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3D printing forming method based on ceramic material

A technology of 3D printing and forming method, which is applied in the field of ceramic 3D printing, can solve the problems of limited types of machinable ceramic powder, small size of prepared ceramic devices, complicated post-processing technology, etc., and achieves simple processing and forming process, improved efficiency, The effect of cost reduction

Pending Publication Date: 2022-03-22
WUHAN UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The above 3D printing methods for preparing ceramic devices all have problems such as limited types of ceramic powders that can be processed, small size of prepared ceramic devices, high processing costs, and complicated post-processing processes.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0029] 1) After the alumina ceramic powder is dried, it is ground and pulverized and sieved;

[0030] 2) Add high-density polyethylene, low-density polyethylene, paraffin, and amorphous polyolefin into a high-temperature mixer and knead at 180°C to form a premix. In the premix, the total volume of high-density polyethylene and low-density polyethylene Accounting for 60%, the volume ratio of the two is 5:5 The total volume of paraffin and amorphous polyolefin accounts for 40%, and the volume ratio of the two is 5:5;

[0031] 3) Add the ceramic powder obtained in step 1) and the dispersant stearic acid accounting for 2wt% of the ceramic powder to the above premix, and continue kneading at 180° C. for 1 hour to obtain the mixture;

[0032] 4) extruding, cooling, and granulating the mixed material obtained in step 3) to obtain a ceramic feeding material;

[0033] 5) Put the ceramic feed material obtained in step 4) into a single-screw extruder for extrusion, wire drawing and cool...

Embodiment 2

[0037] 1) After the silicon nitride ceramic powder is dried, it is ground, pulverized and sieved;

[0038] 2) Add high-density polyethylene, low-density polyethylene, paraffin, and amorphous polyolefin into a high-temperature mixer and knead at 170°C to form a premix. In the premix, the total volume of high-density polyethylene and low-density polyethylene Accounting for 70%, the volume ratio of the two is 7:3 The total volume of paraffin and amorphous polyolefin accounts for 30%, and the volume ratio of the two is 6:4;

[0039] 3) Add the ceramic powder obtained in step 1) and 2.5wt% oleic acid as a dispersant to the above premixed solution, and continue kneading at 170° C. for 1 hour to obtain a mixed material;

[0040] 4) extruding, cooling, and granulating the high-temperature mixture obtained in step 3) to obtain a ceramic feed;

[0041] 5) wire drawing: put the ceramic feed material obtained in step 4) into a single-screw extruder for extrusion, wire drawing and cooling...

Embodiment 3

[0045] 1) After drying the zirconia ceramic powder, it is ground and pulverized and sieved;

[0046] 2) Add high-density polyethylene, low-density polyethylene, paraffin, and amorphous polyolefin into a high-temperature mixer and knead at 160°C to form a premix. In the premix, the total volume of high-density polyethylene and low-density polyethylene Accounting for 50%, the volume ratio of the two is 6:4 The total volume of paraffin and amorphous polyolefin accounts for 50%, and the volume ratio of the two is 4:6;

[0047] 3) Add the ceramic powder obtained in step 1) and a dispersant of 5 wt% oleic acid and stearic acid in a mass ratio of 1:1 to the above premix, and continue to knead at 160°C for 1.5h to obtain a mixture ;

[0048] 4) extruding, cooling, and granulating the high-temperature mixture obtained in step 3) to obtain a ceramic feed;

[0049] 5) wire drawing: put the ceramic feed material obtained in step 4) into a single-screw extruder for extrusion, wire drawin...

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Abstract

The invention relates to the technical field of ceramic 3D printing, in particular to a 3D printing forming method based on a ceramic material, which comprises the following steps: mixing various raw materials in proportion to prepare a premixed solution; adding ceramic powder and a dispersing agent into the premixed liquid, and continuously mixing to obtain a mixed material; extruding, cooling and granulating the obtained mixed material to obtain a ceramic feed; performing extrusion, wire drawing and cooling on the obtained ceramic feed to obtain a ceramic wire for 3D printing; the obtained ceramic wire is used as a raw material, 3D printing machining forming is utilized, and a ceramic green body is prepared; and degreasing and sintering the prepared ceramic green body to obtain the final ceramic device. The 3D printing forming method based on the ceramic material is suitable for machining and forming of all ceramic powder, is a ceramic additive manufacturing technology with a wide application range, and overcomes the defect that 3D printing technologies such as photocuring are only suitable for a small part of ceramic powder.

Description

technical field [0001] The invention relates to the technical field of ceramic 3D printing, in particular to a 3D printing molding method based on ceramic materials. Background technique [0002] 3D printing technology (3D printing), also known as additive manufacturing technology (Additive manufacturing), is an emerging material processing and molding technology, which is suitable for the molding and processing of various complex shape devices. It has the advantages of no mold, free design, saving raw materials, High efficiency and environmental protection and other advantages. Ceramic materials have excellent performance and are widely used in aerospace, vehicle manufacturing, parts processing, micro-nano manufacturing and other fields. However, the hard and brittle nature of ceramic materials brings difficulties in processing and molding. Therefore, applying 3D printing technology to the processing and molding of ceramic materials can solve the difficulties in processin...

Claims

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Application Information

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IPC IPC(8): C04B35/10C04B35/48C04B35/584C04B35/622C04B35/632C04B35/634C04B35/638B33Y10/00B33Y70/10
CPCC04B35/10C04B35/584C04B35/48C04B35/622C04B35/63408C04B35/63496C04B35/632C04B35/638B33Y10/00B33Y70/10C04B2235/6026C04B2235/96
Inventor 徐晓虹周士翔吴建锋张亚祥
Owner WUHAN UNIV OF TECH
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