CN113548897A - Ceramic 3D printing paste with high curing capacity and preparation method thereof - Google Patents
Ceramic 3D printing paste with high curing capacity and preparation method thereof Download PDFInfo
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- C04B35/626—Preparing or treating the powders individually or as batches ; preparing or treating macroscopic reinforcing agents for ceramic products, e.g. fibres; mechanical aspects section B
- C04B35/63—Preparing or treating the powders individually or as batches ; preparing or treating macroscopic reinforcing agents for ceramic products, e.g. fibres; mechanical aspects section B using additives specially adapted for forming the products, e.g.. binder binders
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Abstract
The invention discloses a ceramic 3D printing paste with high curing capability, which comprises the following components in parts by weight: 25-45 parts of photosensitive resin, 30-60 parts of SiC powder, 0.5-2.8 parts of dispersing agent, 0.1-0.5 part of photoinitiator, 0.2-1 part of anti-settling agent and 25-35 parts of absolute ethyl alcohol; the photosensitive resin is a mixed liquid of a monofunctional group resin monomer and a bifunctional group resin monomer, and the mass ratio of the monofunctional group resin monomer to the bifunctional group resin monomer is 0.5-1: 2-4. The invention also provides a preparation method of the ceramic 3D printing paste. This kind of ceramic 3D of high solidification ability prints cream material adopts the mode that powder parcel resin preactivated in advance, can promote the solidification properties of SiC thick liquids, and the resin also can be burnt in the thermal treatment stage in addition, can not have extra influence to final finished product performance.
Description
Technical Field
The invention relates to the technical field of 3D printing materials and methods, in particular to a ceramic 3D printing paste with high curing capability and a preparation method thereof.
Background
The ceramic 3D printing technology is divided into different types of 3D printing and forming processes according to different forming modes. And the photocuring ceramic 3D printing is one of the most promising application prospects recognized in the industry at present.
The photocuring ceramic 3D printing technology adopts the steps that ceramic powder is dispersed in photosensitive resin to form ceramic paste/slurry, the photopolymerizing characteristic of the photosensitive resin is used as a binder, selective curing and forming are carried out, after ceramic green bodies are printed out, the cured resin is removed through heat treatment, and the ceramic powder is densified to obtain the final ceramic finished product.
In the preparation process of the ceramic slurry, the curing of the normal photosensitive resin is relatively well controlled, but the addition of the ceramic powder can obviously influence the curing process, even seriously influence the curing process of the photosensitive resin, and cause the condition of incapability of curing. The influence of the ceramic powder on the curing process is greatly related to the properties of the ceramic powder. For example, SiC ceramics are normally difficult to cure after being formulated into a marking material because of their intrinsic light absorption. Reduction of the solid content of SiC or incorporation of Al into SiC printing materials is generally used in the industry2O3Powder, and use of SiO2The SiC powder is wrapped so as to achieve the purpose of realizing a certain curing depth. However, the treatment methods for reducing the solid content and introducing other ceramics have obvious defects, influence the 3D printing forming performance and have obvious influence on the final product performance.
Chinese patent publication No. CN106810215A provides a method for preparing ceramic slurry and 3D printing photocuring molding. The method mainly comprises the following steps: ceramic powder: 25-85 vol%, photosensitive resin premix: 15-75 vol%. The method comprises the following steps of A) preparing a photosensitive resin premix: stirring the oligomer, the reactive diluent, the photoinitiator, the dispersant, the photosensitizer and the sensitizer at a certain ratio at medium speed for 0.5-3h to fully and uniformly mix the components; B) and (3) placing the premixed liquid and the ceramic powder into a ball mill according to a certain volume ratio, and carrying out ball milling for 5-15h to prepare the ceramic slurry with high solid content and low viscosity. The product formed by the patent is ceramic slurry, and has certain defects on a curing system.
Disclosure of Invention
In order to solve the problems in the prior art, the invention provides the ceramic 3D printing paste with high curing capability, and a mode of pre-activating powder-coated resin is adopted, so that the curing performance of SiC slurry can be improved, the resin can be burnt off in a heat treatment stage, and the performance of a final finished product cannot be additionally influenced.
In order to achieve the purpose, the invention provides the following technical scheme:
the ceramic 3D printing paste with high curing capability comprises the following components in parts by weight: 25-45 parts of photosensitive resin, 30-60 parts of SiC powder, 0.5-2.8 parts of dispersing agent, 0.1-0.5 part of photoinitiator, 0.2-1 part of anti-settling agent and 25-35 parts of absolute ethyl alcohol;
the photosensitive resin is a mixed liquid of a monofunctional group resin monomer and a bifunctional group resin monomer, and the mass ratio of the monofunctional group resin monomer to the bifunctional group resin monomer is 0.5-1: 2-4.
Preferably, the monofunctional resin monomer is at least one of 2-phenoxyethyl methacrylate, isobornyl methacrylate or isobornyl acrylate; the monofunctional resin monomer has a viscosity of <20 cps.
Preferably, the bifunctional resin monomer is at least one of polyethylene glycol (200) dimethacrylate, 1, 6-hexanediol diacrylate or tripropylene glycol diacrylate; the difunctional resin monomer has a viscosity of <20 cps.
Preferably, the SiC powder is SiC ceramic powder, the particle size range of the SiC ceramic powder is 0.5-10 mu m, and the SiC ceramic powder is nearly spherical.
Preferably, the dispersant is at least one of BYK-111, D-801 or Solsperse 20000.
Preferably, the photoinitiator is at least one of 2-dimethylamino-2-benzyl-1- (4-piperidinophenyl) -1-butanone, 1-hydroxycyclohexyl phenyl ketone, 4-bis (diethoxy) benzophenone, or 2,4, 6-trimethylbenzoyl-diphenylphosphine oxide.
Preferably, the anti-settling agent is at least one of BYK-415, BYK-430 or BYK-431.
Preferably, the ceramic 3D printing paste comprises the following components in parts by weight: 50 parts of bifunctional resin monomer 1, 6-hexanediol diacrylate, 200 parts of SiC powder, 0.5-2.8 parts of dispersant, 0.25 part of photoinitiator 2,4, 6-trimethylbenzoyl-diphenyl phosphine oxide, 12 parts of monofunctional resin monomer isobornyl methacrylate, 28 parts of bifunctional resin monomer 1, 6-hexanediol diacrylate, 1112 parts of dispersant BYK, and BYK-4310.4 parts of anti-settling agent.
The invention also provides a preparation method of the ceramic 3D printing paste, which comprises the following steps:
s1, taking SiC powder, absolute ethyl alcohol, a part of photoinitiator and photosensitive resin according to parts by weight, and performing ball milling treatment to obtain slurry;
s2, after the slurry is placed under an ultraviolet lamp for irradiation for a period of time, centrifuging and filtering the slurry, collecting a solid part, and drying, grinding and sieving the solid part to obtain treated powder;
s3, mixing and dispersing the dispersing agent, the anti-settling agent, the rest photoinitiator and the photosensitive resin, homogenizing at 1400-2000r/min for 3-6min to obtain a premixed solution, and then adding the powder prepared in the S2 into the premixed solution;
s4, homogenizing and mixing in three sections: the first section is 600-800r/min, and the mixing time is 2 min; the second section is 1500-1700r/min and the mixing is 2min, the third section is 1800-2100r/min and the mixing is 5 min; and finally obtaining the required ceramic 3D printing paste.
In the preparation method of the ceramic 3D printing paste, SiC powder, absolute ethyl alcohol, a photoinitiator and photosensitive resin are mixed, and after ball milling, the slurry is irradiated by an ultraviolet lamp to carry out pre-activation treatment. After irradiating for a period of time, centrifugally filtering the slurry, collecting the solid part, drying and grinding to obtain pretreated powder; then the powder, photosensitive resin and additive are mixed together to prepare a SiC ceramic paste system.
Specifically, the SiC powder is subjected to 'pre-activation' treatment by using photosensitive resin, under the irradiation of ultraviolet light, the photosensitive resin is catalyzed by a photoinitiator, and a curing reaction begins to occur, wherein the reaction conditions are divided into two types, and one type is a polymerization reaction among resin molecules in a liquid phase; and the other one is that resin molecules in the liquid phase react with groups on the surface of the SiC powder and are chemically adsorbed on the surface of the SiC powder, the part of adsorbed resin molecules have certain reaction activity, and after the resin molecules are prepared into a paste material in the later period, the part of adsorbed resin molecules are subjected to a curing reaction more easily by virtue of the light absorption capacity of the SiC powder compared with free resin molecules in the system, so that the overall curing capacity of the system is improved.
Further, in the step S2, the time of the slurry irradiated by the ultraviolet lamp is 3-20S.
Based on the technical scheme, the invention has the following technical effects:
(1) according to the ceramic 3D printing paste with high curing capability, provided by the invention, the photosensitive resin is adopted to carry out 'preactivation' treatment on SiC powder, under the irradiation of ultraviolet light, the photoinitiator catalyzes the photosensitive resin to start a curing reaction, and the resin is chemically adsorbed on the surface of the SiC powder while the polymerization reaction among resin molecules in a liquid phase is carried out, so that the resin can be subjected to the curing reaction more easily by virtue of the light absorption capability of the SiC powder in the later period, and the integral curing capability of a system is improved.
(2) According to the preparation method of the ceramic 3D printing paste, the SiC powder is used for wrapping the photosensitive resin for preactivation in advance, so that the curing performance of the SiC slurry can be improved, the resin can be burnt in the heat treatment stage, and the performance of the final finished product cannot be additionally influenced.
Drawings
Fig. 1 is a process flow chart of a preparation method of the ceramic 3D printing paste of the present invention.
Detailed Description
To facilitate an understanding of the invention, the invention will now be described more fully with reference to the following specific embodiments and accompanying drawings. Preferred embodiments of the present invention are shown in the drawings. This invention may, however, be embodied in many different forms and should not be construed as limited to the embodiments set forth herein. Rather, these embodiments are provided so that this disclosure will be thorough and complete.
Unless defined otherwise, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this invention belongs. The terminology used herein in the description of the invention is for the purpose of describing particular embodiments only and is not intended to be limiting of the invention.
The ceramic 3D printing paste with high curing capability comprises the following components in parts by weight: 25-45 parts of photosensitive resin, 30-60 parts of SiC powder, 0.5-2.8 parts of dispersing agent, 0.1-0.5 part of photoinitiator, 0.2-1 part of anti-settling agent and 25-35 parts of absolute ethyl alcohol; the photosensitive resin is a mixed solution of a monofunctional resin monomer and a bifunctional resin monomer, and the mass ratio of the monofunctional resin monomer to the bifunctional resin monomer is 0.5-1: 2-4.
Wherein the monofunctional resin monomer is at least one of 2-phenoxyethyl methacrylate, isobornyl methacrylate or isobornyl acrylate; the viscosity of the monofunctional resin monomer is less than 20 cps; the bifunctional resin monomer is at least one of polyethylene glycol (200) dimethacrylate, 1, 6-hexanediol diacrylate or tripropylene glycol diacrylate; the viscosity of the bifunctional resin monomer is less than 20 cps.
The SiC powder is SiC ceramic powder, the particle size range of the SiC ceramic powder is 0.5-10 mu m, and the SiC ceramic powder is nearly spherical.
The dispersant is at least one of BYK-111, D-801 and Solsperse 20000.
The photoinitiator is at least one of 2-dimethylamino-2-benzyl-1- (4-piperidinophenyl) -1-butanone, 1-hydroxycyclohexyl phenyl ketone, 4-bis (diethoxy) phenyl ketone or 2,4, 6-trimethylbenzoyl-diphenylphosphine oxide.
The anti-settling agent is at least one of BYK-415, BYK-430 or BYK-431.
Fig. 1 is a process flow chart of a preparation method of a ceramic 3D printing paste according to this embodiment, and as shown in fig. 1, the preparation method of the ceramic 3D printing paste specifically includes the following steps:
s1, taking a certain amount of SiC powder, absolute ethyl alcohol, photosensitive resin (25-40% of the weight of the SiC powder) and an initiator (0.2-0.6% of the weight of the resin), and performing ball milling treatment to obtain slurry;
s2, after the slurry is placed under an ultraviolet lamp for irradiation for 3-20s, centrifuging and filtering the slurry, collecting a solid part, and drying, grinding and sieving to obtain treated powder;
s3, preparing a paste material: taking a certain amount of resin (25-45% of the total mass of the system), a dispersant (1.2-4% of the mass of SiC powder), an initiator (0.4-1.2% of the mass of the resin) and an anti-settling agent (0.2-1% of the total mass of the system), mixing and dispersing, homogenizing at 1400-2000r/min for 3-6min to obtain a premixed solution, and then adding the powder (50-70% of the total mass of the system) prepared by S2 into the premixed solution;
s4, homogenizing and mixing in three sections: the first section is 600-800r/min, and the mixing time is 2 min; the second section is 1500-1700r/min and the mixing is 2min, the third section is 1800-2100r/min and the mixing is 5 min; and finally obtaining the required ceramic 3D printing paste. On an SLA ceramic printer, the ceramic 3D printing paste is printed and cured, and the curing depth is obviously improved.
Example 1
S1, powder treatment 1: 200g of SiC powder and 300g of ZrO were weighed2Ball milling beads, 100g of absolute ethyl alcohol, 50g of 1, 6-hexanediol diacrylate and 0.25g of 2,4, 6-trimethylbenzoyl-diphenylphosphine oxide are placed in a ball milling tank, ball milling is started at 180r/min, and the ball milling time is 3 hours; then collecting the obtained ceramic slurry;
s2, powder treatment 2: and (3) placing the ceramic slurry under a 100W ultraviolet lamp, irradiating for 10s, then performing centrifugal filtration on the slurry, collecting a solid part, placing the solid part into an oven, and drying and grinding at 80 ℃ to obtain treated powder.
S3, preparing a paste material: adding 12g of isobornyl methacrylate, 28g of 1, 6-hexanediol diacrylate, 2g of BYK111, 0.2g of 2,4, 6-trimethylbenzoyl-diphenylphosphine oxide and 0.4g of BYK-431 into a homogenizing container, starting homogenizing, and mixing at 1800r/min for 5min to obtain a premixed liquid; then 98.4g of the treated powder of S2 is added into the premixed liquid;
s4, opening segmented homogenization: the first stage is 600r/min, and the mixture is mixed for 2 min; in the second stage 1500r/min, mixing for 2 min; finally, mix at 2100r/min for 5 min. And then collecting the obtained ceramic 3D printing paste, wherein the solid content of SiC is about 69.8%, and the curing depth is 60 mu m under ceramic printing.
Comparative example 1
S1, powder treatment (without adding photosensitive resin): 200g of SiC powder and 300g of ZrO2Putting ball milling beads and 100g of absolute ethyl alcohol into a ball milling tank, and beginning ball milling at 180r/min for 3 h; and then, centrifugally filtering the slurry, collecting the obtained solid part, putting the solid part into an oven, and drying and grinding the solid part at 80 ℃ to obtain the treated powder.
S2, preparing a paste material: adding 12g of isobornyl methacrylate, 28g of 1, 6-hexanediol diacrylate, 2g of BYK111, 0.2g of 2,4, 6-trimethylbenzoyl-diphenylphosphine oxide and 0.4g of BYK-431 into a homogenizing container, starting homogenizing, and mixing at 1800r/min for 5min to obtain a premixed liquid; and then 98.4g of the treated powder is added into the premixed liquid, the segmented homogenization is started, the first segment is 600r/min and is mixed for 2min, the second segment is 1500r/min and is mixed for 2min, and finally, the mixture is mixed for 5min at 2100 r/min. And finally, collecting the obtained ceramic 3D printing paste, wherein the paste cannot be solidified under a ceramic printer, and no solidified sheet is formed at the position scanned by laser.
Example 2
S1, powder treatment 1: 200g of SiC powder and 300g of ZrO were weighed2Ball milling beads, 100g of absolute ethyl alcohol, 40g of 1, 6-hexanediol diacrylate and 0.2g of 2,4, 6-trimethylbenzoyl-diphenylphosphine oxide are put into a ball milling tank, ball milling is started at 180r/min, and the ball milling time is 3 hours; then collecting the obtained ceramic slurry;
s2, powder treatment 2: and (3) placing the ceramic slurry under a 100W ultraviolet lamp, irradiating for 6s, then carrying out centrifugal filtration on the slurry, collecting a solid part, placing the solid part into an oven, and drying and grinding at 80 ℃ to obtain the treated powder.
S3, preparing a paste material: adding 12g of isobornyl methacrylate, 28g of tripropylene glycol diacrylate, 1.3g of BYK111, 0.2g of 2,4, 6-trimethylbenzoyl-diphenylphosphine oxide and 0.4g of BYK-431 into a homogenizing container, starting homogenizing, and mixing at 1500r/min for 6min to obtain a premixed solution; then, 62.2g of the processed powder of S2 is added into the premixed liquid;
s4, opening segmented homogenization: the first stage is 800r/min, and the mixture is mixed for 2 min; in the second stage 1500r/min, mixing for 2 min; finally, mixing for 5min at 2000 r/min. And then collecting the obtained ceramic 3D printing paste, wherein the solid content of SiC is about 60%, and the curing depth is 67 mu m under ceramic printing.
Comparative example 2
S1, powder treatment (without adding photosensitive resin): 200g of SiC powder and 300g of ZrO2Putting ball milling beads and 100g of absolute ethyl alcohol into a ball milling tank, and beginning ball milling at 180r/min for 3 h; and then, centrifugally filtering the slurry, collecting the obtained solid part, putting the solid part into an oven, and drying and grinding the solid part at 80 ℃ to obtain the treated powder.
S2, preparing a paste material: adding 12g of isobornyl methacrylate, 28g of tripropylene glycol diacrylate, 1.3g of BYK111, 0.2g of 2,4, 6-trimethylbenzoyl-diphenylphosphine oxide and 0.4g of BYK-431 into a homogenizing container, starting homogenizing, and mixing at 1500r/min for 6min to obtain a premixed solution; and then 62.2g of the treated powder is added into the premixed liquid, the segmented homogenization is started, the first segment is 800r/min, the mixing is carried out for 2min, the second segment is 1500r/min, the mixing is carried out for 2min, and finally the mixing is carried out for 5min at 2000 r/min. The resulting ceramic 3D printing paste was finally collected with only a very thin cured layer under the ceramic printer, which was difficult to take out for measurement, with an expected cured thickness of <20 μm.
Example 3
S1, powder treatment 1: 200g of SiC powder and 300g of ZrO were weighed2Ball milling beads, 100g of absolute ethyl alcohol, 60g of 1, 6-hexanediol diacrylate and 0.6g of 2,4, 6-trimethylbenzoyl-diphenylphosphine oxide are put into a ball milling tank, ball milling is started at 180r/min, and the ball milling time is 3 hours;then collecting the obtained ceramic slurry;
s2, powder treatment 2: and (3) placing the ceramic slurry under a 100W ultraviolet lamp, irradiating for 15s, then performing centrifugal filtration on the slurry, collecting a solid part, placing the solid part into an oven, and drying and grinding at 80 ℃ to obtain treated powder.
S3, preparing a paste material: adding 12g of isobornyl methacrylate, 28g of 1, 6-hexanediol diacrylate, 0.82g of BYK111, 0.2g of 2,4, 6-trimethylbenzoyl-diphenylphosphine oxide and 0.6g of BYK-431 into a homogenizing container, starting homogenizing, and mixing at 1800r/min for 5min to obtain a premixed solution; then, 41g of the processed S2 powder is added into the premixed liquid;
s4, opening segmented homogenization: the first stage is 600r/min, and the mixture is mixed for 2 min; the second stage is 1700r/min, and the mixing is carried out for 2 min; finally, mixing for 5min at 2000 r/min. And then collecting the obtained ceramic 3D printing paste, wherein the solid content of SiC is about 50%, and the curing depth is 75 μm under ceramic printing.
Comparative example 3
S1, powder treatment (without adding photosensitive resin): 200g of SiC powder and 300g of ZrO2Putting ball milling beads and 100g of absolute ethyl alcohol into a ball milling tank, and beginning ball milling at 180r/min for 3 h; and then, centrifugally filtering the slurry, collecting the obtained solid part, putting the solid part into an oven, and drying and grinding the solid part at 80 ℃ to obtain the treated powder.
S2, preparing a paste material: adding 12g of isobornyl methacrylate, 28g of 1, 6-hexanediol diacrylate, 0.82g of BYK111, 0.2g of 2,4, 6-trimethylbenzoyl-diphenylphosphine oxide and 0.6g of BYK-431 into a homogenizing container, starting homogenizing, and mixing at 1800r/min for 5min to obtain a premixed solution; and then adding 41g of the treated powder into the premixed liquid, starting the sectional homogenization, mixing for 2min at a first section of 600r/min, mixing for 2min at a second section of 1700r/min, and finally mixing for 5min at 2000 r/min. The resulting ceramic 3D printed paste was finally collected and cured under ceramic printing with only a very thin layer, which was difficult to measure, with a predicted cured thickness of <20 μm.
The curing depth (thickness) data of the ceramic 3D printing pastes of examples 1 to 3 and the ceramic 3D printing pastes of comparative examples 1 to 3 after curing by ceramic printing are shown in table 1.
Table 1 curing depth data for ceramic 3D printing pastes of examples 1-3, comparative examples 1-3
| Sample (I) | SiC solid content (%) | Depth of cure (μm) |
| Example 1 | 69.8 | 60 |
| Comparative example 1 | - | Can not be solidified |
| Example 2 | 60 | 67 |
| Comparative example 2 | - | ＜20 |
| Example 3 | 50 | 75 |
| Comparative example 3 | - | ＜20 |
As can be seen from table 1, in the ceramic 3D printing paste provided in examples 1 to 3, since the SiC powder is subjected to "pre-activation" treatment by using the photosensitive resin during the SiC powder treatment, the photoinitiator catalyzes the photosensitive resin under the irradiation of the ultraviolet light to start a curing reaction, and the resin is chemically adsorbed on the surface of the SiC powder while the polymerization reaction between the resin molecules in the liquid phase is performed, and the resin can be cured more easily by virtue of the light absorption capability of the SiC powder in the later period, so that the overall curing capability of the system is improved, and the curing depth is not less than 60 μm; in the ceramic 3D printing paste of the comparative example, the SiC powder was not treated with the photosensitive resin, and the cured thickness was less than 20 μm or could not be cured during printing.
The foregoing is merely exemplary and illustrative of the structures of the present invention, which are described in some detail and detail, and are not to be construed as limiting the scope of the invention. It should be noted that, for a person skilled in the art, several variations and modifications are possible without departing from the inventive concept, and such obvious alternatives fall within the scope of the invention.
Claims (10)
1. The ceramic 3D printing paste with high curing capability is characterized by comprising the following components in parts by weight: 25-45 parts of photosensitive resin, 30-60 parts of SiC powder, 0.5-2.8 parts of dispersing agent, 0.1-0.5 part of photoinitiator, 0.2-1 part of anti-settling agent and 25-35 parts of absolute ethyl alcohol;
the photosensitive resin is a mixed liquid of a monofunctional group resin monomer and a bifunctional group resin monomer, and the mass ratio of the monofunctional group resin monomer to the bifunctional group resin monomer is 0.5-1: 2-4.
2. The ceramic 3D printing paste according to claim 1, wherein the monofunctional resin monomer is at least one of 2-phenoxyethyl methacrylate, isobornyl methacrylate, or isobornyl acrylate; the monofunctional resin monomer has a viscosity of <20 cps.
3. The ceramic 3D printing paste of claim 1, wherein the difunctional resin monomer is at least one of polyethylene glycol (200) dimethacrylate, 1, 6-hexanediol diacrylate, or tripropylene glycol diacrylate; the difunctional resin monomer has a viscosity of <20 cps.
4. The ceramic 3D printing paste according to claim 1, wherein the SiC powder is SiC ceramic powder having a particle size in the range of 0.5-10 μ ι η and a shape of a nearly spherical shape.
5. The ceramic 3D printing paste of claim 1, wherein the dispersant is at least one of BYK-111, D-801 or Solsperse 20000.
6. The ceramic 3D printing paste according to claim 1, wherein the photoinitiator is at least one of 2-dimethylamino-2-benzyl-1- (4-piperidinophenyl) -1-butanone, 1-hydroxycyclohexyl phenyl ketone, 4-bis (diethoxy) benzophenone, or 2,4, 6-trimethylbenzoyl-diphenylphosphine oxide.
7. Ceramic 3D printing paste according to claim 1, wherein the anti-settling agent is at least one of BYK-415, BYK-430 or BYK-431.
8. The ceramic 3D printing paste according to claim 1, comprising the following components in parts by weight: 50 parts of bifunctional resin monomer 1, 6-hexanediol diacrylate, 200 parts of SiC powder, 0.5-2.8 parts of dispersant, 0.25 part of photoinitiator 2,4, 6-trimethylbenzoyl-diphenyl phosphine oxide, 12 parts of monofunctional resin monomer isobornyl methacrylate, 28 parts of bifunctional resin monomer 1, 6-hexanediol diacrylate, 1112 parts of dispersant BYK, and BYK-4310.4 parts of anti-settling agent.
9. A method of preparing a ceramic 3D printing paste according to any of claims 1-8, comprising the steps of:
s1, taking SiC powder, absolute ethyl alcohol, a part of photoinitiator and photosensitive resin according to parts by weight, and performing ball milling treatment to obtain slurry;
s2, after the slurry is placed under an ultraviolet lamp for irradiation for a period of time, centrifuging and filtering the slurry, collecting a solid part, and drying, grinding and sieving the solid part to obtain treated powder;
s3, mixing and dispersing the dispersing agent, the anti-settling agent, the rest photoinitiator and the photosensitive resin, homogenizing at 1400-2000r/min for 3-6min to obtain a premixed solution, and then adding the powder prepared in the S2 into the premixed solution;
s4, homogenizing and mixing in three sections: the first section is 600-800r/min, and the mixing time is 2 min; the second section is 1500-1700r/min and the mixing is 2min, the third section is 1800-2100r/min and the mixing is 5 min; and finally obtaining the required ceramic 3D printing paste.
10. The method according to claim 1, wherein in the step S2, the slurry is irradiated with the ultraviolet lamp for 3 to 20 seconds.
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