substances 0.000 description 1
- 238000011161 development Methods 0.000 description 1
- 230000018109 developmental process Effects 0.000 description 1
- KZHJGOXRZJKJNY-UHFFFAOYSA-N dioxosilane;oxo(oxoalumanyloxy)alumane Chemical compound O=[Si]=O.O=[Si]=O.O=[Al]O[Al]=O.O=[Al]O[Al]=O.O=[Al]O[Al]=O KZHJGOXRZJKJNY-UHFFFAOYSA-N 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000010304 firing Methods 0.000 description 1
- 239000007789 gas Substances 0.000 description 1
- 229910052863 mullite Inorganic materials 0.000 description 1
- 229910052760 oxygen Inorganic materials 0.000 description 1
- 239000001301 oxygen Substances 0.000 description 1
- 238000000059 patterning Methods 0.000 description 1
- 230000035699 permeability Effects 0.000 description 1
- 239000013265 porous functional material Substances 0.000 description 1
- 239000002994 raw material Substances 0.000 description 1
- 239000000376 reactant Substances 0.000 description 1
- 230000008929 regeneration Effects 0.000 description 1
- 238000011069 regeneration method Methods 0.000 description 1
- 230000000630 rising effect Effects 0.000 description 1
- 238000012216 screening Methods 0.000 description 1
- 239000000126 substance Substances 0.000 description 1
- 238000003786 synthesis reaction Methods 0.000 description 1
- 239000002023 wood Substances 0.000 description 1
- 229910052845 zircon Inorganic materials 0.000 description 1
- GFQYVLUOOAAOGM-UHFFFAOYSA-N zirconium(iv) silicate Chemical compound [Zr+4].[O-][Si]([O-])([O-])[O-] GFQYVLUOOAAOGM-UHFFFAOYSA-N 0.000 description 1
Landscapes
- Ceramic Products (AREA)
- Catalysts (AREA)
- Filtering Materials (AREA)
Abstract
The invention discloses a method for preparing silicon carbide honeycomb ceramics. The method comprises the following steps of: 1) mixing bamboo charcoal micro-powder, silica sol, aluminum oxide, yttrium oxide and organic matter starch at a weight ratio of 70: 20: (1-5): (1-5): (1-8), so as to obtain honeycomb ceramics powder; 2) mixing and pugging: mixing water, polyvinyl alcohol and polyhydroxy ethanol according to a weight ratio of 70: (10-20): (10-20), and uniformly stirring the components to obtain a solution; and mixing the solution with the honeycomb ceramics powder according to a weight ratio of 100: (65-80), fully mixing the mixture in a mixing machine at a normal pressure and temperature for 0.5-1 hour, and then aging the mixture at the normal pressure and temperature for 2-3 hours, so as to obtain slurry material; 3) carrying out extrusion molding; 4) drying; and 5) sintering. The silicon carbide honeycomb ceramics produced by the preparation method disclosed by the invention has the characteristics of controllable holes, high specific surface area, intensity meeting requirements, and the like.
Description
Technical field
The present invention relates to a kind of preparation method of silicon carbide honeycomb ceramics, specifically, is that bamboo charcoal micropowder and commercial silicon dioxide colloidal sol are the preparation method of the silicon carbide honeycomb ceramics of aggregate.
Background technology
Ceramic honey comb is a kind of porous functional materials; Healthy and free from worry (Corning) company of just rising by the U.S. as far back as the seventies in 20th century begins trial-production; Carry out the test of compact car tail gas clean-up the said firm in 1975 with regard to using ceramic honey comb, and obtained good effect.Ceramic honey comb has high specific surface area and good physical and chemical stability, also have in addition low density, high permeability, excellent energy absorptive character and high temperature resistant, corrosion-resistant, chemicalstability and dimensional stability high, be easy to many characteristics such as regeneration.
In recent years, along with the continuous development of ceramic honey comb technology of preparing, also in continuous expansion, application level improves constantly its range of application more really.Ceramic honey comb more and more receives people's attention as a kind of type material.Compare with traditional particulate state ceramic monolith; The vesicular honeycomb ceramic carrier have pressure fall little, geometric jacquard patterning unit surface is big, extended range is short, help the entering of reactant and the discharge of resultant; And the advantages such as volume that can dwindle reactor drum, it is also comparatively extensive to make ceramic honey comb use.
The material of preparation honeycomb ceramic carrier is except that present application comparatively widely the trichroite; Also have aluminium titanates, aluminum oxide, silit, zircon, triphane, mullite etc.; Though wherein its thermal expansivity of carbofrax material is higher relatively; But can satisfy performance demands to a certain extent, also have the intensity height simultaneously, series of advantages such as high temperature resistant, corrosion-resistant, wear-resistant, high-specific surface area, height ratio are strong.Because the preparation technology of silit is day by day ripe in recent years, its compound method is varied, and is cheap, is easy to make the research of silicon carbide honeycomb ceramics and use increasingly extensive.
Conventional silicon carbide honeycomb ceramics all adopts the mode of pore-creating to prepare, and the temperature of reaction height causes cost to rise, and is unfavorable for realizing production; Cause the purifying vehicle exhaust dynamics not enough thus; Atmospheric pollution can not effectively be controlled, and also has the contradiction between sintering character and the vesicular structure simultaneously, like the many still insufficient strength of material hole; Again high specific surface area can not be provided under the prerequisite that intensity guarantees, become its new research direction so select new raw material and technology to prepare silicon carbide honeycomb ceramics.
The preparation method of existing a kind of silicon carbide honeycomb ceramics adopts the sticker Walocel MT 20.000PV; Softening agent glycerine mixes with water 81%～75% by 12%～15%: 7%～10%; Mix with ceramic powder 70%～75% again, old, extrude behind the impurity screening and burning till more than 2200 ℃.Not only temperature of reaction is high, and hole is relatively low.
Summary of the invention
The technical problem that the present invention will solve provides a kind of preparation method of silicon carbide honeycomb ceramics, and it is controlled that the silicon carbide honeycomb ceramics produced of method has hole thus, and specific surface area is high, intensity characteristics such as meet the demands.
In order to solve the problems of the technologies described above, the present invention provides a kind of preparation method of silicon carbide honeycomb ceramics, may further comprise the steps:
1), the preparation of ceramic honey comb powder:
With bamboo charcoal micropowder and silicon dioxide gel is aggregate, is sintering aid with aluminum oxide and yttrium oxide, is pore-forming material with organism starch;
Bamboo charcoal micropowder, silicon dioxide gel, aluminum oxide, yttrium oxide and organism starch are mixed according to 70: 20: 1～5: 1～5: 1～8 weight ratio, get the ceramic honey comb powder;
2), mix pugging:
With water, Z 150PH with gather hydroxyl ethanol and mix according to 70: 10～20: 10～20 weight ratio, evenly stir, solution;
Solution is mixed according to 100: 65～80 weight ratio with the ceramic honey comb powder, in mixing roll, fully mixed 0.5～1 hour at normal temperatures and pressures then, then old at normal temperatures and pressures 2～3 hours; Get pug;
3), extrusion moulding:
Pug is extruded biscuit through extrusion equipment, and the size and dimension of this biscuit is controlled by the mould in the extrusion equipment;
4), drying:
Biscuit is adopted microwave heating (purpose is in order to discharge moisture) earlier, again in 0.5～1 hour (purpose is in order to get rid of aluminum oxide, yttrium oxide and organism starch) of 120～130 ℃ of heating;
5) burn till:
The product of gained after the step 4) drying was fired 1～4 hour in 1600 ℃～1800 ℃ under normal pressure, then 1000～1200 ℃ of insulations 1～2 hour.
Improvement as the preparation method of silicon carbide honeycomb ceramics of the present invention: bamboo charcoal micropowder is meant that particle diameter is that 10～100 microns, specific surface area are 200～300m
2The bamboo charcoal of/g.
Further improvement as the preparation method of silicon carbide honeycomb ceramics of the present invention: organism starch is plant amylum, for example is potato starch.
Further improvement as the preparation method of silicon carbide honeycomb ceramics of the present invention: step 3) is: earlier pug is carried out filtration, purification and handle that (purpose is that pug causes the product plug-hole when preventing extrusion moulding; Isolate and deformation defect), and then extrude biscuit through extrusion equipment.
Further improvement as the preparation method of silicon carbide honeycomb ceramics of the present invention: in the step 4): biscuit is adopted 450～490 watts of microwave heatings 12～15 minutes.
Further improvement as the preparation method of silicon carbide honeycomb ceramics of the present invention: in the step 5): sintering procedure is when being begun to rise to as cryogenic 500～600 ℃ by room temperature, heat-up rate is 20～30 ℃/h.Purpose is in order to prevent like the too fast blank cracking that is prone to cause that heats up.
The present invention be a kind of be the method that aggregate prepares silicon carbide honeycomb ceramics with bamboo charcoal and commercial silicon dioxide colloidal sol, the bamboo charcoal vesicular can produce hole with commercial silicon dioxide colloidal sol original position after synthetic.
To be bamboo wood fire under high temperature, few oxygen condition bamboo charcoal a kind ofly has a natural materials that enriches pore passage structure.Common bamboo charcoal specific surface area is 200～300m
2/ g, after secondary charing and activation treatment, the specific surface area of bamboo charcoal can be up to 700m
2/ g has high reactive behavior, and is suitable for silit synthetic carbon source.Silicon dioxide gel is optional uses industrial silicon dioxide gel, and commercial silicon dioxide colloidal sol is because uniform particles, and the few and higher specific surface area of impurity is more suitable for the silicon source as the silicon carbide honeycomb ceramics preparing carriers.Adopting bamboo charcoal micropowder and silicon sol to prepare silicon carbide honeycomb ceramics is an innovation, can significantly reduce the synthesis temperature of silicon carbide honeycomb ceramics carrier, and the organism pyrolytic decomposition can increase small hole, increasing specific surface area.
In the present invention:
The silicon dioxide gel that commercial silicon dioxide colloidal sol for example can be produced available from company of Tianjin Nuo Bang Science and Technology Ltd. is (like 6SiO
2.3H
2O, foreign matter content are 1%～5%; Meet GB);
The particle diameter of aluminum oxide and yttrium oxide is 20～200mm.
In institute of the present invention restricted portion value, through changing sintering temperature, sintering aid content and pore-forming material content may command specific surface area and intensity level.Generally speaking: increase sintering aid content and can reduce sintering temperature, thereby reduce production costs, help to realize industrialization; Increase pore-forming material content and can increase specific surface area, improve detergent power.
The present invention is that the contriver obtains through conscientiously studying, testing.Bamboo charcoal micropowder and commercial silicon dioxide colloidal sol are aggregate, and aluminum oxide and yttrium oxide are sintering aid, and organism starch is that the honeycomb ceramic carrier hole of pore-forming material preparation is controlled, and specific surface area is high, and intensity is good.Each item performance of this ceramic honey comb is following: the gained sample is pressed the mercury test, and the void content that records is 50%～75%, and the pore mean diameter is 10～15 microns, and volume density is 1.6～2.0g/cm
3There is small hole in electron microscopic observation in the product, increasing specific surface area greatly, and intensity meets the requirements, ultimate compression strength>=35MPa.
In sum, the present invention not only can improve temperature condition, thereby reduces sintering temperature; Thereby the micropore increasing specific surface area that produces when burning till in addition simultaneously again can the proof strength requirement.
Embodiment
In following examples:
Bamboo charcoal micropowder is meant that particle diameter is that 10～100 microns, specific surface area are 200～300m
2The bamboo charcoal of/g;
Silicon dioxide gel is selected commercial silicon dioxide colloidal sol for use;
The particle diameter of aluminum oxide and yttrium oxide is 20～200mm.
The preparation method of embodiment 1, a kind of silicon carbide honeycomb ceramics, carry out following steps successively:
1), the preparation of ceramic honey comb powder:
With bamboo charcoal micropowder and commercial silicon dioxide colloidal sol is aggregate, is sintering aid with aluminum oxide and yttrium oxide, is pore-forming material with the potato starch;
Bamboo charcoal micropowder, commercial silicon dioxide colloidal sol, aluminum oxide, yttrium oxide and potato starch were pressed 70: 20: 3: 3: 4 weight ratio is mixed; Get the ceramic honey comb powder;
2) mix pugging:
With water, Z 150PH with gather hydroxyl ethanol and mix according to 70: 15: 15 weight ratio, evenly stir, solution;
Solution is mixed according to 100: 75 weight ratio with the ceramic honey comb powder, in mixing roll, fully mixed 40 minutes at normal temperatures and pressures then, under the similarity condition (being under the normal temperature and pressure) old 2.5 hours; Get pug;
3), extrusion moulding:
Earlier pug is carried out filtration, purification and handle (pug is crossed 60 mesh sieves), thereby pug causes the product plug-hole when preventing extrusion moulding, isolate and defective such as distortion.
Pug after filtration, purification is handled is extruded biscuit through extrusion equipment, and the geomery size of biscuit is controlled (this is routine techniques) by the mould in the extrusion equipment.
4), drying:
Adopt earlier 450 watts of microwave heatings 12 minutes to discharge moisture biscuit, again in 120 ℃ of heating 0.5 hour to get rid of aluminum oxide, yttrium oxide and potato starch etc.;
5) burn till:
The product of gained after the step 4) drying was fired 2 hours in 1750 ℃ under normal pressure, then 1000 ℃ of insulations 1 hour, silicon carbide honeycomb ceramics.
Sintering procedure is when being begun to rise to as cryogenic 500～600 ℃ by room temperature, heat-up rate is 20 ℃/h, as the too fast blank cracking that is prone to cause that heats up.
The silicon carbide honeycomb ceramics of gained can be used support of the catalyst as automobile exhaust purifier, and its each item performance index are following:
The gained sample is pressed the mercury test, and the void content that records is 60%, and the pore mean diameter is 12 microns, and volume density is 1.8g/cm
3, there is small hole in electron microscopic observation in the product, increasing specific surface area greatly, ultimate compression strength>=35MPa.
The preparation method of embodiment 2, a kind of silicon carbide honeycomb ceramics, carry out following steps successively:
1), the preparation of ceramic honey comb powder:
With bamboo charcoal micropowder and commercial silicon dioxide colloidal sol is aggregate, is sintering aid with aluminum oxide and yttrium oxide, is pore-forming material with the potato starch;
Bamboo charcoal micropowder, commercial silicon dioxide colloidal sol, aluminum oxide, yttrium oxide and potato starch were pressed 70: 20: 2: 2: 6 weight ratio is mixed; Get the ceramic honey comb powder;
2) mix pugging:
With water, Z 150PH with gather hydroxyl ethanol and mix according to 70: 10: 20 weight ratio, evenly stir, solution;
Solution is mixed according to 100: 70 weight ratio with the ceramic honey comb powder, in mixing roll, fully mixed 0.5 hour at normal temperatures and pressures then, under the similarity condition (being under the normal temperature and pressure) old 2 hours; Get pug;
3), extrusion moulding:
Earlier pug is carried out filtration, purification and handle (pug is crossed 60 mesh sieves), thereby pug causes the product plug-hole when preventing extrusion moulding, isolate and defective such as distortion.
Pug after filtration, purification is handled is extruded biscuit through extrusion equipment, and the geomery size of biscuit is controlled (this is routine techniques) by the mould in the extrusion equipment.
4), drying:
Adopt earlier 460 watts of microwave heatings 12 minutes to discharge moisture biscuit, again in 125 ℃ of heating 40 minutes to get rid of aluminum oxide, yttrium oxide and potato starch etc.;
5) burn till:
The product of gained after the step 4) drying was fired 1.5 hours in 1800 ℃ under normal pressure, then 1100 ℃ of insulations 1 hour, silicon carbide honeycomb ceramics.
Sintering procedure is when being begun to rise to as cryogenic 500～600 ℃ by room temperature, heat-up rate is 25 ℃/h, as the too fast blank cracking that is prone to cause that heats up.
The silicon carbide honeycomb ceramics of gained can be used support of the catalyst as automobile exhaust purifier, and its each item performance index are following:
The gained sample is pressed the mercury test, and the void content that records is 75%, and the pore mean diameter is 13 microns, and volume density is 1.65g/cm
3, there is small hole in electron microscopic observation in the product, increasing specific surface area greatly, ultimate compression strength>=35MPa.
The preparation method of embodiment 3, a kind of silicon carbide honeycomb ceramics, carry out following steps successively:
1), the preparation of ceramic honey comb powder:
With bamboo charcoal micropowder and commercial silicon dioxide colloidal sol is aggregate, is sintering aid with aluminum oxide and yttrium oxide, is pore-forming material with the potato starch;
Bamboo charcoal micropowder, commercial silicon dioxide colloidal sol, aluminum oxide, yttrium oxide and potato starch were pressed 70: 20: 4: 4: 2 weight ratio is mixed; Get the ceramic honey comb powder;
2) mix pugging:
With water, Z 150PH with gather hydroxyl ethanol and mix according to 70: 14: 16 weight ratio, evenly stir, solution;
Solution is mixed according to 100: 78 weight ratio with the ceramic honey comb powder, in mixing roll, fully mixed 45 minutes at normal temperatures and pressures then, under the similarity condition (being under the normal temperature and pressure) old 3 hours; Get pug;
3), extrusion moulding:
Earlier pug is carried out filtration, purification and handle (pug is crossed 60 mesh sieves), thereby pug causes the product plug-hole when preventing extrusion moulding, isolate and defective such as distortion.
Pug after filtration, purification is handled is extruded biscuit through extrusion equipment, and the geomery size of biscuit is controlled (this is routine techniques) by the mould in the extrusion equipment.
4), drying:
Adopt earlier 460 watts of microwave heatings 12 minutes to discharge moisture biscuit, again in 125 ℃ of heating 40 minutes to get rid of aluminum oxide, yttrium oxide and potato starch etc.;
5) burn till:
The product of gained after the step 4) drying was fired 2 hours in 1600 ℃ under normal pressure, then 1000 ℃ of insulations 2 hours, silicon carbide honeycomb ceramics.
Sintering procedure is when being begun to rise to as cryogenic 500～600 ℃ by room temperature, heat-up rate is 25 ℃/h, as the too fast blank cracking that is prone to cause that heats up.
The silicon carbide honeycomb ceramics of gained can be used support of the catalyst as automobile exhaust purifier, and its each item performance index are following:
The gained sample is pressed the mercury test, and the void content that records is 55%, and the pore mean diameter is 13 microns, and volume density is 1.9g/cm
3, there is small hole in electron microscopic observation in the product, increasing specific surface area greatly, ultimate compression strength>=35MPa.
Comparative Examples 1,
With embodiment 1 step 2) in solution make into: water, Walocel MT 20.000PV and glycerine mix according to 70: 15: 15 weight ratio, evenly stir, solution; All the other are with embodiment 1.
Silicon carbide honeycomb ceramics each item performance index of gained are following:
The gained sample is pressed the mercury test, and the void content that records is 45%, and the pore mean diameter is 10 microns, and volume density is 2.3g/cm
3
Comparative Examples 2,
Replace the ceramic honey comb powder in the step 1) of embodiment 1 with the ceramic powder of routine, make the firing temperature of step 5) into 2200 ℃, all the other are with embodiment 1.
Silicon carbide honeycomb ceramics each item performance index of gained are following:
The gained sample is pressed the mercury test, and the void content that records is 40%, and the pore mean diameter is 8 microns, and volume density is 2.4g/cm
3
At last, it is also to be noted that what more than enumerate only is several specific embodiments of the present invention.Obviously, the invention is not restricted to above embodiment, many distortion can also be arranged.All distortion that those of ordinary skill in the art can directly derive or associate from content disclosed by the invention all should be thought protection scope of the present invention.
Claims (7)
1. the preparation method of silicon carbide honeycomb ceramics is characterized in that may further comprise the steps:
1), the preparation of ceramic honey comb powder:
With bamboo charcoal micropowder and silicon dioxide gel is aggregate, is sintering aid with aluminum oxide and yttrium oxide, is pore-forming material with organism starch;
Bamboo charcoal micropowder, silicon dioxide gel, aluminum oxide, yttrium oxide and organism starch are mixed according to 70: 20: 1～5: 1～5: 1～8 weight ratio, get the ceramic honey comb powder;
2), mix pugging:
With water, Z 150PH with gather hydroxyl ethanol and mix according to 70: 10～20: 10～20 weight ratio, evenly stir, solution;
Said solution is mixed according to 100: 65～80 weight ratio with the ceramic honey comb powder, in mixing roll, fully mixed 0.5～1 hour at normal temperatures and pressures then, then old at normal temperatures and pressures 2～3 hours; Get pug;
3), extrusion moulding:
Pug is extruded biscuit through extrusion equipment, and the size and dimension of said biscuit is controlled by the mould in the extrusion equipment;
4), drying:
Biscuit is adopted microwave heating earlier, again in 120～130 ℃ of heating 0.5～1 hour;
5), burn till:
The product of gained after the step 4) drying was fired 1～4 hour in 1600 ℃～1800 ℃ under normal pressure, then 1000～1200 ℃ of insulations 1～2 hour.
2. the preparation method of silicon carbide honeycomb ceramics according to claim 1 is characterized in that: said bamboo charcoal micropowder is meant that particle diameter is that 10～100 microns, specific surface area are 200～300m
2The bamboo charcoal of/g.
3. the preparation method of silicon carbide honeycomb ceramics according to claim 2, it is characterized in that: said organism starch is plant amylum.
4. the preparation method of silicon carbide honeycomb ceramics according to claim 3, it is characterized in that: said plant amylum is a potato starch.
5. according to the preparation method of the arbitrary described silicon carbide honeycomb ceramics of claim 1～4, it is characterized in that: said step 3) is: earlier pug is carried out filtration, purification and handle, and then extrude biscuit through extrusion equipment.
6. the preparation method of silicon carbide honeycomb ceramics according to claim 5 is characterized in that: in the said step 4): biscuit is adopted 450～490 watts of microwave heatings 12～15 minutes.
7. the preparation method of silicon carbide honeycomb ceramics according to claim 6, it is characterized in that: in the said step 5): sintering procedure is when being begun to rise to as cryogenic 500～600 ℃ by room temperature, heat-up rate is 20～30 ℃/h.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201110327201 CN102503533B (en) | 2011-10-25 | 2011-10-25 | Method for preparing silicon carbide honeycomb ceramics |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201110327201 CN102503533B (en) | 2011-10-25 | 2011-10-25 | Method for preparing silicon carbide honeycomb ceramics |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN102503533A true CN102503533A (en) | 2012-06-20 |
| CN102503533B CN102503533B (en) | 2013-06-05 |
Family
ID=46215684
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 201110327201 Expired - Fee Related CN102503533B (en) | 2011-10-25 | 2011-10-25 | Method for preparing silicon carbide honeycomb ceramics |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN102503533B (en) |
Cited By (11)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102850593A (en) * | 2012-09-18 | 2013-01-02 | 蚌埠鑫源石英材料有限公司 | Preparation method of black silicon dioxide powder material |
| CN104072141A (en) * | 2013-03-29 | 2014-10-01 | 北京市理化分析测试中心 | Preparation method of silicon carbide honeycomb ceramics |
| CN105272351A (en) * | 2015-10-26 | 2016-01-27 | 青岛铸英特陶科技有限公司 | Preparation method of rare earth ceramic foam filter |
| CN107188183A (en) * | 2017-06-23 | 2017-09-22 | 郑州西利康新材料有限公司 | A kind of preparation method of silicon carbide micro-powder |
| CN107573077A (en) * | 2017-10-18 | 2018-01-12 | 重庆奥福精细陶瓷有限公司 | Recrystallized silicon carbide diesel vehicle soot grain catcher and preparation method thereof |
| CN107698276A (en) * | 2017-09-19 | 2018-02-16 | 常州朋悦纺织品有限公司 | A kind of porous silicon carbide ceramic and preparation method thereof |
| CN108610050A (en) * | 2018-04-16 | 2018-10-02 | 长兴科创科技咨询有限公司 | A kind of porous silicon carbide ceramic and preparation method thereof |
| CN110022622A (en) * | 2019-05-16 | 2019-07-16 | 厦门蜂涛陶瓷有限公司 | A kind of cellular alumina ceramic heating element and preparation method thereof |
| CN115364580A (en) * | 2021-05-20 | 2022-11-22 | 中国石油化工股份有限公司 | Honeycomb carbon-based filter material and preparation method thereof |
| CN115636414A (en) * | 2022-10-31 | 2023-01-24 | 常州永蓁材料科技有限公司 | Silicon carbide composite particles with high specific surface area, and preparation method and application thereof |
| CN116120069A (en) * | 2022-12-28 | 2023-05-16 | 大莲电瓷（福建）有限公司 | Silicon carbide honeycomb ceramic and preparation method thereof |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101269992A (en) * | 2008-04-25 | 2008-09-24 | 北京化工大学 | Surface ceramic porous bamboo charcoal absorbing material loaded with magnetic metal and preparation method thereof |
| CN101386538A (en) * | 2008-10-28 | 2009-03-18 | 中国林业科学研究院木材工业研究所 | A kind of preparation method of silicon carbide ceramics |
| CN101514105A (en) * | 2009-04-02 | 2009-08-26 | 浙江大学 | Method for preparing silicon carbide micropowder |
| CN101795996A (en) * | 2007-08-08 | 2010-08-04 | 法国英格瓷陶瓷公司 | Porous ceramic bodies and process for their preparation |
-
2011
- 2011-10-25 CN CN 201110327201 patent/CN102503533B/en not_active Expired - Fee Related
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101795996A (en) * | 2007-08-08 | 2010-08-04 | 法国英格瓷陶瓷公司 | Porous ceramic bodies and process for their preparation |
| CN101269992A (en) * | 2008-04-25 | 2008-09-24 | 北京化工大学 | Surface ceramic porous bamboo charcoal absorbing material loaded with magnetic metal and preparation method thereof |
| CN101386538A (en) * | 2008-10-28 | 2009-03-18 | 中国林业科学研究院木材工业研究所 | A kind of preparation method of silicon carbide ceramics |
| CN101514105A (en) * | 2009-04-02 | 2009-08-26 | 浙江大学 | Method for preparing silicon carbide micropowder |
Cited By (14)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102850593A (en) * | 2012-09-18 | 2013-01-02 | 蚌埠鑫源石英材料有限公司 | Preparation method of black silicon dioxide powder material |
| CN104072141A (en) * | 2013-03-29 | 2014-10-01 | 北京市理化分析测试中心 | Preparation method of silicon carbide honeycomb ceramics |
| CN105272351A (en) * | 2015-10-26 | 2016-01-27 | 青岛铸英特陶科技有限公司 | Preparation method of rare earth ceramic foam filter |
| CN107188183B (en) * | 2017-06-23 | 2019-04-12 | 郑州西利康新材料有限公司 | A kind of preparation method of silicon carbide micro-powder |
| CN107188183A (en) * | 2017-06-23 | 2017-09-22 | 郑州西利康新材料有限公司 | A kind of preparation method of silicon carbide micro-powder |
| CN107698276A (en) * | 2017-09-19 | 2018-02-16 | 常州朋悦纺织品有限公司 | A kind of porous silicon carbide ceramic and preparation method thereof |
| CN107573077A (en) * | 2017-10-18 | 2018-01-12 | 重庆奥福精细陶瓷有限公司 | Recrystallized silicon carbide diesel vehicle soot grain catcher and preparation method thereof |
| CN108610050A (en) * | 2018-04-16 | 2018-10-02 | 长兴科创科技咨询有限公司 | A kind of porous silicon carbide ceramic and preparation method thereof |
| CN110022622A (en) * | 2019-05-16 | 2019-07-16 | 厦门蜂涛陶瓷有限公司 | A kind of cellular alumina ceramic heating element and preparation method thereof |
| CN115364580A (en) * | 2021-05-20 | 2022-11-22 | 中国石油化工股份有限公司 | Honeycomb carbon-based filter material and preparation method thereof |
| CN115364580B (en) * | 2021-05-20 | 2023-10-10 | 中国石油化工股份有限公司 | Honeycomb carbon-based filter material and preparation method thereof |
| CN115636414A (en) * | 2022-10-31 | 2023-01-24 | 常州永蓁材料科技有限公司 | Silicon carbide composite particles with high specific surface area, and preparation method and application thereof |
| CN116120069A (en) * | 2022-12-28 | 2023-05-16 | 大莲电瓷（福建）有限公司 | Silicon carbide honeycomb ceramic and preparation method thereof |
| CN116120069B (en) * | 2022-12-28 | 2024-04-26 | 大莲电瓷（福建）有限公司 | Silicon carbide honeycomb ceramic and preparation method thereof |
Also Published As
| Publication number | Publication date |
|---|---|
| CN102503533B (en) | 2013-06-05 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN102503533B (en) | Method for preparing silicon carbide honeycomb ceramics | |
| US7976768B2 (en) | Aluminum titanate ceramic forming batch mixtures and green bodies including pore former combinations and methods of manufacturing and firing same | |
| KR100607481B1 (en) | Porous material and its manufacturing method | |
| CN101503191B (en) | A method for preparing honeycomb activated carbon from coal and coal tar | |
| JP5502728B2 (en) | Aluminum titanate ceramic forming batch mixture with pore former and green body | |
| CN102807384B (en) | Preparation method of high-porosity silicon-carbide porous ceramics | |
| CN1156412C (en) | Honeycomb ceramic as one kind of high-performance composite material | |
| CN107082628B (en) | Preparation method of porous ceramic support based on molecular sieve membrane synthesis residual liquid | |
| CN101781124A (en) | Method for preparing porzite porous honeycomb ceramic with needle-shaped crystal structure | |
| EP2105424B1 (en) | Method for manufacturing a honeycomb structured body | |
| CN101857458B (en) | Preparation method of Ce-Fe-Zr combined metal oxide honeycomb ceramics type integral oxygen carrier | |
| CN102746022A (en) | Preparation method of Al2O3 ceramic material with controllable bimodal porous structure | |
| CN108484149B (en) | A kind of preparation method of NaA molecular sieve membrane support | |
| CN103641507B (en) | Zeolite-attapulgite composite honeycomb body and preparation method thereof | |
| CN103011893A (en) | Diatomite substrate-shaped ceramic membrane, and preparation method and application thereof | |
| CN112430123A (en) | Narrow-pore-diameter-distribution large-size cordierite gasoline particle filter and preparation method thereof | |
| CN114988903A (en) | High-strength low-shrinkage porous ceramic and preparation method thereof | |
| CN104072148B (en) | A kind of preparation method of low cost silicon nitride honeycomb pottery | |
| CN104072147B (en) | A kind of preparation method of silicon nitride honeycomb pottery | |
| CN103253935A (en) | Automobile exhaust Al2TiO5/SiC porous composite material and its preparation method | |
| CN102503521A (en) | Preparation method of high-strength silicon carbide porous ceramic | |
| CN114605168A (en) | Preparation method of air filter material based on pansy porous ceramic and zeolite | |
| CN100352788C (en) | Method for producing iolite-based and mullite-based tubular ceramic separation membrane | |
| CN109928759A (en) | A kind of SiC ceramic membrane electrochemical reaction electrode and preparation method thereof | |
| CN102584315B (en) | Synthetic method of catalyst carrier for automobile tail gas purifier |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20130605 |
|
| CF01 | Termination of patent right due to non-payment of annual fee |