Photocuring 3D printing SiCN ceramic precursor material and its application

A ceramic precursor, 3D printing technology, applied in the direction of ceramic molding machine, additive processing, manufacturing tools, etc., can solve the problems of difficult control of solidification thickness, influence of ceramic performance, and reduction of printing accuracy, and achieve good mechanical properties and reliability , Improve toughness and improve printing accuracy

Active Publication Date: 2021-12-10
NAT UNIV OF DEFENSE TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] The photocurable precursor system has high activity and is sensitive to light. During the 3D printing process, sufficient exposure and crosslinking of the liquid precursor makes it difficult to control the curing thickness, and the weak light at the edge of the irradiation can also cause a certain degree of crosslinking and curing of the photosensitive resin. , leading to a decrease in printing accuracy
Light-curing 3D printing usually uses pigments to improve printing accuracy, but the introduction of pigments causes impurity elements in ceramics, which affects all aspects of ceramic performance

Method used

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  • Photocuring 3D printing SiCN ceramic precursor material and its application
  • Photocuring 3D printing SiCN ceramic precursor material and its application
  • Photocuring 3D printing SiCN ceramic precursor material and its application

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0041] Add solid polysilazane ceramic precursor, liquid polycarbosilane precursor, and n-hexane in a weight ratio of 50:15:25, stir at room temperature for 4 hours until the solid polysilazane precursor is fully dissolved, and obtain a modulated liquid precursor Then by modulation liquid precursor: the ratio of acrylic acid active monomer weight ratio is 3:1 to add acrylic acid active monomer, the weight ratio of hexanediol diacrylic acid and pentaerythritol triacrylate in the acrylic acid active monomer is 2:1, finally Add 1% photoinitiator, 0.5% carbon nanotube light absorber, 1% leveling agent and defoamer according to the total mass percentage of all added components, and stir overnight at room temperature.

[0042] Transfer the configured photocurable precursor material to the resin tank of the photocurable 3D printer, import the periodic lattice structure model, set the printing layer thickness to 50 microns, and the printer is under the control of the designed printing p...

Embodiment 2

[0046] Add solid polysilazane ceramic precursor, liquid polycarbosilane precursor, and n-hexane in a weight ratio of 50:15:25, stir at room temperature for 4 hours until the solid polysilazane precursor is fully dissolved, and obtain a modulated liquid precursor Then by modulation liquid precursor: the ratio of acrylic acid active monomer weight ratio is 3:1 to add acrylic acid active monomer, the weight ratio of hexanediol diacrylic acid and pentaerythritol triacrylate in the acrylic acid active monomer is 2:1, finally Add 1% photoinitiator, 0.1-0.7% carbon nanotube light absorber, 1% leveling agent and defoamer according to the total mass percentage of all added components, and stir overnight at room temperature.

[0047] Transfer the photocurable precursor materials with different contents of carbon nanotube light absorbers to the resin tank of the photocurable 3D printer, and irradiate them for 0-20s respectively, and the thickness changes as follows: Figure 5 As shown, (...

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Abstract

The present invention provides a light-curing 3D printing SiCN ceramic precursor material, which comprises the following components in weight percentage: modulated liquid precursor 40-75%, acrylic acid active monomer 20-65%, photoinitiator 0.1-5% , 0.1-1% of the light absorber, 0.1-2% of the leveling agent, and 0.1-2% of the defoamer, wherein the light absorber is carbon nanotube. It also provides a method for obtaining SiCN ceramic materials by using it for photocuring 3D printing. The formula of the present invention does not need to add solid components such as ceramic powder and clay. There are no impurity elements in the product, and the ceramic yield is high, which is suitable for the rapid preparation of SiCN ceramic products with high-precision special-shaped structures and periodic complex structures.

Description

technical field [0001] The present invention generally relates to the technical field of 3D printing ceramic precursors, and in particular to a light-cured 3D printing SiCN ceramic precursor material and its application. Background technique [0002] Today, ceramic materials have high mechanical strength and hardness, good thermal stability, corrosion resistance and electromagnetic properties, and are widely used in aerospace, new energy, high-temperature camouflage and stealth, and biomedical fields. Traditional ceramic material processing technologies are mainly injection molding, molding, etc. These molding processes are expensive and have a long cycle, which limits our use of the excellent performance of ceramic materials. Compared with other materials, due to the extremely high hardness and brittleness of ceramic materials, processing is extremely difficult, especially for high-precision special-shaped structures and periodic complex structures, not to mention the diffi...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C04B35/58C04B35/634B28B1/00B33Y10/00B33Y70/00
CPCC04B35/58C04B35/63404B28B1/001B33Y70/00B33Y10/00C04B2235/483C04B2235/77C04B2235/6026
Inventor 程海峰肖俊刘东青祖梅
Owner NAT UNIV OF DEFENSE TECH
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