CN109232023A - A kind of preparation method of double coat of silicon carbide graphite load plates - Google Patents
A kind of preparation method of double coat of silicon carbide graphite load plates Download PDFInfo
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- CN109232023A CN109232023A CN201811009486.XA CN201811009486A CN109232023A CN 109232023 A CN109232023 A CN 109232023A CN 201811009486 A CN201811009486 A CN 201811009486A CN 109232023 A CN109232023 A CN 109232023A
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- mixed liquor
- graphite
- powder
- load plate
- agent
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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
- 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
- C04B41/89—Coating or impregnation for obtaining at least two superposed coatings having different compositions
-
- 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
- C04B41/52—Multiple coating or impregnating multiple coating or impregnating with the same composition or with compositions only differing in the concentration of the constituents, is classified as single coating or impregnation
Abstract
The invention discloses a kind of preparation methods of double coat of silicon carbide graphite load plates, comprising the following steps: graphite load plate surface is polished and is cleaned by ultrasonic；The mixed liquor that is made of α-SiC powder, graphite powder, dispersing agent, crosslinking agent and water simultaneously stirs evenly and adjusts pH value to 10~12, and then addition polymerization triggering agent obtains A mixed liquor；A mixed liquor is uniformly sprayed on graphite load plate surface, carries out being dried to graphite load plate dry tack free at 50~200 DEG C；The mixed liquor that is made of α-SiC powder, Si powder, dispersing agent, crosslinking agent and water simultaneously stirs evenly, and then addition polymerization triggering agent obtains B mixed liquor；After graphite load plate dip-coating B mixed liquor, carry out being dried to graphite load plate dry tack free at 50~200 DEG C；Graphite load plate is heat-treated, rise to 1400~1410 DEG C by room temperature and keeps the temperature 30~40min, MgO is then added and is continuously heating to 1700~1900 DEG C of 1~4h of heat preservation.The method of the present invention can obtain fine and close SiC coating, and solution sic coating surface is coarse, homogeneity difference problem.
Description
Technical field
The present invention relates to a kind of preparation methods of graphite load plate, more particularly to a kind of double coat of silicon carbide graphite load plates
Preparation method.
Background technique
On graphite load plate surface, setting coat of silicon carbide is remarkably improved graphite load plate service life, in the prior art in stone
Black surface, which prepares coat of silicon carbide and generallys use that graphite material is embedded in prefabricated powder heat, reacts obtained, these methods
Usually there is a problem of that coating service life easy to crack is short.
Summary of the invention
For above-mentioned prior art defect, task of the invention lies in provide a kind of system of double coat of silicon carbide graphite load plates
The problems such as Preparation Method solves sic coating surface reflection differences, and homogeneity is bad is reduced coating cracking, stomata and pin hole and is asked
Topic.
The technical scheme is that such: a kind of preparation method of double coat of silicon carbide graphite load plates, including following step
It is rapid:
Step 1: graphite load plate surface is polished and is cleaned by ultrasonic；
Step 2: the mixed liquor that is made of α-SiC powder, graphite powder, dispersing agent, crosslinking agent and water and stirring evenly and adjusting pH
For value to 10~12, then addition polymerization triggering agent obtains A mixed liquor；
A mixed liquor made from step 2 is uniformly sprayed on graphite load plate surface, is dried at 50~200 DEG C by step 3
To graphite load plate dry tack free；
Step 4: the mixed liquor that is made of α-SiC powder, Si powder, dispersing agent, crosslinking agent and water and stirring evenly, then add
Addition polymerization closes triggering agent and obtains B mixed liquor；
Step 5 will be dried after step 3 treated graphite load plate dip-coating B mixed liquor at 50~200 DEG C
To graphite load plate dry tack free；
Step 6, will by step 5, treated that graphite load plate is heat-treated, rise to 1400~1410 DEG C by room temperature
And 30~40min is kept the temperature, MgO additive is then added and is continuously heating to 1700~1900 DEG C of 1~4h of heat preservation.
Further, each when the mixed liquor that the step 2 is made of α-SiC powder, graphite powder, dispersing agent, crosslinking agent and water
1 part, 10~13 parts of graphite powder, 1~2 part of dispersing agent, 1~2 part of crosslinking agent, 1~2 part of water of the following α-SiC powder of constituent mass number.
Further, each group when mixed liquor that the step 4 is made of α-SiC powder, Si powder, dispersing agent, crosslinking agent and water
Divide 1 part, 10~13 parts of Si powder, 1~2 part of dispersing agent, 1~2 part of crosslinking agent, 1~2 part of water of the following α-SiC powder of mass fraction.
Further, the amount of addition polymerization triggering agent is the 90~110% of crosslinking agent in the step 2, the step 4
The amount of middle addition polymerization triggering agent is the 90~110% of crosslinking agent.
Further, the dispersing agent is acrylamide, the crosslinking agent is N, and N'- methylene-bisacrylamide is described
Polymerization triggering agent is ammonium persulfate.
Further, pH value is adjusted using tetramethylammonium hydroxide in the step 2.
The advantages of the present invention over the prior art are that:
The basal layer generated is combined by the spraying drying of A mixed liquor and graphite linings, is then dried by the immersion of B mixed liquor
The coating of the finer and close ring of light is generated, the interaction of solution A baking zone and B solution drying interlayer generates in the subsequent sintering process
Finer and close smooth, the high coating of reflectivity, solution SiC coating surface is coarse, homogeneity difference problem.
Specific embodiment
Below with reference to embodiment, the invention will be further described, but not as a limitation of the invention.
Embodiment 1
The preparation method of double coat of silicon carbide graphite load plates, comprising the following steps:
Step 1: polishing the 5 μm of diamond pastes in graphite load plate surface, it is then placed in ultrasonic wave in acetone solvent
Clean 30min；
Step 2: by 1 part of α-SiC powder, 10 parts of graphite powder, 1 part of acrylamide, N, 1 part of N'- methylene-bisacrylamide and
The mixed liquor of 1 part of water composition stirs time enough to uniform, then adjusts pH value to 10 using tetramethylammonium hydroxide, then adds
0.9 part of ammonium persulfate obtains A mixed liquor；
A mixed liquor made from step 2 is uniformly sprayed on graphite load plate surface by step 3, and be put into drying box 50 DEG C into
Row is dried to graphite load plate dry tack free；
Step 4: by 1 part of α-SiC powder, 10 parts of Si powder, 1 part of acrylamide, N, 1 part of N'- methylene-bisacrylamide and water
The mixed liquor of 1 part of composition simultaneously stirs evenly, and then adds 0.9 part of ammonium persulfate and obtains B mixed liquor；
Step 5 will carry out being dried to graphite at 50 DEG C after step 3 treated graphite load plate dip-coating B mixed liquor
Load plate dry tack free；
Step 6, will by step 5, treated that graphite load plate carries out heat treatment sintering, rise to 1400 DEG C simultaneously by room temperature
It keeps the temperature 30min and forms SiC/C gradient layer, continue thereafter with appreciation to 1900 DEG C of heat preservation 1h, form densification SiC protective layer.
Embodiment 2
The preparation method of double coat of silicon carbide graphite load plates, comprising the following steps:
Step 1: polishing the 5 μm of diamond pastes in graphite load plate surface, it is then placed in ultrasonic wave in acetone solvent
Clean 30min；
Step 2: by 1 part of α-SiC powder, 12 parts of graphite powder, 1.5 parts of acrylamide, N, N'- methylene-bisacrylamide 1.5
Part and the mixed liquors of 1.5 parts of water compositions stir time enough to uniform, then adjust pH value to 11, so using tetramethylammonium hydroxide
It adds 1.5 parts of ammonium persulfate afterwards and obtains A mixed liquor；
A mixed liquor made from step 2 is uniformly sprayed on graphite load plate surface, and is put into drying box at 125 DEG C by step 3
It carries out being dried to graphite load plate dry tack free；
Step 4: by 1 part of α-SiC powder, 12 parts of Si powder, 1.5 parts of acrylamide, N, 1.5 parts of N'- methylene-bisacrylamide
With 1.5 parts of water form mixed liquor and stir evenly, then add 1.5 parts of ammonium persulfate obtain B mixed liquor；
Step 5 will carry out being dried to stone at 125 DEG C after step 3 treated graphite load plate dip-coating B mixed liquor
Black load plate dry tack free；
Step 6, will by step 5, treated that graphite load plate carries out heat treatment sintering, rise to 1410 DEG C simultaneously by room temperature
It keeps the temperature 35min and forms SiC/C gradient layer, continue thereafter with appreciation to 1800 DEG C of heat preservation 2h, form densification SiC protective layer.
Embodiment 3
The preparation method of double coat of silicon carbide graphite load plates, comprising the following steps:
Step 1: polishing the 5 μm of diamond pastes in graphite load plate surface, it is then placed in ultrasonic wave in acetone solvent
Clean 30min；
Step 2: by 1 part of α-SiC powder, 13 parts of graphite powder, 2 parts of acrylamide, N, 2 parts of N'- methylene-bisacrylamide and
The mixed liquors of 2 parts of water compositions stir time enough to uniform, then adjust pH value to 12 using tetramethylammonium hydroxide, then add
2.2 parts of ammonium persulfate obtain A mixed liquor；
A mixed liquor made from step 2 is uniformly sprayed on graphite load plate surface, and is put into drying box at 200 DEG C by step 3
It carries out being dried to graphite load plate dry tack free；
Step 4: by 1 part of α-SiC powder, 13 parts of Si powder, 2 parts of acrylamide, N, 2 parts of N'- methylene-bisacrylamide and water
The mixed liquor of 2 parts of compositions simultaneously stirs evenly, and then adds 2.2 parts of ammonium persulfate and obtains B mixed liquor；
Step 5 will carry out being dried to stone at 200 DEG C after step 3 treated graphite load plate dip-coating B mixed liquor
Black load plate dry tack free；
Step 6, will by step 5, treated that graphite load plate carries out heat treatment sintering, rise to 1410 DEG C simultaneously by room temperature
It keeps the temperature 40min and forms SiC/C gradient layer, continue thereafter with appreciation to 1700 DEG C of heat preservation 4h, form densification SiC protective layer.
Embodiment 4
The preparation method of double coat of silicon carbide graphite load plates, comprising the following steps:
Step 1: polishing the 5 μm of diamond pastes in graphite load plate surface, it is then placed in ultrasonic wave in acetone solvent
Clean 30min；
Step 2: by 1 part of α-SiC powder, 12 parts of graphite powder, 1.5 parts of acrylamide, N, N'- methylene-bisacrylamide 1.5
Part and the mixed liquors of 1.5 parts of water compositions stir time enough to uniform, then adjust pH value to 12, so using tetramethylammonium hydroxide
It adds 1.6 parts of ammonium persulfate afterwards and obtains A mixed liquor；
A mixed liquor made from step 2 is uniformly sprayed on graphite load plate surface, and is put into drying box at 200 DEG C by step 3
It carries out being dried to graphite load plate dry tack free；
Step 4: by 1 part of α-SiC powder, 12 parts of Si powder, 1.5 parts of acrylamide, N, 1.5 parts of N'- methylene-bisacrylamide
With 1.5 parts of water form mixed liquor and stir evenly, then add 1.6 parts of ammonium persulfate obtain B mixed liquor；
Step 5 will carry out being dried to stone at 200 DEG C after step 3 treated graphite load plate dip-coating B mixed liquor
Black load plate dry tack free；
Step 6, will by step 5, treated that graphite load plate carries out heat treatment sintering, rise to 1410 DEG C simultaneously by room temperature
It keeps the temperature 40min and forms SiC/C gradient layer, continue thereafter with appreciation to 1700 DEG C of heat preservation 4h, form densification SiC protective layer.
Embodiment 5
The preparation method of double coat of silicon carbide graphite load plates, comprising the following steps:
Step 1: polishing the 5 μm of diamond pastes in graphite load plate surface, it is then placed in ultrasonic wave in acetone solvent
Clean 30min；
Step 2: by 1 part of α-SiC powder, 10 parts of graphite powder, 1 part of acrylamide, N, 1 part of N'- methylene-bisacrylamide and
The mixed liquor of 1 part of water composition stirs time enough to uniform, then adjusts pH value to 10 using tetramethylammonium hydroxide, then adds
1 part of ammonium persulfate obtains A mixed liquor；
A mixed liquor made from step 2 is uniformly sprayed on graphite load plate surface, and is put into drying box at 100 DEG C by step 3
It carries out being dried to graphite load plate dry tack free；
Step 4: by 1 part of α-SiC powder, 10 parts of Si powder, 1 part of acrylamide, N, 1 part of N'- methylene-bisacrylamide and water
The mixed liquor of 1 part of composition simultaneously stirs evenly, and then adds 1 part of ammonium persulfate and obtains B mixed liquor；
Step 5 will carry out being dried to stone at 100 DEG C after step 3 treated graphite load plate dip-coating B mixed liquor
Black load plate dry tack free；
Step 6, will by step 5, treated that graphite load plate carries out heat treatment sintering, rise to 1400 DEG C simultaneously by room temperature
It keeps the temperature 35min and forms SiC/C gradient layer, continue thereafter with appreciation to 1800 DEG C of heat preservation 2h, form densification SiC protective layer.
Coating density test and anti-oxidant test is carried out to above-mentioned each embodiment to be first to heat to specific using MoSi2 furnace
1200 DEG C of temperature, 1400 DEG C, 1600 DEG C are then placed in sample, keep specific time.1200 DEG C of holding 10h, after being cooled to room temperature
Weighing repeats 100 operations；1400 DEG C of holding 10h, weigh after being cooled to room temperature, are repeated 20 times operation；1600 DEG C of holding 5h,
It weighs, is repeated 4 times after being cooled to room temperature.Each embodiment result is as follows
Claims (6)
1. a kind of preparation method of double coat of silicon carbide graphite load plates, which comprises the following steps:
Step 1: graphite load plate surface is polished and is cleaned by ultrasonic；
Step 2: the mixed liquor that is made of α-SiC powder, graphite powder, dispersing agent, crosslinking agent and water and stirring evenly adjust pH value to
10~12, then addition polymerization triggering agent obtains A mixed liquor；
A mixed liquor made from step 2 is uniformly sprayed on graphite load plate surface by step 3, carries out being dried to stone at 50~200 DEG C
Black load plate dry tack free；
Step 4: the mixed liquor that is made of α-SiC powder, Si powder, dispersing agent, crosslinking agent and water and stirring evenly, then addition is poly-
It closes triggering agent and obtains B mixed liquor；
Step 5 will carry out being dried to stone at 50~200 DEG C after step 3 treated graphite load plate dip-coating B mixed liquor
Black load plate dry tack free；
Step 6, will by step 5, treated that graphite load plate is heat-treated, risen to 1400~1410 DEG C by room temperature and protected
30~40min of temperature then adds MgO additive and is continuously heating to 1700~1900 DEG C of 1~4h of heat preservation.
2. the preparation method of double coat of silicon carbide graphite load plates according to claim 1, which is characterized in that the step 2
1 part of the following α-SiC powder of each component mass fraction when the mixed liquor being made of α-SiC powder, graphite powder, dispersing agent, crosslinking agent and water,
10~13 parts of graphite powder, 1~2 part of dispersing agent, 1~2 part of crosslinking agent, 1~2 part of water.
3. the preparation method of double coat of silicon carbide graphite load plates according to claim 1, which is characterized in that the step 4
1 part of the following α-SiC powder of each component mass fraction, Si when the mixed liquor being made of α-SiC powder, Si powder, dispersing agent, crosslinking agent and water
10~13 parts of powder, 1~2 part of dispersing agent, 1~2 part of crosslinking agent, 1~2 part of water.
4. the preparation method of double coat of silicon carbide graphite load plates according to claim 1, which is characterized in that the step 2
The amount of middle addition polymerization triggering agent is the 90~110% of crosslinking agent, and the amount of addition polymerization triggering agent is crosslinking in the step 4
The 90~110% of agent.
5. the preparation method of double coat of silicon carbide graphite load plates according to claim 1, which is characterized in that the dispersing agent
It is N for acrylamide, the crosslinking agent, N'- methylene-bisacrylamide, the polymerization triggering agent is ammonium persulfate.
6. the preparation method of double coat of silicon carbide graphite load plates according to claim 1, which is characterized in that the step 2
It is middle to adjust pH value using tetramethylammonium hydroxide.
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| CN201811009486.XA CN109232023A (en) | 2018-08-31 | 2018-08-31 | A kind of preparation method of double coat of silicon carbide graphite load plates |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB2582379B (en) * | 2019-03-22 | 2021-12-08 | Tenmat Ltd | Method of coating carbon components |
| CN115819119A (en) * | 2022-12-26 | 2023-03-21 | 汨罗市福缘新材料有限公司 | Coating forming method of isostatic pressing graphite crucible |
| CN115872750A (en) * | 2021-09-25 | 2023-03-31 | 昊石新材料科技南通有限公司 | Preparation process of thermal shock resistant silicon carbide coating |
Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1184795A (en) * | 1997-09-26 | 1998-06-17 | 清华大学 | Method for preparing non-crack, anti-oxidation silicone carbide coating carbon material |
| CN101792331A (en) * | 2010-01-04 | 2010-08-04 | 北京科技大学 | Microwave preparation method of anti-oxidation coating made of carbon-based material |
| US20120027939A1 (en) * | 2008-11-21 | 2012-02-02 | Cheng Uei Precision Industry Co., Ltd. | Nanocomposite coating and the method of coating thereof |
| CN103483004A (en) * | 2012-06-12 | 2014-01-01 | 上海珩锢新材料科技有限公司 | Silicon carbide coating solution used on graphite surface and spraying technology thereof |
| CN104609896A (en) * | 2015-02-10 | 2015-05-13 | 清华大学 | SiC/SiO2 composite high-temperature oxidation resistant coating prepared from surface of graphite material at reactor and composite material |
| CN105314983A (en) * | 2015-09-29 | 2016-02-10 | 洛阳暖盈电子技术有限公司 | Preparation method of reaction-bonded silicon carbide |
-
2018
- 2018-08-31 CN CN201811009486.XA patent/CN109232023A/en active Pending
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1184795A (en) * | 1997-09-26 | 1998-06-17 | 清华大学 | Method for preparing non-crack, anti-oxidation silicone carbide coating carbon material |
| US20120027939A1 (en) * | 2008-11-21 | 2012-02-02 | Cheng Uei Precision Industry Co., Ltd. | Nanocomposite coating and the method of coating thereof |
| CN101792331A (en) * | 2010-01-04 | 2010-08-04 | 北京科技大学 | Microwave preparation method of anti-oxidation coating made of carbon-based material |
| CN103483004A (en) * | 2012-06-12 | 2014-01-01 | 上海珩锢新材料科技有限公司 | Silicon carbide coating solution used on graphite surface and spraying technology thereof |
| CN104609896A (en) * | 2015-02-10 | 2015-05-13 | 清华大学 | SiC/SiO2 composite high-temperature oxidation resistant coating prepared from surface of graphite material at reactor and composite material |
| CN105314983A (en) * | 2015-09-29 | 2016-02-10 | 洛阳暖盈电子技术有限公司 | Preparation method of reaction-bonded silicon carbide |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB2582379B (en) * | 2019-03-22 | 2021-12-08 | Tenmat Ltd | Method of coating carbon components |
| CN115872750A (en) * | 2021-09-25 | 2023-03-31 | 昊石新材料科技南通有限公司 | Preparation process of thermal shock resistant silicon carbide coating |
| CN115819119A (en) * | 2022-12-26 | 2023-03-21 | 汨罗市福缘新材料有限公司 | Coating forming method of isostatic pressing graphite crucible |
| CN115819119B (en) * | 2022-12-26 | 2023-12-19 | 汨罗市福缘新材料有限公司 | Coating forming method of isostatic pressing graphite crucible |
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Application publication date: 20190118 |