CN114380537A - Silicon carbide light-weight sealing ring and preparation method thereof - Google Patents
Silicon carbide light-weight sealing ring and preparation method thereof Download PDFInfo
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- CN114380537A CN114380537A CN202210087965.3A CN202210087965A CN114380537A CN 114380537 A CN114380537 A CN 114380537A CN 202210087965 A CN202210087965 A CN 202210087965A CN 114380537 A CN114380537 A CN 114380537A
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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
- C04B26/00—Compositions of mortars, concrete or artificial stone, containing only organic binders, e.g. polymer or resin concrete
- C04B26/02—Macromolecular compounds
- C04B26/10—Macromolecular compounds obtained otherwise than by reactions only involving carbon-to-carbon unsaturated bonds
- C04B26/12—Condensation polymers of aldehydes or ketones
- C04B26/122—Phenol-formaldehyde condensation polymers
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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
- C04B14/00—Use of inorganic materials as fillers, e.g. pigments, for mortars, concrete or artificial stone; Treatment of inorganic materials specially adapted to enhance their filling properties in mortars, concrete or artificial stone
- C04B14/02—Granular materials, e.g. microballoons
- C04B14/32—Carbides; Nitrides; Borides ; Silicides
- C04B14/322—Carbides
- C04B14/323—Boron carbide
-
- 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
- C04B14/00—Use of inorganic materials as fillers, e.g. pigments, for mortars, concrete or artificial stone; Treatment of inorganic materials specially adapted to enhance their filling properties in mortars, concrete or artificial stone
- C04B14/02—Granular materials, e.g. microballoons
- C04B14/32—Carbides; Nitrides; Borides ; Silicides
- C04B14/322—Carbides
- C04B14/324—Silicon carbide
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16J—PISTONS; CYLINDERS; SEALINGS
- F16J15/00—Sealings
- F16J15/16—Sealings between relatively-moving surfaces
- F16J15/34—Sealings between relatively-moving surfaces with slip-ring pressed against a more or less radial face on one member
- F16J15/3496—Sealings between relatively-moving surfaces with slip-ring pressed against a more or less radial face on one member use of special materials
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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
- C04B2111/00—Mortars, concrete or artificial stone or mixtures to prepare them, characterised by specific function, property or use
- C04B2111/20—Resistance against chemical, physical or biological attack
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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
- C04B2111/00—Mortars, concrete or artificial stone or mixtures to prepare them, characterised by specific function, property or use
- C04B2111/20—Resistance against chemical, physical or biological attack
- C04B2111/2038—Resistance against physical degradation
-
- 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
- C04B2111/00—Mortars, concrete or artificial stone or mixtures to prepare them, characterised by specific function, property or use
- C04B2111/40—Porous or lightweight materials
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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
- C04B2201/00—Mortars, concrete or artificial stone characterised by specific physical values
- C04B2201/20—Mortars, concrete or artificial stone characterised by specific physical values for the density
-
- 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
- C04B2201/00—Mortars, concrete or artificial stone characterised by specific physical values
- C04B2201/50—Mortars, concrete or artificial stone characterised by specific physical values for the mechanical strength
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- Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Ceramic Engineering (AREA)
- Materials Engineering (AREA)
- Structural Engineering (AREA)
- Organic Chemistry (AREA)
- Civil Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Mechanical Engineering (AREA)
- Ceramic Products (AREA)
Abstract
The invention discloses a silicon carbide light-weight sealing ring which comprises the following raw materials in parts by weight: 50-70 parts of silicon carbide, 30-40 parts of boron carbide, 1-5 parts of zirconia, 8-12 parts of phenolic resin, 3-8 parts of binder, 0.8-1.2 parts of dispersant, 1-3 parts of glycerol and 3-8 parts of carbon black. The invention has the beneficial effects that: according to the invention, boron carbide and zirconia are added in the preparation process of the silicon carbide light-weight sealing ring, so that the sealing ring has lower volume density, lighter working mass with the same volume, and better heat conductivity coefficient, hardness, bending strength and reliability; the light-weight silicon carbide sealing ring disclosed by the invention adopts a pressureless sintering process, so that the light-weight silicon carbide sealing ring can be produced in large batch, and the production cost is reduced.
Description
Technical Field
The invention belongs to the technical field of sealing materials, and particularly relates to a silicon carbide light-weight sealing ring and a preparation method thereof.
Background
The sealing ring of the mechanical seal is a core component of the mechanical seal and is divided into a dynamic sealing ring and a static sealing ring, and under the action of axial force, the dynamic sealing ring is contacted with the end face of the static sealing ring to form end face seal.
The existing sealing ring is mostly made of single silicon carbide, the silicon carbide sealing ring has high density and heavy weight, and the resistance of equipment is higher in the high-speed operation process, so that the service life of the equipment and products is shortened, the weight of the used bulletproof sheet material is increased, and the flexibility is poor.
Disclosure of Invention
The invention aims to provide a light-weight silicon carbide sealing ring which is light in weight and good in sealing performance.
In order to achieve the purpose, the invention adopts the following technical scheme:
a silicon carbide light-weight sealing ring comprises the following raw materials in parts by weight: 50-70 parts of silicon carbide, 30-40 parts of boron carbide, 1-5 parts of zirconia, 8-12 parts of phenolic resin, 3-8 parts of binder, 0.8-1.2 parts of dispersant, 1-3 parts of glycerol and 3-8 parts of carbon black.
The silicon carbide light-weight sealing ring comprises the following raw materials in parts by weight as a preferred embodiment: 60 parts of silicon carbide, 35 parts of boron carbide, 1 part of zirconia, 10 parts of phenolic resin, 5 parts of binder, 1 part of dispersant, 2 parts of glycerol and 5 parts of carbon black.
Silicon carbide is an inorganic substance and is prepared by smelting quartz sand, petroleum coke, wood dust and other raw materials in a resistance furnace at high temperature. The chemical property is stable, the heat conductivity coefficient is high, the thermal expansion coefficient is small, the wear resistance is good, besides being used as an abrasive, the material can also be made into a high-grade refractory material, and has the advantages of thermal shock resistance, small volume, light weight, high strength and good energy-saving effect.
Boron carbide is an inorganic substance and has the characteristics of low density, high strength, high-temperature stability and good chemical stability. The composite material is used in wear-resistant materials and ceramic reinforced phases, particularly light armors, reactor neutron absorbers and the like. The diamond cutting fluid can replace expensive diamond in some places and is often applied to grinding, drilling and the like.
Zirconia generally refers to zirconium dioxide, which is generally a white odorless and tasteless crystal. Has the properties of high melting point, high resistivity, high refractive index and low thermal expansion coefficient, is an important high-temperature resistant material, a ceramic insulating material and a ceramic opacifier, and is also a main raw material of the artificial drill. The zirconia fiber has higher use temperature than other refractory fiber varieties such as alumina fiber, mullite fiber, alumina silicate fiber and the like, has stable high-temperature chemical property, is corrosion-resistant, oxidation-resistant, thermal shock-resistant, non-volatile and pollution-free, and is the most top refractory fiber material in the world at present.
The phenolic resin is colorless or yellow brown transparent, has good acid resistance, mechanical property and heat resistance, and is widely applied to corrosion-resistant engineering, adhesives and flame-retardant materials. The most important feature is high temperature resistance, which maintains its structural integrity and dimensional stability even at very high temperatures.
In the above light-weight silicon carbide sealing ring, as a preferred embodiment, the phenolic resin is ksp-8022 phenolic resin, the binder is polyvinyl alcohol, and the dispersant is BYK-190 dispersant. Polyvinyl alcohol was purchased from Fushan pottery Takk chemical Co.
In a second aspect of the present application, a method for preparing a silicon carbide lightweight seal ring is provided, which includes the following steps:
(1) adding carbon black and a dispersant into water, and uniformly mixing and stirring to obtain a mixture a;
(2) adding silicon carbide, boron carbide and zirconia into the mixture a, and uniformly mixing and stirring to obtain a mixture b;
(3) and (3) sequentially adding the binder and the glycerol into the mixture b, uniformly mixing and stirring, adding the phenolic resin, uniformly mixing and stirring, and performing ball milling, filtering, drying granulation and dry pressing molding to obtain the silicon carbide light-weight sealing ring.
In the above method for manufacturing a silicon carbide light-weight seal ring, as a preferred embodiment, in the step (1), the amount of water is equal to the total amount of the raw materials of the silicon carbide light-weight seal ring.
In the above method for manufacturing a silicon carbide lightweight seal ring, as a preferred embodiment, in the step (3), the filtering is performed by using a 300-mesh screen.
In the above method for manufacturing a lightweight silicon carbide seal ring, as a preferred embodiment, in the step (3), the drying is spray drying, and the spray drying is drying by using a centrifugal spray drying device.
In the above method for producing a silicon carbide light-weight seal ring, as a preferred embodiment, in the step (3), the density of the silicon carbide light-weight seal ring is 2.5 to 2.7g/cm3。
The invention has the beneficial effects that:
1. according to the invention, boron carbide and zirconia are added in the preparation process of the silicon carbide light-weight sealing ring, so that the sealing ring has lower volume density, lighter working mass with the same volume, and better heat conductivity coefficient, hardness, bending strength and reliability.
2. The light-weight silicon carbide sealing ring disclosed by the invention adopts a pressureless sintering process, so that the light-weight silicon carbide sealing ring can be produced in large batch, and the production cost is reduced.
3. The silicon carbide light-weight sealing ring can completely replace a hard alloy sealing ring made of rare metals such as tungsten, cobalt and nickel, can be applied to a strong corrosion working condition and a high PV value working condition, saves a large amount of national strategic materials, and has great social benefit.
4. The application field of the silicon carbide light-weight sealing ring is not only mechanical sealing, but also can be made into important heat-resistant and wear-resistant mechanical parts such as heat dissipation substrates, shaft sleeves, bearing bushes, bearings, nozzles and the like.
Detailed Description
In order to make the objects, technical solutions and advantages of the present invention more apparent, the technical solutions of the present invention will be described in detail below. It is to be understood that the described embodiments are merely a few embodiments of the invention, and not all embodiments. All other embodiments, which can be derived by a person skilled in the art from the examples given herein without any inventive step, are within the scope of the present invention.
Example 1
A silicon carbide light-weight sealing ring comprises the following raw materials in parts by weight: 50 parts of silicon carbide, 30 parts of boron carbide, 1 part of zirconia, 8 parts of phenolic resin, 3 parts of binder, 0.8 part of dispersant, 1 part of glycerol and 3 parts of carbon black;
the phenolic resin is ksp-8022 phenolic resin, the binder is polyvinyl alcohol, and the dispersant is BYK-190 dispersant.
The method for preparing a lightweight silicon carbide seal ring of example 1, comprising the steps of:
(1) adding carbon black and a dispersant into water, and uniformly mixing and stirring to obtain a mixture a; the amount of the water is equal to the total amount of the silicon carbide light-weight type sealing ring raw material;
(2) adding silicon carbide, boron carbide and zirconia into the mixture a, and uniformly mixing and stirring to obtain a mixture b;
(3) sequentially adding the binder and the glycerol into the mixture b, mixing and stirring uniformly, adding the phenolic resin, mixing and stirring uniformly, performing ball milling, filtering by adopting a 300-mesh screen, drying and granulating by adopting centrifugal spray drying equipment, and performing dry pressing forming to obtain the product with the density of 2.5g/cm3The silicon carbide lightweight seal ring.
Example 2
A silicon carbide light-weight sealing ring comprises the following raw materials in parts by weight: 60 parts of silicon carbide, 35 parts of boron carbide, 1 part of zirconia, 10 parts of phenolic resin, 5 parts of binder, 1 part of dispersant, 2 parts of glycerol and 5 parts of carbon black;
the phenolic resin is ksp-8022 phenolic resin, the binder is polyvinyl alcohol, and the dispersant is BYK-190 dispersant.
The method for preparing the silicon carbide light-weight sealing ring in the embodiment 2 comprises the following steps:
(1) adding carbon black and a dispersant into water, and uniformly mixing and stirring to obtain a mixture a; the amount of the water is equal to the total amount of the silicon carbide light-weight type sealing ring raw material;
(2) adding silicon carbide, boron carbide and zirconia into the mixture a, and uniformly mixing and stirring to obtain a mixture b;
(3) sequentially adding the binder and the glycerol into the mixture b, mixing and stirring uniformly, adding the phenolic resin, mixing and stirring uniformly, performing ball milling, filtering by adopting a 300-mesh screen, drying and granulating by adopting centrifugal spray drying equipment, and performing dry pressing forming to obtain the product with the density of 2.6g/cm3The silicon carbide lightweight seal ring.
Example 3
A silicon carbide light-weight sealing ring comprises the following raw materials in parts by weight: 70 parts of silicon carbide, 40 parts of boron carbide, 5 parts of zirconia, 12 parts of phenolic resin, 8 parts of binder, 1.2 parts of dispersant, 3 parts of glycerol and 8 parts of carbon black;
the phenolic resin is ksp-8022 phenolic resin, the binder is polyvinyl alcohol, and the dispersant is BYK-190 dispersant.
The method for preparing the light-weight silicon carbide sealing ring of embodiment 3 comprises the following steps:
(1) adding carbon black and a dispersant into water, and uniformly mixing and stirring to obtain a mixture a; the amount of the water is equal to the total amount of the silicon carbide light-weight type sealing ring raw material;
(2) adding silicon carbide, boron carbide and zirconia into the mixture a, and uniformly mixing and stirring to obtain a mixture b;
(3) sequentially adding the binder and the glycerol into the mixture b, mixing and stirring uniformly, adding the phenolic resin, mixing and stirring uniformly, performing ball milling, filtering by adopting a 300-mesh screen, drying and granulating by adopting centrifugal spray drying equipment, and performing dry pressing forming to obtain the product with the density of 2.7g/cm3The silicon carbide lightweight seal ring.
Comparative example 1
The silicon carbide light-weight seal ring of comparative example 1 differs from the silicon carbide light-weight seal ring of example 1 in that: the silicon carbide light-weight seal ring described in comparative example 1 contained no raw material boron carbide.
Comparative example 2
The silicon carbide light-weight seal ring of comparative example 2 differs from the silicon carbide light-weight seal ring of example 2 in that: the silicon carbide light-weight seal ring described in comparative example 2 did not contain raw material zirconia.
The performance research of the silicon carbide light-weight sealing ring provided by the invention comprises the following steps:
the test equipment is as follows: INSTRON-2100B Vickers hardness tester, test Standard: GB/T16534-:
TABLE 1
| Fracture toughness (MPa. m)1/2) | Density (g/cc) | |
| Example 1 | 4.0 | 2.65 |
| Example 2 | 4.2 | 2.6 |
| Example 3 | 4.15 | 2.5 |
| Comparative example 1 | 2.65 | 2.47 |
| Comparative example 2 | 3.3 | 2.6 |
The above description is only a preferred embodiment of the present application and is not intended to limit the present application, and various modifications and changes may be made by those skilled in the art. Any modification, equivalent replacement, improvement and the like made within the spirit and principle of the present application shall be included in the protection scope of the present application.
Claims (8)
1. A silicon carbide light-weight sealing ring is characterized by comprising the following raw materials in parts by weight: 50-70 parts of silicon carbide, 30-40 parts of boron carbide, 1-5 parts of zirconia, 8-12 parts of phenolic resin, 3-8 parts of binder, 0.8-1.2 parts of dispersant, 1-3 parts of glycerol and 3-8 parts of carbon black.
2. The silicon carbide light-weight sealing ring according to claim 1, comprising the following raw materials in parts by weight: 60 parts of silicon carbide, 35 parts of boron carbide, 1 part of zirconia, 10 parts of phenolic resin, 5 parts of binder, 1 part of dispersant, 2 parts of glycerol and 5 parts of carbon black.
3. The silicon carbide light-weight seal ring of claim 1, wherein the phenolic resin is ksp-8022 phenolic resin, the binder is polyvinyl alcohol, and the dispersant is a BYK-190 dispersant.
4. A method of making a silicon carbide light weight seal ring according to any one of claims 1 to 3, comprising the steps of:
(1) adding carbon black and a dispersant into water, and uniformly mixing and stirring to obtain a mixture a;
(2) adding silicon carbide, boron carbide and zirconia into the mixture a, and uniformly mixing and stirring to obtain a mixture b;
(3) and (3) sequentially adding the binder and the glycerol into the mixture b, uniformly mixing and stirring, adding the phenolic resin, uniformly mixing and stirring, and performing ball milling, filtering, drying granulation and dry pressing molding to obtain the silicon carbide light-weight sealing ring.
5. The method for preparing a silicon carbide light-weight sealing ring according to claim 4, wherein in the step (1), the amount of water is equal to the total amount of the raw materials of the silicon carbide light-weight sealing ring.
6. The method for preparing the silicon carbide light-weight sealing ring according to claim 4, wherein in the step (3), the filtering is performed by using a 300-mesh screen.
7. The method for preparing the silicon carbide light-weight sealing ring according to claim 4, wherein in the step (3), the drying is spray drying, and the spray drying is drying by using a centrifugal spray drying device.
8. The method for preparing a silicon carbide light-weight sealing ring according to claim 4, wherein in the step (3), the density of the silicon carbide light-weight sealing ring is 2.5-2.7g/cm3。
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| Application Number | Priority Date | Filing Date | Title |
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| CN202210087965.3A CN114380537A (en) | 2022-01-25 | 2022-01-25 | Silicon carbide light-weight sealing ring and preparation method thereof |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN115073178A (en) * | 2022-06-01 | 2022-09-20 | 山东百川智能科技有限公司 | Pressureless sintering silicon carbide collection port with high thermal shock resistance and processing method thereof |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101169188A (en) * | 2007-12-04 | 2008-04-30 | 上海德宝密封件有限公司 | Silicon carbide ceramic seal ring |
| CN103641482A (en) * | 2013-10-25 | 2014-03-19 | 宁夏机械研究院（有限责任公司） | Preparation method for self-lubricating silicon carbide ceramic sealing material |
| CN104072143A (en) * | 2014-07-16 | 2014-10-01 | 苏州立瓷电子技术有限公司 | High-thermal-conductivity silicon carbide ceramic material and preparation method thereof |
| CN112341202A (en) * | 2020-10-27 | 2021-02-09 | 上海德宝密封件有限公司 | Granulation powder for improving performance of reaction sintered silicon carbide and preparation method thereof |
-
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- 2022-01-25 CN CN202210087965.3A patent/CN114380537A/en active Pending
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101169188A (en) * | 2007-12-04 | 2008-04-30 | 上海德宝密封件有限公司 | Silicon carbide ceramic seal ring |
| CN103641482A (en) * | 2013-10-25 | 2014-03-19 | 宁夏机械研究院（有限责任公司） | Preparation method for self-lubricating silicon carbide ceramic sealing material |
| CN104072143A (en) * | 2014-07-16 | 2014-10-01 | 苏州立瓷电子技术有限公司 | High-thermal-conductivity silicon carbide ceramic material and preparation method thereof |
| CN112341202A (en) * | 2020-10-27 | 2021-02-09 | 上海德宝密封件有限公司 | Granulation powder for improving performance of reaction sintered silicon carbide and preparation method thereof |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN115073178A (en) * | 2022-06-01 | 2022-09-20 | 山东百川智能科技有限公司 | Pressureless sintering silicon carbide collection port with high thermal shock resistance and processing method thereof |
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