Photocuring 3D printing SiCN ceramic precursor material and application thereof

A ceramic precursor, 3D printing technology, used in ceramic molding machines, additive processing, manufacturing tools, etc., can solve the problems of reduced printing accuracy, influence of ceramic performance, difficult to control curing thickness, etc., to improve printing accuracy and toughness. , the effect of good mechanical properties and reliability

Active Publication Date: 2019-11-15
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 application thereof
  • Photocuring 3D printing SiCN ceramic precursor material and application thereof
  • Photocuring 3D printing SiCN ceramic precursor material and application thereof

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 invention provides a photocuring 3D printing SiCN ceramic precursor material. The precursor material comprises, by weight percentage, 40-75% of a prepared liquid precursor, 20-65% of acrylic active monomers, 0.1-5% of a photoinitiator, 0.1-1% of a light absorber, 0.1-2% of a leveling agent and 0.1-2% of a defoaming agent, wherein the light absorber is a carbon nanotube. A method of applying the precursor material in photocuring 3D printing to obtain a SiCN ceramic material is also provided. According to a formula, it is not needed to add solid components such as ceramic powder and clay. Aproduct has no impurity elements, the ceramic yield is high, and the precursor material is suitable for rapidly preparing SiCN ceramic products of high-precision special-shaped structures and periodiccomplex 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 Applications(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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