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A debinding and sintering process of 3D printing ceramic body

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

Active Publication Date: 2019-05-14
江苏先进无机材料研究院
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  • Abstract
  • Description
  • Claims
  • Application Information

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 refractoriness are quite different. Therefore, there are differences in the formula and process of ceramic blanks in various ceramic production areas.

Method used

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  • A debinding and sintering process of 3D printing ceramic body
  • A debinding and sintering process of 3D printing ceramic body
  • A debinding and sintering process of 3D printing ceramic body

Examples

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Embodiment 1

[0031] Using stereolithography to print alumina ceramic tubes, the solid content of the ceramic body is 60%, and the size of the ceramic tubes is 12mm in outer diameter, 8mm in inner diameter, and 60mm in length, such as Figure 1a shown. Select amorphous alumina powder, in a boat-shaped alumina crucible (such as Figure 1b As shown) spread a layer of alumina powder on the bottom, then put the ceramic tube blank into the crucible, fill the ceramic tube with alumina powder, and then bury the ceramic tube blank in the alumina powder, as figure 2 shown. Place the boat-shaped alumina crucible in the muffle furnace, close to the position of the furnace thermocouple. Raise the temperature to 200°C in 7 hours, then raise the temperature to 500°C in 10 hours and keep the temperature for 1 hour, then raise the temperature to 1100°C in 20 hours and keep the temperature for 4 hours, and finally cool with the furnace, the atmosphere is air atmosphere. After cooling to room temperature,...

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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 in particular relates to a debinding and sintering process of a 3D printed ceramic body. Background technique [0002] Due to the advantages of corrosion resistance, high temperature resistance, environmental friendliness, and high mechanical strength, ceramic materials are widely used in the field of energy-saving and emission-reduction functional devices, and are also commonly used materials in the field of energy-saving and emission-reduction. However, due to the characteristics of high temperature and brittleness of ceramic materials, it is difficult to prepare ceramic devices with complex shapes, thin walls and hollows by traditional molding methods. 3D printing has the characteristics of short manufacturing cycle, suitable for single-piece personalized manufacturing, one-time molding, and saving raw materials. Big advantage. 3D printing technology refers to the technolo...

Claims

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Application Information

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Patent Type & Authority Patents(China)
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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