A silicon carbide modified material and process

Abstract

The present invention is applicable to the technical field of silicon carbide modification, and provides a silicon carbide modification material and process, which include the following components: silicon carbide, carbon nanotubes, coupling agent, metal phthalocyanine, rare earth oxide, alumina, carbon black; preferably, by mass fraction, the contents of each component are as follows: 22.6 - 35.8 parts of silicon carbide, 8.5 - 15 parts of carbon nanotubes, 2.2 - 3.9 parts of coupling agent, 4.5 - 7.5 parts of metal phthalocyanine, 2 - 4 parts of rare earth oxide, 1.2 - 2.6 parts of alumina, 3 - 8 parts of carbon black; preferably, the metal phthalocyanine is one or more of iron tetranitro phthalocyanine, cobalt tetranitro phthalocyanine and zinc tetranitro phthalocyanine. The present invention uses silicon carbide, carbon nanotubes, coupling agent, metal phthalocyanine, rare earth oxide, alumina, carbon black as components to prepare a silicon carbide modification material according to a specific process. The plasticity and elasticity of the obtained product are greatly improved, and the application range of the silicon carbide material is increased.

Description

Technical Field

[0001] The present invention relates to the technical field of silicon carbide modification, and specifically to a silicon carbide modified material and process. Background Art

[0002] Silicon carbide (SiC) is a compound composed of carbon and silicon elements. Silicon carbide has an extremely high melting point and a low coefficient of thermal expansion, enabling it to maintain structural stability under high-temperature conditions. Therefore, silicon carbide is often used in high-temperature materials such as stoves, furnace linings, refractory materials, etc.; silicon carbide is a very hard material, second only to diamond, and its hardness gives it excellent wear resistance, and it is commonly used in the manufacture of abrasives, grinding tools, abrasive ceramics, etc.; silicon carbide has a very high thermal conductivity, much higher than most metals and other ceramic materials, which makes silicon carbide widely used in heat sinks, high-power electronic devices, thermal management systems, etc.; silicon carbide has excellent electrical properties and can be used as a semiconductor material. It has a low conduction loss under high-temperature and high-voltage environments, so it is widely used in power electronic devices, power converters, solar cells and other fields; silicon carbide has good corrosion resistance to chemical substances such as acids and alkalis and can be stably used in acid-base corrosion environments, which makes silicon carbide applicable in chemical equipment, anticorrosive coatings, etc.

[0003] In summary, due to its unique properties, silicon carbide has excellent performance in high temperature, high hardness, high thermal conductivity, corrosion resistance, etc., and thus has a wide range of applications in many fields.

[0004] Most of the existing silicon carbide materials have poor plasticity and elasticity, which limits their use. Summary of the Invention

[0005] The purpose of the present invention is to provide a silicon carbide modified material and process to solve the problem that most of the existing silicon carbide materials have poor plasticity and elasticity, which limits their use.

[0006] To achieve the above purpose, the present invention provides the following technical solutions: In the first aspect of the present invention, a silicon carbide modified material is provided, which includes the following components:

[0007] Silicon carbide, carbon nanotubes, coupling agent, metal phthalocyanine, rare earth oxide, alumina, carbon black.

[0008] Preferably, in terms of mass parts, the contents of each component are as follows:

[0009] 22.6 - 35.8 parts of silicon carbide, 8.5 - 15 parts of carbon nanotubes, 2.2 - 3.9 parts of coupling agent, 4.5 - 7.5 parts of metal phthalocyanine, 2 - 4 parts of rare earth oxide, 1.2 - 2.6 parts of alumina, 3 - 8 parts of carbon black.

[0010] Preferably, in parts by mass, the contents of the respective components are as follows:

[0011] 25 - 32 parts of silicon carbide, 11 - 14 parts of carbon nanotubes, 2.5 - 3.2 parts of coupling agent, 5 - 6 parts of metal phthalocyanine, 3 - 3.5 parts of rare earth oxide, 1.6 - 2.2 parts of alumina, and 5 - 6 parts of carbon black.

[0012] Preferably, the metal phthalocyanine is one or more of iron tetranitrophthalocyanine, cobalt tetranitrophthalocyanine, and zinc tetranitrophthalocyanine.

[0013] Preferably, the coupling agent is a silane coupling agent or a titanate coupling agent.

[0014] Preferably, the rare earth oxide is one or more of lanthanum oxide, cerium oxide, and yttrium oxide.

[0015] In a second aspect of the present invention, a process for a silicon carbide modified material according to the first aspect of the present invention is provided. The process includes the following steps:

[0016] Dry the silicon carbide at a temperature of 100 - 120 °C for 0.5 - 1 h, then add carbon nanotubes, coupling agent, metal phthalocyanine, rare earth oxide, alumina, and carbon black, mix at high speed for 15 min - 30 min, then transfer to the compression cavity of the mold, cold press into shape, with a pressure of 60 - 70 MPa and a pressure holding time of 3 - 8 min, demold, and process into shape.

[0017] The present invention has at least the following beneficial effects:

[0018] A silicon carbide modified material and process provided by the present invention use silicon carbide, carbon nanotubes, coupling agent, metal phthalocyanine, rare earth oxide, alumina, and carbon black as components to prepare a silicon carbide modified material according to a specific process. The plasticity and elasticity of the obtained product are both greatly improved, expanding the application range of the silicon carbide material. Detailed Embodiments

[0019] The technical solutions in the embodiments of the present invention will be clearly and completely described below. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all of the embodiments. All other embodiments obtained by those of ordinary skill in the art based on the embodiments of the present invention without creative efforts shall fall within the protection scope of the present invention.

[0020] Example 1

[0021] A silicon carbide modified material includes the following components:

[0022] Silicon carbide, carbon nanotubes, coupling agent, metal phthalocyanine, rare earth oxide, alumina, and carbon black.

[0023] The contents of each component are as follows by mass parts:

[0024] 22.6 parts of silicon carbide, 8.5 parts of carbon nanotubes, 2.2 parts of coupling agent, 4.5 parts of metal phthalocyanine, 2 parts of rare earth oxide, 1.2 parts of alumina, and 3 parts of carbon black.

[0025] Among them, the metal phthalocyanine is iron tetranitro phthalocyanine; the coupling agent is a silane coupling agent; the rare earth oxide is lanthanum oxide.

[0026] The process of the above silicon carbide modified material includes the following steps:

[0027] Dry the silicon carbide at 100 °C for 0.5 h, then add carbon nanotubes, coupling agent, metal phthalocyanine, rare earth oxide, alumina, and carbon black, mix at high speed for 15 min, then transfer to the compression cavity of the mold, cold press into shape, the pressure is 60 MPa, the pressure holding time is 3 min, demold, and process into shape.

[0028] Example 2

[0029] A silicon carbide modified material, including the following components:

[0030] Silicon carbide, carbon nanotubes, coupling agent, metal phthalocyanine, rare earth oxide, alumina, and carbon black.

[0031] The contents of each component are as follows by mass parts:

[0032] 25 parts of silicon carbide, 11 parts of carbon nanotubes, 2.5 parts of coupling agent, 5 parts of metal phthalocyanine, 3 parts of rare earth oxide, 1.6 parts of alumina, and 5 parts of carbon black.

[0033] Among them, the metal phthalocyanine is cobalt tetranitro phthalocyanine; the coupling agent is a titanate coupling agent; the rare earth oxide is cerium oxide.

[0034] The process of the above silicon carbide modified material includes the following steps:

[0035] Dry the silicon carbide at 110 °C for 0.75 h, then add carbon nanotubes, coupling agent, metal phthalocyanine, rare earth oxide, alumina, and carbon black, mix at high speed for 20 min, then transfer to the compression cavity of the mold, cold press into shape, the pressure is 65 MPa, the pressure holding time is 5 min, demold, and process into shape.

[0036] Example 3

[0037] A silicon carbide modified material, including the following components:

[0038] Silicon carbide, carbon nanotubes, coupling agent, metal phthalocyanine, rare earth oxide, alumina, and carbon black.

[0039] The contents of each component are as follows by mass parts:

[0040] 32 parts of silicon carbide, 14 parts of carbon nanotubes, 3.2 parts of coupling agent, 6 parts of metal phthalocyanine, 3.5 parts of rare earth oxide, 2.2 parts of alumina, 6 parts of carbon black.

[0041] Among them, the metal phthalocyanine is zinc tetra-nitrophthalocyanine; the coupling agent is a titanate coupling agent; the rare earth oxide is yttrium oxide.

[0042] The process of the above silicon carbide modified material includes the following steps:

[0043] Dry the silicon carbide at 120 °C for 1 h, then add carbon nanotubes, coupling agent, metal phthalocyanine, rare earth oxide, alumina, carbon black, mix at high speed for 30 min, then transfer to the mold compression cavity, cold press into shape, the pressure is 70 MPa, the pressure holding time is 8 min, demold, and process into shape.

[0044] Example 4

[0045] A silicon carbide modified material, comprising the following components:

[0046] Silicon carbide, carbon nanotubes, coupling agent, metal phthalocyanine, rare earth oxide, alumina, carbon black.

[0047] In terms of mass parts, the content of each component is as follows:

[0048] 35.8 parts of silicon carbide, 15 parts of carbon nanotubes, 3.9 parts of coupling agent, 7.5 parts of metal phthalocyanine, 4 parts of rare earth oxide, 2.6 parts of alumina, 8 parts of carbon black.

[0049] Among them, the metal phthalocyanine is zinc tetra-nitrophthalocyanine; the coupling agent is a silane coupling agent; the rare earth oxide is lanthanum oxide.

[0050] The process of the above silicon carbide modified material includes the following steps:

[0051] Dry the silicon carbide at 100 °C for 0.75 h, then add carbon nanotubes, coupling agent, metal phthalocyanine, rare earth oxide, alumina, carbon black, mix at high speed for 30 min, then transfer to the mold compression cavity, cold press into shape, the pressure is 60 MPa, the pressure holding time is 8 min, demold, and process into shape.

[0052] Compare the products obtained in Examples 1-4 with silicon carbide for relevant properties respectively, and the results are shown in the following table:

[0053]

[0054] In summary, the plasticity and elasticity of the products obtained by the present invention are both greatly improved, and the application range of the silicon carbide material is expanded.

[0055] The basic principles, main features and advantages of the present invention have been shown and described above. For those skilled in the art, it is obvious that the present invention is not limited to the details of the above-mentioned exemplary embodiments, and without departing from the spirit or basic features of the present invention, the present invention can be implemented in other specific forms. Therefore, from any point of view, the embodiments should be regarded as exemplary and non-limiting. The scope of the present invention is defined by the appended claims rather than the above description. Therefore, all changes falling within the meaning and scope of the equivalent elements of the claims are intended to be embraced within the present invention.

[0056] Although the embodiments of the present invention have been shown and described, for those of ordinary skill in the art, it can be understood that various changes, modifications, substitutions and variations can be made to these embodiments without departing from the principles and spirit of the present invention. The scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A silicon carbide modified material, characterized in that: It includes the following components: Silicon carbide, carbon nanotubes, coupling agents, metal phthalocyanines, rare earth oxides, alumina, carbon black; The contents of each component in parts by mass are as follows: 22.6-35.8 parts of silicon carbide, 8.5-15 parts of carbon nanotubes, 2.2-3.9 parts of coupling agent, 4.5-7.5 parts of metal phthalocyanine, 2-4 parts of rare earth oxide, 1.2-2.6 parts of aluminum oxide, 3-8 parts of carbon black; The metal phthalocyanine is one or more of tetranitrophthalocyanine iron, tetranitrophthalocyanine cobalt and tetranitrophthalocyanine zinc.

2. A silicon carbide modified material according to claim 1, characterized in that: The contents of each component in parts by mass are as follows: 25-32 parts of silicon carbide, 11-14 parts of carbon nanotubes, 2.5-3.2 parts of coupling agent, 5-6 parts of metal phthalocyanine, 3-3.5 parts of rare earth oxide, 1.6-2.2 parts of aluminum oxide, and 5-6 parts of carbon black.

3. A silicon carbide modified material according to claim 1, characterized in that: The coupling agent is a silane coupling agent or a titanate coupling agent.

4. The silicon carbide modified material according to claim 1, characterized in that: The rare earth oxide is one or more of lanthanum oxide, cerium oxide and yttrium oxide.

5. A process for modifying silicon carbide materials according to any one of claims 1 to 4, characterized in that: The process comprises the following steps: The silicon carbide is dried at 100-120°C for 0.5-1h, and then carbon nanotubes, coupling agent, metal phthalocyanine, rare earth oxide, alumina and carbon black are added and mixed at high speed for 15-30min. Then the silicon carbide is transferred to the compression cavity of the mold and cold-pressed at a pressure of 60-70MPa for 3-8min. The mold is demolded and formed.

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