Integrated intelligent post-processing method for glue discharging and sintering of photocuring formed ceramic

Abstract

The invention belongs to the related technical field of photocuring forming, and discloses a photocuring forming ceramic glue discharging and sintering integrated intelligent post-processing method. According to the method, a biscuit formed through photocuring is put into a glue discharging and sintering integrated furnace, the ceramic powder type and the resin type in the biscuit are input, and the glue discharging and sintering integrated furnace automatically generates a glue discharging and sintering integrated post-processing program based on a built-in resin thermal decomposition characteristic temperature database and a built-in ceramic phase change temperature database; vacuum pumping, inert gas backfilling, air replacement and heating and heat preservation processes under the protection of specific gas are sequentially completed in the same furnace chamber, and midway cooling or green body transferring is not needed. Compared with a traditional glue discharging and sintering method which depends on manual experience to set process parameters, the glue discharging and sintering method can adapt to different resin systems and ceramic powder systems, the optimal glue discharging and sintering curve is automatically generated, glue discharging thoroughness and sintering density are improved, green body cracking and air holes are avoided, the technological process is simplified, and the production efficiency is remarkably improved.

Description

Technical Field

[0001] This invention belongs to the technical field of photocuring molding, and more specifically, relates to an intelligent post-processing method for photocuring molded ceramics that integrates debinding and sintering. Background Technology The traditional resin removal and sintering process for photocurable ceramics mainly involves two basic steps: first, low-temperature heat treatment in a tube furnace, box furnace, or vacuum furnace to remove resin, and then transferring it to a high-temperature sintering furnace for densification. Additive Manufacturing 2021, 48 , 102423). This step-by-step process has the following shortcomings: the process is complicated: (1) the billet needs to be transferred between different furnaces, which not only increases the difficulty of operation and process cycle, but also easily leads to damage, cracking or even scrapping of the billet; (2) incomplete glue removal: the resin will decompose and produce gas during the heating process. If the temperature is not properly controlled during the glue removal stage, it is very easy to cause excessive gas pressure inside the billet, thereby producing defects such as cracks, warping or holes. Additive Manufacturing 2025, 109 , 104873); (3) Limited atmosphere switching: Existing equipment lacks flexibility in atmosphere control. The atmosphere can usually be changed after the furnace temperature drops, making it difficult to balance the optimal atmosphere environment for debinding and sintering; (4) Parameters cannot be adaptive: Different ceramic powders and different photosensitive resins have different temperature curves and atmosphere requirements for debinding and sintering. Traditional processes usually rely on manual experience to set the heating rate and holding point, lacking intelligent control, making it difficult to ensure the consistency of complex systems and high yield. (5) Energy consumption and efficiency issues: The billet is repeatedly heated and cooled in multiple furnaces, which not only consumes a lot of energy but also has low production efficiency, making it unsuitable for batch and large-scale applications.

[0002] Therefore, there is an urgent need to design an intelligent post-processing method that integrates debinding and sintering of photocurable ceramics to improve upon the shortcomings of the existing technologies. Summary of the Invention

[0003] In response to the above-mentioned defects or improvement needs of existing technologies, this invention provides an intelligent post-processing method integrating debinding and sintering of photocurable ceramics, thereby solving the technical problems existing in the debinding and sintering processes of photocurable ceramics, such as complex procedures, incomplete debinding, easy cracking of the green body, inflexible atmosphere control, and reliance on manual experience for process parameters.

[0004] To achieve the above objectives, according to one aspect of the present invention, an integrated intelligent post-processing method for photocurable ceramic debinding and sintering is provided, comprising the following steps: S1. Place the photocurable preform into the debinding and sintering integrated furnace, input the type of ceramic powder and resin in the photocurable preform, and the debinding and sintering integrated furnace intelligently generates the debinding and sintering integrated molding program. S2. The debinding and sintering integrated furnace is evacuated and backfilled with inert gas. The temperature is gradually increased according to the debinding and sintering integrated forming procedure in step S1, and the temperature is maintained at the organic matter decomposition temperature until the organic matter is completely decomposed and removed, thus completing the first stage of debinding. S3. After the heat preservation in step S2 is completed, air is introduced into the debinding and sintering integrated furnace. The temperature is gradually increased and maintained according to the debinding and sintering integrated forming procedure in step S1 until all carbon is completely removed, thus completing the second stage of debinding. The debinding stage is now complete. S4. After the heat preservation in step S3 is completed, the debinding and sintering integrated furnace is evacuated and backfilled with a specific gas. Then, according to the debinding and sintering integrated forming procedure in step S1, the temperature is gradually raised to the preset temperature and kept at that temperature until the debinding green body is sintered and formed. The specific gas is selected from one of air, nitrogen, carbon monoxide, carbon dioxide, hydrogen or inert gas. S5. After the heat preservation in step S4 is completed, the temperature is gradually reduced to room temperature according to the debinding and sintering integrated forming process in step S1 to obtain the sintered ceramic.

[0005] Preferably, the debinding and sintering integrated furnace includes a furnace body heating module, a vacuum system module, a gas input / output module, a multi-point temperature detection module, a PLC control module, and a process program execution module; The process execution module automatically generates an integrated debinding and sintering process program by calling the built-in database based on the input ceramic powder type and resin type, and then sends the process program to the PLC control module. The PLC control module is connected to the furnace body heating module, vacuum system module, gas input / output module and multi-point temperature detection module respectively, and is used to control the furnace body heating module to complete the heating, heat preservation and cooling steps according to the process program. The vacuum system module is used to perform vacuuming and pressure stabilization operations, control the gas input and output module to realize the automatic switching of debinding atmosphere, air atmosphere and sintering atmosphere, and receive real-time temperature feedback from the multi-point temperature detection module to perform closed-loop regulation of the heating process. The multi-point temperature detection module is used to monitor the temperature at multiple locations within the furnace cavity and return the monitoring data to the PLC control module and the process program execution module to determine whether each process stage has met the set conditions. The vacuum system module and the gas input / output module together constitute the furnace cavity atmosphere control unit, which realizes vacuuming, gas replenishment, and atmosphere switching under the scheduling of the PLC control module, thereby enabling the debinding and sintering integrated furnace to automatically complete the entire process of debinding and sintering within the same furnace cavity according to the process program. Preferably, the debinding and sintering integrated furnace further includes a display screen module, which is connected to the process execution module and is used to display the real-time temperature curve, atmosphere status and program execution steps.

[0006] Preferably, in step S1, the process execution module of the debinding and sintering integrated furnace has a built-in database of resin thermal decomposition characteristic temperatures and a database of ceramic phase transition temperatures. Based on the input ceramic powder type and resin type, it directly generates the corresponding holding temperature point, heating rate, and recommended atmosphere to achieve full-process control of debinding and sintering. The data in the resin thermal decomposition characteristic temperature database comes from the decomposition temperature range obtained by thermogravimetric analysis (TGA) and differential scanning calorimetry (DSC) tests of the resin system; the data in the ceramic phase transition temperature database comes from sintering experimental data of ceramic materials, phase transition test data, and phase transition temperature ranges in existing published literature.

[0007] Preferably, in step S1, the ceramic particles in the photocured green body are one or more of the following: alumina, silicon oxide, zirconium oxide, titanium oxide, magnesium oxide, yttrium oxide, barium titanate, silicon nitride, boron nitride, aluminum nitride, boron carbide, silicon carbide, kaolin, mullite, spinel, hydroxyapatite, tricalcium phosphate, and perovskite oxides.

[0008] Preferably, in step S1, the resin in the photocurable preform is one or more of styrene, vinyl acetate, N-vinylpyrrolidone, glycidyl methacrylate, triethylene glycol divinyl acid, 1,4-cyclohexyldimethyl divinyl aldehyde, 4-hydroxybutyl vinyl acid, glyceryl carbonate propylene ester, dodecyl vinyl acid, isobornyl methacrylate, triethylene glycol diacrylate, 1,6-hexanediol diacrylate, trimethylolpropane triacrylate, and pentaerythritol tetraacrylate.

[0009] Preferably, the cooling rate in step S5 is set by the process program, either by natural cooling after the heating process stops, or by introducing air, nitrogen, or argon to accelerate cooling.

[0010] According to another aspect of the present invention, a photocurable ceramic prepared by the above method is provided.

[0011] In summary, compared with the prior art, the intelligent post-processing method for photocurable ceramic debinding and sintering provided by the present invention has the following advantages: 1. Automated Generation of Debinding and Sintering Process: This invention can automatically generate optimal debinding and sintering process parameters based on the characteristics of different ceramic powders and photosensitive resins, including temperature profiles, heating and cooling rates, atmosphere type, and holding time. This intelligent control significantly improves the thoroughness of debinding and sintering density, avoids the limitations of relying on manual experience, and enhances product consistency and yield.

[0012] 2. Continuous Integrated Process: This invention enables a continuous process from low-temperature debinding to high-temperature sintering within the same debinding and sintering furnace, avoiding the complex operation of multiple green body transfers required in existing technologies, and reducing the risk of green body damage, cracking, and porosity. This process significantly improves production efficiency, reduces energy consumption, and simplifies the production process, making it suitable for large-scale industrial applications.

[0013] 3. Intelligent Atmosphere Switching and Temperature Control: This invention enables automatic atmosphere switching (such as vacuum, air, inert gas, etc.) without cooling, ensuring thorough binder removal and stable sintering. Compared to existing processes that require atmosphere switching after cooling, this invention improves the flexibility of atmosphere control and optimizes sintering quality.

[0014] 4. Adaptability to various ceramic systems: This invention is applicable to the production of various oxide and non-oxide ceramic systems, and can meet the debinding and sintering requirements of different types of ceramic materials. Its flexibility makes it have broad application potential in scientific research and industrial production.

[0015] 5. Reduced Equipment and Labor Costs: Through integrated design, this invention reduces the need for multiple devices and manual intervention, thereby lowering equipment investment and manual operation costs. Furthermore, automated and intelligent control reduces energy consumption and waste of production resources.

[0016] 6. Improved Product Quality and Consistency: This invention ensures higher quality standards for ceramic products by precisely controlling parameters such as temperature, heating / cooling rate, and atmosphere during the debinding and sintering processes. Optimized process control reduces quality fluctuations caused by over-processing or improper operation, thereby increasing the yield. Attached Figure Description

[0017] Figure 1 This is a flowchart of an intelligent post-processing method for photocurable ceramic debinding and sintering integrated according to the present invention; Figure 2 This is a silicon nitride (Si3N4) ceramic sample prepared in Example 1 of the present invention; Figure 3 This is the alumina (Al2O3) ceramic sample prepared in Example 2 of this invention; Figure 4This is a zirconium oxide (ZrO2) ceramic sample prepared in Example 3 of the present invention. Detailed Implementation

[0018] To make the objectives, technical solutions, and advantages of this invention clearer, the invention will be further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative and not intended to limit the invention. Furthermore, the technical features involved in the various embodiments of this invention described below can be combined with each other as long as they do not conflict with each other.

[0019] Please see Figure 1 This invention relates to an intelligent post-processing method integrating debinding and sintering of photocurable ceramics. It enables continuous debinding and sintering within the same equipment, and uses intelligent program control to manage heating and cooling rates, holding time, and atmosphere switching. The process program execution module of the debinding and sintering furnace can retrieve the corresponding sintering temperature zone from a built-in database based on the ceramic type, and combine it with the holding point and holding time matched to the resin type to generate a program. For multi-ceramic composite systems, the holding point and holding time are automatically adjusted according to the main phase weight, thereby improving the density and yield of ceramic products and reducing production energy consumption. This method is suitable for mass production of various ceramic systems and photosensitive resin systems. It achieves intelligent decision-making of process parameters through database retrieval and rule matching, requiring no manual intervention. The present invention provides an integrated intelligent post-processing method for photocurable ceramic debinding and sintering, comprising the following steps: S1. Place the photocured green body into the debinding and sintering integrated furnace, input the type of ceramic powder and resin in the photocured green body, and the debinding and sintering integrated furnace will intelligently generate the debinding and sintering integrated forming program. S2. Vacuum the debinding and sintering integrated furnace and backfill it with inert gas. Gradually increase the temperature according to the debinding and sintering integrated forming procedure in step S1, and keep it at the organic matter decomposition temperature until the organic matter is completely decomposed and removed, thus completing the first stage of debinding. S3. After the heat preservation in step S2 is completed, air is introduced into the debinding and sintering integrated furnace. The temperature is gradually increased and maintained according to the debinding and sintering integrated forming procedure in step S1 until all carbon is completely removed, thus completing the second stage of debinding and ending the debinding stage. S4. After the heat preservation in step S3 is completed, the debinding and sintering integrated furnace is evacuated and backfilled with a specific gas. Then, according to the debinding and sintering integrated forming procedure in step S1, the temperature is gradually raised to the preset temperature and kept at that temperature until the debinding green body is sintered and formed. The specific gas is selected from one of air, nitrogen, carbon monoxide, carbon dioxide, hydrogen or inert gas. S5. After the heat preservation in step S4 is completed, the temperature is gradually reduced to room temperature according to the debinding and sintering integrated forming process in step S1 to obtain the sintered ceramic.

[0020] Specifically, the debinding and sintering integrated furnace includes a furnace body heating module, a vacuum system module, a gas input and output module, a multi-point temperature detection module, a PLC control module, and a process program execution module; The process execution module automatically generates an integrated debinding and sintering process program by calling the built-in database based on the input ceramic powder type and resin type, and then sends the process program to the PLC control module. The PLC control module is connected to the furnace heating module, vacuum system module, gas input / output module and multi-point temperature detection module respectively, and is used to control the furnace heating module to complete the heating, heat preservation and cooling steps according to the process program. The vacuum system module is used to perform vacuuming and pressure stabilization operations, control the gas input and output module to realize the automatic switching of the debinding atmosphere, air atmosphere and sintering atmosphere, and receive real-time temperature feedback from the multi-point temperature detection module to perform closed-loop regulation of the heating process. The multi-point temperature detection module is used to monitor the temperature at multiple locations within the furnace cavity and return the monitoring data to the PLC control module and the process program execution module to determine whether the set conditions have been met at each process stage. The vacuum system module and the gas input / output module together constitute the furnace cavity atmosphere control unit, which realizes vacuuming, gas replenishment, and atmosphere switching under the scheduling of the PLC control module, so that the debinding and sintering integrated furnace can automatically complete the entire process of debinding and sintering in the same furnace cavity according to the process program. Specifically, the debinding and sintering integrated furnace also includes a display module, which is connected to the process program execution module to display real-time temperature curves, atmosphere status, and program execution steps.

[0021] Specifically, in step S1, the process execution module of the debinding and sintering integrated furnace has a built-in database of resin thermal decomposition characteristic temperatures and a database of ceramic phase transformation temperatures. Based on the input ceramic powder type and resin type, it directly generates the corresponding holding temperature point, heating rate, and recommended atmosphere to achieve full-process control of debinding and sintering. The data in the resin thermal decomposition characteristic temperature database comes from the decomposition temperature range obtained from thermogravimetric analysis (TGA) and differential scanning calorimetry (DSC) tests of the resin system; the data in the ceramic phase transformation temperature database comes from sintering experimental data of ceramic materials, phase transformation test data, and phase transformation temperature ranges in existing published literature.

[0022] Specifically, in step S1, the ceramic particles in the photocured green body are one or more of the following: alumina, silicon oxide, zirconium oxide, titanium oxide, magnesium oxide, yttrium oxide, barium titanate, silicon nitride, boron nitride, aluminum nitride, boron carbide, silicon carbide, kaolin, mullite, spinel, hydroxyapatite, tricalcium phosphate, and perovskite oxides.

[0023] Specifically, in step S1, the resin in the photocured preform is one or more of styrene, vinyl acetate, N-vinylpyrrolidone, glycidyl methacrylate, triethylene glycol divinyl acid, 1,4-cyclohexyldimethyl divinyl aldehyde, 4-hydroxybutyl vinyl acid, glyceryl carbonate propylene ester, dodecyl vinyl acid, isobornyl methacrylate, triethylene glycol diacrylate, 1,6-hexanediol diacrylate, trimethylolpropane triacrylate, and pentaerythritol tetraacrylate.

[0024] The following are specific examples: Example 1 S1: Place the photocured green body into the debinding and sintering integrated furnace. The ceramic powder types input into the green body are: silicon nitride (Si3N4), alumina (Al2O3) and yttrium oxide (Y2O3), and the resin types are: 1,6-hexanediol diacrylate (HDDA) and ethoxytrimethylolpropane triacrylate (TMP3EOTA). The process execution module of the debinding and sintering integrated furnace has a built-in database that directly generates the corresponding debinding and sintering curves based on the input ceramic powder type and resin type: Under argon atmosphere, the temperature is increased from room temperature to 200℃ at 5℃ / min and held for 1 hour, then increased to 350℃ at 0.5℃ / min and held for 2 hours, then increased to 600℃ at 0.5℃ / min and held for 1 hour, then switched to air atmosphere and increased from 600℃ to 800℃ at 5℃ / min and held for 2 hours, then switched to nitrogen atmosphere and increased from 800℃ to 1800℃ at 5℃ / min and held for 2 hours, and then cooled down with the furnace.

[0025] S2: The debinding and sintering integrated furnace is evacuated and argon gas is returned. The temperature is gradually increased according to the program generated in S1, and the temperature is held at the organic matter decomposition temperature points of 200℃, 350℃ and 550℃ respectively. S3: After the S2 heat preservation is completed, the debinding and sintering integrated furnace is evacuated, the air atmosphere is replaced, and the temperature is gradually increased to 600℃ and kept at that temperature for 2 hours according to the procedure generated in the first step. S4: After the S3 heat preservation is completed, the debinding and sintering integrated furnace is evacuated and backfilled with nitrogen. The temperature is gradually raised to 1800℃ and kept at that temperature for 2 hours according to the procedure generated in the first step. S5: After the S4 heat preservation ends, the furnace is cooled to room temperature.

[0026] Please refer to the silicon nitride (Si3N4) ceramic samples after debinding and sintering. Figure 2 The sample was intact, without cracks, warping, or holes.

[0027] Example 2 S1: Place the photocured green body into the debinding and sintering integrated furnace. Input the ceramic powder type in the green body: alumina (Al2O3), and the resin type: 1,6-hexanediol diacrylate (HDDA) and polyethylene glycol diacrylate (PEGDA). The debinding and sintering integrated furnace process program execution module's built-in database directly generates the corresponding debinding and sintering curve based on the input ceramic powder type and resin type: Under argon atmosphere, increase from room temperature to 391℃ at 5℃ / min, hold for 1 hour, then increase to 430℃ at 0.5℃ / min, hold for 2 hours, then increase to 600℃ at 0.5℃ / min, hold for 1 hour, then switch to air atmosphere, increase from 600℃ to 800℃ at 5℃ / min, hold for 2 hours, then increase from 800℃ to 1550℃ at 5℃ / min, hold for 2 hours, and then cool down with the furnace.

[0028] S2: The debinding and sintering integrated furnace is evacuated and argon gas is returned. The temperature is gradually increased according to the program generated in S1, and the temperature is held at the organic matter decomposition temperature points of 391℃, 430℃ and 600℃ respectively. S3: After the S2 heat preservation is completed, the debinding and sintering integrated furnace is evacuated, the air atmosphere is replaced, and the temperature is gradually increased to 800℃ according to the program generated in S1 and kept at that temperature for 2 hours. S4: After the heat preservation in S3 is completed, the debinding and sintering integrated furnace continues to maintain an air atmosphere and gradually raises the temperature to 1550℃ according to the program generated in S1 and holds it for 2 hours. S5: After the S4 heat preservation ends, the furnace is cooled to room temperature.

[0029] Please refer to the alumina (Al2O3) ceramic samples after debinding and sintering. Figure 3 The sample was intact, without cracks, warping, or holes.

[0030] Example 3 S1: Place the photocured green body into the debinding and sintering integrated furnace. Input the ceramic powder types in the green body: zirconium oxide (ZrO2) and yttrium oxide (Y2O3), and the resin types: 1,6-hexanediol diacrylate (HDDA) and tripropylene glycol diacrylate (TPGDA). The debinding and sintering integrated furnace process program execution module's built-in database directly generates the corresponding debinding and sintering curves based on the input ceramic powder and resin types: Under argon atmosphere, increase the temperature from room temperature to 415℃ at 5℃ / min, hold for 1 hour, then increase it to 430℃ at 0.5℃ / min, hold for 2 hours, then increase it to 600℃ at 0.5℃ / min, hold for 1 hour, then switch to air atmosphere, increase the temperature from 600℃ to 800℃ at 5℃ / min, hold for 2 hours, then increase it from 800℃ to 1500℃ at 5℃ / min, hold for 2 hours, and then cool down with the furnace.

[0031] S2: The debinding and sintering integrated furnace is evacuated and argon gas is returned. The temperature is gradually increased according to the program generated in S1, and the temperature is held at the organic matter decomposition temperature points of 415℃, 430℃ and 600℃ respectively. S3: After the S2 heat preservation is completed, the debinding and sintering integrated furnace is evacuated, the air atmosphere is replaced, and the temperature is gradually increased to 800℃ according to the program generated in S1 and kept at that temperature for 2 hours. S4: After the heat preservation in S3 is completed, the debinding and sintering furnace continues to maintain an air atmosphere and gradually raises the temperature to 1500℃ according to the program generated in S1 and holds it for 2 hours. S5: After the S4 heat preservation ends, the furnace is cooled to room temperature.

[0032] Please refer to the zirconia (ZrO2) ceramic samples after debinding and sintering. Figure 4 The sample was intact, without cracks, warping, or holes.

[0033] In summary, this invention realizes a continuous process from low-temperature debinding to high-temperature sintering within the same debinding and sintering integrated furnace. It automatically generates debinding and sintering programs based on the characteristics of different ceramic powders and photosensitive resins, and flexibly controls the temperature curve, heating and cooling rates, atmosphere type, and holding time. This achieves automatic decision-making for the debinding and sintering curve and intelligent execution of the entire process, significantly improving yield and consistency.

[0034] Those skilled in the art will readily understand that the above description is merely a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions, and improvements made within the spirit and principles of the present invention should be included within the scope of protection of the present invention.

Claims

1. A smart post-processing method integrating binder removal and sintering of photocurable ceramics, characterized in that: Includes the following steps: S1. Place the photocurable preform into the debinding and sintering integrated furnace, input the type of ceramic powder and resin in the photocurable preform, and the debinding and sintering integrated furnace intelligently generates the debinding and sintering integrated molding program. S2. The debinding and sintering integrated furnace is evacuated and backfilled with inert gas. The temperature is gradually increased according to the debinding and sintering integrated forming procedure in step S1, and the temperature is maintained at the organic matter decomposition temperature until the organic matter is completely decomposed and removed, thus completing the first stage of debinding. S3. After the heat preservation in step S2 is completed, air is introduced into the debinding and sintering integrated furnace. The temperature is gradually increased and maintained according to the debinding and sintering integrated forming procedure in step S1 until all carbon is completely removed, thus completing the second stage of debinding. The debinding stage is now complete. S4. After the heat preservation in step S3 is completed, the debinding and sintering integrated furnace is evacuated and backfilled with a specific gas. Then, according to the debinding and sintering integrated forming procedure in step S1, the temperature is gradually raised to the preset temperature and kept at that temperature until the debinding green body is sintered and formed. The specific gas is selected from one of air, nitrogen, carbon monoxide, carbon dioxide, hydrogen or inert gas. S5. After the heat preservation in step S4 is completed, the temperature is gradually reduced to room temperature according to the debinding and sintering integrated forming process in step S1 to obtain the sintered ceramic.

2. The intelligent post-processing method for photocurable ceramic debinding and sintering as described in claim 1, characterized in that: The debinding and sintering integrated furnace includes a furnace body heating module, a vacuum system module, a gas input / output module, a multi-point temperature detection module, a PLC control module, and a process program execution module. The process execution module automatically generates an integrated debinding and sintering process program by calling the built-in database based on the input ceramic powder type and resin type, and then sends the process program to the PLC control module. The PLC control module is connected to the furnace body heating module, vacuum system module, gas input / output module and multi-point temperature detection module respectively, and is used to control the furnace body heating module to complete the heating, heat preservation and cooling steps according to the process program. The vacuum system module is used to perform vacuuming and pressure stabilization operations, control the gas input and output module to realize the automatic switching of debinding atmosphere, air atmosphere and sintering atmosphere, and receive real-time temperature feedback from the multi-point temperature detection module to perform closed-loop regulation of the heating process. The multi-point temperature detection module is used to monitor the temperature at multiple locations inside the furnace cavity and return the monitoring data to the PLC control module and the process program execution module to determine whether each process stage has met the set conditions. The vacuum system module and the gas input / output module together constitute the furnace atmosphere control unit. Under the scheduling of the PLC control module, vacuuming, gas replenishment and atmosphere switching are realized, so that the debinding and sintering integrated furnace can automatically complete the entire process of debinding and sintering in the same furnace cavity according to the process program.

3. The intelligent post-processing method for photocurable ceramic debinding and sintering as described in claim 2, characterized in that: The debinding and sintering integrated furnace also includes a display screen module, which is connected to the process program execution module and is used to display real-time temperature curves, atmosphere status, and program execution steps.

4. The integrated intelligent post-processing method for photocurable ceramic debinding and sintering as described in claim 2, characterized in that: The process execution module has a built-in database of resin thermal decomposition characteristic temperatures and ceramic phase transformation temperatures. Based on the input ceramic powder type and resin type, it directly generates the corresponding holding temperature point, heating rate and recommended atmosphere to achieve full process control of debinding and sintering.

5. The intelligent post-processing method for photocurable ceramic debinding and sintering as described in claim 1, characterized in that: In step S1, the ceramic particles in the photocured green body are one or more of the following: alumina, silicon oxide, zirconium oxide, titanium oxide, magnesium oxide, yttrium oxide, barium titanate, silicon nitride, boron nitride, aluminum nitride, boron carbide, silicon carbide, kaolin, mullite, spinel, hydroxyapatite, tricalcium phosphate, and perovskite oxides.

6. The intelligent post-processing method for photocurable ceramic debinding and sintering as described in claim 1, characterized in that: In step S1, the resin in the photocurable preform is one or more of styrene, vinyl acetate, N-vinylpyrrolidone, glycidyl methacrylate, triethylene glycol divinyl acid, 1,4-cyclohexyldimethyl divinyl aldehyde, 4-hydroxybutyl vinyl acid, glyceryl carbonate propylene ester, dodecyl vinyl acid, isobornyl methacrylate, triethylene glycol diacrylate, 1,6-hexanediol diacrylate, trimethylolpropane triacrylate, and pentaerythritol tetraacrylate.

7. The integrated intelligent post-processing method for photocurable ceramic debinding and sintering as described in claim 1, characterized in that: In step S5, the cooling rate is set by the process program, either by natural cooling after the heating process stops, or by introducing air, nitrogen, or inert gas to accelerate cooling.

8. A photocurable ceramic prepared by the method according to any one of claims 1-7.

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