High-thermal-conductivity wear-resistant material and application thereof in circulating fluidized bed boiler

Abstract

The invention relates to the field of circulating fluidized bed boilers, in particular to a high-thermal-conductivity wear-resistant material and application thereof in a circulating fluidized bed boiler, and aims to solve the problems that the existing high-thermal-conductivity wear-resistant material for the circulating fluidized bed boiler is poor in thermal conductivity, mechanical property and wear resistance, so that the operation reliability of the boiler is seriously influenced; and the service life of the boiler is shortened. According to the high-thermal-conductivity wear-resistant material, various raw materials are reasonably compounded and endowed with excellent mechanical properties, after polyethyleneimine modified carbon fibers and epoxy molybdenum-containing phenolic resin are added into the high-thermal-conductivity wear-resistant material, the mechanical properties, thermal conductivity and wear resistance of the material can be remarkably improved, the problems of falling, fragmentation and wear of the high-thermal-conductivity wear-resistant material are reduced, and the service life of the high-thermal-conductivity wear-resistant material is prolonged. Therefore, the circulating fluidized bed boiler can stably operate under the working conditions of high temperature and high abrasion, the heat transfer efficiency is improved, the service life of the circulating fluidized bed boiler can be effectively prolonged, and the maintenance cost of equipment is greatly reduced.

Description

Technical Field

[0001] The present invention relates to the field of circulating fluidized bed boilers, and in particular to a high-heat-conductivity wear-resistant material and an application thereof in circulating fluidized bed boilers. Background Art

[0002] Circulating fluidized bed boilers (CFBs) are widely used in the energy sector due to their high combustion efficiency, excellent pollutant control capabilities, and adaptability to low-quality fuels. However, during CFB operation, the high temperatures within the furnace and the large number of high-speed moving solid particles (such as coal particles, desulfurizers, and ash) can cause severe wear and thermal damage to internal boiler components. Traditional boiler lining materials, such as ordinary refractory bricks and conventional wear-resistant castables, have poor thermal conductivity, making it difficult to quickly conduct and dissipate heat. This leads to localized overheating of components and reduced material strength. Furthermore, their mechanical properties and wear resistance are insufficient, making them susceptible to shedding, cracking, and wear under the impact of high-speed particles. This can easily lead to poor fluidization within the furnace, even coking, blockage of the return system, and wear and tear of the heating surfaces, resulting in pipe bursts. This affects boiler reliability, shortens boiler service life, and increases maintenance costs and downtime. Therefore, it is of great significance to develop a high thermal conductivity and wear-resistant material and its application in circulating fluidized bed boilers. Summary of the Invention

[0003] In order to overcome the above-mentioned technical problems, the purpose of the present invention is to provide a high thermal conductivity and wear-resistant material and its application in circulating fluidized bed boilers, which solves the problem that the existing high thermal conductivity and wear-resistant materials used in circulating fluidized bed boilers have poor thermal conductivity, mechanical properties and wear resistance, which seriously affects the reliability of boiler operation and shortens the service life of the boiler.

[0004] The purpose of the present invention can be achieved through the following technical solutions: A high thermal conductivity and wear-resistant material, comprising the following components in parts by weight: 60-65 parts of plate-shaped corundum, 18-22 parts of titanium carbide, 10-16 parts of activated alumina, 3-9 parts of polyethyleneimine-modified carbon fibers, 3.5-5.5 parts of silicon powder, 1-5 parts of hexagonal boron nitride, 2-4 parts of silicon carbide, 1.6-3.2 parts of aluminum powder, 1.1-1.7 parts of yttrium oxide, 1-1.5 parts of magnesium oxide, 180-200 parts of anhydrous ethanol, 2.3-9.3 parts of epoxy-based molybdenum-containing phenolic resin, and 9-33 parts of ethylene glycol.

[0005] As a further solution of the present invention: the high thermal conductivity and wear-resistant material is prepared by the following steps: Step 1: Add plate-shaped corundum, titanium carbide, activated alumina, polyethyleneimine-modified carbon fiber, silicon powder, hexagonal boron nitride, silicon carbide, aluminum powder, yttrium oxide, magnesium oxide and anhydrous ethanol into a ball mill, and mill for 4-10 hours at a ball mill speed of 300-400 r / min and a ball-to-material ratio of 2-3:1. Then, place the ball mill in a vacuum drying oven and dry it at a temperature of 60-65°C for 8-10 hours to obtain a ball mill material; Step 2: Add epoxy molybdenum-containing phenolic resin and ethylene glycol to a mixer, stir and mix for 20-30 minutes at a temperature of 25-30°C and a stirring rate of 300-400 r / min, then add the ball mill and continue stirring and mixing for 2-3 hours, then pour into a mold, and press mold under a pressure of 150-200 MPa to form a green body; Step 3: Place the green body in a vacuum drying oven and dry it at a temperature of 100-110°C for 20-30 hours. Then place it in a box-type atmosphere furnace, introduce nitrogen protection, sinter it at a temperature of 1300-1400°C for 2-3 hours, and then cool it with the furnace to obtain a high thermal conductivity and wear-resistant material.

[0006] As a further solution of the present invention: the average particle size of the plate-shaped corundum is 0.5 mm.

[0007] As a further solution of the present invention: the average particle size of the titanium carbide is 44 μm.

[0008] As a further solution of the present invention: the average particle size of the activated alumina is 52 μm.

[0009] As a further solution of the present invention: the average particle size of the silicon powder is 68 μm.

[0010] As a further solution of the present invention: the average particle size of the hexagonal boron nitride is 80 μm.

[0011] As a further solution of the present invention: the average particle size of the silicon carbide is 78 μm.

[0012] As a further solution of the present invention: the average particle size of the aluminum powder is 60 μm.

[0013] As a further solution of the present invention: the average particle size of the yttrium oxide is 38 μm.

[0014] As a further solution of the present invention: the average particle size of the magnesium oxide is 42 μm.

[0015] As a further solution of the present invention: the polyethyleneimine modified carbon fiber is prepared by the following steps: Step a1: adding carbon fiber and anhydrous acetone to a three-necked flask equipped with a stirrer and a thermometer, ultrasonically treating for 40-60 min at an ultrasonic frequency of 30-40 kHz, and then stirring the reaction at a temperature of 50-55 ° C and a stirring rate of 200-300 r / min for 6-8 h. After the reaction is completed, the reaction product is cooled to room temperature and then centrifuged. The precipitate is then added to hydrogen peroxide and soaked for 10-15 h, and then vacuum filtered. The filter cake is washed with distilled water for 3-5 times, and then placed in a vacuum drying oven and dried at a temperature of 70-75 ° C for 2-3 h to obtain pretreated carbon fiber; Step a2: Add silane coupling agent KH-560, anhydrous ethanol and deionized water to a three-necked flask equipped with a stirrer, a thermometer and an air guide tube, introduce nitrogen protection, and stir the reaction at a temperature of 25-30 ° C and a stirring rate of 200-300 r / min for 20-30 minutes, then adjust the pH to 4-5 with glacial acetic acid, then add pretreated carbon fiber and continue stirring and reacting for 10-15 minutes, then heat to 80-85 ° C and continue stirring and reacting for 5-6 hours. After the reaction is completed, the reaction product is cooled to room temperature and then centrifuged. The precipitate is washed with distilled water 3-5 times, and then placed in a vacuum drying oven and dried at a temperature of 40-45 ° C for 6-8 hours to obtain coupling agent modified carbon fiber; Step a3: Add polyethyleneimine solution and chloroform to a three-necked flask equipped with an agitator, a thermometer and an air guide tube, introduce nitrogen protection, and stir the reaction at a temperature of 25-30°C and a stirring rate of 200-300r / min for 3-5min. Then, add the coupling agent to modify the carbon fiber and continue stirring the reaction at a temperature of 60-65°C for 20-30h. After the reaction is completed, the reaction product is cooled to room temperature and then centrifuged. The precipitate is then washed with anhydrous ethanol for 3-5 times, and then placed in a vacuum drying oven and dried at a temperature of 60-65°C for 2-3h to obtain polyethyleneimine modified carbon fiber.

[0016] As a further solution of the present invention: the usage ratio of the carbon fiber, anhydrous acetone and hydrogen peroxide in step a1 is 1 g: 40-50 mL: 20-30 mL.

[0017] As a further solution of the present invention: the carbon fiber in step a1 is Japan Toray T-300 carbon fiber; the mass fraction of the hydrogen peroxide is 20-22%.

[0018] As a further solution of the present invention: the usage ratio of the silane coupling agent KH-560, anhydrous ethanol, deionized water and pretreated carbon fiber in step a2 is 5g:50-55mL:10-12mL:2.2-5.6g.

[0019] As a further solution of the present invention: the usage ratio of the polyethyleneimine solution, chloroform and coupling agent-modified carbon fiber in step a3 is 8-10 mL: 40-50 mL: 5 g.

[0020] As a further solution of the present invention: the CAS number of the polyethyleneimine solution in step a3 is 9002-98-6, and the mass fraction is 50%.

[0021] As a further solution of the present invention: the epoxy molybdenum-containing phenolic resin is prepared by the following steps: Step b1: adding phenol, sodium hydroxide and formaldehyde solution to a three-necked flask equipped with a stirrer, a thermometer and an air guide tube, stirring and reacting at a temperature of 25-30° C. and a stirring rate of 200-300 r / min for 10-15 minutes, then heating to 70-75° C. and continuing to stir and react for 1-2 hours, then adding molybdic acid and heating to 100-110° C. and continuing to stir and react for 40-60 minutes. After the reaction is completed, the reaction product is cooled to room temperature, and then rotary evaporated to remove the solvent to obtain a molybdenum-containing phenolic resin; Step b2: Add molybdenum-containing phenolic resin, tetrabutylammonium bromide and epichlorohydrin to a three-necked flask equipped with a stirrer, a thermometer, an air guide tube and a constant pressure dropping funnel, introduce nitrogen protection, and stir the reaction for 20-30 minutes at a temperature of 25-30°C and a stirring rate of 200-300r / min. Then, the temperature is raised to 80-85°C and the stirring reaction is continued for 3-4 hours. Then, the temperature is lowered to 50-55°C and sodium hydroxide solution is added dropwise while stirring. The dropwise addition rate is controlled to 1-2 drops / s. After the addition is complete, the stirring reaction is continued for 2-3 hours. Then, anhydrous toluene is added and the temperature is raised to 70-75°C and the stirring reaction is continued for 1-1.5 hours. After the reaction is completed, the reaction product is cooled to room temperature, washed with distilled water 3-5 times, and then rotary evaporated to remove the solvent to obtain an epoxy molybdenum-containing phenolic resin.

[0022] As a further solution of the present invention: the usage ratio of the phenol, sodium hydroxide, formaldehyde solution and molybdic acid in step b1 is 8.4g:0.05-0.09g:8.7-9.5g:1.2-1.6g.

[0023] As a further solution of the present invention: the mass fraction of the formaldehyde solution in step b1 is 37%.

[0024] As a further embodiment of the present invention, the molybdenum-containing phenolic resin, tetrabutylammonium bromide, epichlorohydrin, sodium hydroxide solution and anhydrous toluene in step b2 are used in a ratio of 10 g: 0.2-0.3 g: 70-80 g: 40-50 mL: 60-70 mL.

[0025] As a further solution of the present invention: the mass fraction of the sodium hydroxide solution in step b2 is 30-35%.

[0026] As a further solution of the present invention: the application of the refractory material in the anti-wear layer of the dense phase zone and transition zone of a circulating fluidized bed boiler.

[0027] Beneficial effects of the present invention: The present invention discloses a high thermal conductivity and wear-resistant material and its application in a circulating fluidized bed boiler. The method comprises the following steps: ball-milling plate-shaped corundum, titanium carbide, activated alumina, polyethyleneimine-modified carbon fiber, silicon powder, hexagonal boron nitride, silicon carbide, aluminum powder, yttrium oxide, magnesium oxide and anhydrous ethanol, followed by drying to obtain a ball mill material; stirring and mixing epoxy molybdenum-containing phenolic resin and ethylene glycol; adding the ball mill material and continuing stirring and mixing; pressing and molding to form a green body; drying the green body; and sintering to obtain the high thermal conductivity and wear-resistant material. The high thermal conductivity and wear-resistant material is rationally compounded using multiple raw materials to give it excellent mechanical properties. Adding polyethyleneimine-modified carbon fiber and epoxy molybdenum-containing phenolic resin to the material can significantly improve the mechanical properties, thermal conductivity and wear resistance of the material, reduce the problems of shedding, cracking and wear of the high thermal conductivity and wear-resistant material, thereby enabling the circulating fluidized bed boiler to operate stably under high temperature and high wear conditions, thereby not only improving the heat transfer efficiency but also effectively extending the service life of the circulating fluidized bed boiler, thereby greatly reducing the maintenance cost of the equipment.

[0028] In the process of preparing high thermal conductivity and wear-resistant materials, a polyethyleneimine modified carbon fiber is first prepared, and the carbon fiber is treated with anhydrous acetone to fully remove impurities thereon, and a large number of oxygen-containing groups are introduced under the action of hydrogen peroxide to obtain pretreated carbon fiber, and then the pretreated carbon fiber is treated with silane coupling agent KH-560, and epoxy groups are introduced into its surface to obtain coupling agent modified carbon fiber, and then the coupling agent modified carbon fiber is treated with polyethyleneimine solution. Polyethyleneimine uses its amino group to react with the epoxy group on the coupling agent modified carbon fiber, and introduces a large number of amino groups and imino groups into its surface to obtain polyethyleneimine modified carbon fiber; carbon fiber has extremely high strength and modulus. Adding it to high thermal conductivity and wear-resistant materials can significantly improve its mechanical properties, and can withstand most external forces and disperse stress. , reducing the wear of high thermal conductivity wear-resistant materials, and carbon fiber has excellent thermal conductivity, and can form an effective thermal conductivity network inside the high thermal conductivity wear-resistant material. When heat is transferred inside the high thermal conductivity wear-resistant material, it can quickly diffuse along the thermal conduction channel constructed by the carbon fiber, greatly reducing thermal resistance and significantly improving the thermal conductivity of the high thermal conductivity wear-resistant material. Moreover, after modification, the carbon fiber can avoid its agglomeration and make it evenly distributed inside the high thermal conductivity wear-resistant material. The large number of grafted amino and imino groups can be adsorbed with other components, wrap other particles, and at the same time improve the dispersion of other particles, improve the particle fluidity of each component during the ball milling process, thereby facilitating the expansion of cracks and promoting the refinement of each component, thereby improving the density inside the high thermal conductivity wear-resistant material, and the components are closely connected, which contributes to the comprehensive performance of the high thermal conductivity wear-resistant material.

[0029] In the process of preparing high thermal conductivity and wear-resistant materials, an epoxy-based molybdenum-containing phenolic resin is also prepared. Phenol and formaldehyde are used as raw materials for polymerization to form phenolic resin. Adding molybdenum acid thereto can introduce molybdenum elements into the molecular chain of the phenolic resin to obtain a molybdenum-containing phenolic resin. The molybdenum-containing phenolic resin is then treated with epichlorohydrin to introduce a large number of epoxy groups into the molecular chain of the molybdenum-containing phenolic resin to obtain an epoxy-based molybdenum-containing phenolic resin. Introducing molybdenum elements into the molecular chain of the phenolic resin can introduce a large number of O-Mo-O bonds with large bond energy, which can improve its heat resistance, thereby improving the high-temperature stability and residual carbon rate of the phenolic resin. Introducing a large number of epoxy groups therein can enhance its bonding properties, and can cooperate with polyethyleneimine-modified carbon fibers to react with a large number of amino groups and imino groups thereon to form a strong chemical bond, thereby further improving the internal density of the thermally conductive and wear-resistant material, thereby improving the mechanical properties, thermal conductivity and wear resistance of the thermally conductive and wear-resistant material. DETAILED DESCRIPTION

[0030] The following will be combined with the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the embodiments described are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making any creative efforts shall fall within the scope of protection of the present invention. Example 1

[0031] This embodiment is a method for preparing a high thermal conductivity and wear-resistant material, comprising the following steps: Step S1: 1 g of Japanese Toray T-300 carbon fiber and 40 mL of anhydrous acetone were added to a three-necked flask equipped with a stirrer and a thermometer, and ultrasonically treated for 40 min at an ultrasonic frequency of 30 kHz. The mixture was then stirred at a temperature of 50 ° C and a stirring rate of 200 r / min for 6 h. After the reaction, the reaction product was cooled to room temperature and then centrifuged. The precipitate was then added to 20 mL of 20% hydrogen peroxide and soaked for 10 h. The precipitate was then vacuum filtered, and the filter cake was washed with distilled water 3 times. The filter cake was then placed in a vacuum drying oven and dried at 70 ° C for 2 h to obtain pretreated carbon fiber. Step S2: 5 g of silane coupling agent KH-560, 50 mL of anhydrous ethanol and 10 mL of deionized water were added to a three-necked flask equipped with a stirrer, a thermometer and an air guide tube, and nitrogen was introduced for protection. The mixture was stirred and reacted for 20 minutes at a temperature of 25 ° C and a stirring rate of 200 r / min. Then, the pH was adjusted to 4 with glacial acetic acid, and then 2.2 g of pretreated carbon fiber was added and the stirring reaction was continued for 10 minutes. After that, the temperature was raised to 80 ° C and the stirring reaction was continued for 5 hours. After the reaction was completed, the reaction product was cooled to room temperature and then centrifuged. The precipitate was washed with distilled water 3 times and then placed in a vacuum drying oven and dried at a temperature of 40 ° C for 6 hours to obtain a coupling agent modified carbon fiber; Step S3: 8 mL of a polyethyleneimine solution with a CAS number of 9002-98-6 and a mass fraction of 50% and 40 mL of chloroform were added to a three-necked flask equipped with a stirrer, a thermometer, and an air guide tube, and nitrogen was introduced for protection. The mixture was stirred at a temperature of 25 ° C and a stirring rate of 200 r / min for 3 minutes. After that, 5 g of coupling agent-modified carbon fiber was added and the temperature was raised to 60 ° C. and the stirring reaction was continued for 20 hours. After the reaction was completed, the reaction product was cooled to room temperature and then centrifuged. The precipitate was washed with anhydrous ethanol 3 times and then placed in a vacuum drying oven and dried at a temperature of 60 ° C for 2 hours to obtain polyethyleneimine-modified carbon fiber; Step S4: 8.4 g of phenol, 0.05 g of sodium hydroxide, and 8.7 g of a 37% formaldehyde solution were added to a three-necked flask equipped with a stirrer, a thermometer, and an air guide tube, and stirred for 10 minutes at a temperature of 25° C. and a stirring rate of 200 r / min. The mixture was then heated to 70° C. and stirred for 1 hour. 1.2 g of molybdic acid was then added and the mixture was heated to 100° C. and stirred for 40 minutes. After the reaction, the reaction product was cooled to room temperature, and then the solvent was removed by rotary evaporation to obtain a molybdenum-containing phenolic resin. Step S5: 10g of molybdenum-containing phenolic resin, 0.2g of tetrabutylammonium bromide and 70g of epichlorohydrin are added to a three-necked flask equipped with a stirrer, a thermometer, an air guide tube and a constant pressure dropping funnel, and nitrogen protection is introduced. The mixture is stirred and reacted for 20min at a temperature of 25°C and a stirring rate of 200r / min. The mixture is then heated to 80°C and stirred for 3h. The mixture is then cooled to 50°C and 40mL of a 30% sodium hydroxide solution by mass is added dropwise while stirring. The dropping rate is controlled to 1 drop / s. After the addition is complete, the mixture is stirred and reacted for 2h. 60mL of anhydrous toluene is then added and the mixture is stirred and reacted for 1h under the conditions of heating to 70°C. After the reaction is completed, the reaction product is cooled to room temperature, washed with distilled water 3 times, and then rotary evaporated to remove the solvent to obtain an epoxy molybdenum-containing phenolic resin; Step S6: Weigh 60 parts of plate-shaped corundum, 22 parts of titanium carbide, 10 parts of activated alumina, 3 parts of polyethyleneimine-modified carbon fiber, 3.5 parts of silicon powder, 1 part of hexagonal boron nitride, 2 parts of silicon carbide, 1.6 parts of aluminum powder, 1.1 parts of yttrium oxide, 1 part of magnesium oxide, 180 parts of anhydrous ethanol, 2.3 parts of epoxy-based molybdenum-containing phenolic resin, and 9 parts of ethylene glycol in parts by weight for later use; the average particle size of the plate-shaped corundum is 0.5 mm; the average particle size of the titanium carbide is 44 μm; the average particle size of the activated alumina is 52 μm; the average particle size of the silicon powder is 68 μm; the average particle size of the hexagonal boron nitride is 80 μm; the average particle size of the silicon carbide is 78 μm; the average particle size of the aluminum powder is 60 μm; the average particle size of the yttrium oxide is 38 μm; and the average particle size of the magnesium oxide is 42 μm; Step S7: adding plate-shaped corundum, titanium carbide, activated alumina, polyethyleneimine-modified carbon fiber, silicon powder, hexagonal boron nitride, silicon carbide, aluminum powder, yttrium oxide, magnesium oxide, and anhydrous ethanol to a ball mill, ball milling for 4 h at a ball-to-material ratio of 2:1, and then placing the ball mill in a vacuum drying oven and drying it at 60° C. for 8 h to obtain a ball-milled material; Step S8: adding epoxy molybdenum-containing phenolic resin and ethylene glycol to a mixer, stirring and mixing at a temperature of 25° C. and a stirring rate of 300 r / min for 20 minutes, then adding the ball mill and continuing to stir and mix for 2 hours, then pouring into a mold, and pressing and molding at a pressure of 150 MPa to form a green body; Step S9: Place the green body in a vacuum drying oven and dry it at 100°C for 20 hours. Then place it in a box-type atmosphere furnace, introduce nitrogen protection, sinter it at 1300°C for 2 hours, and then cool it in the furnace to obtain a high thermal conductivity and wear-resistant material. Example 2

[0032] This embodiment is a method for preparing a high thermal conductivity and wear-resistant material, comprising the following steps: Step S1: 1 g of Japanese Toray T-300 carbon fiber and 45 mL of anhydrous acetone were added to a three-necked flask equipped with a stirrer and a thermometer, and ultrasonically treated for 50 min at an ultrasonic frequency of 35 kHz. The mixture was then stirred at a temperature of 52 ° C and a stirring rate of 250 r / min for 7 h. After the reaction, the reaction product was cooled to room temperature and then centrifuged. The precipitate was then added to 25 mL of 21% hydrogen peroxide and soaked for 12 h. The precipitate was then vacuum filtered, and the filter cake was washed with distilled water 4 times. The filter cake was then placed in a vacuum drying oven and dried at 72 ° C for 2.5 h to obtain pretreated carbon fiber. Step S2: 5 g of silane coupling agent KH-560, 52 mL of anhydrous ethanol and 11 mL of deionized water were added to a three-necked flask equipped with a stirrer, a thermometer and an air guide tube, and nitrogen protection was introduced. The mixture was stirred at a temperature of 28 ° C and a stirring rate of 250 r / min for 25 minutes, and then adjusted to a pH of 4.5 with glacial acetic acid. Then, 3.9 g of pretreated carbon fiber was added and the stirring reaction was continued for 12 minutes. The mixture was then heated to 82 ° C and the stirring reaction was continued for 5.5 hours. After the reaction was completed, the reaction product was cooled to room temperature and then centrifuged. The precipitate was washed with distilled water 4 times and then placed in a vacuum drying oven and dried at a temperature of 42 ° C for 7 hours to obtain a coupling agent modified carbon fiber; Step S3: 9 mL of a polyethyleneimine solution with a CAS number of 9002-98-6 and a mass fraction of 50% and 45 mL of chloroform were added to a three-necked flask equipped with a stirrer, a thermometer, and an air guide tube, and nitrogen was introduced for protection. The reaction was stirred at a temperature of 28 ° C and a stirring rate of 250 r / min for 4 minutes. After that, 5 g of coupling agent-modified carbon fiber was added and the temperature was raised to 62 ° C. and the stirring reaction was continued for 25 hours. After the reaction was completed, the reaction product was cooled to room temperature and then centrifuged. The precipitate was washed with anhydrous ethanol 4 times and then placed in a vacuum drying oven and dried at a temperature of 62 ° C for 2.5 hours to obtain polyethyleneimine-modified carbon fiber; Step S4: 8.4 g of phenol, 0.07 g of sodium hydroxide, and 9.1 g of a 37% formaldehyde solution were added to a three-necked flask equipped with a stirrer, a thermometer, and an air guide tube, and stirred for reaction at a temperature of 28 ° C. and a stirring rate of 250 r / min for 12 minutes, then heated to 72 ° C. and continued to stir for 1.5 hours, then added 1.4 g of molybdic acid and heated to 105 ° C. and continued to stir for 50 minutes. After the reaction, the reaction product was cooled to room temperature, and then the solvent was removed by rotary evaporation to obtain a molybdenum-containing phenolic resin; Step S5: 10g of molybdenum-containing phenolic resin, 0.25g of tetrabutylammonium bromide and 75g of epichlorohydrin were added to a three-necked flask equipped with a stirrer, a thermometer, an air guide tube and a constant pressure dropping funnel, and nitrogen protection was introduced. The mixture was stirred and reacted for 25min at a temperature of 28°C and a stirring rate of 250r / min. The mixture was then heated to 82°C and stirred for 3.5h. The mixture was then cooled to 52°C and 45mL of a 32% sodium hydroxide solution was added dropwise while stirring. The dropping rate was controlled to 1 drop / s. After the addition was complete, the reaction was continued to stir for 2.5h. 65mL of anhydrous toluene was then added and the mixture was heated to 72°C and stirred for 1.2h. After the reaction was completed, the reaction product was cooled to room temperature, washed with distilled water 4 times, and then rotary evaporated to remove the solvent to obtain an epoxy molybdenum-containing phenolic resin; Step S6: Weigh 62 parts of plate-shaped corundum, 20 parts of titanium carbide, 13 parts of activated alumina, 6 parts of polyethyleneimine-modified carbon fiber, 4.5 parts of silicon powder, 3 parts of hexagonal boron nitride, 3 parts of silicon carbide, 2.4 parts of aluminum powder, 1.4 parts of yttrium oxide, 1.3 parts of magnesium oxide, 190 parts of anhydrous ethanol, 5.8 parts of epoxy-based molybdenum-containing phenolic resin, and 21 parts of ethylene glycol in parts by weight for later use; the average particle size of the plate-shaped corundum is 0.5 mm; the average particle size of the titanium carbide is 44 μm; the average particle size of the activated alumina is 52 μm; the average particle size of the silicon powder is 68 μm; the average particle size of the hexagonal boron nitride is 80 μm; the average particle size of the silicon carbide is 78 μm; the average particle size of the aluminum powder is 60 μm; the average particle size of the yttrium oxide is 38 μm; and the average particle size of the magnesium oxide is 42 μm; Step S7: adding plate-shaped corundum, titanium carbide, activated alumina, polyethyleneimine-modified carbon fiber, silicon powder, hexagonal boron nitride, silicon carbide, aluminum powder, yttrium oxide, magnesium oxide, and anhydrous ethanol to a ball mill, ball milling for 7 hours at a ball milling speed of 350 r / min and a ball-to-material ratio of 2.5:1, and then placing the ball mill in a vacuum drying oven and drying it at 62° C. for 9 hours to obtain a ball-milled material; Step S8: adding epoxy molybdenum-containing phenolic resin and ethylene glycol to a mixer, stirring and mixing at a temperature of 28° C. and a stirring rate of 350 r / min for 25 minutes, then adding the ball mill and continuing to stir and mix for 2.5 hours, then pouring into a mold, and pressing and molding at a pressure of 175 MPa to form a green body; Step S9: Place the blank in a vacuum drying oven and dry it at 105°C for 25 hours. Then place it in a box-type atmosphere furnace, introduce nitrogen protection, sinter it at 1350°C for 2.5 hours, and then cool it in the furnace to obtain a high thermal conductivity and wear-resistant material. Example 3

[0033] This embodiment is a method for preparing a high thermal conductivity and wear-resistant material, comprising the following steps: Step S1: 1 g of Japanese Toray T-300 carbon fiber and 50 mL of anhydrous acetone were added to a three-necked flask equipped with a stirrer and a thermometer, and ultrasonically treated for 60 min at an ultrasonic frequency of 40 kHz. The mixture was then stirred at a temperature of 55 ° C and a stirring rate of 300 r / min for 8 h. After the reaction, the reaction product was cooled to room temperature and then centrifuged. The precipitate was then added to 30 mL of 22% hydrogen peroxide and soaked for 15 h. The precipitate was then vacuum filtered and the filter cake was washed with distilled water 5 times. The filter cake was then placed in a vacuum drying oven and dried at 75 ° C for 3 h to obtain pretreated carbon fiber. Step S2: 5 g of silane coupling agent KH-560, 55 mL of anhydrous ethanol and 12 mL of deionized water were added to a three-necked flask equipped with a stirrer, a thermometer and an air guide tube, and nitrogen protection was introduced. The mixture was stirred and reacted for 30 minutes at a temperature of 30° C. and a stirring rate of 300 r / min. After that, the pH was adjusted to 5 with glacial acetic acid, and then 5.6 g of pretreated carbon fiber was added and the stirring reaction was continued for 15 minutes. After that, the temperature was raised to 85° C. and the stirring reaction was continued for 6 hours. After the reaction was completed, the reaction product was cooled to room temperature and then centrifuged. The precipitate was washed with distilled water 5 times, and then placed in a vacuum drying oven and dried at a temperature of 45° C. for 8 hours to obtain coupling agent modified carbon fiber; Step S3: 10 mL of a polyethyleneimine solution with a CAS number of 9002-98-6 and a mass fraction of 50% and 50 mL of chloroform were added to a three-necked flask equipped with a stirrer, a thermometer, and an air guide tube, and nitrogen was introduced for protection. The mixture was stirred at a temperature of 30 ° C and a stirring rate of 300 r / min for 5 minutes. After that, 5 g of coupling agent-modified carbon fiber was added and the temperature was raised to 65 ° C. and the stirring reaction was continued for 30 hours. After the reaction was completed, the reaction product was cooled to room temperature and then centrifuged. The precipitate was washed with anhydrous ethanol 5 times and then placed in a vacuum drying oven and dried at a temperature of 65 ° C for 3 hours to obtain polyethyleneimine-modified carbon fiber; Step S4: 8.4 g of phenol, 0.09 g of sodium hydroxide, and 9.5 g of a 37% formaldehyde solution were added to a three-necked flask equipped with a stirrer, a thermometer, and an air guide tube, and stirred for reaction at a temperature of 30° C. and a stirring rate of 300 r / min for 15 minutes, then heated to 75° C. and continued to stir for 2 hours, then added 1.6 g of molybdic acid and heated to 110° C. and continued to stir for 60 minutes. After the reaction, the reaction product was cooled to room temperature, and then the solvent was removed by rotary evaporation to obtain a molybdenum-containing phenolic resin; Step S5: 10g of molybdenum-containing phenolic resin, 0.3g of tetrabutylammonium bromide and 80g of epichlorohydrin are added to a three-necked flask equipped with a stirrer, a thermometer, an air guide tube and a constant pressure dropping funnel, and nitrogen protection is introduced. The mixture is stirred and reacted for 30min at a temperature of 30°C and a stirring rate of 300r / min. The mixture is then heated to 85°C and stirred for 4h. The mixture is then cooled to 55°C and 50mL of a 35% sodium hydroxide solution is added dropwise while stirring. The dropping rate is controlled to 2 drops / s. After the addition is complete, the mixture is stirred and reacted for 3h. 70mL of anhydrous toluene is then added and the mixture is stirred and reacted for 1.5h at a temperature of 75°C. After the reaction is completed, the reaction product is cooled to room temperature, washed with distilled water 5 times, and then rotary evaporated to remove the solvent to obtain an epoxy molybdenum-containing phenolic resin; Step S6: Weigh 65 parts of plate-shaped corundum, 22 parts of titanium carbide, 16 parts of activated alumina, 9 parts of polyethyleneimine-modified carbon fiber, 5.5 parts of silicon powder, 5 parts of hexagonal boron nitride, 4 parts of silicon carbide, 3.2 parts of aluminum powder, 1.7 parts of yttrium oxide, 1.5 parts of magnesium oxide, 200 parts of anhydrous ethanol, 9.3 parts of epoxy-based molybdenum-containing phenolic resin, and 33 parts of ethylene glycol in parts by weight for later use; the average particle size of the plate-shaped corundum is 0.5 mm; the average particle size of the titanium carbide is 44 μm; the average particle size of the activated alumina is 52 μm; the average particle size of the silicon powder is 68 μm; the average particle size of the hexagonal boron nitride is 80 μm; the average particle size of the silicon carbide is 78 μm; the average particle size of the aluminum powder is 60 μm; the average particle size of the yttrium oxide is 38 μm; and the average particle size of the magnesium oxide is 42 μm; Step S7: adding plate-shaped corundum, titanium carbide, activated alumina, polyethyleneimine-modified carbon fiber, silicon powder, hexagonal boron nitride, silicon carbide, aluminum powder, yttrium oxide, magnesium oxide, and anhydrous ethanol to a ball mill, ball milling for 10 h at a ball-to-material ratio of 3:1, and then placing the ball mill in a vacuum drying oven and drying it at 65° C. for 10 h to obtain a ball-milled material; Step S8: adding epoxy molybdenum-containing phenolic resin and ethylene glycol to a mixer, stirring and mixing at a temperature of 30° C. and a stirring rate of 400 r / min for 30 minutes, then adding the ball mill and continuing to stir and mix for 3 hours, then pouring into a mold, and pressing and molding at a pressure of 200 MPa to form a green body; Step S9: Place the blank in a vacuum drying oven and dry it at 110°C for 30 hours. Then place it in a box-type atmosphere furnace, introduce nitrogen protection, sinter it at 1400°C for 3 hours, and then cool it in the furnace to obtain a high thermal conductivity and wear-resistant material.

[0034] Comparative Example 1: This comparative example is a method for preparing a high thermal conductivity and wear-resistant material, comprising the following steps: Step S1: 8.4 g of phenol, 0.09 g of sodium hydroxide, and 9.5 g of a 37% formaldehyde solution were added to a three-necked flask equipped with a stirrer, a thermometer, and an air guide tube, and stirred for reaction at a temperature of 30° C. and a stirring rate of 300 r / min for 15 minutes, then heated to 75° C. and continued to stir for 2 hours, then heated to 110° C. and continued to stir for 60 minutes. After the reaction, the reaction product was cooled to room temperature, and then the solvent was removed by rotary evaporation to obtain a phenolic resin; Step S2: Weigh 65 parts of plate-shaped corundum, 22 parts of titanium carbide, 16 parts of activated alumina, 5.5 parts of silicon powder, 5 parts of hexagonal boron nitride, 4 parts of silicon carbide, 3.2 parts of aluminum powder, 1.7 parts of yttrium oxide, 1.5 parts of magnesium oxide, 200 parts of anhydrous ethanol, 9.3 parts of phenolic resin, and 33 parts of ethylene glycol in parts by weight for later use; the average particle size of the plate-shaped corundum is 0.5 mm; the average particle size of the titanium carbide is 44 μm; the average particle size of the activated alumina is 52 μm; the average particle size of the silicon powder is 68 μm; the average particle size of the hexagonal boron nitride is 80 μm; the average particle size of the silicon carbide is 78 μm; the average particle size of the aluminum powder is 60 μm; the average particle size of the yttrium oxide is 38 μm; and the average particle size of the magnesium oxide is 42 μm; Step S3: adding plate-shaped corundum, titanium carbide, activated alumina, silicon powder, hexagonal boron nitride, silicon carbide, aluminum powder, yttrium oxide, magnesium oxide, and anhydrous ethanol into a ball mill, ball milling for 10 h at a ball-to-material ratio of 3:1, and then placing the ball mill in a vacuum drying oven and drying it at 65° C. for 10 h to obtain a ball-milled material; Step S4: adding phenolic resin and ethylene glycol into a mixer, stirring and mixing at a temperature of 30° C. and a stirring rate of 400 r / min for 30 min, then adding the ball mill and continuing to stir and mix for 3 h, then pouring into a mold, and pressing at a pressure of 200 MPa to form a green body; Step S5: Place the green body in a vacuum drying oven and dry it at 110°C for 30 hours. Then place it in a box-type atmosphere furnace, introduce nitrogen protection, sinter it at 1400°C for 3 hours, and then cool it in the furnace to obtain a high thermal conductivity and wear-resistant material.

[0035] Comparative Example 2: This comparative example is a method for preparing a high thermal conductivity and wear-resistant material, comprising the following steps: Step S1: 8.4 g of phenol, 0.09 g of sodium hydroxide, and 9.5 g of a 37% formaldehyde solution were added to a three-necked flask equipped with a stirrer, a thermometer, and an air guide tube, and stirred for 15 minutes at a temperature of 30° C. and a stirring rate of 300 r / min. The mixture was then heated to 75° C. and stirred for 2 hours. 1.6 g of molybdic acid was then added and the mixture was heated to 110° C. and stirred for 60 minutes. After the reaction, the reaction product was cooled to room temperature, and the solvent was removed by rotary evaporation to obtain a molybdenum-containing phenolic resin. Step S2: 10g of molybdenum-containing phenolic resin, 0.3g of tetrabutylammonium bromide and 80g of epichlorohydrin are added to a three-necked flask equipped with a stirrer, a thermometer, an air guide tube and a constant pressure dropping funnel, and nitrogen protection is introduced. The mixture is stirred and reacted for 30min at a temperature of 30°C and a stirring rate of 300r / min. The mixture is then heated to 85°C and stirred for 4h. The mixture is then cooled to 55°C and 50mL of a 35% sodium hydroxide solution is added dropwise while stirring. The dropping rate is controlled to 2 drops / s. After the addition is complete, the mixture is stirred and reacted for 3h. 70mL of anhydrous toluene is then added and the mixture is stirred and reacted for 1.5h at a temperature of 75°C. After the reaction is completed, the reaction product is cooled to room temperature, washed with distilled water 5 times, and then rotary evaporated to remove the solvent to obtain an epoxy molybdenum-containing phenolic resin; Step S3: Weigh 65 parts of plate-shaped corundum, 22 parts of titanium carbide, 16 parts of activated alumina, 5.5 parts of silicon powder, 5 parts of hexagonal boron nitride, 4 parts of silicon carbide, 3.2 parts of aluminum powder, 1.7 parts of yttrium oxide, 1.5 parts of magnesium oxide, 200 parts of anhydrous ethanol, 9.3 parts of epoxy-based molybdenum-containing phenolic resin, and 33 parts of ethylene glycol in parts by weight for later use; the average particle size of the plate-shaped corundum is 0.5 mm; the average particle size of the titanium carbide is 44 μm; the average particle size of the activated alumina is 52 μm; the average particle size of the silicon powder is 68 μm; the average particle size of the hexagonal boron nitride is 80 μm; the average particle size of the silicon carbide is 78 μm; the average particle size of the aluminum powder is 60 μm; the average particle size of the yttrium oxide is 38 μm; and the average particle size of the magnesium oxide is 42 μm; Step S4: adding plate-shaped corundum, titanium carbide, activated alumina, silicon powder, hexagonal boron nitride, silicon carbide, aluminum powder, yttrium oxide, magnesium oxide, and anhydrous ethanol into a ball mill, ball milling for 10 h at a ball-to-material ratio of 3:1, and then placing the ball mill in a vacuum drying oven and drying it at 65° C. for 10 h to obtain a ball-milled material; Step S5: adding epoxy molybdenum-containing phenolic resin and ethylene glycol to a mixer, stirring and mixing at a temperature of 30° C. and a stirring rate of 400 r / min for 30 minutes, then adding the ball mill and continuing to stir and mix for 3 hours, then pouring into a mold, and pressing and molding at a pressure of 200 MPa to form a green body; Step S6: Place the green body in a vacuum drying oven and dry it at 110°C for 30 hours. Then place it in a box-type atmosphere furnace, introduce nitrogen protection, sinter it at 1400°C for 3 hours, and then cool it in the furnace to obtain a high thermal conductivity and wear-resistant material.

[0036] Comparative Example 3: This comparative example is a method for preparing a high thermal conductivity and wear-resistant material, comprising the following steps: Step S1: 8.4 g of phenol, 0.09 g of sodium hydroxide, and 9.5 g of a 37% formaldehyde solution were added to a three-necked flask equipped with a stirrer, a thermometer, and an air guide tube, and stirred for 15 minutes at a temperature of 30° C. and a stirring rate of 300 r / min. The mixture was then heated to 75° C. and stirred for 2 hours. 1.6 g of molybdic acid was then added and the mixture was heated to 110° C. and stirred for 60 minutes. After the reaction, the reaction product was cooled to room temperature, and the solvent was removed by rotary evaporation to obtain a molybdenum-containing phenolic resin. Step S2: 10g of molybdenum-containing phenolic resin, 0.3g of tetrabutylammonium bromide and 80g of epichlorohydrin are added to a three-necked flask equipped with a stirrer, a thermometer, an air guide tube and a constant pressure dropping funnel, and nitrogen protection is introduced. The mixture is stirred and reacted for 30min at a temperature of 30°C and a stirring rate of 300r / min. The mixture is then heated to 85°C and stirred for 4h. The mixture is then cooled to 55°C and 50mL of a 35% sodium hydroxide solution is added dropwise while stirring. The dropping rate is controlled to 2 drops / s. After the addition is complete, the mixture is stirred and reacted for 3h. 70mL of anhydrous toluene is then added and the mixture is stirred and reacted for 1.5h at a temperature of 75°C. After the reaction is completed, the reaction product is cooled to room temperature, washed with distilled water 5 times, and then rotary evaporated to remove the solvent to obtain an epoxy molybdenum-containing phenolic resin; Step S3: Weigh 65 parts of plate-shaped corundum, 22 parts of titanium carbide, 16 parts of activated alumina, 9 parts of Japan Toray T-300 carbon fiber, 5.5 parts of silicon powder, 5 parts of hexagonal boron nitride, 4 parts of silicon carbide, 3.2 parts of aluminum powder, 1.7 parts of yttrium oxide, 1.5 parts of magnesium oxide, 200 parts of anhydrous ethanol, 9.3 parts of epoxy-based molybdenum-containing phenolic resin, and 33 parts of ethylene glycol in parts by weight for later use; the average particle size of the plate-shaped corundum is 0.5 mm; the average particle size of the titanium carbide is 44 μm; the average particle size of the activated alumina is 52 μm; the average particle size of the silicon powder is 68 μm; the average particle size of the hexagonal boron nitride is 80 μm; the average particle size of the silicon carbide is 78 μm; the average particle size of the aluminum powder is 60 μm; the average particle size of the yttrium oxide is 38 μm; and the average particle size of the magnesium oxide is 42 μm; Step S4: adding plate-shaped corundum, titanium carbide, activated alumina, Japanese Toray T-300 carbon fiber, silicon powder, hexagonal boron nitride, silicon carbide, aluminum powder, yttrium oxide, magnesium oxide, and anhydrous ethanol to a ball mill, ball milling for 10 h at a ball-to-material ratio of 3:1, and then placing in a vacuum drying oven and drying at 65°C for 10 h to obtain a ball-milled material; Step S5: adding epoxy molybdenum-containing phenolic resin and ethylene glycol to a mixer, stirring and mixing at a temperature of 30° C. and a stirring rate of 400 r / min for 30 minutes, then adding the ball mill and continuing to stir and mix for 3 hours, then pouring into a mold, and pressing and molding at a pressure of 200 MPa to form a green body; Step S6: Place the green body in a vacuum drying oven and dry it at 110°C for 30 hours. Then place it in a box-type atmosphere furnace, introduce nitrogen protection, sinter it at 1400°C for 3 hours, and then cool it in the furnace to obtain a high thermal conductivity and wear-resistant material.

[0037] Comparative Example 4: This comparative example is a method for preparing a high thermal conductivity and wear-resistant material, comprising the following steps: Step S1: 1 g of Japanese Toray T-300 carbon fiber and 50 mL of anhydrous acetone were added to a three-necked flask equipped with a stirrer and a thermometer, and ultrasonically treated for 60 min at an ultrasonic frequency of 40 kHz. The mixture was then stirred at a temperature of 55 ° C and a stirring rate of 300 r / min for 8 h. After the reaction, the reaction product was cooled to room temperature and then centrifuged. The precipitate was then added to 30 mL of 22% hydrogen peroxide and soaked for 15 h. The precipitate was then vacuum filtered and the filter cake was washed with distilled water 5 times. The filter cake was then placed in a vacuum drying oven and dried at 75 ° C for 3 h to obtain pretreated carbon fiber. Step S2: 5 g of silane coupling agent KH-560, 55 mL of anhydrous ethanol and 12 mL of deionized water were added to a three-necked flask equipped with a stirrer, a thermometer and an air guide tube, and nitrogen protection was introduced. The mixture was stirred and reacted for 30 minutes at a temperature of 30° C. and a stirring rate of 300 r / min. After that, the pH was adjusted to 5 with glacial acetic acid, and then 5.6 g of pretreated carbon fiber was added and the stirring reaction was continued for 15 minutes. After that, the temperature was raised to 85° C. and the stirring reaction was continued for 6 hours. After the reaction was completed, the reaction product was cooled to room temperature and then centrifuged. The precipitate was washed with distilled water 5 times, and then placed in a vacuum drying oven and dried at a temperature of 45° C. for 8 hours to obtain coupling agent modified carbon fiber; Step S3: 10 mL of a polyethyleneimine solution with a CAS number of 9002-98-6 and a mass fraction of 50% and 50 mL of chloroform were added to a three-necked flask equipped with a stirrer, a thermometer, and an air guide tube, and nitrogen was introduced for protection. The mixture was stirred at a temperature of 30 ° C and a stirring rate of 300 r / min for 5 minutes. After that, 5 g of coupling agent-modified carbon fiber was added and the temperature was raised to 65 ° C. and the stirring reaction was continued for 30 hours. After the reaction was completed, the reaction product was cooled to room temperature and then centrifuged. The precipitate was washed with anhydrous ethanol 5 times and then placed in a vacuum drying oven and dried at a temperature of 65 ° C for 3 hours to obtain polyethyleneimine-modified carbon fiber; Step S4: 8.4 g of phenol, 0.09 g of sodium hydroxide, and 9.5 g of a 37% formaldehyde solution were added to a three-necked flask equipped with a stirrer, a thermometer, and an air guide tube, and stirred for reaction at a temperature of 30° C. and a stirring rate of 300 r / min for 15 minutes, then heated to 75° C. and continued to stir for 2 hours, then heated to 110° C. and continued to stir for 60 minutes. After the reaction, the reaction product was cooled to room temperature, and then the solvent was removed by rotary evaporation to obtain a phenolic resin; Step S5: Weigh 65 parts of plate-shaped corundum, 22 parts of titanium carbide, 16 parts of activated alumina, 9 parts of polyethyleneimine-modified carbon fiber, 5.5 parts of silicon powder, 5 parts of hexagonal boron nitride, 4 parts of silicon carbide, 3.2 parts of aluminum powder, 1.7 parts of yttrium oxide, 1.5 parts of magnesium oxide, 200 parts of anhydrous ethanol, 9.3 parts of phenolic resin, and 33 parts of ethylene glycol in parts by weight for later use; the average particle size of the plate-shaped corundum is 0.5 mm; the average particle size of the titanium carbide is 44 μm; the average particle size of the activated alumina is 52 μm; the average particle size of the silicon powder is 68 μm; the average particle size of the hexagonal boron nitride is 80 μm; the average particle size of the silicon carbide is 78 μm; the average particle size of the aluminum powder is 60 μm; the average particle size of the yttrium oxide is 38 μm; and the average particle size of the magnesium oxide is 42 μm; Step S6: adding plate-shaped corundum, titanium carbide, activated alumina, polyethyleneimine-modified carbon fiber, silicon powder, hexagonal boron nitride, silicon carbide, aluminum powder, yttrium oxide, magnesium oxide, and anhydrous ethanol into a ball mill, ball milling for 10 h at a ball-to-material ratio of 3:1, and then placing the ball mill in a vacuum drying oven and drying it at 65° C. for 10 h to obtain a ball-milled material; Step S7: Phenolic resin and ethylene glycol were added to a mixer, stirred and mixed at a temperature of 30° C. and a stirring rate of 400 r / min for 30 min, then the ball mill was added and stirred and mixed for 3 h, then poured into a mold, and pressed at a pressure of 200 MPa to form a green body; Step S8: Place the blank in a vacuum drying oven and dry it at 110°C for 30 hours. Then place it in a box-type atmosphere furnace, introduce nitrogen protection, sinter it at 1400°C for 3 hours, and then cool it in the furnace to obtain a high thermal conductivity and wear-resistant material.

[0038] Comparative Example 5: This comparative example is a method for preparing a high thermal conductivity and wear-resistant material, comprising the following steps: Step S1: 1 g of Japanese Toray T-300 carbon fiber and 50 mL of anhydrous acetone were added to a three-necked flask equipped with a stirrer and a thermometer, and ultrasonically treated for 60 min at an ultrasonic frequency of 40 kHz. The mixture was then stirred at a temperature of 55 ° C and a stirring rate of 300 r / min for 8 h. After the reaction, the reaction product was cooled to room temperature and then centrifuged. The precipitate was then added to 30 mL of 22% hydrogen peroxide and soaked for 15 h. The precipitate was then vacuum filtered and the filter cake was washed with distilled water 5 times. The filter cake was then placed in a vacuum drying oven and dried at 75 ° C for 3 h to obtain pretreated carbon fiber. Step S2: 5 g of silane coupling agent KH-560, 55 mL of anhydrous ethanol and 12 mL of deionized water were added to a three-necked flask equipped with a stirrer, a thermometer and an air guide tube, and nitrogen protection was introduced. The mixture was stirred and reacted for 30 minutes at a temperature of 30° C. and a stirring rate of 300 r / min. After that, the pH was adjusted to 5 with glacial acetic acid, and then 5.6 g of pretreated carbon fiber was added and the stirring reaction was continued for 15 minutes. After that, the temperature was raised to 85° C. and the stirring reaction was continued for 6 hours. After the reaction was completed, the reaction product was cooled to room temperature and then centrifuged. The precipitate was washed with distilled water 5 times, and then placed in a vacuum drying oven and dried at a temperature of 45° C. for 8 hours to obtain coupling agent modified carbon fiber; Step S3: 10 mL of a polyethyleneimine solution with a CAS number of 9002-98-6 and a mass fraction of 50% and 50 mL of chloroform were added to a three-necked flask equipped with a stirrer, a thermometer, and an air guide tube, and nitrogen was introduced for protection. The mixture was stirred at a temperature of 30 ° C and a stirring rate of 300 r / min for 5 minutes. After that, 5 g of coupling agent-modified carbon fiber was added and the temperature was raised to 65 ° C. and the stirring reaction was continued for 30 hours. After the reaction was completed, the reaction product was cooled to room temperature and then centrifuged. The precipitate was washed with anhydrous ethanol 5 times and then placed in a vacuum drying oven and dried at a temperature of 65 ° C for 3 hours to obtain polyethyleneimine-modified carbon fiber; Step S4: 8.4 g of phenol, 0.09 g of sodium hydroxide, and 9.5 g of a 37% formaldehyde solution were added to a three-necked flask equipped with a stirrer, a thermometer, and an air guide tube, and stirred for reaction at a temperature of 30° C. and a stirring rate of 300 r / min for 15 minutes, then heated to 75° C. and continued to stir for 2 hours, then added 1.6 g of molybdic acid and heated to 110° C. and continued to stir for 60 minutes. After the reaction, the reaction product was cooled to room temperature, and then the solvent was removed by rotary evaporation to obtain a molybdenum-containing phenolic resin; Step S5: Weigh 65 parts of plate-shaped corundum, 22 parts of titanium carbide, 16 parts of activated alumina, 9 parts of polyethyleneimine-modified carbon fiber, 5.5 parts of silicon powder, 5 parts of hexagonal boron nitride, 4 parts of silicon carbide, 3.2 parts of aluminum powder, 1.7 parts of yttrium oxide, 1.5 parts of magnesium oxide, 200 parts of anhydrous ethanol, 9.3 parts of molybdenum-containing phenolic resin, and 33 parts of ethylene glycol in parts by weight for later use; the average particle size of the plate-shaped corundum is 0.5 mm; the average particle size of the titanium carbide is 44 μm; the average particle size of the activated alumina is 52 μm; the average particle size of the silicon powder is 68 μm; the average particle size of the hexagonal boron nitride is 80 μm; the average particle size of the silicon carbide is 78 μm; the average particle size of the aluminum powder is 60 μm; the average particle size of the yttrium oxide is 38 μm; and the average particle size of the magnesium oxide is 42 μm; Step S6: adding plate-shaped corundum, titanium carbide, activated alumina, polyethyleneimine-modified carbon fiber, silicon powder, hexagonal boron nitride, silicon carbide, aluminum powder, yttrium oxide, magnesium oxide, and anhydrous ethanol into a ball mill, ball milling for 10 h at a ball-to-material ratio of 3:1, and then placing the ball mill in a vacuum drying oven and drying it at 65° C. for 10 h to obtain a ball-milled material; Step S7: adding the molybdenum-containing phenolic resin and ethylene glycol to a mixer, stirring and mixing at a temperature of 30° C. and a stirring rate of 400 r / min for 30 min, then adding the ball mill and continuing to stir and mix for 3 h, then pouring the mixture into a mold, and pressing and molding at a pressure of 200 MPa to form a green body; Step S8: Place the blank in a vacuum drying oven and dry it at 110°C for 30 hours. Then place it in a box-type atmosphere furnace, introduce nitrogen protection, sinter it at 1400°C for 3 hours, and then cool it in the furnace to obtain a high thermal conductivity and wear-resistant material.

[0039] The high thermal conductivity and wear-resistant materials of Examples 1-3 and Comparative Examples 1-5 were tested for compressive strength according to GB / T 5072-2008, for flexural strength according to GB / T 3001-2007, for thermal conductivity according to GB / T 5990-2021, and for wear volume according to GB / T18301-2012. The test results are shown in the following table:

[0040] Referring to the data in the above table, according to the comparison between Examples 1-3 and Comparative Examples 1-5, it can be seen that adding polyethyleneimine-modified carbon fiber as a reinforcing phase and using epoxy-based molybdenum-containing phenolic resin as a binder can significantly improve the mechanical properties, thermal conductivity and wear resistance of the high thermal conductivity and wear-resistant material, so that the prepared high thermal conductivity and wear-resistant material has excellent comprehensive performance.

[0041] Throughout this specification, references to terms such as "one embodiment," "example," or "specific example" indicate that the specific features, structures, materials, or characteristics described in conjunction with that embodiment or example are included in at least one embodiment or example of the present invention. In this specification, schematic representations of these terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples.

[0042] The above contents are merely examples and explanations of the present invention. Those skilled in the art may make various modifications or additions to the described specific embodiments or replace them in similar ways. As long as they do not deviate from the invention or exceed the scope defined in this application, they should all fall within the scope of protection of the present invention.

Claims

1. A high thermal conductivity and wear-resistant material, characterized in that: It comprises the following components in parts by weight: 60-65 parts of plate-shaped corundum, 18-22 parts of titanium carbide, 10-16 parts of activated alumina, 3-9 parts of polyethyleneimine-modified carbon fibers, 3.5-5.5 parts of silicon powder, 1-5 parts of hexagonal boron nitride, 2-4 parts of silicon carbide, 1.6-3.2 parts of aluminum powder, 1.1-1.7 parts of yttrium oxide, 1-1.5 parts of magnesium oxide, 180-200 parts of anhydrous ethanol, 2.3-9.3 parts of epoxy-based molybdenum-containing phenolic resin, and 9-33 parts of ethylene glycol; The high thermal conductivity and wear-resistant material is prepared by the following steps: Step 1: ball-milling plate-shaped corundum, titanium carbide, activated alumina, polyethyleneimine-modified carbon fiber, silicon powder, hexagonal boron nitride, silicon carbide, aluminum powder, yttrium oxide, magnesium oxide and anhydrous ethanol, and then drying to obtain a ball-milled material; Step 2: stirring and mixing the epoxy molybdenum-containing phenolic resin and ethylene glycol, then adding the ball mill and continuing to stir and mix, and then pressing and forming to form a green body; Step 3: Dry the green body and then sinter it to obtain a high thermal conductivity and wear-resistant material.

2. A high thermal conductivity and wear-resistant material according to claim 1, characterized in that: The average particle size of the plate-shaped corundum is 0.5 mm; The average particle size of the titanium carbide is 44 μm; The average particle size of the activated alumina is 52 μm; The average particle size of the silicon powder is 68 μm; The average particle size of the hexagonal boron nitride is 80 μm; The average particle size of the silicon carbide is 78 μm; The average particle size of the aluminum powder is 60 μm; The average particle size of the yttrium oxide is 38 μm; The average particle size of the magnesium oxide is 42 μm.

3. The high thermal conductivity and wear-resistant material according to claim 1, characterized in that: The polyethyleneimine modified carbon fiber is prepared by the following steps: Step a1: subjecting carbon fiber and anhydrous acetone to ultrasonic treatment, followed by stirring for reaction, cooling the reaction product after the reaction is completed, and then centrifuging it. Then, the precipitate is added to hydrogen peroxide for immersion, and then vacuum filtered, and the filter cake is washed and dried to obtain pretreated carbon fiber; Step a2: stirring the silane coupling agent KH-560, anhydrous ethanol and deionized water, adjusting the pH with glacial acetic acid, adding the pretreated carbon fiber and continuing to stir and react. After the reaction is completed, the reaction product is cooled and centrifuged, and the precipitate is washed and dried to obtain the coupling agent modified carbon fiber; Step a3: stirring the polyethyleneimine solution and chloroform to react, then adding the coupling agent to modify the carbon fiber and continuing to stir the reaction. After the reaction is completed, the reaction product is cooled and then centrifuged. The precipitate is then washed and dried to obtain the polyethyleneimine modified carbon fiber.

4. The high thermal conductivity and wear-resistant material according to claim 3, characterized in that: In step a1, the usage ratio of the carbon fiber, anhydrous acetone and hydrogen peroxide is 1 g: 40-50 mL: 20-30 mL; the mass fraction of the hydrogen peroxide is 20-22%.

5. The high thermal conductivity and wear-resistant material according to claim 3, characterized in that: The usage ratio of the silane coupling agent KH-560, anhydrous ethanol, deionized water and pretreated carbon fiber in step a2 is 5g:50-55mL:10-12mL:2.2-5.6g.

6. The high thermal conductivity and wear-resistant material according to claim 3, characterized in that: The usage ratio of the polyethyleneimine solution, chloroform and coupling agent-modified carbon fiber in step a3 is 8-10 mL: 40-50 mL: 5 g.

7. The high thermal conductivity and wear-resistant material according to claim 1, characterized in that: The epoxy molybdenum-containing phenolic resin is prepared by the following steps: Step b1: stirring phenol, sodium hydroxide and formaldehyde solution to react, then adding molybdic acid and continuing to stir the reaction, cooling the reaction product after the reaction is completed, and then rotary evaporating to obtain a molybdenum-containing phenolic resin; Step b2: stirring the molybdenum-containing phenolic resin, tetrabutylammonium bromide and epichlorohydrin, then adding sodium hydroxide solution and continuing to stir the reaction, then adding anhydrous toluene and continuing to stir the reaction. After the reaction is completed, the reaction product is cooled, washed, and then rotary evaporated to obtain the epoxy molybdenum-containing phenolic resin.

8. The high thermal conductivity and wear-resistant material according to claim 7, characterized in that: The usage ratio of the phenol, sodium hydroxide, formaldehyde solution and molybdic acid in step b1 is 8.4 g: 0.05-0.09 g: 8.7-9.5 g: 1.2-1.6 g; the mass fraction of the formaldehyde solution is 37%.

9. The high thermal conductivity and wear-resistant material according to claim 7, characterized in that: The molybdenum-containing phenolic resin, tetrabutylammonium bromide, epichlorohydrin, sodium hydroxide solution and anhydrous toluene in step b2 are used in a ratio of 10 g: 0.2-0.3 g: 70-80 g: 40-50 mL: 60-70 mL; the mass fraction of the sodium hydroxide solution is 30-35%.

10. Use of the refractory material according to any one of claims 1 to 9 in the anti-wear layer of the dense phase zone and transition zone of a circulating fluidized bed boiler.

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