A method for integrally forming a ceramic hollow intake passage

Abstract

The present application relates to ceramic air inlet channel technical field, specifically to a kind of ceramic hollow air inlet channel integrated forming method: including following weight parts raw materials: 60~80 parts silicon nitride, 4~6 parts magnesium oxide, 4~6 parts filler, 2~4 parts silicon dioxide, 2~4 parts modified four acicular zinc oxide whisker, 2~4 parts alumina and 1~3 parts lanthanum oxide.In the present application, the thermal expansion matching of basalt fiber and silicon nitride is further optimized by the coating of silicon dioxide, the cracking phenomenon during high-temperature sintering is reduced, by the addition of aramid fiber and polyimide, the high modulus characteristics are utilized, which can share external load, at the same time, the elastic properties of polyurethane are utilized, which can inhibit crack propagation, the crosslinking density and thermal conductivity of filler are improved by the epoxy resin and graphene in modified acrylic ester, a multi-scale reinforced network is formed, and the strength performance of ceramic hollow air inlet channel under high temperature is effectively improved.

Description

Technical Field

[0001] The present invention relates to the technical field of ceramic air intake ducts, and in particular to a method for integrally forming a ceramic hollow air intake duct. Background Art

[0002] The ceramic hollow air intake duct is an air intake duct with a hollow structure made of special ceramic materials. It has the advantages of high strength, high temperature resistance, good thermal insulation and corrosion resistance, and can effectively transmit air when the engine is working.

[0003] In the prior art, ceramic hollow air intake ducts, when used in high-temperature environments, can cause changes in the crystal structure of the ceramic material, thereby compromising the strength of the ceramic hollow air intake duct and making it susceptible to cracking and damage. Based on this, the present invention provides a method for integrally forming a ceramic hollow air intake duct. Summary of the Invention

[0004] The purpose of the present invention is to provide a method for integrally forming a ceramic hollow air intake duct. The ceramic hollow air intake duct prepared by the present invention not only has good strength performance, but also has excellent toughness, which effectively improves the performance of the ceramic hollow air intake duct.

[0005] To achieve the above object, the present invention provides the following technical solutions:

[0006] In a first aspect, the present invention provides a ceramic hollow air inlet duct comprising the following raw materials in parts by weight: 60 to 80 parts of silicon nitride, 4 to 6 parts of magnesium oxide, 4 to 6 parts of filler, 2 to 4 parts of silicon dioxide, 2 to 4 parts of modified tetrapod-shaped zinc oxide whiskers, 2 to 4 parts of aluminum oxide, and 1 to 3 parts of lanthanum oxide;

[0007] The filler is composed of the following raw materials: modified basalt fiber, modified acrylic ester, aramid fiber, polyurethane and polyimide, and the mass ratio of the modified basalt fiber, modified acrylic ester, aramid fiber, polyurethane and polyimide is 4:1: (0.2-0.4): (0.4-0.6): (0.4-0.6).

[0008] Furthermore, the modified basalt fiber is prepared by the following method: selecting basalt fiber as a base material, immersing the basalt fiber in an ethanol solution for ultrasonic cleaning, adding the fiber to a vacuum chamber of a plasma treatment device after cleaning, setting the introduction of a mixed gas of equal amounts of nitrogen and oxygen, the radio frequency power being 100-200W, and the treatment time being 3-5 minutes, immersing the resulting product in a silane coupling agent - KH560, and allowing the reaction to proceed at 50-60°C for 20-30 minutes, adding the resulting product to a mixer, adding silica to the mixer, setting the mixer to 200-300 r / min for stirring for 10-20 minutes, adding the resulting product to an oven, setting the temperature at 200-300°C for treatment for 20-30 minutes, and preparing the modified basalt fiber.

[0009] Furthermore, the mass concentration of the ethanol solution is 30-40%, and the mass concentration of the silane coupling agent-KH560 is 1-3%.

[0010] Furthermore, the modified acrylate is prepared by the following method: selecting acrylate as the base material, adding acrylate and epoxy resin into a mixer, setting the mixer to 120-160 r / min and stirring for 6-10 minutes, then adding bismaleimide, aluminum oxide, graphene and polyurethane prepolymer, setting the mixer to 300-400 r / min and stirring for 10-20 minutes, adding the resulting product into an ultrasonic disperser, setting the power to 1000-2000 W, and the processing time to 4-6 minutes, and subjecting the resulting product to ultraviolet curing to obtain the modified acrylate.

[0011] Furthermore, the mass of the epoxy resin is 20-30% of the mass of the acrylate, the mass of the graphene is 4-6% of the mass of the acrylate, and the mass of the polyurethane prepolymer is 4-6% of the mass of the acrylate.

[0012] Furthermore, the filler is prepared by the following method: modified basalt fiber, modified acrylic ester, aramid fiber, polyurethane and polyimide are added to a mixer, the mixer is set to 300-400 r / min and stirred for 20-30 minutes, the resulting product is sent to a muffle furnace, the heating rate is set to 8-12°C / min, the temperature is raised to 400-500°C, and the temperature is kept warm for 20-30 minutes, the resulting product is ground, and the ground particle size is 40-60 μm to obtain a filler.

[0013] Furthermore, the modified four-needle zinc oxide whisker is prepared by the following method: four-needle zinc oxide whisker is selected as the base material, the four-needle zinc oxide whisker and the mixture are added to a mixer, the mixer is set to 200-300 r / min and stirred for 10-20 minutes, the resulting product is sent to a muffle furnace, the heating rate is set to 10-20°C / min, the temperature is raised to 500-600°C, and the temperature is kept for 10-20 minutes, the resulting product is ground, and the ground particle size is 40-60 μm to obtain modified four-needle zinc oxide whisker.

[0014] Furthermore, the mixture is prepared by mixing tin powder, ammonia water and anhydrous ethanol, the mass ratio of the tin powder, ammonia water and anhydrous ethanol is 1: (0.1-0.3): (0.6-0.8), and the mass concentration of ammonia water is 20-30%.

[0015] Furthermore, the aluminum oxide is selected to have a nanoparticle size of 20 to 40 nm.

[0016] In a second aspect, the present invention further provides a method for integrally forming a ceramic hollow air inlet duct, comprising the following steps:

[0017] S1: Mixing process: silicon nitride, magnesium oxide, filler, modified tetrapod-shaped zinc oxide whisker and lanthanum oxide are weighed as needed and added into a mixer. The mixer is set at 600-800 r / min and stirred for 20-30 minutes to obtain a powder;

[0018] S2: ball milling treatment: the powder and water are added to a ball mill for wet ball milling treatment for 4 to 6 hours to obtain a slurry. The slurry is filtered to obtain a solid. The solid is sent to an oven at 60 to 80°C and dried for 1 to 3 hours to obtain a mud material.

[0019] S3: Sintering treatment: the clay is made into a hollow embryo through a mold, the hollow embryo is sent to a bisque firing furnace, set at 400-800℃ for pre-firing treatment for 1-3 hours, and then sent to a kiln, set at 1200-1600℃ for sintering treatment for 1-3 hours to obtain a ceramic hollow air inlet duct.

[0020] Compared with the prior art, the present invention has the following beneficial effects:

[0021] 1. In the present invention, the surface activity of basalt fiber is increased after modification, thereby enhancing the interfacial bonding strength with the ceramic base material (silicon nitride). The silica coating further optimizes the thermal expansion matching of basalt fiber and silicon nitride, reducing cracking during high-temperature sintering. The addition of aramid fiber and polyimide, utilizing their high modulus properties, can play a role in sharing external loads. At the same time, the elastic properties of polyurethane can be utilized to inhibit crack propagation. The epoxy resin and graphene in the modified acrylate increase the crosslinking density and thermal conductivity of the filler, forming a multi-scale reinforcement network, which effectively improves the strength performance of the ceramic hollow air intake at high temperatures.

[0022] 2. In the present invention, the four-needle zinc oxide whiskers utilize their unique three-dimensional needle-like structure to form an interlocking network structure in the ceramic material, limit the slippage of the matrix particles, and improve the overall rigidity of the material. By high-temperature treatment of a mixture of tin powder, ammonia water, and ethanol, a tin oxide coating can be generated on the surface of the four-needle zinc oxide whiskers, thereby improving their compatibility with the ceramic matrix. During the high-temperature sintering process, the modified four-needle zinc oxide whiskers form a strong chemical bonding interface with the ceramic matrix, further improving the creep resistance of the ceramic hollow air inlet duct at high temperatures and ensuring the structural stability of the ceramic hollow air inlet duct under extreme working conditions. DETAILED DESCRIPTION

[0023] 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 creative efforts are within the scope of protection of the present invention.

[0024] It should be noted that the raw materials used in the following examples are all commercially available raw materials.

[0025] Example 1:

[0026] The method comprises the following raw materials in parts by weight: 60 parts of silicon nitride, 4 parts of magnesium oxide, 4 parts of filler, 2 parts of silicon dioxide, 2 parts of modified tetrapod-shaped zinc oxide whiskers, 2 parts of aluminum oxide and 1 part of lanthanum oxide;

[0027] The filler is composed of the following raw materials: modified basalt fiber, modified acrylate, aramid fiber, polyurethane and polyimide, and the mass ratio of the modified basalt fiber, modified acrylate, aramid fiber, polyurethane and polyimide is 4:1: (0.2): (0.4): (0.4).

[0028] The modified basalt fiber is prepared by the following method: basalt fiber is selected as a base material, the basalt fiber is immersed in an ethanol solution for ultrasonic cleaning, and after cleaning, the basalt fiber is added to a vacuum chamber of a plasma treatment equipment, and a mixed gas of equal amounts of nitrogen and oxygen is set to be introduced, the radio frequency power is 100W, and the treatment time is 3 minutes. The obtained product is immersed in a silane coupling agent-KH560, and is allowed to react at 50°C for 20 minutes. The obtained product is added to a mixer, silica is added to the mixer, and the mixer is set to 200r / min for stirring for 10 minutes. The obtained product is added to an oven, set to 200°C for treatment for 20 minutes, to obtain the modified basalt fiber.

[0029] The mass concentration of the ethanol solution is 30%, and the mass concentration of the silane coupling agent-KH560 is 1%.

[0030] The modified acrylate is prepared by the following method: acrylate is selected as the base material, acrylate and epoxy resin are added to a mixer, the mixer is set to 120 r / min and stirred for 6 minutes, then bismaleimide, aluminum oxide, graphene and polyurethane prepolymer are added, the mixer is set to 300 r / min and stirred for 10 minutes, the resulting product is added to an ultrasonic disperser, the power is set to 1000 W, the processing time is 4 minutes, and the resulting product is ultraviolet light cured to obtain the modified acrylate.

[0031] The mass of the epoxy resin is 20% of the mass of the acrylate, the mass of the graphene is 4% of the mass of the acrylate, and the mass of the polyurethane prepolymer is 4% of the mass of the acrylate.

[0032] The filler is prepared by the following method: modified basalt fiber, modified acrylic ester, aramid fiber, polyurethane and polyimide are added to a mixer, the mixer is set to 300 r / min and stirred for 20 minutes, the resulting product is sent to a muffle furnace, the heating rate is set to 8°C / min, the temperature is raised to 400°C, and the temperature is kept for 20 minutes, the resulting product is ground, and the ground particle size is 40 μm to obtain a filler.

[0033] Modified tetrapod-shaped zinc oxide whiskers were prepared by the following method: tetrapod-shaped zinc oxide whiskers were selected as the base material, the tetrapod-shaped zinc oxide whiskers and the mixture were added to a mixer, the mixer was set to 200 r / min and stirred for 10 minutes, the resulting product was sent to a muffle furnace, the heating rate was set to 10°C / min, the temperature was raised to 50°C, and the temperature was kept for 10 minutes, the resulting product was ground, and the ground particle size was 40 μm to obtain modified tetrapod-shaped zinc oxide whiskers.

[0034] The mixture is prepared by mixing tin powder, ammonia water and anhydrous ethanol, the mass ratio of tin powder, ammonia water and anhydrous ethanol is 1: (0.1): (0.6), and the mass concentration of ammonia water is 20%.

[0035] Alumina is selected to have nanoparticle size, with a particle size of 20nm.

[0036] A method for integrally forming a ceramic hollow air intake duct comprises the following steps:

[0037] S1: Mixing process: silicon nitride, magnesium oxide, filler, modified tetrapod-shaped zinc oxide whisker and lanthanum oxide are weighed as needed and added into a mixer. The mixer is set at 600 r / min and stirred for 20 minutes to obtain a powder;

[0038] S2: ball milling treatment, the powder and water are added to a ball mill for wet ball milling treatment for 4 hours to obtain a slurry, the slurry is filtered to obtain a solid, and the solid is sent to an oven at 60°C and dried for 1 hour to obtain a mud material;

[0039] S3: Sintering treatment: the clay is made into a hollow embryo through a mold, the hollow embryo is sent to a bisque firing furnace, set to 400℃ for pre-firing treatment for 1 hour, and then sent to a kiln, set to 1200℃ for sintering treatment for 1 hour to obtain a ceramic hollow air inlet duct.

[0040] Example 2:

[0041] The method comprises the following raw materials in parts by weight: 70 parts of silicon nitride, 5 parts of magnesium oxide, 5 parts of filler, 3 parts of silicon dioxide, 3 parts of modified tetrapod-shaped zinc oxide whiskers, 3 parts of aluminum oxide and 2 parts of lanthanum oxide;

[0042] The filler is composed of the following raw materials: modified basalt fiber, modified acrylate, aramid fiber, polyurethane and polyimide, and the mass ratio of the modified basalt fiber, modified acrylate, aramid fiber, polyurethane and polyimide is 4:1: (0.3): (0.5): (0.5).

[0043] The modified basalt fiber is prepared by the following method: basalt fiber is selected as a base material, the basalt fiber is immersed in an ethanol solution for ultrasonic cleaning, and after cleaning, the basalt fiber is added to a vacuum chamber of a plasma treatment equipment, and a mixed gas of equal amounts of nitrogen and oxygen is set to be introduced, the radio frequency power is 150W, and the treatment time is 4 minutes. The obtained product is immersed in a silane coupling agent-KH560, and is allowed to react at 55°C for 25 minutes. The obtained product is added to a mixer, silica is added to the mixer, and the mixer is set to 250r / min for stirring for 15 minutes. The obtained product is added to an oven and set to 250°C for treatment for 25 minutes to obtain the modified basalt fiber.

[0044] The mass concentration of the ethanol solution is 35%, and the mass concentration of the silane coupling agent-KH560 is 2%.

[0045] The modified acrylate is prepared by the following method: acrylate is selected as the base material, acrylate and epoxy resin are added to a mixer, the mixer is set to 140 r / min and stirred for 8 minutes, then bismaleimide, aluminum oxide, graphene and polyurethane prepolymer are added, the mixer is set to 350 r / min and stirred for 15 minutes, the resulting product is added to an ultrasonic disperser, the power is set to 1500 W, the processing time is 5 minutes, and the resulting product is ultraviolet light cured to obtain the modified acrylate.

[0046] The mass of the epoxy resin is 25% of the mass of the acrylate, the mass of the graphene is 5% of the mass of the acrylate, and the mass of the polyurethane prepolymer is 5% of the mass of the acrylate.

[0047] The filler is prepared by the following method: modified basalt fiber, modified acrylic ester, aramid fiber, polyurethane and polyimide are added to a mixer, the mixer is set to 350r / min and stirred for 25 minutes, the resulting product is sent to a muffle furnace, the heating rate is set to 10℃ / min, the temperature is raised to 450℃, and the temperature is kept for 25 minutes, the resulting product is ground, and the ground particle size is 50μm to obtain the filler.

[0048] Modified tetrapod-shaped zinc oxide whiskers were prepared by the following method: tetrapod-shaped zinc oxide whiskers were selected as the base material, the tetrapod-shaped zinc oxide whiskers and the mixture were added to a mixer, the mixer was set to 250 r / min and stirred for 15 minutes, the resulting product was sent to a muffle furnace, the heating rate was set to 15°C / min, the temperature was raised to 550°C, and the temperature was kept for 15 minutes, the resulting product was ground, and the ground particle size was 50 μm to obtain modified tetrapod-shaped zinc oxide whiskers.

[0049] The mixture is prepared by mixing tin powder, ammonia water and anhydrous ethanol, the mass ratio of tin powder, ammonia water and anhydrous ethanol is 1: (0.2): (0.7), and the mass concentration of ammonia water is 25%.

[0050] Alumina is selected to have nanoparticle size, with a particle size of 30nm.

[0051] A method for integrally forming a ceramic hollow air intake duct comprises the following steps:

[0052] S1: Mixing process: silicon nitride, magnesium oxide, filler, modified tetrapod-shaped zinc oxide whisker and lanthanum oxide are weighed as needed and added into a mixer. The mixer is set at 700 r / min and stirred for 25 minutes to obtain a powder;

[0053] S2: ball milling treatment, the powder and water are added to a ball mill for wet ball milling treatment for 5 hours to obtain a slurry, the slurry is filtered to obtain a solid, and the solid is sent to an oven at 70°C and dried for 2 hours to obtain a mud material;

[0054] S3: Sintering treatment: the clay is made into a hollow embryo through a mold, the hollow embryo is sent to a bisque firing furnace, set to 600℃ for pre-firing treatment for 2 hours, and then sent to a kiln, set to 1400℃ for sintering treatment for 2 hours to obtain a ceramic hollow air inlet duct.

[0055] Example 3:

[0056] The method comprises the following raw materials in parts by weight: 80 parts of silicon nitride, 6 parts of magnesium oxide, 6 parts of filler, 4 parts of silicon dioxide, 4 parts of modified tetrapod-shaped zinc oxide whiskers, 4 parts of aluminum oxide and 3 parts of lanthanum oxide;

[0057] The filler is composed of the following raw materials: modified basalt fiber, modified acrylate, aramid fiber, polyurethane and polyimide, and the mass ratio of the modified basalt fiber, modified acrylate, aramid fiber, polyurethane and polyimide is 4:1: (0.4): (0.6): (0.6).

[0058] The modified basalt fiber is prepared by the following method: basalt fiber is selected as a base material, the basalt fiber is immersed in an ethanol solution for ultrasonic cleaning, and after cleaning, the basalt fiber is added to a vacuum chamber of a plasma treatment equipment, and a mixed gas of equal amounts of nitrogen and oxygen is set to be introduced, the radio frequency power is 200W, and the treatment time is 5 minutes. The obtained product is immersed in a silane coupling agent-KH560, and is allowed to react at 60°C for 30 minutes. The obtained product is added to a mixer, silica is added to the mixer, and the mixer is set to 300r / min for stirring for 20 minutes. The obtained product is added to an oven, set to 300°C for treatment for 30 minutes, and thus the modified basalt fiber is obtained.

[0059] The mass concentration of the ethanol solution is 40%, and the mass concentration of the silane coupling agent-KH560 is 3%.

[0060] The modified acrylate is prepared by the following method: acrylate is selected as the base material, acrylate and epoxy resin are added to a mixer, the mixer is set to 160 r / min and stirred for 10 minutes, then bismaleimide, aluminum oxide, graphene and polyurethane prepolymer are added, the mixer is set to 400 r / min and stirred for 20 minutes, the resulting product is added to an ultrasonic disperser, the power is set to 2000 W, the processing time is 6 minutes, and the resulting product is ultraviolet light cured to obtain the modified acrylate.

[0061] The mass of the epoxy resin is 30% of the mass of the acrylate, the mass of the graphene is 6% of the mass of the acrylate, and the mass of the polyurethane prepolymer is 6% of the mass of the acrylate.

[0062] The filler is prepared by the following method: modified basalt fiber, modified acrylic ester, aramid fiber, polyurethane and polyimide are added to a mixer, the mixer is set to 400 r / min and stirred for 30 minutes, the resulting product is sent to a muffle furnace, the heating rate is set to 12°C / min, the temperature is raised to 500°C, and the temperature is kept for 30 minutes, the resulting product is ground, and the ground particle size is 60 μm to obtain the filler.

[0063] Modified tetrapod-shaped zinc oxide whiskers were prepared by the following method: tetrapod-shaped zinc oxide whiskers were selected as the base material, the tetrapod-shaped zinc oxide whiskers and the mixture were added to a mixer, the mixer was set to 300 r / min and stirred for 20 minutes, the resulting product was sent to a muffle furnace, the heating rate was set to 20°C / min, the temperature was raised to 600°C, and the temperature was kept for 20 minutes, the resulting product was ground, and the ground particle size was 60 μm to obtain modified tetrapod-shaped zinc oxide whiskers.

[0064] The mixture is prepared by mixing tin powder, ammonia water and anhydrous ethanol, the mass ratio of tin powder, ammonia water and anhydrous ethanol is 1: (0.3): (0.8), and the mass concentration of ammonia water is 30%.

[0065] Alumina is selected to have nanoparticle size, with a particle size of 40nm.

[0066] A method for integrally forming a ceramic hollow air intake duct comprises the following steps:

[0067] S1: Mixing process: silicon nitride, magnesium oxide, filler, modified tetrapod-shaped zinc oxide whisker and lanthanum oxide are weighed as needed and added into a mixer. The mixer is set at 800 r / min and stirred for 30 minutes to obtain a powder;

[0068] S2: ball milling treatment: the powder and water are added to a ball mill for wet ball milling treatment for 6 hours to obtain a slurry. The slurry is filtered to obtain a solid. The solid is sent to an oven at 80°C and dried for 3 hours to obtain a mud material.

[0069] S3: Sintering treatment: the clay is made into a hollow embryo through a mold, the hollow embryo is sent to a bisque firing furnace, set to 800℃ for pre-firing treatment for 3 hours, and then sent to a kiln, set to 1600℃ for sintering treatment for 3 hours to obtain a ceramic hollow air inlet duct.

[0070] Comparative Example 1: The difference between this comparative example and Example 1 is that in this comparative example, an equal amount of basalt fiber is used to replace the filler.

[0071] Comparative Example 2: The difference between this comparative example and Example 1 is that in this comparative example, an equal amount of tetrapod-shaped zinc oxide whiskers is used to replace the modified tetrapod-shaped zinc oxide whiskers.

[0072] Comparative Example 3: This comparative example differs from Example 1 in that: this comparative example does not contain modified tetrapod-shaped zinc oxide whiskers.

[0073] Comparative Example 4: This comparative example is different from Example 1 in that: this comparative example does not contain filler.

[0074] Performance test: The ceramic hollow air inlet ducts prepared in Example 1, Example 2, Example 3, Comparative Example 1, Comparative Example 2, Comparative Example 3 and Comparative Example 4 were subjected to performance tests, and the test data obtained are recorded in the following table:

[0075]

[0076] In the performance test, the ceramic hollow air inlet ducts prepared in Example 1, Example 2, Example 3, Comparative Example 1, Comparative Example 2, Comparative Example 3 and Comparative Example 4 were heated to 450° C. and then subjected to strength performance testing using the test method in ASTM C368-2016.

[0077] By comparing and analyzing the relevant data in the table, it can be seen that the ceramic hollow air intake duct prepared by the present invention not only has good strength properties, but also has excellent toughness. This shows that the integrated molding method of the ceramic hollow air intake duct provided by the present invention has a broader market prospect and is more suitable for promotion.

[0078] 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.

[0079] The preferred embodiments of the present invention disclosed above are intended only to help illustrate the present invention. These preferred embodiments do not exhaustively describe all details, nor do they limit the present invention to the specific embodiments described. Obviously, many modifications and variations are possible based on the content of this specification. These embodiments are selected and described in detail in this specification to better explain the principles and practical applications of the present invention, thereby enabling those skilled in the art to better understand and utilize the present invention. The present invention is limited only by the claims and their full scope and equivalents.

Claims

1. A ceramic hollow air inlet, characterized by: The method comprises the following raw materials in parts by weight: 60 to 80 parts of silicon nitride, 4 to 6 parts of magnesium oxide, 4 to 6 parts of filler, 2 to 4 parts of silicon dioxide, 2 to 4 parts of modified tetrapod-shaped zinc oxide whiskers, 2 to 4 parts of aluminum oxide and 1 to 3 parts of lanthanum oxide; The filler is composed of the following raw materials: modified basalt fiber, modified acrylic ester, aramid fiber, polyurethane and polyimide, and the mass ratio of the modified basalt fiber, modified acrylic ester, aramid fiber, polyurethane and polyimide is 4:1: (0.2-0.4): (0.4-0.6): (0.4-0.6); The modified basalt fiber is prepared by the following method: selecting basalt fiber as a base material, immersing the basalt fiber in an ethanol solution for ultrasonic cleaning, adding the basalt fiber after cleaning to a vacuum chamber of a plasma treatment device, setting the introduction of a mixed gas of equal amounts of nitrogen and oxygen, setting the radio frequency power to 100-200W, and treating for 3-5 minutes, immersing the resulting product in a silane coupling agent - KH560, and allowing the reaction to proceed at 50-60°C for 20-30 minutes, adding the resulting product to a mixer, adding silica to the mixer, setting the mixer to 200-300 r / min for stirring for 10-20 minutes, adding the resulting product to an oven, setting the temperature to 200-300°C for treatment for 20-30 minutes, and preparing the modified basalt fiber; The modified acrylate is prepared by the following method: selecting acrylate as a base material, adding acrylate and epoxy resin into a mixer, setting the mixer at 120-160 r / min and stirring for 6-10 minutes, then adding bismaleimide, aluminum oxide, graphene and polyurethane prepolymer, setting the mixer at 300-400 r / min and stirring for 10-20 minutes, adding the resulting product into an ultrasonic disperser, setting the power to 1000-2000 W, and treating for 4-6 minutes, and subjecting the resulting product to ultraviolet curing treatment to obtain the modified acrylate; The modified tetrapod-shaped zinc oxide whisker is prepared by the following method: tetrapod-shaped zinc oxide whisker is selected as a base material, the tetrapod-shaped zinc oxide whisker and a mixture are added to a mixer, the mixer is set to 200-300 r / min and stirred for 10-20 minutes, the obtained product is sent to a muffle furnace, the heating rate is set to 10-20°C / min, the temperature is raised to 500-600°C, and the temperature is kept for 10-20 minutes, and the obtained product is ground to a particle size of 40-60 μm to obtain the modified tetrapod-shaped zinc oxide whisker.

2. The ceramic hollow air inlet according to claim 1, characterized in that: The mass concentration of the ethanol solution is 30-40%, and the mass concentration of the silane coupling agent-KH560 is 1-3%.

3. The ceramic hollow air inlet according to claim 1, characterized in that: The mass of the epoxy resin is 20-30% of the mass of the acrylate, the mass of the graphene is 4-6% of the mass of the acrylate, and the mass of the polyurethane prepolymer is 4-6% of the mass of the acrylate.

4. The ceramic hollow air inlet according to claim 1, characterized in that: The filler is prepared by the following method: modified basalt fiber, modified acrylic ester, aramid fiber, polyurethane and polyimide are added to a mixer, the mixer is set to 300-400 r / min and stirred for 20-30 minutes, the obtained product is sent to a muffle furnace, the heating rate is set to 8-12°C / min, the temperature is raised to 400-500°C, and the temperature is kept for 20-30 minutes, the obtained product is ground, and the ground particle size is 40-60 μm to obtain the filler.

5. The ceramic hollow air inlet according to claim 1, characterized in that: The mixture is prepared by mixing tin powder, ammonia water and anhydrous ethanol. The mass ratio of the tin powder, ammonia water and anhydrous ethanol is 1: (0.1-0.3): (0.6-0.8), and the mass concentration of the ammonia water is 20-30%.

6. The ceramic hollow air inlet according to claim 1, characterized in that: The aluminum oxide is selected to have a nanoparticle size of 20 to 40 nm.

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