Dumping and sintering process for 3D printing ceramic body

A ceramic body, 3D printing technology, applied in the field of additive manufacturing, can solve the problems of uneven composition, complex origin of clay minerals, plasticity, thixotropic bonding, shrinkage and refractory differences, etc., and achieve uniform dimensional shrinkage. , The effect of good surface quality and excellent mechanical properties

Active Publication Date: 2017-01-11
江苏先进无机材料研究院
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  • Abstract
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AI Technical Summary

Problems solved by technology

However, due to the complex origin and uneven composition of clay minerals, the properties of plasticity, thixotropy, bonding, shrinkage, and refr

Method used

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  • Dumping and sintering process for 3D printing ceramic body
  • Dumping and sintering process for 3D printing ceramic body
  • Dumping and sintering process for 3D printing ceramic body

Examples

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Embodiment 1

[0031] Using three-dimensional light curing technology to print alumina ceramic tube, the solid content of the ceramic body is 60%, the size of the ceramic tube is 12mm in outer diameter, 8mm in inner diameter, and 60mm in length. Figure 1a Shown. Choose amorphous alumina powder and place it in a boat-shaped alumina crucible (such as Figure 1b (Shown) spread a layer of alumina powder on the bottom, then put the ceramic tube body into the crucible, fill the ceramic tube with alumina powder, and then bury the ceramic tube body in the alumina powder, such as figure 2 Shown. Put the boat-shaped alumina crucible into the muffle furnace, close to the position of the furnace thermocouple. The temperature is raised to 200°C in 7 hours, and the temperature is raised to 500°C in 10 hours, and the temperature is kept at 500°C for 1 hour. The temperature is raised to 1100°C in 20 hours and the temperature is kept for 4 hours. After cooling to room temperature, take out the crucible, cle...

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PUM

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Abstract

The invention relates to a dumping and sintering process for a 3D printing ceramic body. The process comprises the steps that 1, the ceramic body with the 3D printing solid content being 20-95 wt.% is placed into a crucible, and raw material powder with the same component as the ceramic body is used for embedding and filling the ceramic body; 2, the crucible which contains the ceramic body is placed into a muffle furnace, and segmented dumping is carried out in an air atmosphere; 3, the temperature is raised to sintering temperature at the temperature rise rate of 1-3 DEG C per minute, and sintering time is 1-12 hours, wherein the densification temperature is 300-1,000 DEG C lower than the sintering temperature of the ceramic body. The raw material powder with the same component as the ceramic body is used for embedding and filling the ceramic body, the raw material powder needs to wrap the ceramic body, and holes and other hollow structures in the ceramic body need to be filled with the raw material powder so that the ceramic body can be heated uniformly and slowly to prevent sudden change of temperature, prevent internal stress from being generated inside the ceramic body and reduce the probability of collapse.

Description

Technical field [0001] The invention belongs to the technical field of additive manufacturing, and particularly relates to a debinding and sintering process for a 3D printed ceramic body. Background technique [0002] Because ceramic materials have the advantages of corrosion resistance, high temperature resistance, environmental friendliness, and high mechanical strength, they have a very wide range of applications in the field of energy-saving and emission-reduction functional devices, and are currently widely used materials in the field of energy-saving and emission reduction. However, due to the high temperature and brittleness of the ceramic material itself, it is difficult to prepare ceramic devices with complex shapes and thin-walled hollow by traditional molding methods. 3D printing has the characteristics of short manufacturing cycle, suitable for individualized manufacturing of a single piece, one-time molding, and saving raw materials. Therefore, it has the advantages ...

Claims

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Application Information

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IPC IPC(8): C04B35/10C04B35/64C04B35/638
CPCC04B35/10C04B35/638C04B35/64C04B2235/6026C04B2235/6562C04B2235/6567C04B2235/658
Inventor 张明辉温海琴刘岩艾飞于惠梅潘秀红汤美波盖立君雷磊邓伟杰陈锟
Owner 江苏先进无机材料研究院
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