Ceramic slurry for 3D printing, ceramic part and preparation method thereof

Abstract

The application provides a ceramic slurry for 3D printing, a ceramic part and a preparation method thereof, and belongs to the technical field of 3D printing. The ceramic slurry comprises a first component and a second component. The first component comprises ceramic powder and an organic binder. The content of the ceramic powder is 40% to 50% by volume, and the content of the organic binder is 50% to 60% by volume. The second component comprises a silane coupling agent, cellulose and an organic solvent. The content of the silane coupling agent is 35% to 45% by volume, the content of the cellulose is 35% to 45% by volume, and the content of the organic solvent is 10% to 30% by volume. The volume ratio of the first component to the second component is (1 to 3):1. The application improves the ceramic slurry, solves the problem that a gap is prone to appearing between lines / layers of a ceramic part in the printing link, and the density of the part is increased, and the application has the characteristics of wide application range, low cost and easy processing of complex shape ceramic parts.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of 3D printing, in particular to a ceramic slurry for 3D printing, a ceramic part and a preparation method thereof. BACKGROUND

[0002] Ceramic materials have excellent characteristics such as structural stability, wear resistance, corrosion resistance, high temperature resistance, and are widely used in engineering fields such as electronics, energy, aerospace, biomedicine, etc. However, due to the inherent brittleness and high crack sensitivity of ceramic materials, it is difficult to realize ceramic parts with complex shapes through traditional forming processes, which greatly limits the use of ceramic materials. The emergence of 3D printing technology provides an efficient and convenient method for obtaining complex multifunctional ceramic structures with integrated structure and function. Extrusion type 3D printing has the advantages of low printing cost, suitable for a wide range of material systems, simple and convenient operation, and fast printing speed, and is widely used in the field of 3D printing of ceramic parts.

[0003] However, in ceramic extrusion type 3D printing, ceramic powder is only bonded together at high temperature by organic binder. During the printing process, the insufficient fusion between layers due to the rapid cooling of the binder leads to low density of the printed parts. After increasing the solid content of the ceramic slurry, the ceramic powder is not uniformly dispersed due to its small particle size, and the ceramic viscosity becomes too large, which can easily cause local defects or damage to the model during 3D printing. Therefore, how to obtain a ceramic slurry with relatively high solid content and good flowability has become a key to improving the quality of 3D printed ceramic products and expanding their application fields. SUMMARY

[0004] The present application provides a ceramic slurry for 3D printing, a ceramic part and a preparation method thereof, which solves the technical problem of low density of existing 3D printed ceramic parts by preparing a ceramic slurry with relatively high solid content and good flowability.

[0005] In a first aspect, the present application provides a ceramic slurry for 3D printing, which comprises a first component and a second component.

[0006] The first component comprises ceramic powder and organic binder; wherein,

[0007] The content of the ceramic powder is 40% to 50% by volume, and the content of the organic binder is 50% to 60% by volume.

[0008] The second component comprises a silane coupling agent, cellulose and an organic solvent; wherein,

[0009] The content of the silane coupling agent is 35% to 45% by volume, the content of the cellulose is 35% to 45% by volume, and the content of the organic solvent is 10% to 30% by volume.

[0010] The volume ratio of the first component and the second component is (1-3):1.

[0011] Optionally, the ceramic powder comprises at least one of zirconium oxide, silicon carbide, yttrium oxide, aluminum oxide, and silicon nitride, and the organic binder comprises at least one of polyethylene, polyurethane, acrylate, and Texaphor 963.

[0012] Optionally, the silane coupling agent comprises at least one of aminopropyltriethoxysilane, N-β-(aminoethyl)-γ-aminopropyltrimethoxysilane, and 3-mercaptopropyltrimethoxysilane, the cellulose comprises at least one of chitin, lignin, and hydroxypropyl methyl cellulose, and the organic solvent comprises at least one of ethanol, acetone, and toluene.

[0013] Optionally, the average particle size of the cellulose is 10 μm to 100 μm, and the decomposition temperature of the cellulose is 200°C to 500°C.

[0014] In a second aspect, the present application provides a method for preparing a ceramic slurry for 3D printing, which is used for preparing the ceramic slurry of any one of the embodiments of the first aspect, and the method comprises:

[0015] Mixing the ceramic powder and the organic binder, and then stirring to obtain a first component;

[0016] Mixing the silane coupling agent, the cellulose, and the organic solvent, and then stirring to obtain a second component;

[0017] Mixing the first component and the second component, and then stirring to obtain the ceramic slurry.

[0018] In a third aspect, the present application provides a method for preparing a ceramic part, which comprises:

[0019] Establishing a three-dimensional model of a target ceramic part;

[0020] Establishing a layered slice scanning data path based on the three-dimensional model;

[0021] Placing the ceramic slurry of any one of the embodiments of the first aspect in a barrel of a 3D printer;

[0022] The 3D printer completes printing according to the path, and a green part is obtained after cooling;

[0023] Defatting and sintering the green part to obtain the ceramic part.

[0024] Optionally, the defatting comprises solvent defatting and thermal defatting, the solvent of the solvent defatting is n-pentane, and the peak temperature of the thermal defatting is 200-500 DEG C.

[0025] Optionally, the peak temperature of the sintering is 600-1500 DEG C.

[0026] Optionally, the line width of the slice is 0.3-0.6 mm.

[0027] In a fourth aspect, the application provides a ceramic part, which is obtained by the method for preparing the ceramic part according to any one of the third aspect.

[0028] Compared with the prior art, the above technical solution provided by the embodiments of the application has the following advantages:

[0029] The application provides a ceramic slurry for 3D printing, a ceramic part and a preparation method thereof, and the silane coupling agent is used as a connecting bridge to ensure uniform dispersion of ceramic powder on the surface of cellulose and reduce the generation of ceramic powder agglomeration.

[0030] In addition, the specific heat capacity of cellulose is smaller than that of ceramic, the heat dissipation speed is slower during printing, the semi-curing time of the printed line / slice is prolonged, the temperature of the printed line / slice is ensured to be unchanged within a certain time range, the self-adhesion of the slurry is utilized to promote the close lapping between lines / layers; cellulose has natural hydrophilicity and high strength and high modulus, the surface has strong gripping force, the fiber monofilament can play a crack resistance effect, the mechanical properties of the ceramic slurry are effectively improved, and the line is ensured not to be deformed during printing; cellulose is not dissolved in general organic solvents, and is used as a support for a ceramic embryo to prevent the collapse of the part embryo during defatting; during high-temperature sintering, the line lapping of the ceramic green part is close without gaps, and the porosity of the ceramic part is reduced after sintering.

[0031] In conclusion, the application solves the problem that gaps are prone to appear between lines / layers of a ceramic part during the printing process, which increases the density of the part, by improving the ceramic slurry, and the application has the characteristics of wide application range, low cost and easy processing of complex-shaped ceramic parts. BRIEF DESCRIPTION OF DRAWINGS

[0032] The accompanying drawings, which are incorporated into and form a part of the specification, illustrate one embodiment consistent with the application and, together with the description, serve to explain the principles of the application.

[0033] In order to more clearly illustrate the technical solutions in the embodiments of the present application or the prior art, the accompanying drawings needed to be used in the embodiments or prior art description will be briefly introduced as follows. Obviously, for those of ordinary skill in the art, the other drawings can also be obtained based on these drawings without any creative work.

[0034] Figure 1 A flowchart of a preparation method of a ceramic slurry for 3D printing provided by the embodiment of the present application;

[0035] Figure 2 A flowchart of a preparation method of a ceramic part provided by the embodiment of the present application;

[0036] Figure 3 A schematic diagram of internal chemical reactions of a ceramic slurry provided by the embodiment of the present application;

[0037] Figure 4 A schematic diagram of internal chemical reactions of a ceramic slurry for 3D printing by a conventional method;

[0038] Figure 5 A schematic diagram of a printing process of a ceramic slurry provided by the embodiment of the present application;

[0039] Figure 6 A schematic diagram of a printing process of a ceramic slurry prepared by a conventional method;

[0040] Figure 7 A schematic diagram of chemical reactions between lines / layers of a 3D printed ceramic green part provided by the embodiment of the present application;

[0041] Figure 8 A schematic diagram of chemical reactions between lines / layers of a 3D printed ceramic green part provided by the embodiment of the present application;

[0042] Figure 9 A schematic diagram of debinding of a ceramic part provided by the embodiment of the present application;

[0043] Figure 10 A schematic diagram of debinding of a 3D printed ceramic part by a conventional method;

[0044] Figure 11 A schematic diagram of the inside of a ceramic part provided by the embodiment of the present application;

[0045] Figure 12 A schematic diagram of the inside of a 3D printed ceramic part by a conventional method;

[0046] Reference: 1, cellulose particles; 2, ceramic particles; 3, silane coupling agent connecting cellulose and ceramic particles after chemical reaction; 4, organic binder; 5, 3D printing nozzle; 6, ceramic slurry provided by the present application; 7, part of the overlap between lines / layers; 8, ceramic slurry prepared by conventional method; 9, voids between lines / layers printed by conventional method; 10, upper structure of ceramic green body slice; 11, lower structure of ceramic green body slice; 12, interlayer hole; 13, schematic internal channel; 14, generated defects. DETAILED DESCRIPTION

[0047] To make the objectives, technical solutions and advantages of the embodiments of the present application clearer, the technical solutions in the embodiments of the present application will be described clearly and completely below with reference to the drawings in the embodiments of the present application. Obviously, the described embodiments are only a part of the embodiments of the present application, rather than all the embodiments of the present application. Based on the embodiments in the present application, all other embodiments obtained by a person of ordinary skill in the art without creative work fall within the scope of protection of the present application.

[0048] Various embodiments of the present application can exist in the form of a range; it should be understood that the description in the form of a range is merely for the convenience and brevity, and should not be understood as a hard limitation on the scope of the present application; therefore, it should be considered that the described range has specifically disclosed all possible sub-ranges and single values within the range. For example, it should be considered that the range description from 1 to 6 has specifically disclosed sub-ranges, such as from 1 to 3, from 1 to 4, from 1 to 5, from 2 to 4, from 2 to 6, from 3 to 6, etc., as well as single numbers within the described range, such as 1, 2, 3, 4, 5 and 6, which applies to any range. In addition, whenever a numerical range is indicated in this document, it refers to any cited number (fraction or integer) within the indicated range.

[0049] In addition, in the description of the present application, the terms "comprising", "including", etc. mean "including but not limited to". In this text, the relationship terms such as "first" and "second" are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any such actual relationship or order between the entities or operations. In this text, "and / or" describes the association relationship of the associated objects, which means that there can be three relationships, for example, A and / or B can represent: the case of A alone, the case of A and B existing at the same time, and the case of B alone. Wherein A, B can be singular or plural. In this text, "at least one" means one or more, and "multiple" means two or more. "At least one", "at least one of the following" or the like means any combination of these items, including any combination of single or multiple items. For example, "at least one of a, b, or c", or "at least one of a, b, and c", can represent a, b, c, a-b (i.e. a and b), a-c, b-c, or a-b-c, where a, b, and c can be single or multiple.

[0050] Unless otherwise specified, the various raw materials, reagents, instruments and equipment used in the present application can be purchased on the market or can be prepared by existing methods.

[0051] In a first aspect, the present application provides a ceramic slurry for 3D printing, which comprises a first component and a second component.

[0052] The first component comprises ceramic powder and an organic binder; wherein,

[0053] The content of the ceramic powder is 40% to 50% by volume, and the content of the organic binder is 50% to 60% by volume.

[0054] The second component comprises a silane coupling agent, cellulose, and an organic solvent; wherein,

[0055] The content of the silane coupling agent is 35% to 45% by volume, the content of the cellulose is 35% to 45% by volume, and the content of the organic solvent is 10% to 30% by volume.

[0056] The volume ratio of the first component and the second component is (1-3):1.

[0057] The positive effect of controlling the content of the ceramic powder to be 40% to 50% by volume and the content of the organic binder to be 50% to 60% by volume is that the volume fraction of the ceramic powder is determined to be 40% to 50%. If the loading rate of the ceramic powder is too high, the ceramic powder may be agglomerated during the mixing process. If the loading rate of the ceramic powder is too low, the green body of the ceramic may be collapsed during the process of thermal debinding, and the ceramic part obtained finally may have a high porosity and large defects. The content of the ceramic powder may be 40% by volume, 42% by volume, 44% by volume, 46% by volume, 48% by volume, 50% by volume, etc. The content of the organic binder may be 50% by volume, 52% by volume, 54% by volume, 56% by volume, 58% by volume, 60% by volume, etc.

[0058] The positive effect of controlling the content of the silane coupling agent to be 35% to 45% by volume, the content of the cellulose to be 35% to 45% by volume, and the content of the organic solvent to be 10% to 30% by volume is that the cellulose and the silane coupling agent need to be uniformly dispersed in a certain organic solvent and chemically react according to a volume ratio of 1:1. The content of the silane coupling agent may be 35% by volume, 37% by volume, 39% by volume, 41% by volume, 43% by volume, 45% by volume, etc. The content of the cellulose may be 35% by volume, 37% by volume, 39% by volume, 41% by volume, 43% by volume, 45% by volume, etc. The content of the organic solvent may be 10% by volume, 13% by volume, 16% by volume, 19% by volume, 22% by volume, 25% by volume, 28% by volume, 30% by volume, etc.

[0059] The volume ratio of the first component and the second component may be 1:1, 1.5:1, 2:1, 2.5:1, 3:1, etc.

[0060] In some embodiments, the ceramic powder includes at least one of zirconium oxide, silicon carbide, yttrium oxide, aluminum oxide, and silicon nitride, and the organic binder includes at least one of polyethylene, polyurethane, acrylate, and Texaphor 963.

[0061] In some embodiments, the silane coupling agent includes at least one of aminopropyl triethoxysilane (KH550), N-β-(aminoethyl)-γ-aminopropyl trimethoxysilane (KH792), and 3-mercaptopropyl trimethoxysilane, the cellulose includes at least one of chitin, lignin, and hydroxypropyl methyl cellulose, and the organic solvent includes at least one of ethanol, acetone, and toluene.

[0062] In some embodiments, the average particle size of the cellulose is 10 μm to 100 μm, and the decomposition temperature of the cellulose is 200°C to 500°C.

[0063] The positive effect of controlling the average particle size of cellulose to be 10-100 μm: the average particle size of cellulose is between 10-100 μm, which is not much different from the average particle size of ceramic powder, ensuring uniform mixing in the subsequent process. And in the process of thermal debinding, the cellulose is removed, leaving a small sintering channel gap, which ensures that the green body is not easy to collapse. The average particle size of the cellulose can be 10 μm, 30 μm, 50 μm, 70 μm, 90 μm, 100 μm, etc.

[0064] The positive effect of controlling the decomposition temperature of cellulose to be 200-500 ℃: the ceramic green body post-processing first carries out solvent debinding, and then carries out thermal debinding to remove the binder and silane coupling agent. The decomposition temperature of the binder and silane coupling agent is 200-500 ℃. Controlling the decomposition temperature of cellulose in the range of 200-500 ℃ ensures that cellulose can be completely decomposed in the thermal debinding stage. The decomposition temperature of the cellulose can be 200 ℃, 250 ℃, 300 ℃, 350 ℃, 400 ℃, 450 ℃, 500 ℃, etc.

[0065] In a second aspect, the present application provides a preparation method of a ceramic slurry for 3D printing, please see Figure 1 for preparing the ceramic slurry of any one of the embodiments of the first aspect, the method comprising:

[0066] S11, mixing ceramic powder and organic binder, and then stirring to obtain a first component;

[0067] S12, mixing silane coupling agent, cellulose and organic solvent, and then stirring to obtain a second component;

[0068] S13, mixing the first component and the second component, and then stirring to obtain a ceramic slurry.

[0069] In a third aspect, the present application provides a preparation method of a ceramic part, please see Figure 2 comprising:

[0070] S21, establishing a three-dimensional model of a target ceramic part;

[0071] S22, establishing a layered slicing scanning data path based on the three-dimensional model;

[0072] In some embodiments, the line width of the slice is 0.3-0.6 mm.

[0073] The line width of the slice can be 0.3 mm, 0.4 mm, 0.5 mm, 0.6 mm, etc.

[0074] S23, placing the ceramic slurry of any one of the embodiments of the first aspect in the barrel of the 3D printer;

[0075] S24, the 3D printer completes printing according to the path, and a green part is obtained after cooling;

[0076] S25, the green part is debound and sintered to obtain a ceramic part.

[0077] In some embodiments, the debinding includes solvent debinding and thermal debinding, the solvent of the solvent debinding is n-pentane, and the peak temperature of the thermal debinding is 200-500 ℃.

[0078] The positive effect of controlling the peak temperature of the thermal debinding to be 200-500 ℃ is that the ceramic green part is post-processed first by solvent debinding, and then by thermal debinding to remove the binder and the silane coupling agent, and the decomposition temperature of the binder and the silane coupling agent is 200-500 ℃. The peak temperature of the thermal debinding can be 200 ℃, 250 ℃, 300 ℃, 400 ℃, 450 ℃, 500 ℃, etc.

[0079] In some embodiments, the peak temperature of the sintering is 600-1500 ℃.

[0080] The positive effect of controlling the peak temperature of the sintering to be 600-1500 ℃ is that the sintering temperature of the ceramic powder is between 600 ℃ and 1500 ℃. The peak temperature of the sintering can be 600 ℃, 700 ℃, 800 ℃, 1000 ℃, 1200 ℃, 1400 ℃, 1500 ℃, etc.

[0081] In a fourth aspect, the present application provides a ceramic part, which is obtained by the method for preparing a ceramic part according to any one of the embodiments of the third aspect.

[0082] The present application will be further described in conjunction with specific examples. It should be understood that these examples are only used to illustrate the present application and not used to limit the scope of the present application. The experimental methods not specified in the following examples are generally determined according to the national standards. If there is no corresponding national standard, the international standard, the conventional condition, or the condition suggested by the manufacturer is used.

[0083] Example 1

[0084] The embodiments of the present application include the following steps:

[0085] S211, a CAD software is selected to construct a three-dimensional model of a target ceramic part, and then an STL format model of a target embryo is established, and the three-dimensional model is sliced and layered by a computer software.

[0086] S221, preferably ceramic powder is alumina, preferably the binder is a mixture of low-density polyethylene and stearic acid; wherein the average particle size of the alumina powder is 500 nm, and the first component is prepared by mixing 45% of the alumina powder and 55% of the organic binder in volume ratio by mechanical stirring.

[0087] S231, the 3D printer completes 3D printing according to the set path. After the printing process is completed, the green part is cooled at room temperature to complete the tight lapping between layers / lines or lines / lines, and then a fixed shape is formed.

[0088] S241, n-pentane is selected to perform solvent debinding on the green part, and the silane coupling agent amino propyl triethoxysilane (KH550) and part of the organic binder are removed at room temperature, and the chitin fiber is used as a support to ensure that the green part is not easy to collapse; after solvent debinding, thermal debinding is performed again, the temperature is set to 450 ℃, the heating rate is 2 ℃ / min; sintering is performed, the sintering peak temperature is 1500 ℃, the heating rate is 5 ℃ / min, and the holding time is 3 h, and the sintering is completed.

[0089] The part is dense inside, has no obvious defects, and the porosity is less than 0.2%.

[0090] Example 2

[0091] The embodiment can be used for multi-nozzle 3D printing to improve the lapping rate between multiple materials. The embodiment of the application comprises the following steps:

[0092] S211, CAD software is selected to construct a three-dimensional model of the target ceramic part, and then an STL format model of the target embryo is established.

[0093] S221, the three-dimensional model is sliced and layered by computer software.

[0094] S231. For dual-head printing, the preferred ceramic powders are silicon carbide and silicon nitride, and the preferred binder is a homogeneous mixture of low-density polyethylene and stearic acid. The silicon carbide powder has an average particle size of 200 μm. A homogeneous first component is prepared by mechanically mixing 50% silicon carbide powder and 50% organic binder by volume. The preferred cellulose is lignin fiber, the preferred silane coupling agent is aminopropyltriethoxysilane (KH550), and the preferred solvent is ethanol. The lignin fiber has an average particle size of 500 μm. A second component is prepared by mechanically mixing 40% lignin fiber, 40% aminopropyltriethoxysilane (KH550), and 20% ethanol by volume. The first and second components are then ball-milled at high speed in a planetary ball mill for 1 h to obtain silicon carbide ceramic slurry 1. The silicon nitride powder has an average particle size of 200 μm. A homogeneous third component is prepared by mechanically mixing 50% silicon nitride powder and 50% organic binder by volume. The preferred cellulose is lignin fiber, the silane coupling agent is aminopropyltriethoxysilane (KH550), and the solvent is ethanol; the average particle size of the lignin fiber is 500 μm. A fourth component is prepared by mechanically mixing 40% lignin fiber, 40% aminopropyltriethoxysilane (KH550), and 20% ethanol solvent by volume ratio. The third and fourth components are then added to a planetary ball mill and ball-milled at high speed for 1 h to obtain silicon nitride ceramic slurry 2. Slurries 1 and 2 are placed in two separate containers.

[0095] The S241 3D printer completes silicon nitride and silicon carbide 3D printing respectively according to the set path. Due to the presence of lignin cellulose, the temperature loss rate between silicon carbide and silicon nitride lines is slower, resulting in better overlap between the two ceramics. After the printing process is completed, the green part is cooled at room temperature to achieve tight overlap between layers or lines, and then forms a fixed shape.

[0096] S251. Hexane was used to solvent degrease the green parts, removing the silane coupling agent aminopropyltriethoxysilane (KH550) and some organic binders at room temperature. Lignin fibers served as a support to prevent the green parts from collapsing. After solvent degreasing, thermal degreasing was performed at a temperature of 500 ℃ and a heating rate of 2 ℃ / min. Sintering was then carried out at a peak temperature of 1600 ℃ and a heating rate of 5 ℃ / min, with a holding time of 4 h. Sintering was then completed.

[0097] The parts constructed from the two ceramic materials are dense internally, without obvious defects, and have a porosity of less than 0.5%.

[0098] Appendix Figures 3-9 Detailed explanation:

[0099] like Figure 3As shown, it is shown that the silane coupling agent as a connection "bridge", the reaction group and the ceramic particles and cellulose surface hydroxyl group are reacted respectively, and stable chemical bond is formed, which ensures that the ceramic particles and cellulose are uniformly dispersed in the slurry mixing process, and the agglomeration phenomenon is avoided to affect the subsequent 3D printing experiment effect.

[0100] As shown in Figure 4 , it is shown that the conventional ceramic slurry preparation directly disperses the ceramic powder particles with small particle size in the organic binder, which leads to uneven dispersion of the ceramic powder in the slurry, and the pores of the printed green part after high-temperature sintering are large, and the method of the present application utilizes the presence of silane coupling agent and cellulose to better help the stable dispersion of ceramic powder in the slurry.

[0101] As shown in Figure 5 , because the specific heat capacity of cellulose is less than that of ceramic powder, the temperature loss rate between the printed embryo lines / layers is slow, which ensures the lap joint rate between the embryo lines / layers under the semi-cured condition, and improves the density of the final sintered part.

[0102] As shown in Figure 6 , in the process of printing ceramic green part by conventional method, due to the too fast cooling speed of the line, the lap joint degree between the lines / layers is not high, and the sintered part will produce holes.

[0103] As shown in Figure 9 , in the solvent debinding process, the silane coupling agent will be decomposed under the action of organic solvent, the molecular chain will be broken, and internal debinding channels will be formed; cellulose is not soluble in ordinary organic solvents, and due to the rigid characteristics of cellulose, it can be used as a supporting structure to effectively prevent the internal collapse of the green body during the solvent debinding process.

[0104] The above is only a specific embodiment of the present application, which enables those skilled in the art to understand or implement the present application. Various modifications to these embodiments will be apparent to those skilled in the art, and the general principles defined herein can be implemented in other embodiments without departing from the spirit or scope of the present application. Therefore, the present application will not be limited to these embodiments shown herein, but will conform to the widest scope consistent with the principles and novel features applied herein.

Claims

1. A ceramic slurry for 3D printing, characterized by, The ceramic slurry comprises a first component and a second component; The first component comprises ceramic powder and organic binder; wherein, The content of the ceramic powder is 40%~50% by volume, and the content of the organic binder is 50%~60% by volume; The second component comprises silane coupling agent, cellulose and organic solvent; wherein, The content of the silane coupling agent is 35%~45% by volume, the content of the cellulose is 35%~45% by volume, and the content of the organic solvent is 10%~30% by volume; The volume ratio of the first component and the second component is (1~3):1; The ceramic powder comprises at least one of zirconium oxide, silicon carbide, yttrium oxide, aluminum oxide and silicon nitride, and the organic binder comprises at least one of polyethylene, polyurethane and Texaphor 963; The silane coupling agent comprises at least one of aminopropyltriethoxysilane, N-β-(aminoethyl)-γ-aminopropyltrimethoxysilane and 3-mercaptopropyltrimethoxysilane, the cellulose comprises at least one of chitin, lignin and hydroxypropyl methyl cellulose, and the organic solvent comprises at least one of ethanol, acetone and toluene; The average particle size of the cellulose is 10μm~100μm, and the decomposition temperature of the cellulose is 200℃~500℃.

2. A method for preparing a ceramic slurry for 3D printing, characterized in that, The method for preparing the ceramic slurry of claim 1 comprises: Mixing ceramic powder and organic binder, and then stirring to obtain a first component; Mixing silane coupling agent, cellulose and organic solvent, and then stirring to obtain a second component; Mixing the first component and the second component, and then stirring to obtain a ceramic slurry.

3. A method of producing a ceramic part, characterized in that, Comprise: Establishing a three-dimensional model of a target ceramic part; Establishing a layered slicing scanning data path based on the three-dimensional model; Placing the ceramic slurry of claim 1 in a cartridge of a 3D printer; The 3D printer prints according to the path, and after cooling, a green part is obtained; Defatting and sintering the green part to obtain a ceramic part.

4. The method for producing a ceramic part according to claim 3, characterized in that, The defatting comprises solvent defatting and thermal defatting, the solvent for the solvent defatting is n-pentane, and the peak temperature for the thermal defatting is 200℃~500℃.

5. The method for producing a ceramic part according to claim 3, characterized in that, The peak temperature for the sintering is 600℃~1500℃.

6. The method for producing a ceramic part according to claim 3, characterized in that, The line width of the slice is 0.3mm~0.6mm.

7. A ceramic part, characterized by, The ceramic part is obtained by the preparation method of the ceramic part of any one of claims 3~6.

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