Silicon carbide ceramic slurry, method for producing the same, use thereof, and silicon carbide ceramic member

Abstract

This application discloses a silicon carbide ceramic slurry, its preparation method, uses, and silicon carbide ceramic components. The silicon carbide ceramic slurry is prepared from raw materials comprising the following parts by weight: 75-95 parts silicon carbide powder, 5-20 parts distilled water, 3-15 parts photosensitive resin, 1-5 parts dispersant, and 1-6 parts initiator. This application produces a water-based silicon carbide slurry with high solids content, low viscosity, and excellent curing effect. It uses environmentally friendly water-based materials; the cured green samples can be cleaned with water, avoiding the use of organic cleaning agents, reducing production costs, improving operational safety, and conforming to environmental protection principles.

Description

Technical Field

[0001] This application discloses a silicon carbide ceramic slurry, its preparation method, uses, and silicon carbide ceramic components, belonging to the field of 3D printing technology for ceramic materials. Background Technology

[0002] DLP (Digital Light Processing) photopolymerization technology is a type of emerging 3D printing technology. It has a fast forming speed, high raw material utilization rate in layer-by-layer printing, no need for molds, simple equipment, high resolution and high precision, and can easily prepare parts with complex structures.

[0003] Silicon carbide (SiC) ceramics are technical ceramics with strong covalent bonds, possessing excellent mechanical properties, superior oxidation and corrosion resistance, and extremely high wear resistance due to their low coefficient of friction and coefficient of thermal expansion. They are widely used in aerospace, defense, machinery, chemical, electronics, and metallurgical fields. However, the inherent high hardness and brittleness of silicon carbide ceramics also present significant challenges to their processing and forming, especially in the manufacture of complex silicon carbide parts, which remains a major difficulty.

[0004] Currently, 3D printing has made significant progress in the application of white ceramic systems (such as ZrO2, Al2O3, and SiO2), but its development in SiC ceramic materials has been slow. Only a very small number of resin-based photocurable silicon carbide slurries prepared using acrylic resin solvents can be used for 3D printing. However, the cleaning of parts made from resin-based slurries consumes large amounts of industrial organic cleaning agents such as ethanol, resulting in significant resource waste, environmental harm, and serious safety hazards. Ideally, replacing the solvent with water would completely avoid these problems. However, water has a very small molecular structure with high surface tension and cannot complete the photopolymerization reaction alone, nor can it stabilize ceramic powder into a uniformly dispersed, low-viscosity fluid state using water as a solvent. Therefore, by selecting different types of water-soluble monomers and strictly controlling the ratio of the aqueous solution to each monomer, it is possible to ensure that the ceramic powder can be uniformly coated and dispersed in the solvent while meeting the curing requirements for photocurable printing. Summary of the Invention

[0005] To address the shortcomings of existing technologies, the purpose of this application is to provide a silicon carbide ceramic slurry, its preparation method, uses, and silicon carbide ceramic components, which can ensure molding accuracy and strength while allowing the parts to be washed during processing, thus achieving operational safety and environmental protection.

[0006] In a first aspect, this application provides a silicon carbide ceramic slurry, comprising the following components in parts by mass: Silicon carbide ceramic powder: 75 parts to 95 parts; Photosensitive resin: 3 to 15 parts; Distilled water: 5 to 20 parts; Dispersant: 1 to 5 parts; Photoinitiator: 1 to 6 parts.

[0007] Optionally, the silicon carbide ceramic slurry comprises the following components in parts by mass: Silicon carbide ceramic powder: 85-90 parts; Photosensitive resin: 5-10 parts; Distilled water: 10-15 parts; Dispersant: 3-5 parts; Photoinitiator: 2-5 parts.

[0008] Further optionally, the mass fractions of the silicon carbide ceramic powder are independently selected from 75 parts, 80 parts, 85 parts, 86 parts, 87 parts, 88 parts, 89 parts, 90 parts, and 95 parts; the mass fractions of the photosensitive resin are independently selected from 3 parts, 5 parts, 7 parts, 9 parts, 10 parts, 13 parts, and 15 parts; the mass fractions of the distilled water are independently selected from 5 parts, 10 parts, 11 parts, 12 parts, 13 parts, 14 parts, and 15 parts; the mass fractions of the dispersant are independently selected from 1 part, 2 parts, 3 parts, 4 parts, and 5 parts; and the mass fractions of the photoinitiator are independently selected from 1 part, 2 parts, 3 parts, 4 parts, 5 parts, and 6 parts.

[0009] Optionally, the photosensitive resin includes at least one of hydroxyethyl methacrylate, polyethylene glycol diacrylate, hydroxypropyl methacrylate, dicyclopentenyl acrylate, cyclotrimethylolpropane methyl acetal acrylate, acryloylmorpholine, isobornyl acrylate, propoxylated neopentyl glycol diacrylate, isobornyl methacrylate, polyurethane acrylate, dipropylene glycol diacrylate, ethoxylated trimethylolpropane triacrylate, tripropylene glycol diacrylate, 1,6-hexanediol diacrylate, polyurethane dimethacrylate, ethylene glycol dimethacrylate, 2-hydroxyethyl methacrylate phosphate, trimethylolpropane triacrylate, trimethylolpropane trimethacrylate, and dipentaerythritol hexaacrylate.

[0010] Optionally, the dispersant includes at least one of the following: a polymer salt solvent containing acidic groups, a high molecular weight block copolymer solution containing pigment affinity groups, a hydroxy functional carboxylic acid ester containing pigment affinity groups, a structured acrylic copolymer solution containing pigment affinity groups, an alkanoic ammonium salt containing an acidic copolymer, a high molecular weight alkane aminoamide solvent, and a modified polyurethane solution.

[0011] Optionally, the photoinitiator includes at least one of diphenyl-(2,4,6-trimethylbenzoyl)phosphine oxide, 2-phenylbenzyl-2-dimethylamine-1-(4-morpholinobenzylphenyl)butanone, phenylbis(2,4,6-trimethylbenzoyl)phosphine oxide, 2-hydroxy-2-methyl-1-phenyl-1-propanone, benzoin dimethyl ether, ethyl p-N,N-dimethylaminobenzoate, methyl o-benzoylbenzoate, benzophenone, 4-chlorobenzophenone, 2-methyl-1-[4-methylthiophenyl]-2-morpholino-1-propanone, 4-phenylbenzophenone, bis(4-tert-butylphenyl)iodohexafluorophosphate, and 1-hydroxy-cyclohexyl-phenyl ketone.

[0012] Optionally, the D50 of the silicon carbide ceramic powder is 1μm to 15μm.

[0013] Secondly, this application provides a method for preparing the silicon carbide ceramic slurry as described above, comprising the following steps: Distilled water and dispersant were added to the photosensitive resin in sequence and stirred to form a uniform mixture; Silicon carbide ceramic powder is added to the mixture under stirring, followed by the addition of a photoinitiator and ball milling material for ball milling to obtain the silicon carbide ceramic slurry.

[0014] Optionally, the abrasive ball may include zirconium beads.

[0015] Thirdly, this application provides an application of the silicon carbide ceramic slurry as described above in the preparation of silicon carbide ceramic components with complex structures.

[0016] Fourthly, this application provides a method for preparing complex-structured silicon carbide ceramic components, comprising the following steps: Pour the silicon carbide ceramic slurry described above into the material cylinder of the 3D printer; Based on the preset complex structure model and printing conditions, printing is performed to obtain a silicon carbide component green blank with a complex structure; After the silicon carbide component green body is washed with water, it is vacuum degreased and sintered to obtain the silicon carbide ceramic component with the complex structure.

[0017] Optionally, in the printing conditions, the exposure intensity is controlled to be 200 mW / cm. 2 ~350mW / cm 2 Exposure time: 5s to 30s.

[0018] Further optionally, the exposure intensity can specifically be 200mW / cm. 2 240mW / cm 2 280mW / cm 2 320mW / cm 2 350mW / cm2 The exposure time can be 5s, 10s, 15s, 20s, 25s, or 30s.

[0019] Optionally, the vacuum degreasing temperature is 350℃~500℃.

[0020] Further optionally, the vacuum degreasing temperature can be 350℃, 380℃, 400℃, 420℃, 450℃, 480℃, or 500℃.

[0021] Optionally, the sintering temperature is 1800℃~2200℃.

[0022] Further optionally, the sintering temperature can be 1800℃, 1900℃, 2000℃, 2100℃, or 2200℃.

[0023] Fifthly, this application provides a silicon carbide ceramic component prepared using the silicon carbide ceramic slurry described above.

[0024] The beneficial effects of this application are as follows: 1. By selecting the types of water-based photosensitive resin, dispersant, and photoinitiator, and controlling the ratio of silicon carbide powder to water-based resin / water, the ratio of dispersant to powder, and the ratio of initiator to resin within a synergistic range, a water-based silicon carbide slurry with high solid content, low viscosity, uniform dispersion, and excellent curing effect can be prepared. This slurry can meet the comprehensive requirements of DLP photopolymerization printing for fluidity, stability, and curing depth, thereby successfully preparing silicon carbide ceramic components with complex structures.

[0025] 2. Silicon carbide ceramic samples printed by photocuring can be directly cleaned with water, which not only saves a lot of industrial organic cleaning agents and conforms to the modern green and environmentally friendly concept, but also greatly reduces the safety hazards caused by industrial organic cleaning agents and creates a safer production and operation environment. Attached Figure Description

[0026] One or more embodiments are illustrated by way of example with reference numerals in the accompanying drawings. These illustrations do not constitute a limitation on the embodiments. Elements with the same reference numerals in the drawings are denoted as similar elements. Unless otherwise stated, the figures in the drawings are not to be limited by scale.

[0027] Figure 1 This is a flowchart illustrating the preparation process of the water-based silicon carbide ceramic components obtained in Examples 1-5 of this application; Figure 2 Viscosity graphs of slurries with different solid contents in Examples 1-5; Figure 3 Photographs of silicon carbide ceramics with complex structures printed by DLP photopolymerization 3D printing; Figure 3 (a) shows the printed honeycomb structure sample from Example 6; Figure 3 (b1) is the printed sample of Example 6. Figure 3 (b2) is the printed sample of Comparative Example 2; Figure 3 (c) shows the printed ring samples of different diameters in Example 8. Detailed Implementation

[0028] The present application will now be described in detail with reference to specific embodiments. These embodiments will help those skilled in the art to further understand the present application, but do not limit the present application in any way. It should be noted that those skilled in the art can make several modifications and improvements without departing from the concept of the present application. These all fall within the protection scope of the present application.

[0029] Unless otherwise specified, the raw materials used in the examples were commercially purchased and used directly without processing; the instruments and equipment used were based on the manufacturer's recommended operating parameters. It should be noted that the D of the silicon carbide powder... 50 There is a synergistic relationship between particle size and slurry formulation. When the particle size is finer (e.g., 1μm~5μm), the specific surface area is larger, requiring an appropriate increase in the amount of dispersant to control viscosity and prevent agglomeration. When the particle size is coarser (e.g., 10μm~15μm), the particle settling tendency is enhanced, necessitating an appropriate increase in the resin ratio to strengthen the bonding strength between cured layers and improve slurry stability. In the following examples, each formulation has been optimized according to the selected powder particle size to ensure the printability and molding quality of the slurry.

[0030] The specific embodiments of this application use some of the raw materials sourced from the following sources: hydrophilic modified polyurethane (using BYK-181, purchased from BYK Chemical); and polymer salt solvent containing acidic groups (using BYK-111, purchased from BYK Chemical). The above products are merely illustrative examples; those skilled in the art may choose other products with the same or similar functions as substitutes.

[0031] In the examples and comparative examples, the viscosity of the slurry was tested using a Kinexus rotational rheometer, and printing was performed using an RJ-4K-DLP printer from Jiaxing Raoji Technology Co., Ltd.

[0032] Solid content is calculated using the following formula: Solid content =

[0033] Where: m f m1 represents the mass of silicon carbide powder, m2 represents the mass of photosensitive resin, and m3 represents the mass of dispersant.

[0034] In the examples, the parts for each raw material are all by mass.

[0035] Example 1 This embodiment provides a method for preparing silicon carbide ceramic slurry for DLP photopolymerization 3D printing, such as... Figure 1 As shown, the specific steps include: Step 1: Mix 5 parts polyethylene glycol diacrylate (PEGDA), 5 parts hydroxyethyl methacrylate (HEMA), 5 parts trimethylolpropane triacrylate (TMPTA) and 20 parts distilled water to obtain a premixed solution for later use. Step 2: Add 2 parts of alkanolamide and 2 parts of hydrophilic modified polyurethane to the premixed liquid obtained in Step 1, stir and mix well, pour into a stirred ball mill, add zirconium beads with a diameter of 3 mm and stir, add 75 parts of silicon carbide ceramic powder in multiple times until all of it is added to the ball mill, and ball mill at a speed of 100 r / min for 12 h, wherein the D50 of the silicon carbide powder particles is 1 μm; Step 3: Add 2 parts of 2-phenylbenzyl-2-dimethylamine-1-(4-morpholinobenzylphenyl)butanone, 2 parts of 2-isopropylthioxanthone, 1 part of ethyl p-N,N-dimethylaminobenzoate, and 1 part of bis(4-tert-butylphenyl)iodohexafluorophosphate to a stirred ball mill. Continue ball milling for 8 hours until the initiator is completely dissolved to obtain a silicon carbide ceramic slurry with a solid content of 75 wt% and a viscosity of 3850 mPa·s for DLP photopolymerization 3D printing.

[0036] Example 2 This embodiment provides a method for preparing silicon carbide ceramic slurry for DLP photopolymerization 3D printing, such as... Figure 1 As shown, the specific steps include: Step 1: Mix 1 part polyurethane dimethacrylate (UDMA), 1 part hydroxyethyl methacrylate (HEMA), 1 part acrylomorpholine (ACMO) and 15 parts distilled water to obtain a premixed solution for later use. Step 2: Add 0.5 parts of the polymer salt solvent with acidic groups and 0.5 parts of the hydrophilic modified polyurethane to the premixed liquid obtained in Step 1, stir and mix well, pour into a stirred ball mill, add zirconium beads with a diameter of 3 mm and stir, add 95 parts of silicon carbide ceramic powder in multiple times until all of it is added to the ball mill, and ball mill at a speed of 100 r / min for 12 h, wherein the D50 of the silicon carbide powder particles is 10 μm; Step 3: Add 0.5 parts of 2-phenylbenzyl-2-dimethylamine-1-(4-morpholinobenzylphenyl)butanone and 0.5 parts of 2-methyl-2-(4-morpholinyl)-1-[4-(methylthio)phenyl]-1-propanone to a stirred ball mill and continue ball milling for 5 hours until the initiator is completely dissolved. This will produce a silicon carbide ceramic slurry with a solid content of 95 wt% and a viscosity of 3500 mPa·s for DLP photopolymerization 3D printing.

[0037] Example 3 This embodiment provides a method for preparing silicon carbide ceramic slurry for DLP photopolymerization 3D printing, such as... Figure 1 As shown, the specific steps include: Step 1: Mix 5 parts acrylamide (ACMO) and 10 parts distilled water to obtain a premixed solution for later use; Step 2: Add 1 part of hydrophilic modified polyurethane and 2 parts of high molecular weight alkane amino amide solvent to the premixed liquid obtained in Step 1, stir and mix well, pour into a ball mill, add zirconium beads with a diameter of 3 mm and stir, add 90 parts of silicon carbide ceramic powder in multiple times until all of it is added to the ball mill, and ball mill at a speed of 120 r / min for 15 h, wherein the D50 of the silicon carbide powder particles is 15 μm; Step 3: Add 1 part of 2-phenylbenzyl-2-dimethylamine-1-(4-morpholinobenzylphenyl)butanone and 1 part of 2-methyl-2-(4-morpholino)-1-[4-(methylthio)phenyl]-1-propanone to a stirred ball mill and continue ball milling for 5 hours until the initiator is completely dissolved. This will produce a silicon carbide ceramic slurry with a solid content of 90 wt% and a viscosity of 6450 mPa·s for DLP photopolymerization 3D printing.

[0038] Example 4 This embodiment provides a method for preparing a silicon carbide ceramic water-based slurry for DLP photopolymerization 3D printing, such as... Figure 1 As shown, the specific steps include: Step 1: Mix 3 parts hydroxyethyl methacrylate (HEMA), 7 parts acrylamide (ACMO), and 10 parts distilled water to obtain a premixed solution for later use; Step 2: Add 0.75 parts of alkanolamide, 0.75 parts of high molecular weight alkane amino amide solvent and 1.5 parts of hydrophilic modified polyurethane to the premixed liquid obtained in Step 1, stir and mix well, pour into a stirred ball mill, add zirconium beads with a diameter of 3 mm and stir, add 85 parts of silicon carbide ceramic powder in multiple times until all of it is added to the ball mill, and ball mill at a speed of 100 r / min for 10 h, wherein the D50 of the silicon carbide powder particles is 5 μm; Step 3: Add 1 part of diphenyl-(2,4,6-trimethylbenzoyl)phosphine and 1 part of 2-phenylbenzyl-2-dimethylamine-1-(4-morpholinobenzylphenyl)butanone to a stirred ball mill and continue ball milling for 8 hours until the initiator is completely dissolved. This will produce a silicon carbide ceramic slurry with a solid content of 85 wt% and a viscosity of 3850 mPa·s for DLP photopolymerization 3D printing.

[0039] Example 5 This embodiment provides a method for preparing a silicon carbide ceramic water-based slurry for DLP photopolymerization 3D printing, such as... Figure 1 As shown, the specific steps include: Step 1: Mix 1.25 parts of polyurethane dimethacrylate (UDMA), 8.75 parts of hydroxyethyl methacrylate (HEMA), and 20 parts of distilled water to obtain a premixed solution for later use; Step 2: Add 2 parts of alkanolamide and 3 parts of hydrophilic modified polyurethane to the premixed liquid obtained in Step 1, stir and mix well, pour into a stirred ball mill, add zirconium beads with a diameter of 3 mm and stir, add 80 parts of silicon carbide ceramic powder in multiple times until all of it is added to the ball mill, and ball mill at a speed of 120 r / min for 15 h, wherein the D50 of the silicon carbide powder particles is 15 μm; Step 3: Add 1 part of diphenyl-(2,4,6-trimethylbenzoyl)phosphine oxide, 2 parts of phenylbis(2,4,6-trimethylbenzoyl)phosphine oxide, and 2 parts of 2-hydroxy-2-methyl-1-phenyl-1-propanone to a stirred ball mill and continue ball milling for 8 hours until the initiator is completely dissolved. This will produce a silicon carbide ceramic slurry with a solid content of 80 wt% and a viscosity of 4250 mPa·s for DLP photopolymerization 3D printing.

[0040] The curves showing the relationship between solid content and viscosity of silicon carbide ceramic slurries in Examples 1-5 are shown in Figure 2.

[0041] Example 6 This embodiment provides a method for preparing complex-structure silicon carbide ceramic components using silicon carbide ceramic slurry, specifically including the following steps: Step 1: Pour the silicon carbide ceramic slurry obtained in Example 1 into the printer's feed cylinder; Step 2: Prepare the complex structural model to be printed. Import the STL format model into the printing software and set the exposure intensity of the DLP printer to 200mW / cm². 2 Printing is performed with an exposure time of 10 seconds. Step 3: After printing, remove the silicon carbide ceramic green body with its complex structure from the printing platform and clean it with tap water; Step 4: The cleaned silicon carbide ceramic component green body is first degreased in a vacuum to 350℃, and then sintered in a muffle furnace to 2200℃ to obtain a dense and defect-free silicon carbide ceramic component with a complex structure, as shown in the figure. Figure 3 As shown in (a).

[0042] Example 7 This embodiment provides a method for preparing complex-structure silicon carbide ceramic components using silicon carbide ceramic slurry, specifically including the following steps: Step 1: Pour the silicon carbide ceramic slurry obtained in Example 2 into the printer's feed cylinder; Step 2: Prepare the complex structural model to be printed. Import the STL format model into the printing software and set the exposure intensity of the DLP printer to 240mW / cm². 2 Printing is performed with an exposure time of 20 seconds. Step 3: After printing, remove the silicon carbide ceramic green body with its complex structure from the printing platform and clean it with tap water; Step 4: The cleaned silicon carbide ceramic component green body is first degreased in a vacuum to 450℃, and then sintered in a muffle furnace to 2100℃ to obtain a dense and defect-free silicon carbide ceramic component with a complex structure, as shown in the figure. Figure 3 As shown in (b1).

[0043] Example 8 This embodiment provides a method for preparing complex-structure silicon carbide ceramic components using silicon carbide ceramic slurry, specifically including the following steps: Step 1: Pour the silicon carbide ceramic slurry obtained in Example 4 into the printer's feed cylinder; Step 2: Prepare the complex structural model to be printed. Import the STL format model into the printing software and set the exposure intensity of the DLP printer to 350mW / cm. 2 Printing is performed with an exposure time of 15 seconds. Step 3: After printing, remove the silicon carbide ceramic green body with its complex structure from the printing platform and clean it with tap water; Step 4: The cleaned silicon carbide ceramic component green body is first degreased in a vacuum to 550℃, and then sintered in a muffle furnace to 2100℃ to obtain a dense and defect-free silicon carbide ceramic component with a complex structure, as shown in the figure. Figure 3 As shown in (c).

[0044] Comparative Example 1 The only difference between this comparative example and Example 1 is that distilled water was not added during the preparation of the silicon carbide ceramic slurry.

[0045] Step 1: Mix 5 parts polyethylene glycol diacrylate (PEGDA), 5 parts hydroxyethyl methacrylate (HEMA), and 5 parts trimethylolpropane triacrylate (TMPTA) to obtain a premixed solution for later use; Step 2: Add 2 parts of alkanolamide and 2 parts of hydrophilic modified polyurethane to the premixed liquid obtained in Step 1, stir and mix well, pour into a stirred ball mill, add zirconium beads with a diameter of 3 mm and stir, add 75 parts of silicon carbide ceramic powder in multiple times until all of it is added to the ball mill, and ball mill at a speed of 100 r / min for 12 h. Step 3: Add 2 parts of 2-phenylbenzyl-2-dimethylamine-1-(4-morpholinobenzylphenyl)butanone, 2 parts of 2-isopropylthioxanthone, 1 part of ethyl p-N,N-dimethylaminobenzoate and 1 part of bis(4-tert-butylphenyl)iodohexafluorophosphate to a stirred ball mill and continue ball milling for 8 hours to obtain resin-based silicon carbide ceramic slurry.

[0046] Tests showed that the solid content of the slurry obtained in this comparative example was 75 wt% and the viscosity was 4250 mPa·s.

[0047] Comparative Example 2 The only difference between this comparative example and Example 6 is that the resin-based silicon carbide ceramic slurry obtained in Comparative Example 1 was used in the preparation of the complex structure silicon carbide ceramic component. The resulting silicon carbide ceramic component has the structure as shown in Example 6. Figure 3 As shown in (b2).

[0048] In Comparative Example 2, the ceramic green body printed using resin-based ceramic slurry required rinsing with industrial alcohol, and the internal pore structure also needed to be cleaned with an air pump. In contrast, the sample in Example 6 could be easily cleaned with tap water. The cleaning process was simple, safe, and environmentally friendly. Furthermore, both groups of final samples were observed to be dense, defect-free, and finely structured with no significant differences.

[0049] Comparative Example 3 The only difference between this comparative example and Example 2 is that the amount of silicon carbide ceramic powder is increased to 100 parts, while the other components and preparation steps are the same as in Example 2.

[0050] Tests showed that the slurry obtained in this comparative example had too high a viscosity (>15000 mPa·s) and poor fluidity, making it impossible to lay evenly in a DLP printer and thus impossible to complete the printing process.

[0051] Comparative Example 4 The only difference between this comparative example and Example 2 is that the amount of silicon carbide ceramic powder is reduced to 60 parts, while the other components and preparation steps are the same as in Example 2.

[0052] Tests showed that the slurry obtained in this comparative example had an excessive shrinkage rate (>25%) after sintering, resulting in obvious cracking and deformation, and thus failing to produce dense and defect-free ceramic components.

[0053] Comparative Example 5 The only difference between this comparative example and Example 6 is that the exposure intensity of the DLP printer is set to 100mW / cm², while the other printing conditions and post-processing steps are the same as in Example 6.

[0054] Testing revealed that the silicon carbide ceramic green body printed in this comparative example had insufficient curing depth and poor interlayer bonding, resulting in delamination and localized detachment during the cleaning process, making it impossible to obtain a complete green body.

[0055] The specific embodiments of this application have been described above. It should be understood that this application is not limited to the specific embodiments described above, and those skilled in the art can make various modifications or variations within the scope of the claims, which do not affect the substantive content of this application.

Claims

1. A silicon carbide ceramic slurry, characterized in that, Includes the following components by mass: Silicon carbide ceramic powder: 75 parts to 95 parts; Photosensitive resin: 3 to 15 parts; Distilled water: 5 to 20 parts; Dispersant: 1 to 5 parts; Photoinitiator: 1 to 6 parts.

2. The silicon carbide ceramic slurry according to claim 1, characterized in that, Includes the following components by mass: Silicon carbide ceramic powder: 85-90 parts; Photosensitive resin: 5-10 parts; Distilled water: 10-15 parts; Dispersant: 3-5 parts; Photoinitiator: 2-5 parts.

3. The silicon carbide ceramic slurry according to claim 1 or 2, characterized in that, The photosensitive resin includes at least one of hydroxyethyl methacrylate, polyethylene glycol diacrylate, hydroxypropyl methacrylate, dicyclopentenyl acrylate, cyclotrimethylolpropane methyl acetal acrylate, acryloylmorpholine, isobornyl acrylate, propoxylated neopentyl glycol diacrylate, isobornyl methacrylate, polyurethane acrylate, dipropylene glycol diacrylate, ethoxylated trimethylolpropane triacrylate, tripropylene glycol diacrylate, 1,6-hexanediol diacrylate, polyurethane dimethacrylate, ethylene glycol dimethacrylate, 2-hydroxyethyl methacrylate phosphate, trimethylolpropane triacrylate, trimethylolpropane trimethacrylate, and dipentaerythritol hexaacrylate.

4. The silicon carbide ceramic slurry according to claim 1 or 2, characterized in that, The dispersant comprises at least one of the following: a polymer salt solvent containing acidic groups, a high molecular weight block copolymer solution containing pigment affinity groups, a hydroxy functional carboxylic acid ester containing pigment affinity groups, a structured acrylic copolymer solution containing pigment affinity groups, an alkanoic ammonium salt containing an acidic group copolymer, a high molecular weight alkane aminoamide solvent, and a modified polyurethane solution.

5. The silicon carbide ceramic slurry according to claim 1 or 2, characterized in that, The photoinitiator includes at least one of diphenyl-(2,4,6-trimethylbenzoyl)phosphine oxide, 2-phenylbenzyl-2-dimethylamine-1-(4-morpholinobenzylphenyl)butanone, phenylbis(2,4,6-trimethylbenzoyl)phosphine oxide, 2-hydroxy-2-methyl-1-phenyl-1-propanone, benzoin dimethyl ether, ethyl p-N,N-dimethylaminobenzoate, methyl o-benzoylbenzoate, benzophenone, 4-chlorobenzophenone, 2-methyl-1-[4-methylthiophenyl]-2-morpholino-1-propanone, 4-phenylbenzophenone, bis(4-tert-butylphenyl)iodohexafluorophosphate, and 1-hydroxy-cyclohexyl-phenyl ketone.

6. The silicon carbide ceramic slurry according to claim 1 or 2, characterized in that, The D50 of the silicon carbide ceramic powder is 1μm~15μm.

7. A method for preparing a silicon carbide ceramic slurry according to any one of claims 1 to 6, characterized in that, Includes the following steps: Distilled water and dispersant were added to the photosensitive resin in sequence and stirred to form a uniform mixture; Under stirring, silicon carbide ceramic powder and ball milling material are added to the mixture for ball milling, and then a photoinitiator is added for further ball milling to obtain the silicon carbide ceramic slurry.

8. The method for preparing silicon carbide ceramic slurry according to claim 7, characterized in that, The abrasive ball includes zirconium beads.

9. The application of a silicon carbide ceramic slurry as described in claim 1 or 2 in the preparation of silicon carbide ceramic components with complex structures.

10. A method for preparing a complex structure silicon carbide ceramic component, characterized in that, Includes the following steps: The silicon carbide ceramic slurry as described in claim 1 is poured into the material cylinder of the 3D printer; Based on the preset complex structure model and printing conditions, printing is performed to obtain a silicon carbide component green blank with a complex structure; After the silicon carbide component green body is washed with water, it is vacuum degreased and sintered to obtain the silicon carbide ceramic component with the complex structure.

11. The method for preparing complex structure silicon carbide ceramic components according to claim 10, characterized in that, In the printing conditions, the exposure intensity is controlled at 200 mW / cm. 2 ~350mW / cm 2 Exposure time: 5s to 30s.

12. The method for preparing complex structure silicon carbide ceramic components according to claim 10, characterized in that, The vacuum degreasing temperature is 350℃~500℃.

13. The method for preparing complex structure silicon carbide ceramic components according to claim 10, characterized in that, The sintering temperature is 1800℃~2200℃.

14. A silicon carbide ceramic component, characterized in that, Prepared using silicon carbide ceramic slurry as described in any one of claims 1 to 6.

Images