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3D printing light-cured ceramic particle and preparation method thereof

A ceramic particle, 3D printing technology, applied in the field of ceramic 3D printing, can solve the problems of reducing the curing depth of the slurry, reducing the curing depth, and reducing the printing efficiency, so as to reduce the curing width, increase the curing depth, and improve the printing efficiency.

Inactive Publication Date: 2020-06-23
GUANGDONG INST OF NEW MATERIALS
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The larger the refractive index difference, the more obvious the scattering, because when the laser or ultraviolet light irradiates the interface between the ceramic powder and the photosensitive resin in the ceramic slurry, the energy of the incident light is weakened due to scattering, so the Sd decreases, so the curing depth decreases , so the printing efficiency decreases
At the same time, the greater the difference in refractive index between the ceramic particles and the photosensitive resin, the greater the impact of the interface scattering between the photosensitive resin and the ceramic particles, and the greater the incident energy loss of the laser, resulting in a decrease in the curing depth of the slurry and an increase in the curing width, reducing the 3D printing efficiency. Efficiency and Printing Accuracy
[0007] The absorption coefficient of ceramic powder has a significant impact on its curing performance (curing depth and curing width). The larger the absorption coefficient of ceramic powder, the lower the curing depth and curing width. However, there is currently no method to improve this problem.

Method used

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  • 3D printing light-cured ceramic particle and preparation method thereof
  • 3D printing light-cured ceramic particle and preparation method thereof
  • 3D printing light-cured ceramic particle and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0053] 1. Prepare raw materials

[0054] The ceramic powder raw material is selected as zirconia, the coated sintering aid is selected as alumina, the solvent is selected as ethanol, the dispersant is polyethylene glycol (PEG), and the precipitating agent is urea.

[0055] 2. Preparation of ceramic particles wrapped with sintering aid layer

[0056] Dissolve aluminum chloride / aluminum nitrate in ethanol, then add zirconia powder and dispersant PEG to the above solvent, and then add precipitant urea dropwise to the above solution, so that the aluminum hydroxide is evenly coated on the The zirconia surface is finally filtered, dried and calcined to obtain alumina-coated zirconia ceramic powder, wherein the thickness of the coating layer is 2nm.

Embodiment 2

[0058] 1. Prepare raw materials

[0059] The ceramic powder raw material is silicon nitride, the coating sintering aid is yttrium oxide and aluminum oxide, the solvent is ethanol, the dispersant is ammonium citrate, and the precipitant is urea.

[0060] 2. Preparation of ceramic particles wrapped with sintering aid layer

[0061] Dissolve yttrium nitrate and aluminum nitrate in solvent ethanol, then add silicon nitride powder and dispersant ammonium citrate to the above solution, and then add precipitant urea dropwise to the above solution, so that the hydroxide of yttrium and aluminum Evenly coated on the surface of silicon nitride, finally filtered, dried and calcined to obtain silicon nitride ceramic powder coated with yttrium oxide and aluminum oxide, wherein the thickness of the coating layer is 5nm.

Embodiment 3

[0063] 1. Prepare raw materials

[0064] The ceramic powder raw material is silicon nitride, the coated sintering aid is yttrium oxide and magnesium oxide, the solvent is ethanol, the dispersant is hyperdispersant, and the precipitant is triethanolamine.

[0065] 2. Preparation of ceramic particles wrapped with sintering aid layer

[0066] Dissolve yttrium nitrate and magnesium nitrate in solvent ethanol, then add silicon nitride powder and dispersant hyperdispersant to the above solvent, and then add the precipitant triethanolamine dropwise to the above solution to make the hydroxide of yttrium and aluminum The material is uniformly coated on the surface of silicon nitride, and finally filtered, dried, and calcined to obtain silicon nitride ceramic powder coated with yttrium oxide and magnesium oxide. The thickness of the coating layer is 8nm.

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Abstract

The invention provides a 3D printing light-cured ceramic particle and a preparation method thereof. The 3D printing photocuring ceramic particle comprises a ceramic matrix; wherein the surface of theceramic matrix is coated with a coating layer; and the coating layer is a sintering aid layer, and the sintering aid layer coats the ceramic matrix according to the decreasing order of the refractiveindexes of the sintering aid components. The 3D printing light-cured ceramic particle is prepared by a precipitation method, the thickness and components of the coating layer can be accurately controlled, and meanwhile, a proper coloring agent is added to adjust the light absorption coefficient, so that the 3D printing light-cured ceramic particle is more suitable for the requirements of a ceramiclight-cured molding technology.

Description

technical field [0001] The invention relates to the technical field of ceramic 3D printing, in particular to a 3D printing light-cured ceramic particle and a preparation method thereof. Background technique [0002] The specific fine structure of ceramics and its high strength, high hardness, wear resistance, corrosion resistance, high temperature resistance, electrical conductivity, insulation, magnetism, light transmission, semiconductor, piezoelectricity, ferroelectricity, acousto-optic, superconductivity, biocompatibility, etc. With excellent performance, it is widely used in various fields of national economy such as national defense, chemical industry, metallurgy, electronics, machinery, aviation, aerospace, biomedicine and so on. With the rapid development and maturity of modern industrial technology, the structural requirements of ceramic components are also getting higher and higher. As one of the important links in the preparation of ceramic structural parts, mate...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C04B35/628C04B35/64B33Y70/00
CPCB33Y70/00C04B35/62813C04B35/62823C04B35/62828C04B35/62831C04B35/62834C04B35/62836C04B35/62839C04B35/62886C04B35/64C04B2235/3208C04B2235/3217C04B2235/3224C04B2235/38
Inventor 李艳辉张欣悦王岳亮卢冰文董东东马文有李福海陈兴驰
Owner GUANGDONG INST OF NEW MATERIALS
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