A method suitable for self-healing/self-reinforcing 3D-printed ceramic parts based on stereolithography

A light-curing molding and 3D printing technology, which is applied in the direction of additive processing, can solve the problem of low solid phase content, achieve high density, increase the density of green bodies, and repair microscopic cracks

Active Publication Date: 2021-03-16
GUANGDONG UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, after degreasing the ceramic parts prepared by photocuring molding, many microscopic defects are easily produced inside; and in the actual molding process, in order to ensure the shape accuracy, the solid phase content of the ceramic photocuring slurry used (ceramic The ratio of powder to light-cured slurry) is generally low, resulting in the density of the green body after degreasing is often lower than that of the ceramic green body prepared by the traditional method

Method used

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  • A method suitable for self-healing/self-reinforcing 3D-printed ceramic parts based on stereolithography
  • A method suitable for self-healing/self-reinforcing 3D-printed ceramic parts based on stereolithography
  • A method suitable for self-healing/self-reinforcing 3D-printed ceramic parts based on stereolithography

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0121] (1) Green body preparation

[0122] The photocurable premix is ​​prepared with ethoxylated pentaerythritol tetraacrylate, methyl amyl alcohol, polydimethylsiloxane, etc. in a ratio of 100:2:2, and then mixed with alumina ceramic powder at a solid content of 36 vol% (i.e. The ceramic powder accounts for the volume ratio of the photocurable ceramic slurry) and is mixed to prepare the alumina photocurable slurry. The main process parameters of photo-curing were optimized and selected, the exposure time was 6s, the layer thickness was 10 μm, and then the photo-cured ceramic slurry was subjected to photo-curing treatment, and the obtained alumina body was first subjected to vacuum degreasing, and then air degreasing, and the heating rate was uniform. The temperature is 5°C / min, the maximum temperature is 650°C, and the holding time is 2h. Then pre-sintering treatment is carried out, the pre-sintering temperature is 1100°C, the heating rate is 5°C / min, and the holding time i...

Embodiment 2

[0133] Example 2 Zirconia

[0134] (1) Green body preparation

[0135] The light-curing premix is ​​prepared with ethoxylated pentaerythritol tetraacrylate, methyl amyl alcohol, polydimethylsiloxane, etc. in a ratio of 100:2:2, and then mixed with alumina ceramic powder at a solid content of 37 vol% (i.e. The ceramic powder accounts for the volume ratio of the photocurable ceramic slurry) and is mixed to prepare the zirconia photocurable slurry. The main process parameters of photo-curing were optimized and selected, the exposure time was 6s, the layer thickness was 10 μm, and then the photo-cured ceramic slurry was subjected to photo-curing treatment, and the obtained alumina body was first subjected to vacuum degreasing, and then air degreasing, and the heating rate was uniform. The temperature is 5°C / min, the maximum temperature is 650°C, and the holding time is 2h. Then pre-sintering treatment is carried out, the pre-sintering temperature is 1100°C, the heating rate is 5...

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Abstract

The invention provides a method for stereolithography-based 3D printing ceramic component suitable for self repair / self enhancement. The method comprises the following steps: (A) performing pre-sintering or cold isostatic pressing on a multi-hole 3D printing ceramic body subjected to stereolithography; placing the processed multi-hole 3D printing ceramic body in impregnation liquid of cationic salt corresponding to the ceramic, and performing self impregnation; adding an alkaline solution, performing home position precipitation, and performing drying, so as to obtain the body subjected to selfimpregnation and home position precipitation, wherein the impregnation liquid is a 0.1-10 mol / L cationic solution of ceramic elements corresponding to the multi-hole 3D printing ceramic body; (B) sintering the body after self impregnation and home position precipitation so as to obtain the 3D printing ceramic component suitable for self repair / self enhancement.

Description

technical field [0001] The invention belongs to the technical field of inorganic materials, and in particular relates to a method for self-healing / self-enhancing 3D printing ceramic parts based on photocuring molding. Background technique [0002] In addition to the structural ceramic characteristics of high temperature resistance, corrosion resistance, high strength, high hardness, high chemical stability and good biocompatibility, ceramic materials also have functional properties such as light transmission, wave transmission, and laser light transmission. It has been widely used in high-tech fields such as machinery, military industry, electronics, semiconductors, and medicine. However, the traditional ceramic preparation methods all have the problem of difficulty in forming complex-shaped parts, which limits the application of ceramic parts to a certain extent. Therefore, it is necessary to seek a simple and feasible preparation method for transparent ceramic complex part...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C04B41/85C04B35/10C04B35/48C04B35/632C04B35/634B33Y70/10
CPCB33Y70/00C04B35/10C04B35/48C04B35/632C04B35/634C04B41/4578C04B41/85C04B2235/6026C04B2235/608C04B2235/6562C04B2235/77C04B2235/96C04B41/4535
Inventor 何荣烜刘伟黄梅鹏伍海东伍尚华
Owner GUANGDONG UNIV OF TECH
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