A Uniform Preparation Method for Curved Thermal Insulation Tiles

Abstract

This invention discloses a method for uniformly preparing curved heat-insulating tiles, belonging to the field of thermal protection material preparation technology. The method involves preparing a slurry from modified ceramic fibers, a modified sintering aid solution, a modified radiation-resistant agent solution, and a room-temperature binder. The slurry is then poured into a curved filter fixture to prepare a wet curved heat-insulating tile blank. This blank is then transferred to a drying tray conforming to its shape, wrapped with a plastic film, and placed in an oven for heating. After removing the plastic film, the blank is dried completely in the oven to obtain a dry curved heat-insulating tile blank. The dry blank is then transferred to a muffle furnace and fixed with a conforming high-temperature resistant ceramic clamp, undergoing stepped heating sintering to produce a curved heat-insulating tile with uniform strength.

Description

Technical Field

[0001] This invention belongs to the field of thermal protection material preparation technology, specifically relating to a uniform preparation method for curved heat insulation tiles. Background Technology

[0002] Ceramic thermal insulation tiles are rigid thermal insulation materials obtained through fiber filtration, forming, drying, and sintering. In most cases, flat thermal insulation tiles and components with small curvatures are machined from flat tiles. However, for curved thermal insulation tiles with large curvatures, if they are still machined from flat tile blanks, extremely thick flat tiles are required, leading to three problems: 1) Low raw material utilization, resulting in high manufacturing costs and failing to meet the low-cost manufacturing requirements of the desired model. 2) Because the flat tile blank also has good thermal insulation properties, it is prone to insufficient sintering due to excessive temperature differences between the inside and outside of the blank, making sintering control of thick thermal insulation tiles more difficult, resulting in lower product yield and increased manufacturing costs. 3) Inconsistent performance of curved thermal insulation tiles obtained from flat sheet processing. The fiber direction of curved thermal insulation tiles processed from flat sheet blanks cannot be guaranteed to be perpendicular to the normal of the curved surface, leading to performance differences in different areas of the curved thermal insulation tile.

[0003] The aforementioned problems can be effectively solved by forming curved heat insulation tiles. However, in the preparation of curved heat insulation tiles, existing commonly used curved forming tooling is used, and sintering aids are added directly to the heat insulation tile in powder or liquid form into the slurry. Due to density differences, the residual amount of sintering aids during filtration and drying is easily uncontrollable. This not only leads to uneven thickness gradient distribution, but also, during the drying process of the wet blank, the sintering aid powder inside the heat insulation tile will migrate to the surface of the heat insulation tile along with the liquid evaporation, resulting in uneven strength of the heat insulation tile, which is extremely technically challenging. Therefore, this invention provides a method for uniformly preparing curved heat insulation tiles. Summary of the Invention

[0004] The purpose of this invention is to provide a uniform preparation method for curved heat-insulating tiles to solve the above-mentioned technical problems.

[0005] To achieve the above objectives, the present invention adopts the following technical solution:

[0006] A method for uniformly preparing curved heat-insulating tiles includes the following steps:

[0007] 1) Slurry dispersion: Modified ceramic fiber, modified sintering aid solution, modified radiation-resistant agent solution, and room temperature adhesive are added to deionized water and dispersed evenly to obtain slurry;

[0008] 2) Forming: Pour the slurry obtained in step 1) into a curved surface filter fixture and perform vacuum filtration to form the curved surface heat insulation tile wet blank after filtering out the flowing deionized water.

[0009] 3) Drying: Transfer the wet blank of the curved heat insulation tile obtained in step 2) to a drying tray that conforms to its shape, then wrap the surface of the wet blank with plastic film, transfer it to an oven and heat it for a period of time, then take it out, remove the plastic film, and continue to dry it completely in the oven to obtain the dry blank of the curved heat insulation tile.

[0010] 4) Sintering: Transfer the curved heat insulation tile blank obtained in step 3) to a muffle furnace and fix it with a high-temperature resistant ceramic clamp that conforms to its shape. Perform step heating sintering and then let it cool naturally to room temperature before taking it out to obtain the curved heat insulation tile.

[0011] Furthermore, the preparation method of the modified ceramic fiber is as follows: silica sol and silica powder are ball-milled and mixed in a closed environment. After mixing, the mixture is uniformly sprayed onto the surface of the ceramic fiber and dried in situ. Then, a polymer organic solution is uniformly sprayed onto the surface of the ceramic fiber and dried in situ to obtain the modified ceramic fiber.

[0012] Furthermore, the mass ratio of silica sol to silica powder is (2-5):1.

[0013] Furthermore, the mass ratio of the polymeric organic material to the ceramic fiber ranges from (0.5 to 5):100.

[0014] Furthermore, the ceramic fiber includes, but is not limited to, one or any combination of quartz fiber, alumina fiber, zirconium oxide fiber, aluminum silicate fiber, mullite fiber, and high silica fiber, with a fiber diameter of 1 to 3 μm and a diameter length of 0.5 to 20 mm.

[0015] Further, the preparation method of the modified sintering aid solution is as follows: the sintering aid and the polymer organic solution are mixed by ball milling. After mixing, the mixture is poured into rapidly rotating and dispersed water to allow the solids in the mixture to precipitate in the water. After filtration and drying, a flocculent solid mixture is obtained. The flocculent solid mixture is further mixed with the modified aid and poured into a ball mill jar. Deionized water is added to the ball mill jar, and the mixture is ball milled at a speed of 60-100 r / min for 30-100 minutes. Then, the mixture is removed to obtain the modified sintering aid solution.

[0016] Furthermore, the mass of the modified sintering aid does not exceed 20% of the mass of the ceramic fiber.

[0017] Furthermore, the mass ratio of the polymeric organic compound to the sintering aid is in the range of (10-30):100.

[0018] Furthermore, the sintering aid includes, but is not limited to, one of boron nitride, boron carbide, silicon powder, or borosilicate glass powder.

[0019] Further, the preparation method of the modified anti-radiation agent solution is as follows: the anti-radiation agent and the polymer organic solution are mixed by ball milling. After mixing, the mixture is poured into rapidly rotating and dispersed water, so that the solids in the mixture precipitate out in the water. After filtration and drying, a flocculent solid mixture is obtained. The flocculent solid mixture is further mixed with the modifying agent, and deionized water is poured into the ball mill jar. The mixture is ball milled at a speed of 60-100 r / min for 30-100 minutes, and then taken out to obtain the modified anti-radiation agent solution.

[0020] Furthermore, the mass of the modified radiation-resistant agent does not exceed 35% of the mass of the ceramic fiber.

[0021] Furthermore, the mass ratio of the polymeric organic compound to the anti-radiation agent ranges from (10 to 30): 100.

[0022] Furthermore, the radiation-resistant agent includes, but is not limited to, one of titanium dioxide, potassium hexatitanate, silicon carbide, aluminum oxide, and chromium oxide.

[0023] Furthermore, the modifying agent is a surfactant, including but not limited to sodium dodecylbenzenesulfonate and ammonium dodecyl sulfate.

[0024] Furthermore, the aforementioned high molecular weight organic compound should meet the following conditions: it is insoluble in water and its elemental composition does not contain any metal elements.

[0025] Furthermore, the mass of the room temperature adhesive does not exceed 10% of the mass of the ceramic fiber.

[0026] Furthermore, the room-temperature adhesive includes, but is not limited to, one of sucrose and starch.

[0027] Furthermore, the curved surface filtration fixture is a well-known general-purpose fixture in the field of heat insulation tile preparation, comprising three parts: a slurry hopper, a curved surface filter screen at the bottom of the hopper, and a vacuum loading pipeline at the bottom of the filter screen.

[0028] Further, in step 3), after transferring the material to an oven at 80-90°C and heating for 10-30 minutes, remove it, remove the plastic film, and continue to dry it completely in an oven at 100-150°C to obtain the dry blank of the curved heat insulation tile.

[0029] Furthermore, the conditions for stepped heating sintering are as follows: heating to 500-800℃ at a heating rate of 2-5℃ / min, holding at that temperature for 1-5 hours, and then heating to 1000-1500℃ at a heating rate of 5-10℃ / min, holding at that temperature for 1-5 hours.

[0030] The beneficial effects achieved by this invention are as follows:

[0031] 1. By modifying ceramic fibers, uniform and firm sintering reaction sites can be provided on the surface of ceramic fibers. The density of ceramic fibers can also be reduced, so that the ceramic fibers can be suspended in the slurry for a longer time. This avoids uneven fiber distribution in the product due to excessively fast fiber settling or different settling speeds caused by different fiber densities.

[0032] 2. By modifying the sintering aids and radiation-resistant agents, the density of the sintering aids can be changed, allowing them to remain suspended in the slurry for a longer time. This density can be adjusted to be comparable to that of ceramic fibers, ensuring that the content of the sintering aids and radiation-resistant agents within the curved heat insulation tile is controllable and uniformly distributed. Furthermore, the state of the sintering aids and radiation-resistant agent powder particles can be altered, increasing their volume in water and preventing significant and uncontrollable loss during water filtration. This treatment method reduces the dispersion of the sintering aids and radiation-resistant agent powders in water, preventing some powder particles from agglomerating in water due to poor water wettability, which could further lead to uneven distribution within the curved heat insulation tile blank.

[0033] 3. The diameter and length of ceramic fibers can be adjusted arbitrarily. By controlling their diameter and length values, curved heat insulation tiles with different densities can be obtained. Attached Figure Description

[0034] Figure 1 This is a flowchart of a method for uniformly preparing curved heat-insulating tiles according to the present invention. Detailed Implementation

[0035] To make the various technical features, advantages, or effects of the present invention more apparent and understandable, a detailed description is provided below in conjunction with the accompanying drawings.

[0036] Example 1

[0037] 1) Slurry dispersion: Modified quartz fiber, modified boron nitride solution, modified silicon carbide solution, and starch are added to deionized water and dispersed evenly to obtain slurry; wherein the solid mass of modified boron nitride solution is 10% of the mass of quartz fiber, the solid mass of modified silicon carbide solution is 35% of the mass of quartz fiber, and the starch mass is 10% of the mass of quartz fiber.

[0038] The modified quartz fiber is prepared by ball milling silica sol and silica powder in a 2:1 mass ratio in a closed environment. After mixing, the mixture is uniformly sprayed onto the surface of quartz fibers with a diameter of 1-3 μm and a length of 5-20 mm. After in-situ drying, polyvinyl butyral solution is uniformly sprayed onto the surface of the quartz fibers, controlling the mass ratio of polyvinyl butyral to quartz fibers to be 0.5:100. After in-situ drying, the modified quartz fiber is obtained.

[0039] The modified boron nitride solution is prepared as follows: Boron nitride and polyvinyl butyral solution are mixed by ball milling, controlling the mass ratio of polyvinyl butyral to boron nitride to be 30:100. After mixing, the mixture is poured into rapidly rotating dispersed water, causing the solids in the mixture to precipitate in the water. After filtration and drying, a flocculent solid mixture is obtained. The flocculent solid mixture is then mixed with a surfactant and poured into a ball mill jar. Deionized water is introduced into the ball mill jar, and the mixture is ball-milled at 60 r / min for 100 minutes. The modified boron nitride solution is then obtained.

[0040] The modified silicon carbide solution is prepared by: mixing silicon carbide and polyvinyl butyral solution by ball milling, controlling the mass ratio of polyvinyl butyral to silicon carbide to be 10:100. After mixing, the mixture is poured into rapidly rotating and dispersed water, causing the solids in the mixture to precipitate in the water. After filtration and drying, a flocculent solid mixture is obtained. The flocculent solid mixture is further mixed with a surfactant, and deionized water is introduced into a ball mill jar. The mixture is ball-milled at 100 r / min for 30 minutes, and then removed to obtain the modified silicon carbide solution.

[0041] 2) Forming: Pour the slurry obtained in step 1) into the curved surface filter fixture, perform vacuum suction filtration and forming, and filter out the flowing deionized water to obtain the wet blank of the curved heat insulation tile.

[0042] 3) Drying: Transfer the wet blank of the curved heat insulation tile obtained in step 2) to a drying tray that conforms to its shape, then wrap the surface of the wet blank with a plastic film, transfer it to an oven at 80°C and heat for 30 minutes, remove the plastic film, and continue to dry it completely in an oven at 100°C to obtain the dry blank of the curved heat insulation tile.

[0043] 4) Sintering: Transfer the curved heat insulation tile blank obtained in step 3) to a muffle furnace and fix it with a high-temperature resistant ceramic clamp that conforms to its shape. Raise the temperature to 500°C at a heating rate of 2°C / min and hold for 5 hours. Then raise the temperature to 1000°C at a heating rate of 5°C / min and hold for 5 hours. Then let it cool to room temperature naturally and take it out to obtain the curved heat insulation tile.

[0044] The density of the prepared curved heat-insulating tile was tested to be 0.15 g / cm³. 3The room temperature compressive strength is greater than 0.8 MPa, the room temperature thermal conductivity is less than 0.045 W / (m·K), the density fluctuation of different regions of a single product is less than 3%, and the compressive strength fluctuation of different regions of a single product is less than 5%.

[0045] Example 2

[0046] 1) Slurry dispersion: Modified quartz fiber, modified boron carbide solution, modified chromium oxide solution, and starch are added to deionized water and dispersed evenly to obtain a slurry; wherein the solid mass of the modified boron carbide solution is 5% of the mass of the quartz fiber, the solid mass of the modified chromium oxide solution is 25% of the mass of the quartz fiber, and the starch mass is 5% of the mass of the quartz fiber.

[0047] The modified quartz fiber is prepared by ball milling silica sol and silica powder in a 3:1 mass ratio in a closed environment. After mixing, the mixture is uniformly sprayed onto the surface of quartz fibers with a diameter of 1-3 μm and a length of 0.5-2 mm. After in-situ drying, polyvinyl butyral solution is uniformly sprayed onto the surface of the quartz fibers, controlling the mass ratio of polyvinyl butyral to quartz fibers to be 5:100. After in-situ drying, the modified quartz fiber is obtained.

[0048] The modified boron carbide solution is prepared as follows: Boron carbide and polyvinyl butyral solution are mixed by ball milling, controlling the mass ratio of polyvinyl butyral to boron carbide to be 10:100. After mixing, the mixture is poured into rapidly rotating dispersed water, causing the solids in the mixture to precipitate in the water. After filtration and drying, a flocculent solid mixture is obtained. The flocculent solid mixture is then mixed with a surfactant and poured into a ball mill jar. Deionized water is introduced into the ball mill jar, and the mixture is ball-milled at 100 r / min for 30 minutes. The modified boron carbide solution is then obtained.

[0049] The modified chromium oxide solution is prepared as follows: chromium oxide and polyvinyl butyral solution are mixed by ball milling, controlling the mass ratio of polyvinyl butyral to chromium oxide to be 30:100. After mixing, the mixture is poured into rapidly rotating and dispersed water, causing the solids in the mixture to precipitate in the water. After filtration and drying, a flocculent solid mixture is obtained. The flocculent solid mixture is further mixed with a surfactant, and deionized water is introduced into a ball mill jar. The mixture is ball-milled at 60 r / min for 100 minutes, and then removed to obtain the modified chromium oxide solution.

[0050] 2) Forming: Pour the slurry obtained in step 1) into the curved surface filter fixture, perform vacuum suction filtration and forming, and filter out the flowing deionized water to obtain the wet blank of the curved heat insulation tile.

[0051] 3) Drying: Transfer the wet blank of the curved heat insulation tile obtained in step 2) to a drying tray that conforms to its shape, then wrap the surface of the wet blank with a plastic film, transfer it to an oven at 90°C and heat for 10 minutes, remove the plastic film, and continue to dry it completely in an oven at 150°C to obtain the dry blank of the curved heat insulation tile.

[0052] 4) Sintering: Transfer the curved heat insulation tile blank obtained in step 3) to a muffle furnace and fix it with a high-temperature resistant ceramic clamp that conforms to its shape. Raise the temperature to 800°C at a heating rate of 5°C / min and hold for 1 hour. Then raise the temperature to 1500°C at a heating rate of 10°C / min and hold for 3 hours. Then let it cool naturally to room temperature and take it out to obtain the curved heat insulation tile.

[0053] The density of the prepared curved heat-insulating tile was tested to be 0.25 g / cm³. 3 The room temperature compressive strength is greater than 2.0 MPa, the room temperature thermal conductivity is less than 0.048 W / (m·K), the density fluctuation of different regions of a single product is less than 3%, and the compressive strength fluctuation of different regions of a single product is less than 5%.

[0054] Example 3

[0055] 1) Slurry dispersion: Modified alumina fiber, modified quartz fiber, modified boron nitride solution, modified silicon carbide solution, and starch are added to deionized water and dispersed evenly to obtain a slurry; wherein the mass ratio of modified alumina fiber to modified quartz fiber is 1:2; the solid mass in the modified boron nitride solution is 20% of the total mass of quartz fiber and alumina fiber, the solid mass in the modified silicon carbide solution is 10% of the total mass of quartz fiber and alumina fiber, and the starch mass is 5% of the total mass of quartz fiber and alumina fiber.

[0056] The preparation method of modified quartz fiber and modified alumina is as follows: Silica sol and silica powder are ball-milled and mixed in a closed environment at a mass ratio of 5:1. After mixing, the mixture is uniformly sprayed onto the surface of quartz fiber with a diameter of 1-3 μm and a length of 5-10 mm and alumina fiber with a diameter of 3-5 μm and a length of 5-10 mm. After in-situ drying, polyvinyl butyral solution is uniformly sprayed onto the surface of quartz fiber and alumina fiber. The mass ratio of polyvinyl butyral to quartz fiber and alumina fiber is controlled to be 3:100. After in-situ drying, modified quartz fiber and modified alumina fiber are obtained.

[0057] The modified boron nitride solution is prepared as follows: Boron nitride and polyvinyl butyral solution are mixed by ball milling, controlling the mass ratio of polyvinyl butyral to boron nitride to be 20:100. After mixing, the mixture is poured into rapidly rotating dispersed water, causing the solids in the mixture to precipitate in the water. After filtration and drying, a flocculent solid mixture is obtained. The flocculent solid mixture is further mixed with a surfactant and poured into a ball mill jar. Deionized water is introduced into the ball mill jar, and the mixture is ball-milled at 80 r / min for 80 minutes. The modified boron nitride solution is then obtained.

[0058] The modified silicon carbide solution is prepared as follows: silicon carbide and polyvinyl butyral solution are mixed by ball milling, and the mass ratio of polyvinyl butyral to silicon carbide is controlled at 15:100. After mixing, the mixture is poured into rapidly rotating and dispersed water to allow the solids in the mixture to precipitate in the water. After filtration and drying, a flocculent solid mixture is obtained. The flocculent solid mixture is further mixed with a surfactant, and deionized water is introduced into a ball mill jar. The mixture is ball-milled at 80 r / min for 60 minutes, and then removed to obtain the modified silicon carbide solution.

[0059] 2) Forming: Pour the slurry obtained in step 1) into the curved surface filter fixture, perform vacuum suction filtration and forming, and filter out the flowing deionized water to obtain the wet blank of the curved heat insulation tile.

[0060] 3) Drying: Transfer the wet blank of the curved heat insulation tile obtained in step 2) to a drying tray that conforms to its shape, then wrap the surface of the wet blank with a plastic film, transfer it to an oven at 85°C and heat for 20 minutes, remove the plastic film, and continue to dry it completely in an oven at 130°C to obtain the dry blank of the curved heat insulation tile.

[0061] 4) Sintering: Transfer the curved heat insulation tile blank obtained in step 3) to a muffle furnace and fix it with a high-temperature resistant ceramic clamp that conforms to its shape. Raise the temperature to 700°C at a heating rate of 3°C / min and hold for 3 hours. Then raise the temperature to 1300°C at a heating rate of 7°C / min and hold for 1 hour. Then let it cool naturally to room temperature and take it out to obtain the curved heat insulation tile.

[0062] The density of the prepared curved heat-insulating tile was tested to be 0.20 g / cm³. 3 The room temperature compressive strength is greater than 1.3 MPa, the room temperature thermal conductivity is less than 0.055 W / (m·K), the density fluctuation of different regions of a single product is less than 3%, and the compressive strength fluctuation of different regions of a single product is less than 5%.

[0063] Comparative Example 1

[0064] Weigh out the same amount of quartz fiber, alumina fiber, boron nitride powder, silicon carbide powder, and starch as in Example 3, and add them to the same amount of water as in step 1) for uniform dispersion. After dispersion, pour the mixture into the same filter mold as in step 2) of Example 3 to remove water. Then, take out the wet blank of the curved heat insulation tile and dry it completely in an oven at 150°C on the same drying tray as in step 3) of Example 3 to obtain the dry blank of the curved heat insulation tile. Then, sinter it using the same sintering process as in step 4) of Example 3, and fix it with a high-temperature resistant ceramic clamp that conforms to its shape. Raise the temperature to 700°C at a heating rate of 3°C / min, hold it for 3 hours, then raise the temperature to 1300°C at a heating rate of 7°C / min, hold it for 5 hours, and then let it cool naturally to room temperature to obtain the curved heat insulation tile prepared by conventional methods.

[0065] The density of the prepared curved heat-insulating tile was tested to be 0.20 g / cm³. 3 The room temperature compressive strength is less than 0.8 MPa, the room temperature thermal conductivity is less than 0.057 W / (m·K), the density fluctuation of different areas of a single product is greater than 10%, and the compressive strength fluctuation of different areas of a single product is greater than 15%.

[0066] Although the present invention has been disclosed above with reference to embodiments, it is not intended to limit the present invention. Appropriate modifications or equivalent substitutions made by those skilled in the art to the technical solutions of the present invention should be covered within the protection scope of the present invention, which is defined by the claims.

Claims

1. A method for uniformly preparing curved heat-insulating tiles, characterized in that, Includes the following steps: 1) Modified ceramic fibers, modified sintering aid solution, modified radiation-resistant agent solution, and room-temperature adhesive are added to deionized water and dispersed evenly to obtain a slurry; the modified sintering aid solution is prepared by: mixing the sintering aid with a polymer organic solution using ball milling; after mixing, the mixture is poured into rapidly rotating dispersed water to allow the solids in the mixture to precipitate in the water; after filtration and drying, a flocculent solid mixture is obtained; the flocculent solid mixture is further mixed with the modified aid, and then poured... The mixture is placed in a ball mill jar, deionized water is added, and the mixture is ball milled at 60-100 r / min for 30-100 minutes. The mixture is then removed to obtain the modified sintering aid solution. The mass ratio of the polymeric organic compound to the sintering aid is (10-30):

100. The polymeric organic compound is insoluble in water and its elemental composition does not contain any metal elements. The mass of the modified sintering aid does not exceed 20% of the mass of the ceramic fiber. The sintering aid includes one of boron nitride, boron carbide, silicon powder, or borosilicate glass powder. The modified radiation-resistant agent solution is prepared as follows: the radiation-resistant agent and a polymeric organic solution are mixed by ball milling. After mixing, the mixture is poured into rapidly rotating and dispersed water, causing the solids in the mixture to precipitate in the water. After filtration and drying, a flocculent solid mixture is obtained. The flocculent solid mixture is further mixed with a modifying agent, and deionized water is poured into a ball mill jar. The mixture is ball-milled at 60-100 r / min for 30-100 minutes, and then removed to obtain the modified radiation-resistant agent solution. The mass ratio of the polymeric organic to the radiation-resistant agent is (10-30):

100. The polymeric organic is insoluble in water and its elemental composition does not contain any metal elements. The mass of the modified radiation-resistant agent does not exceed 35% of the mass of the ceramic fiber. The radiation-resistant agent includes one of titanium dioxide, potassium hexatitanate, silicon carbide, alumina, and chromium oxide. 2) Pour the slurry obtained in step 1) into the curved surface filter fixture, perform vacuum suction filtration and forming, and filter out the flowing deionized water to obtain the wet blank of the curved heat insulation tile. 3) Transfer the wet blank of the curved heat insulation tile obtained in step 2) to a drying tray that conforms to its shape, then wrap the surface of the wet blank with plastic film, transfer it to the oven and heat it for a period of time, take it out, remove the plastic film, and continue to dry it completely in the oven to obtain the dry blank of the curved heat insulation tile. 4) Transfer the curved heat insulation tile blank obtained in step 3) to a muffle furnace and fix it with a high-temperature resistant ceramic clamp that conforms to its shape. Perform step heating and sintering, and then let it cool naturally to room temperature before taking it out to obtain the curved heat insulation tile.

2. The preparation method according to claim 1, characterized in that, The modified ceramic fiber is prepared by ball milling silica sol and silica powder in a closed environment. After mixing, the mixture is uniformly sprayed onto the surface of the ceramic fiber and dried in situ. Then, a polymer organic solution is uniformly sprayed onto the surface of the ceramic fiber and dried in situ to obtain the modified ceramic fiber.

3. The preparation method according to claim 2, characterized in that, The mass ratio of the silica sol to the silica powder is (2~5):1; The mass ratio of the polymeric organic material to the ceramic fiber ranges from (0.5 to 5):100; The ceramic fiber includes one or any combination of quartz fiber, alumina fiber, zirconium oxide fiber, aluminum silicate fiber, mullite fiber, and high silica fiber, with a fiber diameter of 1~3μm and a diameter length of 0.5~20mm. The aforementioned high molecular weight organic compound should meet the following conditions: it is insoluble in water and its elemental composition does not contain any metal elements.

4. The preparation method according to claim 1, characterized in that, The modifying agent is a surfactant, including sodium dodecylbenzenesulfonate and ammonium dodecyl sulfate.

5. The preparation method according to claim 1, characterized in that, The mass of the room-temperature adhesive shall not exceed 10% of the mass of the ceramic fiber; The room-temperature adhesive includes one of sucrose and starch.

6. The preparation method according to claim 1, characterized in that, After transferring the material to an oven at 80-90℃ and heating for 10-30 minutes in step 3), remove it, remove the plastic film, and continue to dry it completely in an oven at 100-150℃ to obtain the dry blank of the curved heat insulation tile.

7. The preparation method according to claim 1, characterized in that, The conditions for stepped heating sintering are as follows: heat the temperature to 500-800℃ at a heating rate of 2-5℃ / min, hold for 1-5 hours, then heat the temperature to 1000-1500℃ at a heating rate of 5-10℃ / min, and hold for 1-5 hours.

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