CN104876624A - Silicon carbide honeycomb ceramic pug and pugging method - Google Patents
Silicon carbide honeycomb ceramic pug and pugging method Download PDFInfo
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- CN104876624A CN104876624A CN201510263886.3A CN201510263886A CN104876624A CN 104876624 A CN104876624 A CN 104876624A CN 201510263886 A CN201510263886 A CN 201510263886A CN 104876624 A CN104876624 A CN 104876624A
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- silicon carbide
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Abstract
The invention relates to a silicon carbide ceramic material, in particular to a silicon carbide honeycomb ceramic pug and a pugging method. Silicon carbide with different grain diameters is adopted as a main material, and then a binder, a pore-forming agent, a lubricating agent, a high polymer release agent, water and a plasticizer are added, after the pugging steps like mixing materials and twice ageing, the pug with high plasticity and high viscidity and used for producing silicon carbide honeycomb ceramics is obtained. According to the silicon carbide honeycomb ceramic pug and the pugging method, provided by the technical scheme of the invention, various technical indices of the produced honeycomb ceramic products are obviously improved when compared with that of the prior art.
Description
Art
The present invention relates to thyrite, particularly a kind of silicon carbide honeycomb ceramics pug and mud refining method.
Background technology
Silicon carbide honeycomb ceramics is a kind of structure of developing in recent years new ceramics product like honeycomb shape.Be widely used in the industry such as chemical industry, electric power, metallurgy, oil, electronic apparatus, machinery by being used in kart tail gas clean-up the earliest to today, and more and more extensively ceramic honeycomb not only has excellent ambient temperature mechanical properties, as high bending strength, excellent oxidation-resistance, good erosion resistance, high resistance to wearing and low frictional coefficient, and mechanical behavior under high temperature (intensity, creep resistance etc.) is best in known ceramic material.Number of patent application 200610106781.8, title " wall-flow type honeycomb ceramic carrier batching and sludge mixing method ", the batching in this patent adopts single pure silicon carbide powder, and add the flour aqueous solution and fully stir, sealed storage is preserved.Shortcoming: the 1. pure silicon carbide powder granularity peak value as ceramic honey comb duct skeleton in batching is single, is unfavorable for the formation of diversification aperture passage, cannot obtains the honeycomb ceramic carrier of high capture rate.2. alr mode easily forms airborne dust, the powder that the easy quality of adsorption of stirrer drum is lighter, stirs powder and mixes uneven.3. flour mixing solutions easily forms agglomeration, and easily precipitates.4. old preservation process moulded pottery not yet put in a kiln to bake surface-moisture is volatile, and the hard material particle of formation easily blocks extrusion die, causes partial cell pottery conduit wall to pull or lack.
Summary of the invention
The object of the invention is the defect solving prior art existence, provide a kind of using the silicon carbide powder of different-grain diameter as duct skeleton, some additives are auxiliary material, are mixed into a kind of silicon carbide honeycomb ceramics pug and the mud refining method of high-ductility and high viscosity.
Technical scheme of the present invention is: a kind of silicon carbide honeycomb ceramics pug, it is characterized in that silicon carbide honeycomb ceramics pug is the silicon carbide powder that take weight percent as the particle diameter of 5-20% is 0.5-1.5 μm, to be the silicon carbide powder of 6-20 μm and the particle diameter of 4-10% be the particle diameter of 70-90% that the silicon carbide of 15-40 μm is major ingredient, the weight percent of auxiliary material take major ingredient as counterweight radix, wherein: binding agent is the 4-11% of silicon carbide major ingredient weight, pore-forming material is the 6-10% of silicon carbide major ingredient weight, lubricant is the 4-20% of silicon carbide major ingredient weight, superpolymer releasing agent is the 0.5-5% of silicon carbide major ingredient weight, water is the 15-30% of silicon carbide major ingredient weight, softening agent is the 1-5% of silicon carbide major ingredient weight.
Above-mentioned binding agent is that one or more the arbitrary proportion in the Vltra tears of purity more than 98%, methylcellulose gum, polyvinyl alcohol is composite;
Pore-forming material be purity more than 98%, one or more the arbitrary proportion of granularity in the graphite of 15-30 micron, carbon dust, coal dust be composite;
Lubricant is that one or more the arbitrary proportion in the ethanol of purity more than 99%, tung oil, machine oil is composite;
Softening agent is that one or more the arbitrary proportion in the glycerine of purity more than 98.5%, polyvalent alcohol, ethyl-methyl ammonium sulfate is composite.
Hydromining pure water.
A mud refining method for silicon carbide honeycomb ceramics pug, its mud refining step is:
1) batch mixing: add in stirrer by the silicon carbide major ingredient of three kinds of different-grain diameters, stirs 5-75 minute;
2) after silicon carbide major ingredient fully mixes, add binding agent, pore-forming material, stir after 10-30 minute, add lubricant, releasing agent stirs 30-60 minute, then add water and softening agent, stir after 30-60 minute, pug is packed, vacuumizes sealing, places and carry out old in 3-5 days;
3) mediate mud refining: by above-mentioned old after pug put into kneader and carry out kneadings mud refining, after 1-2 hour mud refining time, by pug pack, vacuumize sealing, the old 3-5 days of secondary;
4) extrusion molding: the pug after secondary is old is put into extrusion machine and carried out extrusion molding.
In above-mentioned kneading mud refining process, every the turning direction of 5-10 minute adjustment kneader.
Twice in above-mentioned processing step old process is placed on by pug on lighttight indoor shelf, and keep room temp at about 10-25 DEG C, atmospheric moisture leaves standstill under 40%-70% condition.
The advantage of technical solution of the present invention is:
(1) use the silicon carbide powder of different-grain diameter as duct skeleton, be conducive to the formation of diversification aperture passage;
(2) adopt graphite, carbon dust, coal dust as pore-forming material, more contribute to sintering and form micropore.
(3) pug mediates mud refining after twice old, makes pug have more cohesiveness and plasticity, increases the density of pug, improves channel quality and the number of extruding honeycomb moulded pottery not yet put in a kiln to bake.
The present invention is using the silicon carbide powder of different-grain diameter as duct skeleton, and some additives are auxiliary material, is mixed into the pug of high-ductility and high viscosity, and through extruding, sintering, the properties of ceramic honey comb has increased significantly.Such as the numerical value of apparent porosity prior art is at 15-35%, the product utilizing the technical program to obtain is 27-43%, the numerical value of water-intake rate prior art is at 12-16%, the product utilizing the technical program to obtain is 16-19%, the numerical value of voidage prior art is at 42-55%, the product utilizing the technical program to obtain is 50-60%, ultimate compression strength A is to the numerical value >=12Mpa of prior art, the product numerical value utilizing the technical program to obtain is >=15Mpa, ultimate compression strength B is to the numerical value >=3Mpa of prior art, the product numerical value utilizing the technical program to obtain is >=5Mpa, hot shock resistance detects and is warming up to 650 DEG C with 6 DEG C/min, be incubated after 30 minutes, taking-up naturally cools to greenhouse in atmosphere, circulation totally 3 times, assay 3 equal flawlesses and breakage.
In sum, all technical of the silicon carbide honeycomb ceramics product utilizing technical scheme provided by the invention to produce compared with prior art is significantly improved.
Embodiment
For silicon carbide major ingredient 100 grams, be described as follows.
Embodiment 1:
Take granularity respectively at 70 grams, the silicon carbide of 6-20 μm, granularity is at 10 grams, the silicon carbide of 15-40 μm, and granularity is at 20 grams, the silicon carbide of 0.5-1.5 μm.With above-mentioned former powder for counterweight radix, take Vltra tears 4 grams, carbon dust 6 grams, tung oil 20 grams, superpolymer releasing agent 5 grams, 30 grams, water, glycerine 5 grams are for subsequent use, glycerine is mixed with water, stir and become aqueous glycerin solution.
Mud refining step is as follows:
1) batch mixing: add in stirrer by the silicon carbide major ingredient of the above-mentioned three kinds of different-grain diameter scopes weighed up, stirs 5 minutes, makes it mix;
2) after silicon carbide major ingredient fully mixes, add after above-mentioned Vltra tears, the carbon dust taken stir 30 minutes, add tung oil, releasing agent stirs 40 minutes, then add after aqueous glycerin solution stirs 60 minutes, pug is taken out, packs, vacuumizes sealing, be placed on lighttight indoor shelf, keep room temp at about 10 DEG C, atmospheric moisture leaves standstill under about 40% condition carries out old in 3 days;
3) mediate mud refining: the pug after above-mentioned old 3 days is put into kneader and carries out kneadings mud refining, pug, after 1 hour, takes out, packs, vacuumizes sealing by mud refining, old 5 days of secondary, old condition is with old condition is identical for the first time;
4) extrusion molding: the pug after secondary is old is put into extrusion machine and carried out extrusion molding.
Embodiment 2-4:
On the basis of embodiment 1, change the proportion relation of major ingredient and auxiliary material as following table, all the other conditions are constant.
The proportioning list position of major ingredient: gram
| Embodiment | The silicon carbide of 6-20 μm | The silicon carbide of 15-40 μm | The silicon carbide of 0.5-1.5 μm |
| Embodiment 2 | 90 | 4 | 6 |
| Embodiment 3 | 86 | 8 | 16 |
| Embodiment 4 | 78 | 9 | 13 |
Ratio of adjuvant list position: gram
| Embodiment | Vltra tears | Carbon dust | Tung oil | Polyoxyethylene glycol | Water | Glycerine |
| Embodiment 2 | 11 | 10 | 4 | 0.5 | 15 | 1 |
| Embodiment 3 | 8 | 8 | 10 | 3 | 20 | 4 |
| Embodiment 4 | 6 | 9 | 15 | 2 | 18 | 3 |
Twice old process in above-mentioned mud refining step is placed on by pug on lighttight indoor shelf, and keep room temp at about 25 DEG C, atmospheric moisture leaves standstill 3 days under about 70% condition.
Embodiment 5-6:
On the basis of embodiment 2, change ratio of adjuvant relation as following table, all the other conditions are constant.
Ratio of adjuvant list position: gram
| Embodiment | Binding agent | Pore-forming material | Lubricant | Silicone oil | Water | Softening agent |
| Embodiment 5 | Methylcellulose gum: 11 | Graphite: 10 | Ethanol: 4 | 0.5 | 15 | Polyvalent alcohol: 1 |
| Embodiment 6 | Polyvinyl alcohol: 7 | Coal dust: 7 | Machine oil: 8 | 4 | 26 | Ethyl-methyl ammonium sulfate: 4 |
Twice old process in above-mentioned mud refining step is placed on by pug on lighttight indoor shelf, and keep room temp at about 20 DEG C, atmospheric moisture leaves standstill 4 days under about 60% condition.
Embodiment 7:
On the basis of embodiment 1, the proportion relation of auxiliary material is: methylcellulose gum 5 grams, polyvinyl alcohol 5 grams, 5 grams, graphite, coal dust 5 grams, ethanol 5 grams, 5 grams, machine oil, low molecular weight polyethylene 5 grams, 20 grams, water, polyvalent alcohol 2 grams, 2 grams, ethyl-methyl ammonium sulfate, all the other conditions are constant.
Embodiment 8:
On the basis of embodiment 1, the proportion relation of auxiliary material is: Vltra tears 3, methylcellulose gum 2.5 grams, polyvinyl alcohol 3 grams, carbon dust 3,4 grams, graphite, coal dust 2 grams, tung oil 7, ethanol 5 grams, 5 grams, machine oil, polyoxyethylene glycol 3 grams, 20 grams, water, glycerine 1, polyvalent alcohol 2 grams, 2 grams, ethyl-methyl ammonium sulfate, all the other conditions are constant.
Embodiment 9:
On the basis of above-described embodiment 1, change mud refining step as follows:
1) batch mixing: add in stirrer by the silicon carbide major ingredient of the above-mentioned three kinds of different-grain diameter scopes weighed up, stirs 75 minutes, makes it mix;
2) after silicon carbide major ingredient fully mixes, add after above-mentioned Vltra tears, the carbon dust taken stir 10 minutes, add tung oil, releasing agent stirs 60 minutes, then add after aqueous glycerin solution stirs 30 minutes, pug is taken out, packs, vacuumizes sealing, places and carry out old in 5 days;
3) mud refining is mediated: the pug after above-mentioned old 5 days is put into kneader and carries out kneading mud refining, pug, after 2 hours, takes out, packs, vacuumizes sealing by mud refining, old 3 days of secondary;
4) extrusion molding: the pug after secondary is old is put into extrusion machine and carried out extrusion molding.
In above-mentioned kneading mud refining step, every the turning direction of adjustment in a 10 minutes kneader, kneading mud refining process is made to be in rotating circulation rotating.
Embodiment 10:
On the basis of embodiment 3, change the stirring in mud refining step and old time, specific as follows:
1) batch mixing: add in stirrer by the silicon carbide major ingredient of the above-mentioned three kinds of different-grain diameter scopes weighed up, stirs 40 minutes, makes it mix;
2) after silicon carbide major ingredient fully mixes, add after above-mentioned Vltra tears, the carbon dust taken stir 20 minutes, add tung oil, releasing agent stirs 30 minutes, then add after aqueous glycerin solution stirs 40 minutes, pug is taken out, packs, vacuumizes sealing, places and carry out old in 4 days;
3) mud refining is mediated: the pug after above-mentioned old 4 days is put into kneader and carries out kneading mud refining, pug, after 1.5 hours, takes out, packs, vacuumizes sealing by mud refining, old 4 days of secondary;
4) extrusion molding: the pug after secondary is old is put into extrusion machine and carried out extrusion molding.
In above-mentioned kneading mud refining step, every the turning direction of adjustment in a 7 minutes kneader, kneading mud refining process is made to be in rotating circulation rotating.
Embodiment 11:
On the basis of embodiment 7 or 8, change the stirring in mud refining step and old time, specific as follows:
1) batch mixing: add in stirrer by the silicon carbide major ingredient of the above-mentioned three kinds of different-grain diameter scopes weighed up, stirs 50 minutes, makes it mix;
2) after silicon carbide major ingredient fully mixes, add after above-mentioned Vltra tears, the carbon dust taken stir 20 minutes, add tung oil, releasing agent stirs 50 minutes, then add after aqueous glycerin solution stirs 45 minutes, pug is taken out, packs, vacuumizes sealing, places and carry out old in 3.5 days;
3) mud refining is mediated: the pug after above-mentioned old 3.5 days is put into kneader and carries out kneading mud refining, pug, after 1.8 hours, takes out, packs, vacuumizes sealing by mud refining, old 3.5 days of secondary;
4) extrusion molding: the pug after secondary is old is put into extrusion machine and carried out extrusion molding.
In above-mentioned kneading mud refining step, every the turning direction of adjustment in a 8 minutes kneader, kneading mud refining process is made to be in rotating circulation rotating.
In the above-described embodiments, as Vltra tears, methylcellulose gum, the polyvinyl alcohol of binding agent, it is that purity is more than 98%;
As graphite, carbon dust, the coal dust of pore-forming material, its purity more than 98%, granularity is 15-30 micron;
As ethanol, tung oil, the machine oil of lubricant, its purity is more than 99%;
As glycerine, polyvalent alcohol, the ethyl-methyl ammonium sulfate of softening agent, its purity is more than 98.5%;
Superpolymer releasing agent adopts the conventional products of existing market sale;
The pure water that hydromining is conventional.
Claims (5)
1. a silicon carbide honeycomb ceramics pug, it is characterized in that silicon carbide honeycomb ceramics pug is the silicon carbide powder that take weight percent as the particle diameter of 5-20% is 0.5-1.5 μm, to be the silicon carbide powder of 6-20 μm and the particle diameter of 4-10% be the particle diameter of 70-90% that the silicon carbide of 15-40 μm is major ingredient, the weight percent of auxiliary material take major ingredient as counterweight radix, wherein: binding agent is the 4-11% of silicon carbide major ingredient weight, pore-forming material is the 6-10% of silicon carbide major ingredient weight, lubricant is the 4-20% of silicon carbide major ingredient weight, superpolymer releasing agent is the 0.5-5% of silicon carbide major ingredient weight, water is the 15-30% of silicon carbide major ingredient weight, softening agent is the 1-5% of silicon carbide major ingredient weight.
2. a kind of silicon carbide honeycomb ceramics pug according to claim 1, is characterized in that above-mentioned binding agent is that one or more arbitrary proportion in the Vltra tears of purity more than 98%, methylcellulose gum, polyvinyl alcohol is composite;
Pore-forming material be purity more than 98%, one or more the arbitrary proportion of granularity in the graphite of 15-30 micron, carbon dust, coal dust be composite;
Lubricant is that one or more the arbitrary proportion in the ethanol of purity more than 99%, tung oil, machine oil is composite;
Softening agent is that one or more the arbitrary proportion in the glycerine of purity more than 98.5%, polyvalent alcohol, ethyl-methyl ammonium sulfate is composite;
Hydromining pure water.
3. a mud refining method for silicon carbide honeycomb ceramics pug, its mud refining step is:
1) batch mixing: add in stirrer by the silicon carbide major ingredient of three kinds of different-grain diameters, stirs 5-75 minute;
2) after silicon carbide major ingredient fully mixes, add binding agent, pore-forming material, stir after 10-30 minute, add lubricant, releasing agent stirs 30-60 minute, then add water and softening agent, stir after 30-60 minute, pug is packed, vacuumizes sealing, places and carry out old in 3-5 days;
3) mediate mud refining: by above-mentioned old after pug put into kneader and carry out kneadings mud refining, after 1-2 hour mud refining time, by pug pack, vacuumize sealing, the old 3-5 days of secondary;
4) extrusion molding: the pug after secondary is old is put into extrusion machine and carried out extrusion molding.
4. the mud refining method of a kind of silicon carbide honeycomb ceramics pug according to claim 3, is characterized in that in above-mentioned kneading mud refining process, every the turning direction of 5-10 minute adjustment kneader.
5. the mud refining method of a kind of silicon carbide honeycomb ceramics pug according to claim 4, it is characterized in that twice old process in above-mentioned processing step is placed on by pug on lighttight indoor shelf, keep room temp at about 10-25 DEG C, atmospheric moisture leaves standstill under 40%-70% condition.
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| CN105503232A (en) * | 2015-12-01 | 2016-04-20 | 南京柯瑞特种陶瓷股份有限公司 | Preparation of wall-flow SiC honeycomb ceramic filter |
| CN106631123A (en) * | 2017-01-10 | 2017-05-10 | 中国建筑材料科学研究总院 | Honeycomb-shaped silicon carbide ceramic carrier, and preparation method and application thereof |
| CN107459335A (en) * | 2017-08-31 | 2017-12-12 | 常州市丰瑞电子有限公司 | A kind of preparation method of ceramic honey comb heat-storing material |
| CN111018544A (en) * | 2019-10-25 | 2020-04-17 | 界首市伟盛古窑彩陶制作发展有限公司 | Preparation process of extrusion molding ceramic pug |
| CN111377723A (en) * | 2020-03-24 | 2020-07-07 | 洛阳中超新材料股份有限公司 | Low-cost environment-friendly corundum-mullite honeycomb ceramic heat accumulator and preparation method thereof |
| CN115286417A (en) * | 2022-08-11 | 2022-11-04 | 云南菲尔特环保科技股份有限公司 | Recycling method of honeycomb ceramic waste |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN105503232A (en) * | 2015-12-01 | 2016-04-20 | 南京柯瑞特种陶瓷股份有限公司 | Preparation of wall-flow SiC honeycomb ceramic filter |
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| CN111018544A (en) * | 2019-10-25 | 2020-04-17 | 界首市伟盛古窑彩陶制作发展有限公司 | Preparation process of extrusion molding ceramic pug |
| CN111377723A (en) * | 2020-03-24 | 2020-07-07 | 洛阳中超新材料股份有限公司 | Low-cost environment-friendly corundum-mullite honeycomb ceramic heat accumulator and preparation method thereof |
| CN111377723B (en) * | 2020-03-24 | 2020-11-03 | 洛阳中超新材料股份有限公司 | Low-cost environment-friendly corundum-mullite honeycomb ceramic heat accumulator and preparation method thereof |
| CN115286417A (en) * | 2022-08-11 | 2022-11-04 | 云南菲尔特环保科技股份有限公司 | Recycling method of honeycomb ceramic waste |
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Application publication date: 20150902 |