A black ceramic powder light-curing 3D printing slurry and preparation method

Abstract

The present invention discloses a black ceramic powder 3D printing photocurable slurry and a preparation method, wherein the photocurable slurry includes the following raw materials in parts by weight: 100 parts of black ceramic powder, 70-100 parts of auxiliary printing ceramic powder, 2-5 parts of photosensitive resin, 1-2 parts of photoinitiator, 1-2 parts of defoamer, 1-2 parts of leveling agent and 1-2 parts of dispersant, and also includes 164-294 parts of solvent. The preparation method of the present invention is to add a light-colored ceramic powder that is easy to cure to the black ceramic powder that is difficult to photocurable, and mix it with the photoinitiator, dispersant and other additives to form a slurry. The addition of the ceramic powder that is easy to photocurable can greatly improve its fluidity and improve the slurry's ability to cure with ultraviolet light, so that the single-layer cured thickness can reach more than 54μm, which is conducive to the molding of photocurable printing.

Description

Technical Field

[0001] The present invention relates to the field of additive manufacturing technology, and in particular to a black ceramic powder light-curing 3D printing slurry and a preparation method thereof. Background Art

[0002] Ceramic materials, with their advantages of high hardness, high melting point, high wear resistance, and oxidation resistance, have broad application prospects in aerospace, energy and environmental protection, biomedicine, and other fields. Traditional ceramic sample forming processes mainly include injection molding, compression molding, and gel casting. These methods have long manufacturing times, low processing precision, and difficulty in preparing highly complex structures. However, with the development of the times, the requirements for ceramic materials in real life are gradually increasing. Traditional ceramic sample preparation processes can no longer meet people's needs. There is an urgent need to improve ceramic material manufacturing technology to meet the needs of the times.

[0003] Additive manufacturing, also known as 3D printing, refers to first digitally cutting a three-dimensional CAD model into two-dimensional cross-sections, and then using a 3D printer under the control of a computer program to prepare physical parts point by point, line by line, or layer by layer. Additive manufacturing technology has the advantages of complex and integrated printable structures, short production cycle, and high printing accuracy. The technologies currently used for additive manufacturing of ceramic materials are mainly stereolithography (SL), inkjet printing (IJP), fused deposition modeling (FDM), selective laser sintering / melting (SLS / SLM), direct writing (DIW), and three-dimensional printing (3DP). Among them, the light-cured ceramics prepared by stereolithography (SL) technology can reach a density of more than 99% and have high molding accuracy and good surface quality, making it the focus of ceramic molding process technology.

[0004] Photosensitive slurry is the foundation of photocuring 3D printing technology. Only by formulating photosensitive slurry suitable for photocuring 3D printing systems can the technology continue to develop. Due to the mismatch between the refractive index of ceramic powder and photocurable resin and the scattering of incident light, photocuring 3D printing is only suitable for lighter-colored oxide ceramic powders. For darker ceramic powders, they absorb incident ultraviolet light, which affects the resin's absorption of light during the photocuring reaction, making it difficult to print or the curing thickness is insufficient. Existing processes cannot effectively solve this problem of photocuring printing of darker ceramic powders. Therefore, it is necessary to provide a black ceramic powder photocuring 3D printing slurry to solve the problem of existing black ceramic powder photocuring 3D printing being difficult to cure or having insufficient curing thickness. Summary of the Invention

[0005] To address the deficiencies in the prior art, the present invention provides a black ceramic powder light-curing 3D printing slurry and a preparation method thereof.

[0006] To achieve the above-mentioned purpose, the present invention is implemented through the following technical solutions:

[0007] One aspect of the present invention provides a black ceramic powder light-curing 3D printing slurry, comprising the following components in parts by weight:

[0008] 1000 parts of black ceramic powder, 700-1000 parts of auxiliary printing ceramic powder, 1700-3000 parts of photosensitive resin, 34-150 parts of photoinitiator, 17-60 parts of defoaming agent, 17-60 parts of leveling agent and 17-60 parts of dispersant;

[0009] Also includes 1700-2000 parts of solvent;

[0010] The auxiliary printing ceramic powder is a light-colored ceramic powder.

[0011] The photosensitive resin consists of oligomers, monofunctional monomers, difunctional monomers and trifunctional monomers.

[0012] In some specific embodiments of the present invention, the black ceramic powder includes CaMnO3 and Ca 1-x Gd x One or more of MnO3;

[0013] The Ca 1-x Gd x MnO3 is a rare earth element dopant of CaMnO3.

[0014] In some specific embodiments of the present invention, the light-colored ceramic powder is a ceramic powder that is lighter in color and is easy to be photocured.

[0015] In some specific embodiments of the present invention, the light-colored ceramic powder includes one or more of Al2O3 and ZrO2.

[0016] In some specific embodiments of the present invention, the photosensitive resin comprises 35-45% of oligomers, 25-35% of monofunctional monomers, 15-25% of difunctional monomers, and 5-15% of trifunctional monomers;

[0017] The oligomer is at least one of epoxy acrylate or polyester acrylate;

[0018] The monofunctional monomer is at least one of 4-acryloylmorpholine or 2-phenoxyethyl acrylate;

[0019] The difunctional monomer is at least one of 1,6-hexanediol diacrylate and 1,6-hexanediol dimethacrylate; the trifunctional monomer is at least one of propane trimethanol triacrylate and ethoxylated trimethylolpropane triacrylate.

[0020] In some specific embodiments of the present invention, the photoinitiator includes any two or three of α-hydroxyisobutyrophenone, 1-hydroxycyclohexylphenyl ketone, phenyl bisphosphine oxide, and 2-isopropylthioxanthone.

[0021] In some specific embodiments of the present invention, the solvent is ethanol.

[0022] In some specific embodiments of the present invention, the defoaming agent is one or both of BYK-1790 and BYK-1799.

[0023] In some specific embodiments of the present invention, the leveling agent is one or more of BYK-333, BYK-UV3510, and BYK-UV3500.

[0024] In some specific embodiments of the present invention, the dispersant is an anionic polycarboxylate ammonium salt.

[0025] In some specific embodiments of the present invention, the preparation of the above-mentioned black ceramic powder light-curing 3D printing slurry includes the following steps:

[0026] S1: The black ceramic powder, the auxiliary printing ceramic powder, and the solvent are fully mixed and then dried to obtain a mixed ceramic powder.

[0027] S2: Fully mix the photosensitive resin, photoinitiator, defoamer, leveling agent and dispersant to obtain a mixed solution.

[0028] S3: The prepared mixed ceramic powder is fully mixed with the mixed solution to obtain a black ceramic powder light-curing 3D printing slurry.

[0029] The present invention also provides a method for preparing a black ceramic powder light-cured 3D printing slurry, comprising the following steps:

[0030] S1: 1000 parts of black ceramic powder, 700-1000 parts of auxiliary printing ceramic powder, and 1700-2000 parts of solvent are fully mixed and dried to obtain a mixed ceramic powder;

[0031] The auxiliary printing ceramic powder is one or more of Al2O3 and ZrO2;

[0032] S2: thoroughly mixing 1700-3000 parts of a photosensitive resin, 34-150 parts of a photoinitiator, 17-60 parts of a defoaming agent, 17-60 parts of a leveling agent, and 17-60 parts of a dispersant to obtain a mixed solution; wherein the photosensitive resin is composed of an oligomer, a monofunctional monomer, a difunctional monomer, and a trifunctional monomer;

[0033] S3: The prepared mixed ceramic powder is fully mixed with the mixed solution to obtain a black ceramic powder light-curing 3D printing slurry.

[0034] In some specific embodiments of the present invention, the black ceramic powder is CaMnO3 and Ca 1-x Gd x One or more of MnO3;

[0035] The Ca 1-x Gd x MnO3 is a rare earth element dopant of CaMnO3;

[0036] In some specific embodiments of the present invention, the particle size of the black ceramic powder is 2-5 μm; the particle size of the auxiliary printing ceramic powder is 300-400 nm.

[0037] In some specific embodiments of the present invention, the photosensitive resin contains 35-45% of oligomers, 25-35% of monofunctional monomers, 15-25% of difunctional monomers and 5-15% of trifunctional monomers; the oligomers are at least one of epoxy acrylates or polyester acrylates; the monofunctional monomers are at least one of 4-acryloylmorpholine or 2-phenoxyethyl acrylate; the difunctional monomers are at least one of 1,6-hexanediol diacrylate and 1,6-hexanediol dimethacrylate; and the trifunctional monomers are at least one of propane trimethanol triacrylate and ethoxylated trimethylolpropane triacrylate.

[0038] In some specific embodiments of the present invention, the photoinitiator includes any two or three of α-hydroxyisobutyrophenone, 1-hydroxycyclohexylphenyl ketone, phenyl bisphosphine oxide, and 2-isopropylthioxanthone.

[0039] In some specific embodiments of the present invention, the solvent is ethanol.

[0040] In some specific embodiments of the present invention, the defoaming agent is one or both of BYK-1790 and BYK-1799.

[0041] In some specific embodiments of the present invention, the leveling agent is one or more of BYK-333, BYK-UV3510, and BYK-UV3500.

[0042] In some specific embodiments of the present invention, the dispersant is an anionic polycarboxylate ammonium salt.

[0043] In some specific embodiments of the present invention, the step of fully mixing in step S1 comprises using a ball mill at 200r / min-250r / min for 3-4h, the step of fully mixing in step S2 comprises stirring at 40°C-45°C on a magnetic stirrer for 15-20min, and the step of fully mixing in step S3 comprises using a ball mill at 300r / min-400r / min for 3h-6h.

[0044] Compared with the existing technology, the beneficial effect of the present invention is that: by adding light-colored ceramic powder that is easy to cure to black ceramic powder that is difficult to photocur, and mixing it with a photoinitiator, a dispersant and other additives to form a slurry, the addition of easy-to-photocurable ceramic powder can greatly improve its fluidity and enhance the slurry's ability to cure with ultraviolet light, so that the single-layer cured thickness can reach more than 54μm, which is conducive to the formation of photocurable printing. BRIEF DESCRIPTION OF THE DRAWINGS

[0045] Attachment Figure 1 This is a process flow chart for preparing a black ceramic powder light-curing 3D printing slurry in an embodiment of the present invention. DETAILED DESCRIPTION

[0046] The present invention will be further described with reference to the accompanying drawings and specific embodiments. It should be understood that these embodiments are intended to illustrate the present invention only and are not intended to limit the scope of the present invention. In addition, it should be understood that after reading the contents of the present invention, those skilled in the art may make various changes or modifications to the present invention, and these equivalent forms also fall within the scope defined by the appended claims of the present application.

[0047] The present invention is described in further detail below with reference to the accompanying drawings:

[0048] Preparation method and application of black ceramic powder light-curing 3D printing slurry:

[0049] S1. Powder preparation: Weigh 1000 parts by weight of black ceramic powder and 700-1000 parts of auxiliary printing ceramic powder, add 1700-2000 parts of ethanol, and place them in an Al2O3 ball mill. Add an appropriate amount of Al2O3 ball milling beads and ball mill at 200r / min-250r / min for 3-4h. After thorough mixing, filter out the ball milling beads with a metal mesh sieve, and then dry to obtain a mixed ceramic powder.

[0050] The black ceramic powder used is CaMnO3 and Ca 1-x Gd xOne or more of MnO3, the particle size of the black ceramic powder is 2-5μm; the auxiliary printing ceramic powder used is one or more of Al2O3 and ZrO2, and the particle size of the auxiliary printing ceramic powder is 300-400nm.

[0051] By first mixing and ball-milling the black ceramic powder and the auxiliary printing ceramic powder, the two ceramic powders are evenly dispersed, which is beneficial for the subsequent preparation of the photocuring slurry.

[0052] S2: Mix 34-150 parts of photosensitive resin, 17-60 parts of defoaming agent, 17-60 parts of leveling agent and 17-60 parts of dispersant, then add 17-60 parts of photoinitiator, place the mixed solution on a magnetic stirrer and stir at 40°C-45°C for 15-20 minutes to obtain a uniform mixed solution.

[0053] The photosensitive resin comprises an oligomer, a monofunctional monomer, a difunctional monomer, and a trifunctional monomer in a weight ratio of 4:3:2:1. The oligomer is epoxy acrylate; the monofunctional monomer is 4-acryloylmorpholine; the difunctional monomer is at least one of 1,6-hexanediol diacrylate and 1,6-hexanediol dimethacrylate; and the trifunctional monomer is at least one of propane trimethanol triacrylate and ethoxylated trimethylolpropane triacrylate. The combination of these monomers helps control and improve the slurry's fluidity and enhance its curing and crosslinking capabilities.

[0054] The photoinitiator includes any two or three of α-hydroxyisobutyrophenone, 1-hydroxycyclohexylphenyl ketone, phenyl bisphosphine oxide, and 2-isopropylthioxanthone. Mixing multiple photoinitiators helps to improve the slurry's ability to absorb ultraviolet light, and increasing its single-layer curing depth is conducive to printing molding.

[0055] The defoaming agent is one or both of BYK-1790 and BYK-1799; the leveling agent is one or more of BYK-333, BYK-UV3510 and BYK-UV3500; and the dispersant is an anionic polycarboxylate ammonium salt.

[0056] S3. Preparation of photocurable slurry: Place the mixed ceramic powder and mixed solution into an Al2O3 ball mill, add an appropriate amount of Al2O3 ball milling beads, and place the mixture in a planetary ball mill at 300-400 rpm for 3-6 hours. After ball milling, filter the mixture to obtain a black ceramic powder photocurable 3D printing slurry.

[0057] The black ceramic powder light-cured 3D printing slurry obtained by the above steps is three-dimensionally printed using an SLA printing device.

[0058] Example 1: Preparation of a black ceramic powder photocurable 3D printing slurry

[0059] (1) 100 g of CaMnO3 ceramic powder and 80 g of Al2O3 ceramic powder were weighed and added to an Al2O3 ball mill, and 180 g of anhydrous ethanol was weighed and added to the ball mill. An appropriate amount of Al2O3 ball milling beads were added to the ball mill. The mixture was then placed in a planetary ball mill and ball milled at a speed of 200 r / min for 3 h. After the ball milling was completed, the ball milling beads were filtered out using a metal mesh sieve, and then dried to obtain a mixed ceramic powder.

[0060] (2) 108 g of epoxy acrylate, 81 g of 4-acryloylmorpholine, 54 g of 1,6-hexanediol diacrylate and 27 g of trimethylolpropane triacrylate were weighed and mixed and stirred lightly with a glass rod to obtain a photosensitive resin mixed solution, and then 2.7 g of BYK-1790, BYK-333 and 4705 ammonium salt dispersants were added thereto. Subsequently, 6.75 g of α-hydroxyisobutyrophenone and 6.75 g of 1-hydroxycyclohexylphenyl ketone were weighed and added to the mixed solution, and the mouth of the beaker containing the mixed solution was sealed with plastic wrap to prevent the solution from volatilizing during the stirring process. Then, the mixture was placed on a magnetic stirrer and stirred at 40°C for 15 minutes. After the stirring was completed, a uniform mixed solution was obtained.

[0061] (3) The dried mixed ceramic powder and the mixed solution were placed in an Al2O3 ball milling jar, and an appropriate amount of Al2O3 ball milling beads were added. The mixture was placed in a planetary ball mill and ball milled at 300 r / min for 4 h. After the ball milling was completed, the ball milling beads were filtered out using a metal mesh sieve, and the slurry was collected to obtain a black ceramic powder light-curing 3D printing slurry.

[0062] Example 2: Preparation of a black ceramic powder photocurable 3D printing slurry

[0063] (1) 100 g of CaMnO3 ceramic powder and 80 g of Al2O3 ceramic powder were weighed and added to an Al2O3 ball mill, and 180 g of anhydrous ethanol was weighed and added to the ball mill. An appropriate amount of Al2O3 ball milling beads were added to the ball mill. The mixture was then placed in a planetary ball mill and ball milled at a speed of 200 r / min for 3 h. After the ball milling was completed, the ball milling beads were filtered out using a metal mesh sieve, and then dried to obtain a mixed ceramic powder.

[0064] (2) 108 g of epoxy acrylate, 81 g of 4-acryloylmorpholine, 54 g of 1,6-hexanediol diacrylate and 27 g of trimethylolpropane triacrylate were weighed and mixed and stirred lightly with a glass rod to obtain a photosensitive resin mixed solution, and then 2.7 g of BYK-1790, BYK-333 and 4705 ammonium salt dispersants were added thereto. Subsequently, 6.75 g of phenyl bisphosphine oxide and 6.75 g of 2-isopropylthioxanthone were weighed and added to the mixed solution, and the mouth of the beaker containing the mixed solution was sealed with plastic wrap to prevent the solution from volatilizing during the stirring process. Then, the mixture was placed on a magnetic stirrer and stirred at 40 ° C for 15 minutes. After the stirring was completed, a uniform mixed solution was obtained.

[0065] (3) The dried mixed ceramic powder and the mixed solution were placed in an Al2O3 ball milling jar, and an appropriate amount of Al2O3 ball milling beads were added. The mixture was placed in a planetary ball mill and ball milled at 300 r / min for 4 h. After the ball milling was completed, the ball milling beads were filtered out using a metal mesh sieve, and the slurry was collected to obtain a black ceramic powder light-curing 3D printing slurry.

[0066] Example 3: Preparation of a black ceramic powder photocurable 3D printing slurry

[0067] (1) 100 g of CaMnO3 ceramic powder and 80 g of Al2O3 ceramic powder were weighed and added to an Al2O3 ball mill, and 180 g of anhydrous ethanol was weighed and added to the ball mill. An appropriate amount of Al2O3 ball milling beads were added to the ball mill. The mixture was then placed in a planetary ball mill and ball milled at a speed of 200 r / min for 3 h. After the ball milling was completed, the ball milling beads were filtered out using a metal mesh sieve, and then dried to obtain a mixed ceramic powder.

[0068] (2) 108 g of epoxy acrylate, 81 g of 4-acryloylmorpholine, 54 g of 1,6-hexanediol dimethacrylate and 27 g of ethoxylated trimethylolpropane triacrylate were weighed and mixed and stirred lightly with a glass rod to obtain a photosensitive resin mixed solution. 2.7 g of BYK-1790, BYK-333 and 4705 ammonium salt dispersants were added thereto. Subsequently, 6.75 g of α-hydroxyisobutyrophenone and 6.75 g of 1-hydroxycyclohexylphenyl ketone were weighed and added to the mixed solution. The mouth of the beaker containing the mixed solution was sealed with plastic wrap to prevent the solution from volatilizing during the stirring process. The mixture was then placed on a magnetic stirrer and stirred at 40°C for 15 minutes. After the stirring was completed, a uniform mixed solution was obtained.

[0069] (3) The dried mixed ceramic powder and the mixed solution were placed in an Al2O3 ball milling jar, and an appropriate amount of Al2O3 ball milling beads were added. The mixture was placed in a planetary ball mill and ball milled at 300 r / min for 4 h. After the ball milling was completed, the ball milling beads were filtered out using a metal mesh sieve, and the slurry was collected to obtain a black ceramic powder light-curing 3D printing slurry.

[0070] Example 4: Preparation of a black ceramic powder photocurable 3D printing slurry

[0071] (1) 100 g of CaMnO3 ceramic powder and 100 g of Al2O3 ceramic powder were weighed and added to an Al2O3 ball mill, and 200 g of anhydrous ethanol was weighed and added to the ball mill. An appropriate amount of Al2O3 ball milling beads were added to the ball mill. The mixture was then placed in a planetary ball mill and ball milled at a speed of 200 r / min for 3 h. After the ball milling was completed, the ball milling beads were filtered out using a metal mesh sieve, and then dried to obtain a mixed ceramic powder.

[0072] (2) 120 g of epoxy acrylate, 90 g of 4-acryloylmorpholine, 60 g of 1,6-hexanediol diacrylate and 30 g of trimethylolpropane triacrylate were mixed and stirred lightly with a glass rod to obtain a photosensitive resin mixed solution, and then 3 g of BYK-1790, BYK-333 and 4705 ammonium salt dispersants were added thereto. Subsequently, 7.5 g of α-hydroxyisobutyrophenone and 7.5 g of 1-hydroxycyclohexylphenyl ketone were weighed and added to the mixed solution, and the mouth of the beaker containing the mixed solution was sealed with plastic wrap to prevent the solution from volatilizing during the stirring process. Then, the mixture was placed on a magnetic stirrer and stirred at 40 ° C for 15 minutes. After the stirring was completed, a uniform mixed solution was obtained.

[0073] (3) The dried mixed ceramic powder and the mixed solution were placed in an Al2O3 ball milling jar, and an appropriate amount of Al2O3 ball milling beads were added. The mixture was placed in a planetary ball mill and ball milled at 300 r / min for 4 h. After the ball milling was completed, the ball milling beads were filtered out using a metal mesh sieve, and the slurry was collected to obtain a black ceramic powder light-curing 3D printing slurry.

[0074] Example 5: Preparation of a black ceramic powder photocurable 3D printing slurry

[0075] (1) Weigh 100g of Ca 0.9 Gd 0.1MnO3 ceramic powder and 80g Al2O3 ceramic powder were added to an Al2O3 ball mill, and then 180g of anhydrous ethanol was weighed and added to the ball mill, and an appropriate amount of Al2O3 ball milling beads were added to the ball mill; then it was placed in a planetary ball mill and ball milled at a speed of 200r / min for 3h. After the ball milling was completed, the ball milling beads were filtered out with a metal mesh sieve, and then dried to obtain a mixed ceramic powder.

[0076] (2) 108 g of epoxy acrylate, 81 g of 4-acryloylmorpholine, 54 g of 1,6-hexanediol diacrylate and 27 g of trimethylolpropane triacrylate were mixed and stirred lightly with a glass rod to obtain a photosensitive resin mixed solution, and then 2.7 g of BYK-1790, BYK-333 and 4705 ammonium salt dispersants were added thereto. Subsequently, 6.75 g of α-hydroxyisobutyrophenone and 6.75 g of 1-hydroxycyclohexylphenyl ketone were weighed and added to the mixed solution. The mouth of the beaker containing the mixed solution was sealed with plastic wrap to prevent the solution from volatilizing during the stirring process. Then, the mixture was placed on a magnetic stirrer and stirred at 40°C for 15 minutes. After the stirring was completed, a uniform mixed solution was obtained.

[0077] (3) The dried mixed ceramic powder and the mixed solution were placed in an Al2O3 ball milling jar, and an appropriate amount of Al2O3 ball milling beads were added. The mixture was placed in a planetary ball mill and ball milled at 300 r / min for 4 h. After the ball milling was completed, the ball milling beads were filtered out using a metal mesh sieve, and the slurry was collected to obtain a black ceramic powder light-curing 3D printing slurry.

[0078] Example 6: Performance test of black ceramic powder light-curing 3D printing slurry in Examples 1-5

[0079] The photocurable slurries prepared in Examples 1-5 of the present invention were subjected to a single-layer curing depth test using an SLA photocuring printing device after an exposure time of 50 seconds; and the viscosity of the photocurable slurries was tested using a rotational viscometer.

[0080] The test results are shown in Table 1.

[0081] The test results show that the printing thickness of the black ceramic powder 3D printing photocuring slurry prepared by the present invention is greatly improved and can be printed and formed.

[0082] Table 1: Viscosity of light-curing slurry and single-layer curing depth test

[0083] Example Viscosity / mpa·s Single layer curing depth / μm Example 1 398 64 Example 2 427 59 Example 3 376 54 Example 4 346 76 Example 5 384 66

[0084] The above description is merely a preferred embodiment of the present application and an illustration of the technical principles employed. Those skilled in the art should understand that the scope of the invention herein is not limited to the technical solutions formed by the specific combination of the above-mentioned technical features, but also encompasses other technical solutions formed by any combination of the above-mentioned technical features or their equivalents without departing from the inventive concept. For example, the above-mentioned features may have similar functions to (but not limited to) those disclosed in this application.

Claims

1. A black ceramic powder light-curing 3D printing slurry, characterized in that: According to parts by weight, it includes the following components: 1000 parts of black ceramic powder, 700-1000 parts of auxiliary printing ceramic powder, 1700-3000 parts of photosensitive resin, 34-150 parts of photoinitiator, 17-60 parts of defoaming agent, 17-60 parts of leveling agent and 17-60 parts of dispersant; Also includes 1700-2000 parts of solvent; The auxiliary printing ceramic powder is a light-colored ceramic powder; The photosensitive resin is composed of oligomers, monofunctional monomers, difunctional monomers and trifunctional monomers; The black ceramic powder includes CaMnO3 and Ca 1-x Gd x One or two of MnO3; The Ca 1-x Gd x MnO3 is a rare earth element dopant of CaMnO3; The light-colored ceramic powder includes one or two of Al2O3 and ZrO2.

2. The black ceramic powder light-curing 3D printing slurry according to claim 1, characterized in that: The photosensitive resin comprises 35-45% of oligomers, 25-35% of monofunctional monomers, 15-25% of difunctional monomers and 5-15% of trifunctional monomers; The oligomer is at least one of epoxy acrylate or polyester acrylate; The monofunctional monomer is at least one of 4-acryloylmorpholine or 2-phenoxyethyl acrylate; The difunctional monomer is at least one of 1,6-hexanediol diacrylate and 1,6-hexanediol dimethacrylate; The trifunctional monomer is at least one of propane trimethanol triacrylate and ethoxylated trimethylolpropane triacrylate.

3. The black ceramic powder light-curing 3D printing slurry according to claim 1, characterized in that: The photoinitiator includes any two or three of α-hydroxyisobutyrophenone, 1-hydroxycyclohexylphenyl ketone, phenyl bisphosphine oxide, and 2-isopropylthioxanthone.

4. The black ceramic powder light-curing 3D printing slurry according to claim 1, characterized in that: The solvent is ethanol; The defoaming agent is one or both of BYK-1790 and BYK-1799; The leveling agent is one or more of BYK-333, BYK-UV3510, and BYK-UV3500; The dispersant is an anionic polycarboxylate ammonium salt.

5. The black ceramic powder light-curing 3D printing slurry according to any one of claims 1 to 4, characterized in that: The preparation comprises the following steps: S1: fully mixing black ceramic powder, auxiliary printing ceramic powder and solvent and then drying to obtain mixed ceramic powder; S2: fully mixing the photosensitive resin, photoinitiator, defoamer, leveling agent and dispersant to obtain a mixed solution; S3: The prepared mixed ceramic powder is fully mixed with the mixed solution to obtain a black ceramic powder light-curing 3D printing slurry.

6. A method for preparing a black ceramic powder light-curing 3D printing slurry, characterized in that: The steps include: S1: 1000 parts of black ceramic powder, 700-1000 parts of auxiliary printing ceramic powder, and 1700-2000 parts of solvent are fully mixed and dried to obtain a mixed ceramic powder; The auxiliary printing ceramic powder is one or two of Al2O3 and ZrO2; The black ceramic powder is CaMnO3 and Ca 1-x Gd x One or two of MnO3; The Ca 1-x Gd x MnO3 is a rare earth element dopant of CaMnO3; S2: thoroughly mixing 1700-3000 parts of a photosensitive resin, 34-150 parts of a photoinitiator, 17-60 parts of a defoaming agent, 17-60 parts of a leveling agent, and 17-60 parts of a dispersant to obtain a mixed solution; Wherein, the photosensitive resin is composed of oligomers, monofunctional monomers, difunctional monomers and trifunctional monomers; S3: The prepared mixed ceramic powder is fully mixed with the mixed solution to obtain a black ceramic powder light-curing 3D printing slurry.

7. The method for preparing a black ceramic powder light-curing 3D printing slurry according to claim 6, characterized in that: The particle size of the black ceramic powder is 2-5 μm; The auxiliary printing ceramic powder has a particle size of 300-400 nm.

8. The method for preparing a black ceramic powder light-curing 3D printing slurry according to claim 6, characterized in that: The photosensitive resin comprises 35-45% of oligomers, 25-35% of monofunctional monomers, 15-25% of difunctional monomers and 5-15% of trifunctional monomers; The oligomer is at least one of epoxy acrylate or polyester acrylate; The monofunctional monomer is at least one of 4-acryloylmorpholine or 2-phenoxyethyl acrylate; The difunctional monomer is at least one of 1,6-hexanediol diacrylate and 1,6-hexanediol dimethacrylate; The trifunctional monomer is at least one of propane trimethanol triacrylate and ethoxylated trimethylolpropane triacrylate; The photoinitiator includes any two or three of α-hydroxyisobutyrophenone, 1-hydroxycyclohexylphenyl ketone, phenyl bisphosphine oxide, and 2-isopropylthioxanthone; The solvent is ethanol; The defoaming agent is one or both of BYK-1790 and BYK-1799; The leveling agent is one or more of BYK-333, BYK-UV3510, and BYK-UV3500; The dispersant is an anionic polycarboxylate ammonium salt.

9. The method for preparing a black ceramic powder light-curing 3D printing slurry according to any one of claims 6 to 8, characterized in that: The step of fully mixing in step S1 includes using a ball mill at 200 r / min-250 r / min for 3-4 hours, the step of fully mixing in step S2 includes stirring at 40°C-45°C for 15-20 minutes on a magnetic stirrer, and the step of fully mixing in step S3 includes using a ball mill at 300 r / min-400 r / min for 3 hours to 6 hours.

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