Ceramic wedge and method of making same

Abstract

The application belongs to the technical field of ceramics, and particularly discloses a ceramic wedge and a preparation method thereof. The application can greatly increase the compatibility between the alumina-based ceramic powder and the photocuring resin, improve the dispersibility of the alumina-based ceramic powder in the slurry, reduce the sedimentation, and achieve the purpose of improving the strength of the ceramic wedge blank after photocuring.

Description

Technical Field

[0001] This invention belongs to the field of ceramic technology, specifically relating to a ceramic chopping knife and its preparation method. Background Technology

[0002] Ceramic wedges are essential consumables in semiconductor packaging, primarily used for wire bonding of gold, silver, and alloy wires in IC packaging. Alumina-based ceramic powders, such as ZTA (zirconia-toughened alumina) powder and ruby ​​ceramic powder, are used in the manufacture of ceramic wedges as high-quality ceramic materials with corrosion resistance, high temperature resistance, and wear resistance. Generally, ceramic slurry is molded to obtain a ceramic wedge blank, which is then debinded and sintered to obtain the ceramic wedge (the finished ceramic body). Most existing ceramic wedges are produced using injection molding, aiming to obtain wedges with high precision and good mechanical properties through the cooperation of feeding and molds. However, limitations in mold processing and precision during injection molding make it difficult to significantly improve the precision and reduce processing costs of ceramic wedge production.

[0003] With the maturity of 3D printing technology, rapid prototyping technology combining 3D printing and photopolymerization is now relatively mature. Depending on the light source used, photopolymerization 3D printing technology can be further divided into two types: stereolithography (SLA) and digital light processing (DLP). Photopolymerization 3D printing technology effectively solves the problems of single molds, high cost, and low precision in traditional injection molding. The slurry used in photopolymerization 3D printing mainly consists of photopolymerizable resin. When preparing ceramic products such as ceramic cleavers, ceramic powder is also required. The dispersibility of the slurry is fundamental to the strength of the formed ceramic product. Due to the inherent properties of the materials, inorganic materials such as ceramic powder have poor compatibility with organic materials such as photopolymerizable resin, resulting in poor slurry dispersibility and unsatisfactory strength of the formed ceramic blank.

[0004] Existing technologies modify ceramic powders to improve their compatibility with photocurable resins. Currently, most ceramic powder surface modification methods involve using molecules with active functional groups (such as silane coupling agents) to chemically react with the hydroxyl or carboxyl groups on the ceramic powder surface, forming chemical bonds or intermolecular forces. However, this method involves few active sites, and the bonds or intermolecular forces between the molecules with active functional groups and the ceramic powder surface are only at a few sites, resulting in weak bonding. This leads to poor strength and other properties in ceramic wedge blanks produced by existing photocurable 3D printing. Furthermore, due to the poor compatibility between ceramic powder and photocurable resin, the ceramic slurry is prone to sedimentation and uneven density during the photocurable 3D printing process, resulting in poor dimensional accuracy of the ceramic wedge blanks. Summary of the Invention

[0005] In view of the problems of poor slurry dispersion, poor strength of ceramic chopping blanks, and poor dimensional accuracy of ceramic chopping blanks in the above-mentioned existing technologies, the present invention will provide a ceramic chopping blade and its preparation method.

[0006] To achieve the above objectives, the following technical solutions are specifically included:

[0007] A method for preparing modified alumina-based ceramic powder includes the following steps:

[0008] (1) Disperse alumina-based ceramic powder in water to obtain an alumina-based ceramic powder dispersion system;

[0009] (2) Adjust the pH value of the alumina-based ceramic powder dispersion system, add an ionic surfactant and stir, and then add an oil-soluble monomer and a photoinitiator in sequence;

[0010] (3) Modified alumina-based ceramic powder is obtained by photo-initiated polymerization reaction, followed by water washing and drying.

[0011] This invention mainly achieves the modification of alumina-based ceramic powder through the following process: (a) By adjusting the pH value of the alumina-based ceramic powder dispersion system to be lower or higher than the zero charge point (PZC) of the alumina-based ceramic powder, the surface of the alumina-based ceramic powder is made to carry a positive or negative charge; ionic surfactants, including anionic surfactants and cationic surfactants, are added to the above dispersion system. Due to the charge effect, the ionic surfactants will spontaneously adsorb onto the surface of the alumina-based ceramic powder. After adsorbing a layer of ionic surfactant, the hydrophobic end faces outward, and at this time it is in an unstable state. Therefore, it will spontaneously adsorb onto the alumina-based ceramic powder. (a) An additional layer of ionic surfactant is adsorbed on the surface of the powder, forming a bilayer. The hydrophilic layer faces the water and the powder surface respectively, and a hydrophobic layer is formed in the middle of the bilayer. (b) After adding an oil-soluble monomer to the system, the oil-soluble monomer enters the middle of the bilayer on the powder surface and reaches a stable state. (c) A photoinitiator is then added to the system. Light can initiate monomer polymerization, which occurs between the bilayers to form a polymer coating the powder surface. (d) After washing with water, excess surfactant and unreacted monomers on the powder surface are washed away, and the surface modification of alumina-based ceramic powder is successfully achieved. A schematic diagram of the surface modification mechanism is attached. Figure 1 As shown.

[0012] This invention utilizes micellar polymerization to coat the surface of individual alumina-based ceramic powder particles with a polymer layer. This polymer completely coats the powder surface, achieving surface modification of the alumina-based ceramic powder. The presence of a thin polymer layer on the surface of the modified alumina-based ceramic powder significantly increases its compatibility with photocurable resins, improves powder dispersibility in slurries, reduces sedimentation, and ultimately enhances the strength of the photocured ceramic cleaver blank and improves the dimensional accuracy of the ceramic cleaver body.

[0013] Preferably, the ionic surfactant accounts for 0.4-1.2% of the mass of the alumina-based ceramic powder.

[0014] More preferably, the ionic surfactant accounts for 0.5-0.7% of the mass of the alumina-based ceramic powder.

[0015] Preferably, the oil-soluble monomer accounts for 0.6-5% of the mass of the alumina-based ceramic powder.

[0016] More preferably, the oil-soluble monomer accounts for 1-3% of the mass of the alumina-based ceramic powder.

[0017] Preferably, the photoinitiator accounts for 0.2-2% of the mass of the alumina-based ceramic powder.

[0018] More preferably, the photoinitiator accounts for 1-1.5% of the mass of the alumina-based ceramic powder.

[0019] The ratio of alumina-based ceramic powder to ionic surfactants or oil-soluble monomers affects the surface modification effect of the alumina-based ceramic powder. By controlling the ratio, a complete polymer layer can be formed on the powder surface, resulting in a robust and reliable coating structure. If the amount of ionic surfactant is too small, it will be difficult to form a complete bilayer on the surface of the alumina-based ceramic powder particles; similarly, if the content of oil-soluble monomer is too small, it will be difficult to form a complete coating layer. Both of these situations will result in insufficient or incomplete coating coverage on the powder particle surface, leading to a lack of significant improvement in compatibility with photocurable resins. The material's dispersibility remains poor, affecting the strength of the green body and the dimensional accuracy of the ceramic body. If too much ionic surfactant is used (above the critical micelle concentration), excess micelles are easily formed in water (not on the powder surface). This can lead to micellar polymerization of oil-soluble monomers in water during subsequent polymerization, or if the content of oil-soluble monomers is too high and reaches saturation, they cannot enter the bilayer and may polymerize in water later. Both of these situations will result in some polymer particles mixed into the modified powder, which are difficult to separate. Due to the small amount and light weight of polymer particles, they are not evenly dispersed in the slurry, resulting in poor slurry stability and uneven density between the upper and lower layers, ultimately leading to poor dimensional accuracy of the ceramic body formed by the cleaver.

[0020] Preferably, the ionic surfactant includes at least one of sodium dodecyl sulfate and hexadecyltrimethylammonium chloride.

[0021] Preferably, the alumina-based ceramic powder comprises alumina, zirconium oxide, and chromium trioxide, and the mass ratio of alumina, zirconium oxide, and chromium trioxide is alumina:zirconia:chromium trioxide = (65-95):(2-30):(0.5-5).

[0022] Preferably, the oil-soluble monomer includes at least one of methyl acrylate, amino acrylate, and epoxy acrylate.

[0023] Oil-soluble monomers polymerize on the surface of powder to form polymers. These polymers can be resins that are the same as or similar to photocurable resins, or they can be resins that are compatible with or reactive with photocurable resins. The above-mentioned types of oil-soluble monomers exhibit good compatibility with conventional photocurable resins after polymerization, which can greatly improve the compatibility between powder and photocurable resin, enhance the dispersibility of powder in slurry, reduce sedimentation, and simultaneously improve the strength of the photocured green body and the dimensional accuracy of the ceramic body formed by ceramic cutting tools.

[0024] Preferably, the photoinitiator includes at least one of benzophenone, benzoyl dimethyl ether, 2-hydroxy-2-methyl-1-phenyl-1-propanone, 1-hydroxycyclohexyl benzophenone, benzophenone, 2,4,6-(trimethylbenzoyl)diphenylphosphine oxide, and phenylbis(2,4,6-trimethylbenzoyl)phosphine oxide.

[0025] Preferably, the stirring time is 20-40 minutes.

[0026] Preferably, the drying is vacuum freeze drying, the temperature of the vacuum freeze drying is -40 to -10°C, the vacuum degree of the vacuum freeze drying is 13 to 40 Pa, and the time of the vacuum freeze drying is 1 to 2 hours.

[0027] Preferably, when adjusting the pH value of the alumina-based ceramic powder dispersion system, the pH value of the alumina-based ceramic powder dispersion system is less than or greater than the zero charge point of the alumina-based ceramic powder, which can be determined by the zeta potential method.

[0028] The modified alumina-based ceramic powder prepared by the method of the present invention has a content of 100 wt% and the surface of the modified alumina-based ceramic powder is coated with 0.5-3.3 wt% polymer, which can effectively improve the dispersibility of the alumina-based ceramic powder.

[0029] A ceramic chopping knife is made by photopolymerization 3D printing of a ceramic slurry. The ceramic slurry comprises the following components in weight percentage: 30-60% modified alumina-based ceramic powder, 30-50% oligomer, 5-20% diluent, and 0.2-1% photoinitiator.

[0030] Under the above-mentioned component ratio of ceramic slurry, the ceramic slurry has good dispersibility and stability, which enables the ceramic cleaver blank formed by photopolymerization 3D printing to have high strength.

[0031] Excessive content of modified alumina-based ceramic powder results in a high solids content, high viscosity, poor fluidity, and difficulty in uniform dispersion, leading to density variations and ultimately poor dimensional accuracy of the sintered ceramic body. Conversely, excessively high content of modified alumina-based ceramic powder also leads to a high content of coated polymers in the system, increasing the contact area with the resin matrix, enhancing bonding strength, and resulting in excessively high slurry viscosity, making uniform dispersion difficult and also causing poor dimensional accuracy of the sintered ceramic body. Conversely, insufficient content of modified alumina-based ceramic powder decreases slurry viscosity and stability, resulting in significant dimensional differences at different locations in the sintered ceramic body and poor accuracy. Furthermore, insufficient content of modified alumina-based ceramic powder leads to insufficient content of coated polymers, poor compatibility with the photocurable resin, and a tendency for slurry sedimentation, resulting in poor slurry stability and also contributing to poor dimensional accuracy of the sintered ceramic body.

[0032] Preferably, the oligomer includes at least one of polyester acrylate, polyether acrylate, polyurethane acrylate, and epoxy acrylate.

[0033] The aforementioned oligomers, as photocurable resins for 3D printing, exhibit better compatibility with other components.

[0034] Preferably, the diluent includes at least one of methacrylate, phenoxyethanol, glycerin, polyethylene glycol, and dibutyl phthalate.

[0035] Preferably, the photoinitiator includes at least one of benzophenone, benzoyl dimethyl ether, 2-hydroxy-2-methyl-1-phenyl-1-propanone, 1-hydroxycyclohexyl benzophenone, benzophenone, 2,4,6-(trimethylbenzoyl)diphenylphosphine oxide, and phenylbis(2,4,6-trimethylbenzoyl)phosphine oxide.

[0036] Preferably, the mass ratio of the modified alumina-based ceramic powder to the oligomer is (30-60):(30-50). Under the above mass ratio, the ceramic slurry has better dispersibility and stability.

[0037] A method for preparing the ceramic chopping knife includes the following steps:

[0038] (1) The modified alumina-based ceramic powder, oligomer, diluent and photoinitiator are mixed and degassed to obtain a ceramic slurry;

[0039] (2) Using the ceramic slurry as a 3D printing material, a ceramic chopping blade blank is printed by photopolymerization 3D printing technology;

[0040] (3) The ceramic chopping blade blank is successively subjected to debinding and sintering to obtain the ceramic chopping blade.

[0041] Compared with the prior art, the present invention has the following beneficial effects: The present invention uses micellar polymerization to surface modify alumina-based ceramic powder, which can greatly increase the compatibility between alumina-based ceramic powder and photocurable resin, improve the dispersibility of alumina-based ceramic powder in slurry, reduce sedimentation, and further achieve the purpose of improving the strength of the ceramic cleaver blank after photocuring and improving the dimensional accuracy of the ceramic cleaver body. Attached Figure Description

[0042] Figure 1 This is a schematic diagram illustrating the mechanism of surface-modified alumina-based ceramic powder. Detailed Implementation

[0043] To better illustrate the purpose, technical solution, and advantages of this invention, specific embodiments will be used to further explain the invention below. Unless otherwise specified, the test methods used in the embodiments and / or comparative examples are conventional methods; the materials and reagents used, unless otherwise specified, are commercially available.

[0044] Example 1

[0045] (1) Prepare alumina-based ceramic powder with a mass ratio of Al2O3:ZrO2:Cr2O3 = 75:20:5, and then disperse the ceramic powder evenly in water by stirring to obtain a ceramic powder dispersion system.

[0046] (2) Adjust the pH value of the ceramic powder dispersion system to 6.2;

[0047] (3) Based on the mass percentage of alumina-based ceramic powder of 100wt%, add sodium dodecyl sulfate (SDS) surfactant accounting for 0.6wt% of the ceramic powder mass, stir for 30min, and let the surfactant adsorb on the surface of the powder.

[0048] (4) Add 2 wt% of oil-soluble polymer monomer methyl acrylate to the ceramic powder. Because the oil-soluble polymer monomer is unstable in the solution, it will quickly enter the bilayer of the surfactant. This process is very fast. 10 min after adding the oil-soluble polymer monomer, add 1 wt% of photoinitiator benzophenone to the ceramic powder. Then use ultraviolet light to initiate the monomer polymerization reaction, so that the surface of the alumina-based ceramic powder is coated with polymer. Finally, wash away the excess surfactant with deionized water until the surfactant content in the water is less than 10 ppm. Vacuum freeze drying is carried out in a system with a temperature of -30℃ and a vacuum degree of 20 Pa for 2 h to obtain modified alumina-based ceramic powder.

[0049] (5) Based on a ceramic paste content of 100wt%, 45wt% of modified alumina-based ceramic powder, 38wt% of oligomeric polyester acrylate, 16.5wt% of diluent methacrylate and 0.5wt% of photoinitiator benzophenone are mixed at high speed in a homogenizer at 3000rpm for 7h. After mixing, the paste is degassed and defoamed using a vacuum defoamer for 15h until no obvious bubbles are generated on the surface, thus obtaining the ceramic paste for printing.

[0050] (6) Use 3D drawing software to 3D model the chopping knife, slice the model into layers, calculate the two-dimensional shape of the area to be cured in each layer, and generate a printer control program;

[0051] (7) Load ceramic slurry into the DLP printer, load the program, and use photopolymerization to 3D print the blank of the ceramic chopping knife;

[0052] (8) After the product dimensions stabilize, use a descaling furnace to remove organic matter from the ceramic cleaver blank. The maximum descaling temperature is 450℃ and the total time is 50h.

[0053] (9) Use a muffle furnace to sinter the product after debinding. The maximum sintering temperature is 1500℃ and the holding time is 2h to obtain a 3D printed ceramic chopping knife (ceramic body).

[0054] Example 2-13

[0055] The only difference between Examples 2-13 and Example 1 is that the content of surfactant, oil-soluble monomer or photoinitiator is different in steps (3)-(4), as detailed in Table 1.

[0056] Comparative Examples 1-7

[0057] Compared with Example 1, Comparative Examples 1-7 differ only in that the content of surfactant, oil-soluble monomer or photoinitiator is different in steps (3)-(4), as detailed in Table 1.

[0058] Examples 14-19

[0059] The only difference between Examples 14-19 and Example 1 is that the contents of modified alumina-based ceramic powder, oligomer, diluent and photoinitiator are different in step (5), as detailed in Table 1.

[0060] Comparative Examples 8-9

[0061] Compared with Example 1, Comparative Examples 8-9 differ only in that the contents of modified alumina-based ceramic powder, oligomer, and diluent are different in step (5), as detailed in Table 1.

[0062] Table 1

[0063]

[0064]

[0065] Test procedures and industry standards for various performance characteristics:

[0066] a) Weight of polymer coating on powder surface (indicating the degree of modification): Weigh 20 mg of modified alumina-based ceramic powder into a crucible and use a thermogravimetric analyzer (TGA) to measure the weight change curve with temperature. Measurement temperature range: 25-800℃, heating rate: 10 K / min, atmosphere: air.

[0067] The standard weight range for polymer coating on powder surfaces is 0.5-3.3 wt%.

[0068] b) Strength of the blank: In step (7), standard specimens for strength testing were printed using the same raw materials. Twenty standard specimens were taken and tested for bending strength on a universal testing instrument. The three-point bending test mode was used, with a span of 30 mm and a pressing rate of 1 mm / min.

[0069] The strength standard for the blank of a ceramic chopping knife is greater than 50 MPa.

[0070] c) Slurry stability: Take 200 mL of ceramic slurry using a pear-shaped separatory funnel, shake for 5 min and let stand for 24 h. Take 10 mL of the upper slurry and 10 mL of the lower slurry respectively, measure the solid content of each, and calculate the segregation rate of ceramic slurry = (lower solid content - upper solid content) / (upper solid content + lower solid content) * 2.

[0071] Ceramic slurry segregation rate standard: ≤0.3%.

[0072] d) Dimensional difference of ceramic body formed by ceramic cleaver: The diameter of the cylindrical section of ceramic body formed by ceramic cleaver obtained in step (9) is measured at 0.5 mm from each end using a laser thickness gauge. The difference between the two diameters is calculated to represent the dimensional accuracy of ceramic body formed by ceramic cleaver.

[0073] The standard for the dimensional accuracy of ceramic bodies formed by ceramic cleaving tools is ≤10μm.

[0074] The performance test results are shown in Table 2.

[0075] Table 2

[0076]

[0077]

[0078] As shown in Example 1 and Comparative Example 7, without the addition of surfactants, the polymer cannot coat the powder surface, resulting in extremely low slurry stability and dimensional accuracy of the ceramic body formed by the ceramic cutter. This invention utilizes a combination of surfactants and oil-soluble monomers to achieve micellar polymerization, coating a layer of polymer onto the surface of individual alumina-based ceramic powder particles. This polymer completely coats the powder surface, achieving surface modification of the alumina-based ceramic powder. The modified alumina-based ceramic powder obtained by this method has a thin polymer layer, which greatly increases compatibility with oligomers, improves powder dispersibility in the slurry, reduces sedimentation, and ultimately achieves the goal of improving the dimensional accuracy of the ceramic body.

[0079] As can be seen from Examples 1-6, with the increase of surfactant content, the polymer content coated on the surface of ceramic powder increases. When the surfactant content increases to a certain extent, the weight of the coated polymer no longer increases due to the limited total amount of monomers. The stability of the slurry and the dimensional accuracy of the ceramic body also increase with the increase of surfactant content, and then tend to stabilize.

[0080] As can be seen from Example 1 and Comparative Examples 1-2, when the surfactant content is too low, only a bilayer can be formed on the surface of a few ceramic powders, so the amount of coated polymer is significantly reduced, resulting in low slurry stability and low dimensional accuracy of the ceramic body. When the surfactant content is excessive, micelles are formed in water, and some monomers enter the micelles, eventually forming polymer particles. These particles are difficult to separate, and due to their small quantity and light weight, they are unevenly dispersed in the slurry, resulting in poor slurry stability and uneven density between the upper and lower layers, ultimately leading to poor dimensional accuracy of the ceramic body formed by the cleaver.

[0081] As shown in Examples 1 and 7-10, the weight of the coated polymer initially increases and then stabilizes with increasing monomer content. This is mainly because an increase in monomer content leads to an increase in the number of monomers entering the bilayer, resulting in an increase in the final coated polymer content. However, when the monomer content reaches a certain level, the coated polymer content no longer increases because the monomers entering the bilayer are already saturated. Furthermore, with increasing monomer content, the stability of the slurry and the dimensional accuracy of the ceramic body also initially increase and then stabilize with increasing surfactant content.

[0082] As can be seen from Example 1 and Comparative Examples 3-4, when the monomer content is too low, the polymer content coated on the powder surface is greatly reduced, resulting in poor slurry stability and poor dimensional accuracy of the ceramic body. When the monomer content is too high, it has seriously exceeded the saturation amount. At this time, isolated polymer particles will be formed in the solution. These particles are difficult to separate. Due to their small quantity and light weight, they are not evenly dispersed in the slurry, resulting in poor slurry stability and uneven density between the upper and lower layers. Ultimately, this leads to poor dimensional accuracy of the ceramic body formed by the cleaver.

[0083] As can be seen from Examples 1 and 11-13, as the content of photoinitiator increases, the weight of the coated polymer first increases and then tends to stabilize. This is mainly because after the photoinitiator increases to a certain amount, it becomes excessive, and the total amount of oil-soluble monomers is fixed, so the weight of the coated polymer no longer increases. As the content of photoinitiator increases, the stability of the slurry and the dimensional accuracy of the ceramic body also increase first and then tend to stabilize with the increase of the surfactant content.

[0084] As can be seen from Example 1 and Comparative Examples 5-6, when the photoinitiator content is too low, it is insufficient to initiate all monomer polymers, resulting in a decrease in the content of coated polymers, and a deterioration in the stability of the slurry and the dimensional accuracy of the ceramic body. When the photoinitiator is excessive, although the weight of the coated polymer and the stability of the slurry are within the normal range, the excessive photoinitiator will hinder the contact between the oligomers and the modified powder, ultimately leading to a decrease in the stability of the slurry and a deterioration in the dimensional accuracy of the ceramic body.

[0085] As shown in Examples 1 and 14-17, with the increase of modified alumina-based ceramic powder content, the stability of the slurry and the dimensional accuracy of the sintered ceramic body first increase and then tend to stabilize, mainly because the viscosity of the slurry increases with the increase of powder content. As shown in Examples 1 and Comparative Examples 8-9, when the content of modified alumina-based ceramic powder is too low, the viscosity of the slurry decreases significantly, the stability of the slurry deteriorates, and the dimensional differences at different locations of the sintered ceramic body are large, resulting in poor accuracy; when the content of modified alumina-based ceramic powder is too high, the viscosity of the slurry is too high, making it difficult to disperse evenly, resulting in density differences, ultimately leading to poor dimensional accuracy of the sintered ceramic body; as shown in Examples 1 and 18-19, when the photoinitiator content is high, the photocurable resin polymerizes fully, and the difference in slurry stability and dimensional accuracy of the sintered ceramic body is not significant.

[0086] As shown in Example 1 and Comparative Example 10, when no monomer and initiator are added to the modified solution, the powder surface fails to be coated with the modified polymer, resulting in poor compatibility with oligomers, low slurry stability, and ultimately poor dimensional accuracy of the ceramic body.

[0087] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention and are not intended to limit the scope of protection of the present invention. Although the present invention has been described in detail with reference to preferred embodiments, those skilled in the art should understand that modifications or equivalent substitutions can be made to the technical solutions of the present invention without departing from the essence and scope of the technical solutions of the present invention.

Claims

1. A ceramic chopper knife characterized by, The ceramic slurry is produced by photopolymerization 3D printing. The ceramic slurry comprises the following components by weight percentage: 30-60% modified alumina-based ceramic powder, 30-50% oligomer, 5-20% diluent, and 0.2-1% photoinitiator; the modified alumina-based ceramic powder is coated with a polymer, and the polymer has a weight percentage of 0.5-3.3 wt%. The preparation method of the modified alumina-based ceramic powder includes the following steps: (1) Disperse alumina-based ceramic powder in water to obtain an alumina-based ceramic powder dispersion system; (2) Adjust the pH value of the alumina-based ceramic powder dispersion system so that the pH value of the alumina-based ceramic powder dispersion system is less than or greater than the zero charge point of the alumina-based ceramic powder. Add an ionic surfactant and stir, then add an oil-soluble monomer and a photoinitiator in sequence; (3) Modified alumina-based ceramic powder is obtained by photo-initiated polymerization reaction, followed by water washing and drying.

2. The ceramic chopping knife as described in claim 1, characterized in that, Includes at least one of the following: The ionic surfactant accounts for 0.4-1.2% of the mass of the alumina-based ceramic powder. The oil-soluble monomer accounts for 0.6-5% of the mass of the alumina-based ceramic powder; The photoinitiator accounts for 0.2-2% of the mass of the alumina-based ceramic powder.

3. The ceramic chopping knife as described in claim 1, characterized in that, The ionic surfactant accounts for 0.5-0.7% of the mass of the alumina-based ceramic powder; the oil-soluble monomer accounts for 1-3% of the mass of the alumina-based ceramic powder.

4. The ceramic chopping knife as described in claim 1, characterized in that, The ionic surfactant includes at least one of sodium dodecyl sulfate and hexadecyltrimethylammonium chloride; the alumina-based ceramic powder includes alumina, zirconium oxide, and chromium trioxide, with the mass ratio of alumina, zirconium oxide, and chromium trioxide being alumina:zirconia:chromium trioxide = (65-95):(2-30):(0.5-5).

5. The ceramic chopping knife as described in claim 1, characterized in that, The oil-soluble monomers include at least one of methyl acrylate, amino acrylate, and epoxy acrylate.

6. The ceramic chopping knife as described in claim 1, characterized in that, The photoinitiator includes at least one of benzophenone, benzoyl dimethyl ether, 2-hydroxy-2-methyl-1-phenyl-1-propanone, 1-hydroxycyclohexyl benzophenone, benzophenone, 2,4,6-(trimethylbenzoyl)diphenylphosphine oxide, and phenylbis(2,4,6-trimethylbenzoyl)phosphine oxide. The photoinitiator accounts for 1-1.5% of the mass of the alumina-based ceramic powder.

7. The ceramic chopping knife as described in claim 1, characterized in that, Includes at least one of the following: The oligomer includes at least one of polyester acrylate, polyether acrylate, polyurethane acrylate, and epoxy acrylate; The diluent includes at least one of methacrylate, phenoxyethanol, glycerin, polyethylene glycol, and dibutyl phthalate; The photoinitiator includes at least one of benzophenone, benzoyl dimethyl ether, 2-hydroxy-2-methyl-1-phenyl-1-propanone, 1-hydroxycyclohexyl benzophenone, benzophenone, 2,4,6-(trimethylbenzoyl)diphenylphosphine oxide, and phenylbis(2,4,6-trimethylbenzoyl)phosphine oxide. The mass ratio of the modified alumina-based ceramic powder to the oligomer is (30-60):(30-50).

8. A method for preparing a ceramic chopping knife according to any one of claims 1-7, characterized in that, Includes the following steps: (1) The modified alumina-based ceramic powder, oligomer, diluent and photoinitiator are mixed and degassed to obtain a ceramic slurry; (2) Using the ceramic slurry as a 3D printing material, a ceramic chopping blade blank is printed by photopolymerization 3D printing technology; (3) The ceramic chopping blank is successively subjected to debinding and sintering to obtain the ceramic chopping blade.

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