CN106242507B - Clay mud for directly-formed 3D ceramic printing and preparation method and application thereof - Google Patents
Clay mud for directly-formed 3D ceramic printing and preparation method and application thereof Download PDFInfo
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- CN106242507B CN106242507B CN201610749393.5A CN201610749393A CN106242507B CN 106242507 B CN106242507 B CN 106242507B CN 201610749393 A CN201610749393 A CN 201610749393A CN 106242507 B CN106242507 B CN 106242507B
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- 239000000919 ceramic Substances 0.000 title claims abstract description 68
- 239000004927 clay Substances 0.000 title claims abstract description 44
- 238000007639 printing Methods 0.000 title claims abstract description 25
- 238000002360 preparation method Methods 0.000 title claims abstract description 12
- 239000000843 powder Substances 0.000 claims abstract description 44
- 238000010146 3D printing Methods 0.000 claims abstract description 32
- 239000002270 dispersing agent Substances 0.000 claims abstract description 17
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Chemical compound O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 10
- 229920002907 Guar gum Polymers 0.000 claims abstract description 9
- 239000008367 deionised water Substances 0.000 claims abstract description 9
- 229910021641 deionized water Inorganic materials 0.000 claims abstract description 9
- 239000000665 guar gum Substances 0.000 claims abstract description 9
- 229960002154 guar gum Drugs 0.000 claims abstract description 9
- 235000010417 guar gum Nutrition 0.000 claims abstract description 9
- 239000002562 thickening agent Substances 0.000 claims abstract description 9
- 239000007787 solid Substances 0.000 claims abstract description 8
- 239000000725 suspension Substances 0.000 claims description 16
- 238000001125 extrusion Methods 0.000 claims description 10
- AYJRCSIUFZENHW-UHFFFAOYSA-L barium carbonate Chemical compound [Ba+2].[O-]C([O-])=O AYJRCSIUFZENHW-UHFFFAOYSA-L 0.000 claims description 8
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N Silicium dioxide Chemical compound O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 claims description 6
- 238000001354 calcination Methods 0.000 claims description 6
- 238000002156 mixing Methods 0.000 claims description 6
- 239000005995 Aluminium silicate Substances 0.000 claims description 5
- 235000012211 aluminium silicate Nutrition 0.000 claims description 5
- 238000001035 drying Methods 0.000 claims description 5
- NLYAJNPCOHFWQQ-UHFFFAOYSA-N kaolin Chemical compound O.O.O=[Al]O[Si](=O)O[Si](=O)O[Al]=O NLYAJNPCOHFWQQ-UHFFFAOYSA-N 0.000 claims description 5
- QGZKDVFQNNGYKY-UHFFFAOYSA-O Ammonium Chemical compound [NH4+] QGZKDVFQNNGYKY-UHFFFAOYSA-O 0.000 claims description 4
- 229910021532 Calcite Inorganic materials 0.000 claims description 4
- DPXJVFZANSGRMM-UHFFFAOYSA-N acetic acid;2,3,4,5,6-pentahydroxyhexanal;sodium Chemical compound [Na].CC(O)=O.OCC(O)C(O)C(O)C(O)C=O DPXJVFZANSGRMM-UHFFFAOYSA-N 0.000 claims description 4
- 229910052656 albite Inorganic materials 0.000 claims description 4
- 239000001768 carboxy methyl cellulose Substances 0.000 claims description 4
- 229910052681 coesite Inorganic materials 0.000 claims description 4
- 229910052906 cristobalite Inorganic materials 0.000 claims description 4
- 229920000058 polyacrylate Polymers 0.000 claims description 4
- 239000000377 silicon dioxide Substances 0.000 claims description 4
- 235000019812 sodium carboxymethyl cellulose Nutrition 0.000 claims description 4
- 229920001027 sodium carboxymethylcellulose Polymers 0.000 claims description 4
- 235000019830 sodium polyphosphate Nutrition 0.000 claims description 4
- 229910052682 stishovite Inorganic materials 0.000 claims description 4
- 239000000454 talc Substances 0.000 claims description 4
- 229910052623 talc Inorganic materials 0.000 claims description 4
- 229910052905 tridymite Inorganic materials 0.000 claims description 4
- 239000004372 Polyvinyl alcohol Substances 0.000 claims description 3
- GUJOJGAPFQRJSV-UHFFFAOYSA-N dialuminum;dioxosilane;oxygen(2-);hydrate Chemical compound O.[O-2].[O-2].[O-2].[Al+3].[Al+3].O=[Si]=O.O=[Si]=O.O=[Si]=O.O=[Si]=O GUJOJGAPFQRJSV-UHFFFAOYSA-N 0.000 claims description 3
- 229910052901 montmorillonite Inorganic materials 0.000 claims description 3
- 229920002451 polyvinyl alcohol Polymers 0.000 claims description 3
- 239000002202 Polyethylene glycol Substances 0.000 claims description 2
- 238000011049 filling Methods 0.000 claims description 2
- 239000002245 particle Substances 0.000 claims description 2
- 229920001223 polyethylene glycol Polymers 0.000 claims description 2
- 229940057838 polyethylene glycol 4000 Drugs 0.000 claims description 2
- 229940093429 polyethylene glycol 6000 Drugs 0.000 claims description 2
- 229910052594 sapphire Inorganic materials 0.000 claims description 2
- 239000001488 sodium phosphate Substances 0.000 claims description 2
- 229910000162 sodium phosphate Inorganic materials 0.000 claims description 2
- RYFMWSXOAZQYPI-UHFFFAOYSA-K trisodium phosphate Chemical compound [Na+].[Na+].[Na+].[O-]P([O-])([O-])=O RYFMWSXOAZQYPI-UHFFFAOYSA-K 0.000 claims description 2
- 238000000034 method Methods 0.000 abstract description 18
- 238000010008 shearing Methods 0.000 abstract description 2
- 239000011230 binding agent Substances 0.000 description 11
- 239000010410 layer Substances 0.000 description 9
- 238000005516 engineering process Methods 0.000 description 8
- 229910010293 ceramic material Inorganic materials 0.000 description 5
- 238000009775 high-speed stirring Methods 0.000 description 4
- 239000000463 material Substances 0.000 description 4
- 239000002002 slurry Substances 0.000 description 4
- 238000000149 argon plasma sintering Methods 0.000 description 3
- 235000012222 talc Nutrition 0.000 description 3
- 238000004519 manufacturing process Methods 0.000 description 2
- 238000002844 melting Methods 0.000 description 2
- 230000008018 melting Effects 0.000 description 2
- 229910052751 metal Inorganic materials 0.000 description 2
- 239000002184 metal Substances 0.000 description 2
- 239000000203 mixture Substances 0.000 description 2
- 238000000465 moulding Methods 0.000 description 2
- 229920003023 plastic Polymers 0.000 description 2
- 239000004033 plastic Substances 0.000 description 2
- 238000003756 stirring Methods 0.000 description 2
- 239000000654 additive Substances 0.000 description 1
- 230000000996 additive effect Effects 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000007797 corrosion Effects 0.000 description 1
- 238000005260 corrosion Methods 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 238000010017 direct printing Methods 0.000 description 1
- 238000010438 heat treatment Methods 0.000 description 1
- 239000007791 liquid phase Substances 0.000 description 1
- 238000007712 rapid solidification Methods 0.000 description 1
- 239000002994 raw material Substances 0.000 description 1
- 239000011347 resin Substances 0.000 description 1
- 229920005989 resin Polymers 0.000 description 1
- 239000005060 rubber Substances 0.000 description 1
- 238000001878 scanning electron micrograph Methods 0.000 description 1
- 239000002356 single layer Substances 0.000 description 1
- 238000005245 sintering Methods 0.000 description 1
- 238000007711 solidification Methods 0.000 description 1
- 230000008023 solidification Effects 0.000 description 1
- 238000005507 spraying Methods 0.000 description 1
- 239000000126 substance Substances 0.000 description 1
- 230000008646 thermal stress Effects 0.000 description 1
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- C04B33/00—Clay-wares
- C04B33/02—Preparing or treating the raw materials individually or as batches
- C04B33/13—Compounding ingredients
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B33—ADDITIVE MANUFACTURING TECHNOLOGY
- B33Y—ADDITIVE MANUFACTURING, i.e. MANUFACTURING OF THREE-DIMENSIONAL [3-D] OBJECTS BY ADDITIVE DEPOSITION, ADDITIVE AGGLOMERATION OR ADDITIVE LAYERING, e.g. BY 3-D PRINTING, STEREOLITHOGRAPHY OR SELECTIVE LASER SINTERING
- B33Y70/00—Materials specially adapted for additive manufacturing
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- C04B35/00—Shaped ceramic products characterised by their composition; Ceramics compositions; Processing powders of inorganic compounds preparatory to the manufacturing of ceramic products
- C04B35/622—Forming processes; Processing powders of inorganic compounds preparatory to the manufacturing of ceramic products
- 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
- C04B35/6303—Inorganic additives
- C04B35/6306—Binders based on phosphoric acids or phosphates
- C04B35/6313—Alkali metal or alkaline earth metal phosphates
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- C04B35/00—Shaped ceramic products characterised by their composition; Ceramics compositions; Processing powders of inorganic compounds preparatory to the manufacturing of ceramic products
- C04B35/622—Forming processes; Processing powders of inorganic compounds preparatory to the manufacturing of ceramic products
- 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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- C04B2235/60—Aspects relating to the preparation, properties or mechanical treatment of green bodies or pre-forms
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Abstract
The invention discloses a clay pug for directly forming 3D ceramic printing, which comprises the following components in percentage by mass: the ceramic aggregate powder, the guar gum powder, the dispersing agent, the thickening agent and the deionized water are 180-185: 0.4-0.6: 1.0-1.5: 0.2-0.6: 40-70. In addition, also discloses a preparation method and application of the clay pug. The clay pug has high solid content and good shearing and thinning performance, is suitable for preparing a 3D printing ceramic device by a direct forming method, and can be gradually dried and solidified in the 3D printing process at room temperature, so that a given structure can be obtained without collapse, the printing precision is high, and the requirement of 3D printing direct forming can be well met.
Description
Technical Field
The invention relates to the technical field of 3D printing, in particular to a clay pug for directly forming 3D ceramic printing and a preparation method and application thereof.
Background
The 3D printing technology is a technology for manufacturing a three-dimensional product by adding materials layer by layer through a 3D printing device according to a designed 3D model, and this layer-by-layer stacking forming technology is also called additive manufacturing. 3D printing integrates a plurality of fields such as digital modeling technology, electromechanical control technology, information technology, material science, chemistry and the like, is one of rapid prototyping technologies, and is known as the core technology of the third industrial revolution.
The 3D printing material mainly includes plastic, metal, resin, rubber, ceramic, and the like. The ceramic material has the excellent characteristics of high strength, high hardness, high temperature resistance, low density, good chemical stability, corrosion resistance and the like, and is widely applied to the industries of aerospace, automobiles, biology and the like. However, ceramic materials are particularly difficult to machine due to their hard and brittle nature. Unlike materials such as metal and plastic, ceramic materials cannot be formed by combining ceramic powder in a 3D forming process. Therefore, the ceramic material for 3D printing, which is currently usually a mixture of ceramic powder and a certain binder, is classified into the following 3D printing methods according to the process:
(1) a layer-by-layer bonding method, namely spraying binder powder onto a ceramic powder bed to be formed by using a nozzle, and heating and curing the powder to be cured on the layer by using laser sintering; then a layer of powder is paved again, the binder powder is sprayed, the process is repeated, and finally the powder without the binder is removed, so that the three-dimensional object can be obtained.
(2) The direct molding method is to mix ceramic powder and a binder to prepare ceramic slurry, and to directly form a certain shape by extrusion and stacking during 3D printing.
In the layer-by-layer bonding method, since the melting point of the binder powder is low, the ceramic powder is bonded only by melting the binder powder during laser sintering. After laser sintering, the ceramic product needs to be put into a temperature control furnace and post-treated at a higher temperature. The ratio of the ceramic powder and the binder powder influences the performance of the ceramic parts. The binder powder has a large amount, sintering is easy, but the size precision of the part is influenced due to a large shrinkage ratio of the part in the post-treatment process; if the amount of the binder powder is small, the binder powder is not easily sintered and molded. The ceramic powder has large liquid phase surface tension when the laser is directly and rapidly sintered, and can generate larger thermal stress in the rapid solidification process, thereby easily forming more microcracks.
Direct forming methods allow direct printing to obtain more complex shapes, such as closed cell structures, than layer-by-layer bonding methods (for layer-by-layer bonding methods, such shapes are not obtained because the uncured powder in the middle cannot be removed). However, the pug used in the direct forming method needs to have better shear thinning performance, namely, lower viscosity when 3D printing extrusion is carried out; after extrusion, the viscosity rapidly increases to be able to keep the sample in a certain shape without collapsing, thereby maintaining the profile of the 3D print. The clay ceramic material has good plasticity and cohesiveness, and has obvious advantages when being used as a ceramic aggregate for direct forming of 3D printing; however, the structure of clay itself makes it require more water to be adsorbed to achieve flow, which results in a lower slurry solids content, difficult curing and forming, and easy collapse of 3D prints. Therefore, the thixotropy problem of clay ceramic slurry needs to be solved by the 3D printing direct forming taking clay as ceramic aggregate. This is also the reason why the direct rapid ceramic forming process is not mature at present and is still in the research stage.
Disclosure of Invention
The invention aims to overcome the defects of the prior art and provide the clay pug for directly forming the 3D ceramic printing, which has high solid content and good thinning shearing performance, so that the clay pug is easy to be cured and formed and has high printing precision, and the requirement of directly forming the 3D printing is well met. The invention also aims to provide a preparation method and application of the clay pug for directly forming the 3D ceramic printing.
The purpose of the invention is realized by the following technical scheme:
the invention provides a clay pug for directly forming 3D ceramic printing, which comprises the following components in percentage by mass: ceramic aggregate powder, guar gum powder, a dispersing agent, a thickening agent and deionized water, wherein the ratio of the ceramic aggregate powder to the guar gum powder to the dispersing agent to the thickening agent to the deionized water is 180-185: 0.4-0.6: 1.0-1.5: 0.2-0.6: 40-70; the ceramic aggregate powder comprises the following components in percentage by weight: clay ceramic powder 70-100%, calcite 0-4%, albite 0-2%, talcum 0-5%, alpha-Al2O3 0～16.5％、BaCO3 0～1％、SiO2 0～1.8％。
According to the invention, clay ceramic powder is used as a raw material of ceramic aggregate powder, and calcite, albite, talcum and alpha-Al can be added according to the required calcination temperature of the 3D ceramic printing device2O3、BaCO3、SiO2One or a combination thereof.
In the scheme, the clay ceramic powder is kaolin and/or montmorillonite calcined at high temperature to remove organic matters in the kaolin and/or montmorillonite. The average particle size of the clay ceramic powder is 0.5-1 μm.
Further, the dispersing agent is one or a combination of sodium polyphosphate, ammonium polyacrylate with the viscosity of 300-3000 mPa & s, DISPERSANT8400AL-G and sodium phosphate. The thickening agent is one or a combination of sodium carboxymethylcellulose, polyvinyl alcohol, ammonium polyacrylate with the viscosity of 3000-300000 mPa & s, polyethylene glycol 4000, polyethylene glycol 6000 and polyethylene glycol 10000.
The other purpose of the invention is realized by the following technical scheme:
the invention provides a preparation method of the clay pug for directly forming 3D ceramic printing, which comprises the following steps:
(1) uniformly mixing the dispersing agent and deionized water to obtain a dispersing agent solution;
(2) adding the ceramic aggregate powder into a dispersant solution, and uniformly mixing to obtain a suspension A;
(3) adding the guar gum powder into the suspension A to form a suspension B;
(4) and adding the thickening agent into the suspension B to obtain the directly-formed clay pug for 3D ceramic printing, wherein the solid content of the clay pug is 67-75%.
The invention provides an application of the clay pug for directly forming 3D ceramic printing, which is used for directly forming a 3D printing ceramic device and comprises the following steps:
(1) filling the clay pug into a charging barrel of 3D printing equipment, and vacuumizing to remove bubbles in the pug;
(2) the charging barrel is arranged in the 3D printing equipment and is connected with a needle cylinder for extruding pug;
(3) connecting the charging barrel with a compressed air device, and controlling the extrusion rate by adjusting the pressure of compressed air;
(4) controlling the extrusion position of pug by using a three-dimensional structure model in 3D printing equipment, and obtaining a green body of the ceramic device by arranging and stacking extruded pug strips;
(5) and drying the green body, and calcining to obtain the ceramic device.
Further, the diameter of the needle head of the needle cylinder in the step (2) in the application of the invention is 0.1-1 mm. And (4) adjusting the pressure of the compressed air in the step (3) within the range of 0-1.5 MPa. In the step (5), the drying temperature of the green body is 100-120 ℃, and the calcining temperature is 1160-1450 ℃ according to the composition of the ceramic aggregate powder.
The invention has the following beneficial effects:
(1) the solid content of the clay mud is high (not less than 67%), the mud can be gradually dried and solidified in the 3D printing process under the room temperature condition, a set structure can be obtained without special solidification conditions to realize direct molding, and the problem of thixotropy of clay ceramic slurry is well solved.
(2) The clay mud has good shear thinning performance, can pass through a pinhole with the diameter of 0.5mm under the drive of 0.2MP pressure, and does not break. After extrusion, the viscosity of the pug is increased sharply, the pug can be stacked to a height of 5cm (0.5mm pug strips are stacked in a single layer mode) without collapse, the printing precision is high, and the requirement of direct forming can be well met.
(3) The preparation method is simple and easy to implement, the clay pug is used for direct forming 3D printing, the contradiction between the printing speed and the printing precision can be coordinately solved by adjusting the pressure of compressed air and the diameter of the needle head of the needle cylinder, and the control method is simple and reliable.
Drawings
The invention will now be described in further detail with reference to the following examples and the accompanying drawings:
FIG. 1 is a photograph of a ceramic device according to a first embodiment of the present invention;
FIG. 2 is a scanning electron micrograph of a ceramic device obtained according to an embodiment of the present invention;
FIG. 3 is a second SEM photograph of a ceramic device obtained according to an embodiment of the present invention.
Detailed Description
The first embodiment is as follows:
1. the preparation method of the clay pug for directly forming the 3D ceramic printing comprises the following steps:
(1) dissolving 1g of sodium polyphosphate in 60g of deionized water, and uniformly mixing to obtain a dispersant solution;
(2) 183g of calcined kaolin (d50 ═ 0.5 μm) was gradually added to the dispersant solution under high-speed stirring (4000rpm) and mixed uniformly to obtain suspension a;
(3) adding 0.488g of guar gum powder to suspension A, also under high speed stirring, to form suspension B;
(4) and adding 0.244g of sodium carboxymethylcellulose (with the viscosity of 300-800 mPa · s) into the suspension B, and continuously stirring for 60min to obtain the clay paste for directly forming the 3D ceramic printing, wherein the solid content of the clay paste is 74.8%.
2. The application of the clay pug for directly forming the 3D ceramic printing is used for directly forming a 3D printing ceramic device and comprises the following steps:
(1) the clay pug is put into a charging barrel of 3D printing equipment, and is vacuumized for 30min to remove bubbles in the pug;
(2) the charging barrel is arranged in 3D printing equipment and is connected with a needle cylinder for extruding pug, and the diameter of a needle head of the needle cylinder is 0.5 mm;
(3) connecting the charging barrel with a compressed air device, and adjusting the pressure of compressed air to 0.2 MPa;
(4) controlling the extrusion position of pug by using a three-dimensional structure model in 3D printing equipment, and obtaining a green body of the ceramic device by arranging and stacking extruded pug strips;
(5) and (3) drying the green body in an oven at 100-120 ℃ for 120min, and then calcining at 1350 ℃ for 1h to obtain the ceramic device, wherein the wall thickness is 0.5mm, and the height is 5cm as shown in figure 1.
Example two:
1. the preparation method of the clay pug for directly forming the 3D ceramic printing comprises the following steps:
(1) dissolving 1g of sodium polyphosphate in 60g of deionized water, and uniformly mixing to obtain a dispersing agent solution;
(2) 180g of ceramic aggregate powder (comprising 70 percent of kaolin, 4 percent of calcite, 2 percent of albite, 5 percent of talcum and alpha-Al in percentage by weight)2O3 16.5％、BaCO3 1％、SiO21.5 percent) and gradually added into a dispersant solution to be uniformly mixed under the condition of high-speed stirring (4000rpm) to obtain a suspension A;
(3) adding 0.50g of guar gum powder to the suspension A under high-speed stirring to form a suspension B;
(4) and adding 0.25g of sodium carboxymethylcellulose (with the viscosity of 300-800 mPa · s) and 0.35g of polyvinyl alcohol 1799 into the suspension B, and continuously stirring for 60min to obtain the clay pug for directly forming the 3D ceramic printing, wherein the solid content of the clay pug is 74.3%.
2. The application of the clay pug for directly forming the 3D ceramic printing is used for directly forming a 3D printing ceramic device and comprises the following steps:
(1) the clay pug is put into a charging barrel of 3D printing equipment, and is vacuumized for 30min to remove bubbles in the pug;
(2) the charging barrel is arranged in 3D printing equipment and is connected with a needle cylinder for extruding pug, and the diameter of a needle head of the needle cylinder is 0.8 mm;
(3) connecting the charging barrel with a compressed air device, and adjusting the pressure of compressed air to 0.2 MPa;
(4) controlling the extrusion position of pug by using a three-dimensional structure model in 3D printing equipment, and obtaining a green body of the ceramic device by arranging and stacking extruded pug strips;
(5) and (3) drying the green body in an oven at 100-120 ℃ for 120min, and calcining at 1280 ℃ for 1h to obtain the ceramic device.
The mud strips in the embodiment of the invention are arranged and stacked, and can be arranged in parallel (see figure 2) or vertically (see figure 3).
Claims (2)
1. A preparation method of clay pug for directly forming 3D ceramic printing is characterized by comprising the following steps: the clay pug comprises the following components in percentage by mass: ceramic aggregate powder, guar gum powder, a dispersing agent, a thickening agent and deionized water, wherein the ratio of the ceramic aggregate powder to the guar gum powder to the dispersing agent to the thickening agent to the deionized water is 180-185: 0.4-0.6: 1.0-1.5: 0.2-0.6: 40-70; the ceramic aggregate powder comprises the following components in percentage by weight: 70-100% of high-temperature calcined kaolin and/or montmorillonite with average particle size of 0.5-1 mu m, 0-4% of calcite, 0-2% of albite, 0-5% of talc and alpha-Al2O3 0～16.5%、BaCO3 0～1%、SiO2 0 to 1.8 percent; the dispersant is sodium polyphosphate and viscosityOne or a combination of 300-3000 mPa & s ammonium polyacrylate and sodium phosphate; the thickening agent is one or a combination of sodium carboxymethylcellulose, polyvinyl alcohol, ammonium polyacrylate with the viscosity of 3000-300000 mPa & s, polyethylene glycol 4000, polyethylene glycol 6000 and polyethylene glycol 10000; the preparation method comprises the following steps:
(1) uniformly mixing the dispersing agent and deionized water to obtain a dispersing agent solution;
(2) adding the ceramic aggregate powder into a dispersant solution, and uniformly mixing to obtain a suspension A;
(3) adding the guar gum powder into the suspension A to form a suspension B;
(4) and adding the thickening agent into the suspension B to obtain the clay pug with shear thinning performance for directly forming the 3D ceramic printing, wherein the solid content of the clay pug is 67-75%.
2. Use of a clay paste for direct structuring 3D ceramic printing, characterized in that the clay paste is prepared by the preparation method of claim 1, for direct structuring 3D printed ceramic devices, comprising the steps of:
(1) filling the clay pug into a charging barrel of 3D printing equipment, and vacuumizing to remove bubbles in the pug;
(2) the charging barrel is arranged in 3D printing equipment and is connected with a needle cylinder which is used for extruding pug and has a needle head diameter of 0.1-1 mm;
(3) connecting the charging barrel with a compressed air device, and controlling the extrusion rate by adjusting the pressure of compressed air to 0.2-1.5 MPa;
(4) controlling the extrusion position of pug by using a three-dimensional structure model in 3D printing equipment, and obtaining a green body of the ceramic device by arranging and stacking extruded pug strips;
(5) and drying the green body at the temperature of 100-120 ℃, and calcining at the temperature of 1160-1450 ℃ to obtain the ceramic device.
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