CN116375503A - Composite ceramic supporting plate - Google Patents
Composite ceramic supporting plate Download PDFInfo
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- CN116375503A CN116375503A CN202310197416.6A CN202310197416A CN116375503A CN 116375503 A CN116375503 A CN 116375503A CN 202310197416 A CN202310197416 A CN 202310197416A CN 116375503 A CN116375503 A CN 116375503A
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- 239000000919 ceramic Substances 0.000 title claims abstract description 34
- 239000002131 composite material Substances 0.000 title claims abstract description 32
- PNEYBMLMFCGWSK-UHFFFAOYSA-N aluminium oxide Inorganic materials [O-2].[O-2].[O-2].[Al+3].[Al+3] PNEYBMLMFCGWSK-UHFFFAOYSA-N 0.000 claims abstract description 78
- 239000011248 coating agent Substances 0.000 claims abstract description 75
- 238000000576 coating method Methods 0.000 claims abstract description 75
- 239000000843 powder Substances 0.000 claims abstract description 66
- 229910010271 silicon carbide Inorganic materials 0.000 claims abstract description 55
- HBMJWWWQQXIZIP-UHFFFAOYSA-N silicon carbide Chemical compound [Si+]#[C-] HBMJWWWQQXIZIP-UHFFFAOYSA-N 0.000 claims abstract description 51
- 238000005245 sintering Methods 0.000 claims abstract description 15
- 238000000034 method Methods 0.000 claims abstract description 7
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 22
- GRYLNZFGIOXLOG-UHFFFAOYSA-N Nitric acid Chemical compound O[N+]([O-])=O GRYLNZFGIOXLOG-UHFFFAOYSA-N 0.000 claims description 11
- 229910017604 nitric acid Inorganic materials 0.000 claims description 11
- NBIIXXVUZAFLBC-UHFFFAOYSA-N Phosphoric acid Chemical compound OP(O)(O)=O NBIIXXVUZAFLBC-UHFFFAOYSA-N 0.000 claims description 10
- 239000000853 adhesive Substances 0.000 claims description 8
- 230000001070 adhesive effect Effects 0.000 claims description 8
- 238000002156 mixing Methods 0.000 claims description 7
- RGPUVZXXZFNFBF-UHFFFAOYSA-K diphosphonooxyalumanyl dihydrogen phosphate Chemical compound [Al+3].OP(O)([O-])=O.OP(O)([O-])=O.OP(O)([O-])=O RGPUVZXXZFNFBF-UHFFFAOYSA-K 0.000 claims description 6
- 229910000147 aluminium phosphate Inorganic materials 0.000 claims description 5
- 239000001768 carboxy methyl cellulose Substances 0.000 claims description 5
- 239000004372 Polyvinyl alcohol Substances 0.000 claims description 4
- WNROFYMDJYEPJX-UHFFFAOYSA-K aluminium hydroxide Chemical compound [OH-].[OH-].[OH-].[Al+3] WNROFYMDJYEPJX-UHFFFAOYSA-K 0.000 claims description 4
- 229910001593 boehmite Inorganic materials 0.000 claims description 4
- 238000001035 drying Methods 0.000 claims description 4
- FAHBNUUHRFUEAI-UHFFFAOYSA-M hydroxidooxidoaluminium Chemical compound O[Al]=O FAHBNUUHRFUEAI-UHFFFAOYSA-M 0.000 claims description 4
- 229920002451 polyvinyl alcohol Polymers 0.000 claims description 4
- 229920002134 Carboxymethyl cellulose Polymers 0.000 claims description 3
- VXAUWWUXCIMFIM-UHFFFAOYSA-M aluminum;oxygen(2-);hydroxide Chemical compound [OH-].[O-2].[Al+3] VXAUWWUXCIMFIM-UHFFFAOYSA-M 0.000 claims description 3
- KGBXLFKZBHKPEV-UHFFFAOYSA-N boric acid Chemical compound OB(O)O KGBXLFKZBHKPEV-UHFFFAOYSA-N 0.000 claims description 3
- 239000004327 boric acid Substances 0.000 claims description 3
- 235000010948 carboxy methyl cellulose Nutrition 0.000 claims description 3
- 239000008112 carboxymethyl-cellulose Substances 0.000 claims description 3
- 241000220479 Acacia Species 0.000 claims description 2
- 235000010643 Leucaena leucocephala Nutrition 0.000 claims description 2
- 239000002033 PVDF binder Substances 0.000 claims description 2
- 229920003171 Poly (ethylene oxide) Polymers 0.000 claims description 2
- DPXJVFZANSGRMM-UHFFFAOYSA-N acetic acid;2,3,4,5,6-pentahydroxyhexanal;sodium Chemical compound [Na].CC(O)=O.OCC(O)C(O)C(O)C(O)C=O DPXJVFZANSGRMM-UHFFFAOYSA-N 0.000 claims description 2
- 239000011230 binding agent Substances 0.000 claims description 2
- 229920003064 carboxyethyl cellulose Polymers 0.000 claims description 2
- 239000013078 crystal Substances 0.000 claims description 2
- 230000004927 fusion Effects 0.000 claims description 2
- TWNQGVIAIRXVLR-UHFFFAOYSA-N oxo(oxoalumanyloxy)alumane Chemical compound O=[Al]O[Al]=O TWNQGVIAIRXVLR-UHFFFAOYSA-N 0.000 claims description 2
- 229920001490 poly(butyl methacrylate) polymer Polymers 0.000 claims description 2
- 229920003229 poly(methyl methacrylate) Polymers 0.000 claims description 2
- 229920002401 polyacrylamide Polymers 0.000 claims description 2
- 229920002239 polyacrylonitrile Polymers 0.000 claims description 2
- 229920000120 polyethyl acrylate Polymers 0.000 claims description 2
- 239000004926 polymethyl methacrylate Substances 0.000 claims description 2
- 229920002689 polyvinyl acetate Polymers 0.000 claims description 2
- 239000011118 polyvinyl acetate Substances 0.000 claims description 2
- 235000019422 polyvinyl alcohol Nutrition 0.000 claims description 2
- 229920002981 polyvinylidene fluoride Polymers 0.000 claims description 2
- 229920000036 polyvinylpyrrolidone Polymers 0.000 claims description 2
- 239000001267 polyvinylpyrrolidone Substances 0.000 claims description 2
- 235000013855 polyvinylpyrrolidone Nutrition 0.000 claims description 2
- 235000019812 sodium carboxymethyl cellulose Nutrition 0.000 claims description 2
- 229920001027 sodium carboxymethylcellulose Polymers 0.000 claims description 2
- 229920003048 styrene butadiene rubber Polymers 0.000 claims description 2
- 238000004519 manufacturing process Methods 0.000 claims 1
- 239000000758 substrate Substances 0.000 abstract description 6
- 238000010438 heat treatment Methods 0.000 abstract description 5
- 230000003647 oxidation Effects 0.000 abstract description 5
- 238000007254 oxidation reaction Methods 0.000 abstract description 5
- 230000001590 oxidative effect Effects 0.000 abstract description 3
- 238000001816 cooling Methods 0.000 abstract description 2
- 230000003628 erosive effect Effects 0.000 abstract 1
- 239000011259 mixed solution Substances 0.000 description 8
- 230000000052 comparative effect Effects 0.000 description 7
- 238000001354 calcination Methods 0.000 description 6
- 239000000463 material Substances 0.000 description 4
- 239000000243 solution Substances 0.000 description 4
- 230000000694 effects Effects 0.000 description 3
- 238000002360 preparation method Methods 0.000 description 3
- 239000002994 raw material Substances 0.000 description 3
- CURLTUGMZLYLDI-UHFFFAOYSA-N Carbon dioxide Chemical compound O=C=O CURLTUGMZLYLDI-UHFFFAOYSA-N 0.000 description 2
- 235000010489 acacia gum Nutrition 0.000 description 2
- 239000001785 acacia senegal l. willd gum Substances 0.000 description 2
- 239000000203 mixture Substances 0.000 description 2
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N Silicium dioxide Chemical compound O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 239000001569 carbon dioxide Substances 0.000 description 1
- 229910002092 carbon dioxide Inorganic materials 0.000 description 1
- 238000005485 electric heating Methods 0.000 description 1
- 239000011521 glass Substances 0.000 description 1
- 238000000227 grinding Methods 0.000 description 1
- 238000011031 large-scale manufacturing process Methods 0.000 description 1
- 230000007774 longterm Effects 0.000 description 1
- 239000011819 refractory material Substances 0.000 description 1
- 239000007921 spray Substances 0.000 description 1
Images
Classifications
-
- 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
- C04B41/00—After-treatment of mortars, concrete, artificial stone or ceramics; Treatment of natural stone
- C04B41/80—After-treatment of mortars, concrete, artificial stone or ceramics; Treatment of natural stone of only ceramics
- C04B41/81—Coating or impregnation
- C04B41/85—Coating or impregnation with inorganic materials
- C04B41/87—Ceramics
-
- 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
- C04B41/00—After-treatment of mortars, concrete, artificial stone or ceramics; Treatment of natural stone
- C04B41/009—After-treatment of mortars, concrete, artificial stone or ceramics; Treatment of natural stone characterised by the material treated
-
- 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
- C04B41/00—After-treatment of mortars, concrete, artificial stone or ceramics; Treatment of natural stone
- C04B41/45—Coating or impregnating, e.g. injection in masonry, partial coating of green or fired ceramics, organic coating compositions for adhering together two concrete elements
- C04B41/50—Coating or impregnating, e.g. injection in masonry, partial coating of green or fired ceramics, organic coating compositions for adhering together two concrete elements with inorganic materials
- C04B41/5025—Coating or impregnating, e.g. injection in masonry, partial coating of green or fired ceramics, organic coating compositions for adhering together two concrete elements with inorganic materials with ceramic materials
- C04B41/5031—Alumina
Abstract
The invention discloses a composite ceramic supporting plate, which belongs to the technical field of composite materials, wherein the main body of the ceramic supporting plate is a silicon carbide plate, the surface of the silicon carbide plate is coated with an ultrafine alumina powder coating and a common alumina powder coating, and the ultrafine alumina powder coating has stronger adhesion with a silicon carbide substrate and a common alumina coating, so that the coating can be prevented from falling off in the high-temperature use process, the primary grain size is small, the mechanical strength is low after sintering, and the silicon carbide substrate can be corroded by an oxidizing atmosphere through cracks; the adhesion between the common alumina powder coating and the silicon carbide is poor, the sintered coating has good density and high mechanical strength, and the silicon carbide substrate can be better protected from oxidation erosion; the composite ceramic supporting plate has high strength in a high-temperature environment, strong bearing capacity, good high-temperature resistance and oxidation resistance in the use process, low thermal expansion coefficient and capability of bearing severe environments of repeated heating and cooling.
Description
Technical Field
The invention belongs to the technical field of composite materials, and particularly relates to a composite ceramic supporting plate.
Background
The products prepared from silicon carbide are widely used in industry, and are good electric heating materials and grinding materials, but the largest use of silicon carbide is used as refractory materials in industrial kilns, for example, the base materials used in tunnel kilns at present are silicon carbide plates.
The silicon carbide has the characteristics of high strength, high hardness, high softening point under load, high heat conduction speed and the like, is not easy to shrink and deform at high temperature, and is durable and long in service life. The silicon carbide plate substrate is high-temperature resistant, but is expensive due to material reasons, is limited to a certain extent in application, is particularly high in consumption in the use of oxidizing atmosphere, is easy to oxidize into carbon dioxide and silica glass to form melt glass, so that the silicon carbide plate is thinned, the strength is low, and the service life is shortened.
Disclosure of Invention
Therefore, the invention aims to provide a composite ceramic supporting plate to solve the problems of poor high temperature resistance and oxidation resistance and short service life of a silicon carbide plate used in a conventional high temperature kiln.
In order to achieve the above purpose, the present invention provides the following technical solutions: a composite ceramic supporting plate is characterized in that the main body of the ceramic supporting plate is a silicon carbide plate, and the surface of the silicon carbide plate is further coated with an ultrafine alumina powder coating and a common alumina powder coating in sequence.
Further, the silicon carbide content in the silicon carbide plate is more than 95%, the compressive strength of the silicon carbide plate is more than 90Mpa, and the volume density is 2.55-2.65g/cm < 3 >.
Further, the superfine alumina powder coating is obtained by coating a fusion solution of superfine alumina powder, nitric acid and water, wherein the mass ratio of the superfine alumina powder to the nitric acid to the water is (30-100): (50-95): (5-50); the superfine alumina powder is prepared by mixing one or more of aluminum hydroxide, boehmite, pseudo-boehmite and active alumina, and the D50 of the superfine alumina powder is 0.1-5 mu m.
Further, the common alumina powder coating is obtained by coating a solution of common alumina powder, a sintering aid, an organic adhesive and water, wherein the mass ratio of the common alumina powder to the sintering aid to the organic adhesive to the water is (40-100): (1-30): (1-20): (10-150); the common alumina powder is alumina micropowder, the D50 is 5-50 mu m, wherein the alumina content is more than 95%, and the main crystal phase is alpha phase.
Further, the sintering aid is one or more of phosphoric acid, aluminum dihydrogen phosphate, boric acid and aluminum oxide; the organic adhesive is one or more of polyvinyl alcohol, carboxymethyl cellulose, sodium carboxymethyl cellulose, carboxyethyl cellulose, polymethyl methacrylate, polyvinyl acetate, polybutyl methacrylate, polyethyl acrylate, polyethylene oxide, polyacrylonitrile, polyvinylpyrrolidone, polyacrylamide, styrene-butadiene rubber, polyvinylidene fluoride and acacia.
Further, the ordinary alumina powder: sintering aid: the mass ratio of the organic binders is (40-98): (1-30): (1-60).
Further, the preparation method of the composite ceramic support plate comprises the following steps:
s1, preparing and mixing superfine alumina powder, nitric acid and water according to a proportion, coating the superfine alumina powder on the surface of a silicon carbide plate, and drying the silicon carbide plate to form a superfine alumina powder coating;
s2, preparing common alumina powder, a sintering aid, an organic adhesive and water according to a proportion, coating the prepared common alumina powder on the surface of the superfine alumina powder coating, and drying the prepared common alumina powder to form the common alumina powder coating;
and S3, placing the silicon carbide plate coated with the common alumina powder coating in the step S2 into 1400-1800 ℃ for sintering to obtain a finished product of the composite ceramic support plate.
Further, the thickness of the coating in the step S1 is 0.1-2mm, and the thickness of the coating in the step S2 is 0.5-5mm.
The invention has the beneficial effects that:
1. the composite ceramic supporting plate has high strength in a high-temperature environment, strong bearing capacity, good high-temperature resistance and oxidation resistance in the use process, low thermal expansion coefficient, capability of bearing the severe environment of repeated heating and cooling, long-term use below 1800 ℃, 3-5 times improvement of the service life compared with a silicon carbide plate without a coating, and less than 15% increase of cost;
2. the application sprays superfine alumina powder coating earlier, the alumina granularity that uses in the superfine alumina powder coating is little, the activity is higher, all have stronger adhesion between this coating and the carborundum base plate and the ordinary alumina coating, can guarantee that the coating can not drop in the high temperature use, because superfine alumina powder primary grain size is little, mechanical strength is low after the sintering, crack appears easily in the use, oxidizing atmosphere can erode the carborundum base plate through the crack, ordinary alumina powder coating granularity is big, the activity is lower, the adhesion with carborundum is relatively poor, but the coating density after the sintering is good, mechanical strength is high, the protection carborundum base plate that can be better is eroded by oxidation.
3. The preparation method has the advantages of easily available raw materials, simple preparation process and convenience for large-scale production and application.
Additional advantages, objects, and features of the invention will be set forth in part in the description which follows and in part will become apparent to those having ordinary skill in the art upon examination of the following or may be learned from practice of the invention.
The objects and other advantages of the invention may be realized and obtained by means of the instrumentalities and combinations particularly pointed out in the specification.
Drawings
In order to make the objects, technical solutions and advantageous effects of the present invention more clear, the present invention provides the following drawings for description:
fig. 1 is a schematic structural view of the present invention.
The figures are marked as follows: silicon carbide plate 1, superfine alumina powder coating 2 and common alumina powder coating 3.
Detailed Description
Example 1
S1, aluminum hydroxide with D50 of 1 μm, nitric acid and water are mixed according to the mass ratio of 65:75:35, coating the mixed solution on the surface of the silicon carbide plate to form an ultrafine alumina powder coating with the thickness of 0.5mm, naturally airing the coating,
s2, alumina micropowder with the D50 of 5 mu m, aluminum dihydrogen phosphate, polyvinyl alcohol and water are mixed according to the mass ratio of 45:28:5:145, uniformly coating the mixed solution on the surface of the superfine alumina powder coating in the step S1, wherein the thickness of the coating is 2mm, and naturally airing the coated silicon carbide plate;
and S3, calcining the silicon carbide plate with the surface coated with the common alumina powder coating in a shuttle kiln at 1600 ℃ for 4 hours to obtain the composite ceramic support plate.
Example 2
S1, pseudo-boehmite with D50 of 1.5 mu m, nitric acid and water are mixed according to a mass ratio of 35:75:45, coating the mixed solution on the surface of a silicon carbide plate to form an ultrafine alumina powder coating, wherein the thickness of the coating is 0.8mm, and naturally airing;
s2, mixing alumina micro powder with the D50 of 10 mu m, phosphoric acid, boric acid, carboxymethyl cellulose and water according to the mass ratio of 95:28:15:140, uniformly coating the mixed solution on the surface of the superfine alumina powder coating in the step S1, wherein the thickness of the coating is 3mm, and naturally airing the coated silicon carbide plate;
and S3, calcining the silicon carbide plate with the surface coated with the common alumina powder coating in a shuttle kiln at 1750 ℃ for 3 hours to obtain the composite ceramic support plate.
Example 3
S1, boehmite with a D50 position of 0.8 mu m, nitric acid and water are mixed according to a mass ratio of 95:80:10, coating the mixed solution on the surface of a silicon carbide plate to form an ultrafine alumina powder coating, wherein the thickness of the coating is 1.5mm, and naturally airing the coating;
s2, mixing alumina micro powder with the D50 of 10 mu m, phosphoric acid, aluminum dihydrogen phosphate, arabic gum and water according to the mass ratio of 70:10:5:20, uniformly coating the mixed solution on the surface of the superfine alumina powder coating in the step S1, wherein the thickness of the coating is 2mm, and naturally airing the coated silicon carbide plate;
and S3, calcining the silicon carbide plate with the surface coated with the common alumina powder coating in a shuttle kiln at 1550 ℃ for 8 hours to obtain the composite ceramic support plate.
In order to demonstrate the superiority of the raw material ratios of the present application, comparative examples 1 to 2 are also provided herein.
Comparative example 1:
(1) Aluminum hydroxide with D50 of 1 μm, nitric acid and water are mixed according to the mass ratio of 80:20:100, coating the mixture on the surface of a silicon carbide plate with the thickness of 2.5mm, and naturally airing the coated silicon carbide plate;
(2) And (3) calcining the coated silicon carbide plate prepared in the step (1) in a shuttle kiln at 1600 ℃ for 4 hours to obtain the composite ceramic support plate.
Comparative example 2:
(1) Alumina micropowder with D50 of 5 mu m, aluminum dihydrogen phosphate, polyvinyl alcohol and water are mixed according to the mass ratio of 80:10:2:120, uniformly coating the mixture on the silicon carbide plate prepared in the step (1) with the thickness of 2.5mm, and naturally airing the coated silicon carbide plate;
(2) And (3) calcining the coated silicon carbide plate prepared in the step (1) in a shuttle kiln at 1600 ℃ for 4 hours to obtain the composite ceramic support plate.
Comparative example 3:
s1, boehmite with a D50 position of 0.8 mu m, nitric acid and water are mixed according to a mass ratio of 20:30:70, coating the mixed solution on the surface of the silicon carbide plate to form an ultrafine alumina powder coating with the thickness of 1.5mm, and naturally airing;
s2, mixing alumina micropowder with D50 of 10 mu m, phosphoric acid, aluminum dihydrogen phosphate, arabic gum and water according to a mass ratio of 110:50:0:170, uniformly coating the mixed solution on the surface of the superfine alumina powder coating in the step S1, wherein the thickness of the coating is 2mm, and naturally airing the coated silicon carbide plate;
and S3, calcining the silicon carbide plate with the surface coated with the common alumina powder coating in a shuttle kiln at 1550 ℃ for 8 hours to obtain the composite ceramic support plate.
The following table shows the service lives of the silicon carbide substrates, examples 1-3, and comparative examples 1-2 composite ceramic support plates:
from the above table, it can be seen that: the composite ceramic support plate prepared by the method of the embodiment 1-3 can still be used for more than 130 times in a severe heating environment; the composite ceramic support plate prepared by the methods of comparative examples 1-2 has obviously reduced use times under severe heating environments, and the prepared composite ceramic support plate has obviously reduced use times under severe heating environments after the raw materials of comparative example 3 are out of range, but the use times of the silicon carbide substrate is only 40, which is not satisfactory.
Finally, it is noted that the above-mentioned preferred embodiments are only intended to illustrate rather than limit the invention, and that, although the invention has been described in detail by means of the above-mentioned preferred embodiments, it will be understood by those skilled in the art that various changes in form and details may be made therein without departing from the scope of the invention as defined by the appended claims.
Claims (8)
1. A composite ceramic support plate, characterized in that: the ceramic supporting plate is characterized in that the main body of the ceramic supporting plate is a silicon carbide plate, and the surface of the silicon carbide plate is further coated with an ultrafine alumina powder coating and a common alumina powder coating in sequence.
2. A composite ceramic support plate according to claim 1, wherein: the silicon carbide content in the silicon carbide plate is more than 95%, the compressive strength of the silicon carbide plate is more than 90Mpa, and the volume density is 2.55-2.65g/cm < 3 >.
3. A composite ceramic support plate according to claim 2, wherein: the superfine alumina powder coating is obtained by coating a fusion solution of superfine alumina powder, nitric acid and water, wherein the mass ratio of the superfine alumina powder to the nitric acid to the water is (30-100): (50-95): (5-50); the superfine alumina powder is prepared by mixing one or more of aluminum hydroxide, boehmite, pseudo-boehmite and active alumina, and the D50 of the superfine alumina powder is 0.1-5 mu m.
4. A composite ceramic support plate according to claim 1, wherein: the common alumina powder coating is prepared by coating a solution of common alumina powder, a sintering aid, an organic adhesive and water, wherein the mass ratio of the common alumina powder to the sintering aid to the organic adhesive to the water is (40-100): (1-30): (1-20): (10-150); the common alumina powder is alumina micropowder, the D50 is 5-50 mu m, wherein the alumina content is more than 95%, and the main crystal phase is alpha phase.
5. A composite ceramic support plate according to claim 4, wherein: the sintering aid is one or more of phosphoric acid, aluminum dihydrogen phosphate, boric acid and aluminum oxide; the organic adhesive is one or more of polyvinyl alcohol, carboxymethyl cellulose, sodium carboxymethyl cellulose, carboxyethyl cellulose, polymethyl methacrylate, polyvinyl acetate, polybutyl methacrylate, polyethyl acrylate, polyethylene oxide, polyacrylonitrile, polyvinylpyrrolidone, polyacrylamide, styrene-butadiene rubber, polyvinylidene fluoride and acacia.
6. A composite ceramic support plate according to claim 5, wherein: the common alumina powder: sintering aid: the mass ratio of the organic binders is (40-98): (1-30): (1-60).
7. A composite ceramic support plate according to any one of claims 1 to 6, further comprising a method for producing a composite ceramic support plate, characterized in that: the method comprises the following steps:
s1, preparing and mixing superfine alumina powder, nitric acid and water according to a proportion, coating the superfine alumina powder on the surface of a silicon carbide plate, and drying the silicon carbide plate to form a superfine alumina powder coating;
s2, preparing common alumina powder, a sintering aid, an organic adhesive and water according to a proportion, coating the prepared common alumina powder on the surface of the superfine alumina powder coating, and drying the prepared common alumina powder to form the common alumina powder coating;
and S3, placing the silicon carbide plate coated with the common alumina powder coating in the step S2 into 1400-1800 ℃ for sintering to obtain a finished product of the composite ceramic support plate.
8. The method for preparing the composite ceramic support plate according to claim 7, characterized in that: the thickness of the coating in the step S1 is 0.1-2mm, and the thickness of the coating in the step S2 is 0.5-5mm.
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| CN202310197416.6A CN116375503A (en) | 2023-03-03 | 2023-03-03 | Composite ceramic supporting plate |
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2023
- 2023-03-03 CN CN202310197416.6A patent/CN116375503A/en active Pending
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