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3D printing preparation method and device for heterogeneous bidirectional gradient aperture porous ceramic

A technology of 3D printing and porous ceramics, which is applied to ceramic products, ceramic molding machines, manufacturing tools, etc. It can solve the problems of micro-cracks, splitting, shrinkage and deformation of photosensitive resin in the porous layer, and achieve short production cycle, increase strength, eliminate Effect of localized microcracks

Active Publication Date: 2022-04-05
JILIN UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, in the process of photo-curing 3D printing, pores formed by the evaporation of the slurry solution will appear locally, and the photosensitive resin will also shrink, deform, and split during the degreasing and sintering process of the formed porous skeleton, resulting in microcosmic voids between the pore layers. microcracks

Method used

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  • 3D printing preparation method and device for heterogeneous bidirectional gradient aperture porous ceramic
  • 3D printing preparation method and device for heterogeneous bidirectional gradient aperture porous ceramic
  • 3D printing preparation method and device for heterogeneous bidirectional gradient aperture porous ceramic

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Experimental program
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Effect test

Embodiment 1

[0044] First prepare the first precursor ceramic slurry and the second precursor ceramic slurry, specifically, the components of the first precursor ceramic slurry are 70wt% of photosensitive resin, 15wt% of silicon carbide powder, particle size is 4000 mesh, amorphous Silicon powder 5wt%, particle size 5000 mesh, alumina and yttrium oxide 4wt%, KOS110 2wt%. The second precursor ceramic slurry components are photosensitive resin 70wt%, silicon carbide powder 10wt%, particle size 4000 mesh, amorphous silicon powder 10wt%, particle size 5000 mesh, alumina and yttrium oxide 4wt%, KOS110 2wt%. And mechanically stirred for 1 hour at a rotational speed of 2000r / min, respectively, and placed in the first resin liquid tank 11 and the second resin liquid tank 12 . Secondly, the two-way gradient porous structure was designed through the SolidWorks 3D modeling software, and the STL format file was exported to the light-curing slicing software ChiTuBox. The slice thickness was set to 30 ...

Embodiment 2

[0059] First prepare the first precursor ceramic slurry and the second precursor ceramic slurry, specifically, the components of the first precursor ceramic slurry are photosensitive resin 70wt%, silicon carbide powder 15wt%, particle size 3000 mesh, amorphous Silicon powder 5wt%, particle size 4000 mesh, alumina and yttrium oxide 4wt%, KOS110 2wt%. The components of the second precursor ceramic slurry are photosensitive resin 70wt%, silicon carbide powder 10wt%, particle size 6000 mesh, amorphous silicon powder 10wt%, particle size 6000 mesh, alumina and yttrium oxide 4wt%, KOS110 2wt%. And mechanically stirred for 1 hour at a rotational speed of 2000r / min, respectively, and placed in the first resin liquid tank 11 and the second resin liquid tank 12 . Secondly, the bidirectional gradient porous structure was designed by the SolidWorks 3D modeling software, and the STL format file was exported to the light-curing slicing software ChiTuBox. The slice thickness was set to 50 m...

Embodiment 3

[0063] First prepare the first precursor ceramic slurry and the second precursor ceramic slurry. Specifically, the components of the first precursor ceramic slurry are 65wt% of photosensitive resin, 15wt% of silicon nitride powder, and the particle size is 3500 mesh. Shaped silicon powder 5wt%, particle size 4500 mesh, alumina and yttrium oxide 5wt%, KOS110 5wt%. The components of the second precursor ceramic slurry are 70wt% photosensitive resin, 10wt% silicon nitride powder with a particle size of 5000 mesh, 10wt% amorphous silicon powder with a particle size of 5500 mesh, 4wt% each of alumina and yttrium oxide, KOS110 2wt%. And mechanically stirred for 1 hour at a rotational speed of 2000r / min, respectively, and placed in the first resin liquid tank 11 and the second resin liquid tank 12 . Secondly, the two-way gradient porous structure was designed through the SolidWorks 3D modeling software, and the STL format file was exported to the light-curing slicing software ChiTuB...

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Abstract

The invention discloses a 3D printing preparation method and device for heterogeneous bidirectional gradient aperture porous ceramics, and belongs to the technical field of 3D printing of functional materials, gradient aperture functional materials are combined with an additive manufacturing technology, and alternate change of all layers of materials is achieved by controlling photocuring slurry, so that the 3D printing preparation method is suitable for 3D printing of the functional materials. Wherein the amorphous silicon powder content of the first precursor ceramic slurry is smaller than that of the second precursor ceramic slurry, so that the thermal expansion coefficient of the first precursor ceramic slurry is slightly higher than that of the second precursor ceramic slurry, pressure stress can be generated between pore layers after sintering, and the strength of the gradient aperture porous ceramic can be improved. In addition, the silicon powder can react with carbon residues generated by the photosensitive resin to be sintered, so that the green body is densified, and local microcracks between pore layers are effectively eliminated. In addition, the particle size of the silicon powder is changed, the macropores are controllable, meanwhile, the micropores are variable, and the functionality of the gradient aperture porous ceramic is further improved.

Description

technical field [0001] The invention belongs to the technical field of functional materials and 3D printing, and specifically relates to a 3D printing preparation method and device for heterogeneous bidirectional gradient aperture porous ceramics. Background technique [0002] Compared with traditional porous ceramic materials, gradient porous ceramics are new functional materials whose pore size changes regularly from one direction to another to meet higher specific requirements. Its asymmetric pore structure has higher filtration accuracy and air permeability coefficient. And mechanical strength and other characteristics, especially suitable for high temperature flue gas dust removal, corrosive mixed fluid separation and fine particle filtration and other fields. [0003] At present, the preparation technology of gradient porous ceramics mainly includes centrifugal molding method, organic template impregnation method, particle accumulation method, etc. Thus, the formed po...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C04B35/577C04B35/596C04B35/622C04B38/00B28B1/00B33Y70/10B33Y10/00B33Y30/00
Inventor 商震田丽梅李子源王欢任露泉
Owner JILIN UNIV
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