CN115159987A - Preparation method of carbon-based composite ceramic underflow port - Google Patents
Preparation method of carbon-based composite ceramic underflow port Download PDFInfo
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- CN115159987A CN115159987A CN202210855065.9A CN202210855065A CN115159987A CN 115159987 A CN115159987 A CN 115159987A CN 202210855065 A CN202210855065 A CN 202210855065A CN 115159987 A CN115159987 A CN 115159987A
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- 239000000919 ceramic Substances 0.000 title claims abstract description 65
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 title claims abstract description 50
- 229910052799 carbon Inorganic materials 0.000 title claims abstract description 47
- 239000002131 composite material Substances 0.000 title claims abstract description 45
- 238000002360 preparation method Methods 0.000 title claims abstract description 15
- 238000005245 sintering Methods 0.000 claims abstract description 26
- 239000000843 powder Substances 0.000 claims abstract description 23
- 238000002156 mixing Methods 0.000 claims abstract description 13
- 239000011812 mixed powder Substances 0.000 claims abstract description 11
- 239000002002 slurry Substances 0.000 claims abstract description 11
- 239000011230 binding agent Substances 0.000 claims abstract description 8
- 238000010438 heat treatment Methods 0.000 claims abstract description 8
- 238000001035 drying Methods 0.000 claims abstract description 7
- 238000000034 method Methods 0.000 claims abstract description 7
- 238000001816 cooling Methods 0.000 claims abstract description 6
- 239000000203 mixture Substances 0.000 claims description 17
- IJGRMHOSHXDMSA-UHFFFAOYSA-N Atomic nitrogen Chemical compound N#N IJGRMHOSHXDMSA-UHFFFAOYSA-N 0.000 claims description 12
- NINIDFKCEFEMDL-UHFFFAOYSA-N Sulfur Chemical compound [S] NINIDFKCEFEMDL-UHFFFAOYSA-N 0.000 claims description 6
- 229910000288 alkali metal carbonate Inorganic materials 0.000 claims description 6
- 150000008041 alkali metal carbonates Chemical class 0.000 claims description 6
- 229910001963 alkali metal nitrate Inorganic materials 0.000 claims description 6
- 229910052936 alkali metal sulfate Inorganic materials 0.000 claims description 6
- 239000003575 carbonaceous material Substances 0.000 claims description 6
- 125000005842 heteroatom Chemical group 0.000 claims description 6
- 229910052751 metal Inorganic materials 0.000 claims description 6
- 239000002184 metal Substances 0.000 claims description 6
- 229910052757 nitrogen Inorganic materials 0.000 claims description 6
- 150000003839 salts Chemical class 0.000 claims description 6
- 229910052717 sulfur Inorganic materials 0.000 claims description 6
- 239000011593 sulfur Substances 0.000 claims description 6
- 150000004767 nitrides Chemical class 0.000 claims description 4
- 229910052723 transition metal Inorganic materials 0.000 claims description 3
- 229910000314 transition metal oxide Inorganic materials 0.000 claims description 3
- 230000009286 beneficial effect Effects 0.000 abstract description 2
- 239000007788 liquid Substances 0.000 description 3
- 238000005299 abrasion Methods 0.000 description 2
- 230000009471 action Effects 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 239000000463 material Substances 0.000 description 2
- 239000002245 particle Substances 0.000 description 2
- 238000002791 soaking Methods 0.000 description 2
- NBGQZFQREPIKMG-UHFFFAOYSA-N 3beta-hydroxy-beta-boswellic acid Natural products C1CC(O)C(C)(C(O)=O)C2CCC3(C)C4(C)CCC5(C)CCC(C)C(C)C5C4=CCC3C21C NBGQZFQREPIKMG-UHFFFAOYSA-N 0.000 description 1
- 229910000975 Carbon steel Inorganic materials 0.000 description 1
- -1 acetyl boswellic acid modified carbon nano tube Chemical class 0.000 description 1
- 239000000956 alloy Substances 0.000 description 1
- 229910045601 alloy Inorganic materials 0.000 description 1
- 239000010962 carbon steel Substances 0.000 description 1
- 238000005266 casting Methods 0.000 description 1
- 230000008859 change Effects 0.000 description 1
- 239000003245 coal Substances 0.000 description 1
- 238000013329 compounding Methods 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 230000007613 environmental effect Effects 0.000 description 1
- 239000012535 impurity Substances 0.000 description 1
- 238000009776 industrial production Methods 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 238000005272 metallurgy Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 238000000465 moulding Methods 0.000 description 1
- 239000002952 polymeric resin Substances 0.000 description 1
- 239000004814 polyurethane Substances 0.000 description 1
- 229920002635 polyurethane Polymers 0.000 description 1
- 239000002994 raw material Substances 0.000 description 1
- 238000004062 sedimentation Methods 0.000 description 1
- 239000010935 stainless steel Substances 0.000 description 1
- 229910001220 stainless steel Inorganic materials 0.000 description 1
- 239000000126 substance Substances 0.000 description 1
- 229920003002 synthetic resin Polymers 0.000 description 1
Classifications
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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
- C04B35/00—Shaped ceramic products characterised by their composition; Ceramics compositions; Processing powders of inorganic compounds preparatory to the manufacturing of ceramic products
- C04B35/515—Shaped ceramic products characterised by their composition; Ceramics compositions; Processing powders of inorganic compounds preparatory to the manufacturing of ceramic products based on non-oxide ceramics
- C04B35/52—Shaped ceramic products characterised by their composition; Ceramics compositions; Processing powders of inorganic compounds preparatory to the manufacturing of ceramic products based on non-oxide ceramics based on carbon, e.g. graphite
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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
- C04B35/00—Shaped ceramic products characterised by their composition; Ceramics compositions; Processing powders of inorganic compounds preparatory to the manufacturing of ceramic products
- C04B35/622—Forming processes; Processing powders of inorganic compounds preparatory to the manufacturing of ceramic products
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- C—CHEMISTRY; METALLURGY
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- C04B2235/00—Aspects relating to ceramic starting mixtures or sintered ceramic products
- C04B2235/02—Composition of constituents of the starting material or of secondary phases of the final product
- C04B2235/30—Constituents and secondary phases not being of a fibrous nature
- C04B2235/38—Non-oxide ceramic constituents or additives
- C04B2235/3804—Borides
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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
- C04B2235/00—Aspects relating to ceramic starting mixtures or sintered ceramic products
- C04B2235/02—Composition of constituents of the starting material or of secondary phases of the final product
- C04B2235/30—Constituents and secondary phases not being of a fibrous nature
- C04B2235/38—Non-oxide ceramic constituents or additives
- C04B2235/3817—Carbides
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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
- C04B2235/00—Aspects relating to ceramic starting mixtures or sintered ceramic products
- C04B2235/02—Composition of constituents of the starting material or of secondary phases of the final product
- C04B2235/30—Constituents and secondary phases not being of a fibrous nature
- C04B2235/38—Non-oxide ceramic constituents or additives
- C04B2235/3852—Nitrides, e.g. oxynitrides, carbonitrides, oxycarbonitrides, lithium nitride, magnesium nitride
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- C04B2235/00—Aspects relating to ceramic starting mixtures or sintered ceramic products
- C04B2235/65—Aspects relating to heat treatments of ceramic bodies such as green ceramics or pre-sintered ceramics, e.g. burning, sintering or melting processes
- C04B2235/656—Aspects relating to heat treatments of ceramic bodies such as green ceramics or pre-sintered ceramics, e.g. burning, sintering or melting processes characterised by specific heating conditions during heat treatment
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- C04B2235/00—Aspects relating to ceramic starting mixtures or sintered ceramic products
- C04B2235/65—Aspects relating to heat treatments of ceramic bodies such as green ceramics or pre-sintered ceramics, e.g. burning, sintering or melting processes
- C04B2235/656—Aspects relating to heat treatments of ceramic bodies such as green ceramics or pre-sintered ceramics, e.g. burning, sintering or melting processes characterised by specific heating conditions during heat treatment
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Abstract
The invention provides a preparation method of a carbon-based composite ceramic underflow port, which comprises the following steps: s1, uniformly mixing carbon-based composite material powder and ceramic powder to form mixed powder; s2, mixing the mixed powder with a binder to prepare ceramic slurry containing the carbon-based composite material; s3, injecting the ceramic slurry into the bottom flow opening mold, and drying and forming to obtain a bottom flow opening prefabricated part; s4, putting the prefabricated member of the bottom flow opening into a vacuum furnace, heating to 800-900 ℃, sintering for 1-1.5 h, and then heating to 1200-2000 ℃, and sintering for 100-120h; and S5, after sintering, keeping the temperature for 6 to 8 hours, and then naturally cooling to obtain the carbon-based composite ceramic underflow port. The beneficial effects are as follows: the carbon-based composite ceramic underflow port prepared by the method can solve the problems of poor wear resistance and short service life of the underflow port, and the service life of the underflow port is 2 to 3 times that of the traditional ceramic underflow port.
Description
Technical Field
The invention relates to the field of carbon-based composite ceramics, in particular to a preparation method of a carbon-based composite ceramic underflow port.
Background
The cyclone is a common grading, sorting and concentrating device, consists of an overflow pipe, a material feeding body, a cone and a bottom flow port, works by adopting the principle of centrifugal sedimentation, and is widely applied to the industries of mines, chemical industry, coal, metallurgy, electric power environmental protection and the like. Liquid-liquid, solid-liquid and gas-liquid two-phase mixtures with certain concentration difference can be classified, sorted, concentrated and deslimed under the action of centrifugal force. In actual practice, the particle size, concentration and gradation of the raw materials are constantly changing. The original slurry concentration changes, the cyclone needs to be synchronously adjusted, otherwise, the operation effect of the cyclone deteriorates, and the working efficiency is seriously influenced. Changing the specification of the overflow pipe is time-consuming and labor-consuming, and usually the size of the underflow opening is first changed to change the flow rate and achieve the production index.
At present, a underflow port in a cyclone is made of two materials in a composite mode, a shell is made of common carbon steel or stainless steel, and the like, and an inner layer of a cavity is made of wear-resistant alloy, polyurethane or ceramic and the like. The wear resistance of the bottom flow opening is general, and under the condition that the technology is slowly updated for many years, the using effect of the bottom flow opening can not meet the actual industrial production requirement more and more, the replacement of the bottom flow opening is more complicated, and therefore, the actual requirement of the bottom flow opening with good wear resistance is larger and larger.
When a new underflow port is produced, the preparation method of the underflow port is updated at any time, and the product produced by the existing preparation method still has the defects of poor mechanical property and the like.
Disclosure of Invention
The invention provides a preparation method of a carbon-based composite ceramic underflow port, which aims to solve the problems in the prior art.
The technical scheme of the invention is realized as follows:
a preparation method of a carbon-based composite ceramic underflow port comprises the following steps:
s1, uniformly mixing carbon-based composite material powder and ceramic powder to obtain mixed powder;
s2, mixing the mixed powder with a binder to prepare ceramic slurry containing the carbon-based composite material;
s3, injecting the ceramic slurry into the bottom flow opening mold, and drying and forming to obtain a bottom flow opening prefabricated part;
s4, putting the prefabricated member of the bottom flow opening into a vacuum furnace, heating to 800-900 ℃, sintering for 1-1.5 h, and then heating to 1200-2000 ℃, and sintering for 100-120h;
and S5, after sintering, keeping the temperature for 6 to 8 hours, and then naturally cooling to obtain the carbon-based composite ceramic underflow port.
Further, in step S1, the composition of the ceramic powder is: the ceramic powder is one or more mixed ceramic powder of nitride ceramic, carbide ceramic and boride ceramic.
Further, in step S1, the carbon-based composite material: using an inorganic carbon material as a carbon source; the carbon-based composite material is prepared by using any one or a mixture of a sulfur source, a nitrogen source and a heteroatom metal source, directly putting a carbon material into the molten salt at the temperature of 120-1000 ℃ in an inert atmosphere, and soaking at the temperature to prepare the carbon-based composite material, wherein the sulfur source is alkali metal sulfate or a mixture of alkali metal carbonate and alkali metal sulfate, the nitrogen source is alkali metal nitrate or a mixture of alkali metal carbonate and alkali metal nitrate, and the heteroatom metal source is any one of salt of a transition metal element and oxide thereof.
Further, in step S3, the mixture is dried in a vacuum furnace at 300-500 ℃ for 18-24 hours.
Further, in the step S4, the mixture is sintered for 1 to 1.5 hours at the constant temperature within the range of 800 to 900 ℃, for 48 hours at the temperature within the range of 1200 to 1500 ℃, for 36 to 48hours at the constant temperature within the range of 1500 to 1800 ℃ and for 16 to 24hours at the constant temperature within the range of 1800 to 2000 ℃.
The invention has the beneficial effects that: the carbon-based composite ceramic underflow opening prepared by the method can solve the problems of poor abrasion resistance and short service life of the underflow opening, and the service life of the carbon-based composite ceramic underflow opening is 2 to 3 times that of the traditional ceramic underflow opening.
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be obtained by a person skilled in the art without inventive effort based on the embodiments of the present invention, are within the scope of the present invention.
A preparation method of a carbon-based composite ceramic underflow port comprises the following steps:
s1, uniformly mixing carbon-based composite material powder and ceramic powder to obtain mixed powder;
s2, mixing the mixed powder with a binder to prepare ceramic slurry containing the carbon-based composite material;
s3, injecting the ceramic slurry into the bottom flow opening mold, and drying and forming to obtain a bottom flow opening prefabricated part;
s4, putting the prefabricated member of the bottom flow opening into a vacuum furnace, heating to 800-900 ℃, sintering for 1-1.5 h, and then heating to 1200-2000 ℃, and sintering for 100-120h;
and S5, after sintering, keeping the temperature for 6 to 8 hours, and then naturally cooling to obtain the carbon-based composite ceramic underflow port.
In step S3, the mixture is dried in a vacuum furnace at 300-500 ℃ for 18 to 24 hours.
And in the step S4, sintering for 1 to 1.5 hours at constant temperature ranging from 800 to 900 ℃, sintering for 48 hours at 1200 to 1500 ℃, sintering for 36 to 48hours at constant temperature ranging from 1500 to 1800, and sintering for 16 to 24hours at constant temperature ranging from 1800 to 2000 ℃.
The first embodiment is as follows:
a preparation method of a carbon-based composite ceramic underflow port comprises the following steps:
s1, uniformly mixing carbon-based composite material powder and ceramic powder to obtain mixed powder;
s2, mixing ceramic powder, namely nitride ceramic and carbide ceramic, into ceramic powder, and mixing the ceramic powder with acetyl boswellic acid modified carbon nano tube to obtain a modified carbon nano tube, taking the modified carbon nano tube as a component of a carbon-based composite material, compounding the modified carbon nano tube with high polymer resin to obtain the carbon-based composite material, mixing the carbon-based composite material with the component according to the mass fraction of 15 percent;
s3, injecting the ceramic slurry into a bottom flow opening mold, drying and molding for 18 hours in a vacuum furnace at the temperature of 300-500 ℃ to obtain a bottom flow opening prefabricated part;
s4, placing the prefabricated member of the underflow opening into a vacuum furnace, sintering for 1 to 1.5 hours at constant temperature within the range of 800 to 900 ℃, sintering for 48 hours within the range of 1200 to 1500 ℃, sintering for 48 hours at constant temperature within the range of 1500 to 1800 ℃, and sintering for 16 hours at constant temperature within the range of 1800 to 2000 ℃;
and S5, after sintering, keeping the temperature for 6 to 8 hours, and then naturally cooling to obtain the carbon-based composite ceramic underflow port.
The second embodiment:
a preparation method of a carbon-based composite ceramic underflow port comprises the following steps:
s1, uniformly mixing carbon-based composite material powder and ceramic powder to form mixed powder, wherein the ceramic powder is mixed ceramic powder in nitride ceramics and boride ceramics, and an inorganic carbon material is used as a carbon source; directly putting a carbon material into the molten salt at the temperature of 120-1000 ℃ in an inert atmosphere by using any one or a mixture of a sulfur source, a nitrogen source and a heteroatom metal source, and soaking at the temperature to prepare the carbon-based composite material, wherein the sulfur source is alkali metal sulfate or a mixture of alkali metal carbonate and alkali metal sulfate, the nitrogen source is alkali metal nitrate or a mixture of alkali metal carbonate and alkali metal nitrate, and the heteroatom metal source is any one of salt of a transition metal element and oxide thereof;
s2, adding 20 percent of binder into the mixed powder, wherein the binder is not decomposed at high temperature, so that the prefabricated body can keep the original shape in the casting process, the binder and the carbon-based composite material have good affinity, and cannot exist in an abrasion-resistant part in the form of impurities, and adjacent ceramic particles are bonded together under the action of the binder and have good structural strength;
s3, injecting the ceramic slurry into the underflow port mold, drying for 22 hours in a vacuum furnace at the temperature of 300-500 ℃, and drying and forming to obtain an underflow port prefabricated part;
s4, placing the prefabricated member of the underflow opening into a vacuum furnace, sintering for 1 hour at constant temperature within the range of 800 to 900 ℃, sintering for 48 hours within the range of 1200 to 1500 ℃, sintering for 40 hours at constant temperature within the range of 1500 to 1800 ℃, and sintering for 20 hours at constant temperature within the range of 1800 to 2000 ℃;
s5, after sintering, preserving heat for 6 hours, and then naturally cooling to obtain the carbon-based composite ceramic underflow port.
The above description is only for the purpose of illustrating the preferred embodiments of the present invention and is not to be construed as limiting the invention, and any modifications, equivalents, improvements and the like that fall within the spirit and principle of the present invention are intended to be included therein.
Claims (5)
1. A preparation method of a carbon-based composite ceramic underflow port is characterized by comprising the following steps:
s1, uniformly mixing carbon-based composite material powder and ceramic powder to form mixed powder;
s2, mixing the mixed powder with a binder to prepare ceramic slurry containing the carbon-based composite material;
s3, injecting the ceramic slurry into the bottom flow opening mold, and drying and forming to obtain a bottom flow opening prefabricated part;
s4, putting the prefabricated member of the bottom flow opening into a vacuum furnace, heating to 800-900 ℃, sintering for 1-1.5 h, and then heating to 1200-2000 ℃, and sintering for 100-120h;
and S5, after sintering, keeping the temperature for 6 to 8 hours, and then naturally cooling to obtain the carbon-based composite ceramic underflow opening.
2. The preparation method of the carbon-based composite ceramic underflow opening according to claim 1, wherein the method comprises the following steps: in step S1, the composition of the ceramic powder is: the ceramic powder is one or more mixed ceramic powder of nitride ceramic, carbide ceramic and boride ceramic.
3. The method for preparing the carbon-based composite ceramic underflow port according to claim 1, wherein the method comprises the following steps: in step S1, the carbon-based composite material is: using an inorganic carbon material as a carbon source; any one or a mixture of a sulfur source, a nitrogen source and a heteroatom metal source is used, a carbon material is directly put into the molten salt in an inert atmosphere at the temperature of 120-1000 ℃, and is soaked at the temperature to prepare the carbon-based composite material, wherein the sulfur source is alkali metal sulfate or a mixture of alkali metal carbonate and alkali metal sulfate, the nitrogen source is alkali metal nitrate or a mixture of alkali metal carbonate and alkali metal nitrate, and the heteroatom metal source is any one of salt of a transition metal element and oxide thereof.
4. The preparation method of the carbon-based composite ceramic underflow opening according to claim 1, wherein the method comprises the following steps: in step S3, the mixture is dried in a vacuum furnace at 300-500 ℃ for 18 to 24 hours.
5. The preparation method of the carbon-based composite ceramic underflow opening according to claim 1, wherein the method comprises the following steps: in the step S4, the mixture is sintered for 1 to 1.5 hours at the constant temperature of 800 to 900 ℃, for 48 hours at 1200 to 1500 ℃, for 36 to 48hours at the constant temperature of 1500 to 1800 ℃ and for 16 to 24hours at the constant temperature of 1800 to 2000 ℃ in sequence.
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Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105924174A (en) * | 2016-04-26 | 2016-09-07 | 武汉大学 | Preparation method of carbon-based composite material |
| CN109650891A (en) * | 2019-01-18 | 2019-04-19 | 成都中超碳素科技有限公司 | It is a kind of carbon-based through type carbon ceramic composite material and preparation method thereof |
| CN113213936A (en) * | 2021-04-14 | 2021-08-06 | 中国科学院山西煤炭化学研究所 | Preparation method of ceramic powder doped modified self-sintered graphite composite material |
| CN114133221A (en) * | 2021-12-21 | 2022-03-04 | 八龙应用材料科技(海南)有限公司 | Carbon-ceramic composite heat insulation material and preparation method thereof |
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- 2022-07-20 CN CN202210855065.9A patent/CN115159987A/en active Pending
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105924174A (en) * | 2016-04-26 | 2016-09-07 | 武汉大学 | Preparation method of carbon-based composite material |
| CN109650891A (en) * | 2019-01-18 | 2019-04-19 | 成都中超碳素科技有限公司 | It is a kind of carbon-based through type carbon ceramic composite material and preparation method thereof |
| CN113213936A (en) * | 2021-04-14 | 2021-08-06 | 中国科学院山西煤炭化学研究所 | Preparation method of ceramic powder doped modified self-sintered graphite composite material |
| CN114133221A (en) * | 2021-12-21 | 2022-03-04 | 八龙应用材料科技(海南)有限公司 | Carbon-ceramic composite heat insulation material and preparation method thereof |
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