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3D printing ceramic preparation method and product thereof

A ceramic preparation and 3D printing technology, which is applied in the field of ceramic 3D printing, can solve problems such as easy cracks, increased difficulty of sintering, and different shrinkage rates in different directions.

Inactive Publication Date: 2020-10-20
CHINA UNIV OF GEOSCIENCES (WUHAN)
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

As far as the current situation of ceramic 3D printing is concerned, the development of ceramic 3D printing technology is not yet mature enough, and there are still many problems to be solved, such as how to configure ceramic slurry with low viscosity, good fluidity and uniform mixing
During the sintering process, defects such as cracks, deformation, and different shrinkage rates in the green body are prone to occur in the green body, which increases the difficulty of sintering

Method used

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  • 3D printing ceramic preparation method and product thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0024] like figure 1 As shown, 3.34g of polyethersulfone was slowly added to 10.02g of N-methyl-2-pyrrolidone solvent, and stirred at 70°C for 1.5h with a magnetic stirrer at 800r / min until the polyethersulfone was uniformly dissolved in Premix 1 was obtained in the solvent. Then 10.00 g of ceramic powder was added to premix 1 to obtain premix 2, and the magnetic stirrer was stirred at 65° C. for 12 hours at a constant temperature of 800 r / min to obtain a uniform ceramic slurry. Then use micro-flow extrusion forming equipment to carry out extrusion molding, print out the ceramic green body 1, immediately and slowly immerse the printed ceramic green body 1 in deionized water, and let it stand for 12 hours until the organic solvent and water exchange are completed, the green body Solidify and harden to get the ceramic green body 2 . All ceramic bodies 2 were then dried at 75° C. for 12 h. The dried ceramic body 2 was kept at 600°C for 3 hours to remove the binder polyethersul...

Embodiment 2

[0026] Slowly add 3.33g of polyethylene glycol into 10.10g of N-methyl-2-pyrrolidone solvent, and stir with a magnetic stirrer at 800r / min at 70°C for 1.5h until polyethersulfone is uniformly dissolved in the solvent to obtain premix 1. Then 10.00 g of ceramic powder was added to premix 1 to obtain premix 2, and the magnetic stirrer was stirred at 65° C. for 12 hours at a constant temperature of 800 r / min to obtain a uniform ceramic slurry. Then use micro-flow extrusion forming equipment to carry out extrusion molding, print out the ceramic green body 1, immediately and slowly immerse the printed ceramic green body 1 in deionized water, and let it stand for 12 hours until the organic solvent and water exchange are completed, the green body Solidify and harden to get the ceramic green body 2 . All ceramic bodies 2 were then dried at 75° C. for 12 h. The dried ceramic body 2 was kept at 550°C for 3 hours to remove the binder polyethylene glycol, and then calcined at 1250°C for...

Embodiment 3

[0028] Slowly add 4.10g of polyethersulfone into 12.30g of dimethylformamide solvent, and stir with a magnetic stirrer at 800r / min at 70°C for 1.5h until the polyethersulfone is uniformly dissolved in the solvent to obtain a premixed solution 1. Then 12.00 g of ceramic powder was added to premix 1 to obtain premix 2, and the magnetic stirrer was stirred at 65° C. for 12 hours at a constant temperature of 800 r / min to obtain a uniform ceramic slurry. Then use micro-flow extrusion molding equipment to carry out extrusion molding, print out the ceramic green body 1, immediately and slowly immerse the printed ceramic green body 1 in deionized water, and let it stand for 12 hours until the organic solvent and water exchange are completed, the green body Solidify and harden to get the ceramic green body 2 . All ceramic bodies 2 were then dried at 75° C. for 12 h. The dried ceramic body 2 was kept at 550°C for 3 hours to remove the binder polyethersulfone, and then calcined at 1300...

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Abstract

The invention discloses a 3D printing ceramic preparation method and a product thereof. The preparation method comprises the following steps: S1, adding ceramic powder into a mixed solution of a binder and an organic solvent, and uniformly stirring to obtain slurry; S2, subjecting the slurry to extrusion moulding through micro-flow extrusion moulding equipment to obtain a ceramic blank, immediately immersing the printed ceramic blank into an inorganic solution, and rapidly moulding, wherein the organic solvent and the inorganic solution are mutually soluble; S3, after the ceramic blank is cured and hardened, taking out and drying the ceramic blank; S4, removing the binder; and S5, calcining at a high temperature to obtain ceramic. The provided ceramic slurry has good fluidity and stability, and has a proper solid phase content, the printed slurry has excellent shape retention ability, and the ceramic blank prepared by calcination is porous and not easy to crack. The porosity is regulated and controlled according to the ratio of the organic solvent to the ceramic powder, a hierarchical pore structure is realized, and ceramic parts with complex geometrical shapes can be prepared.

Description

technical field [0001] The invention relates to the technical field of ceramic 3D printing, in particular to a method for preparing 3D printed ceramics and its products. Background technique [0002] As a traditional inorganic non-metallic material, ceramics have excellent properties such as high strength, corrosion resistance, wear resistance and high temperature resistance, and have received extensive attention and applications in various industries such as biomedicine, electronics, and aerospace. [0003] Additive Manufacturing (AM), commonly known as 3D printing, is a new and advanced material forming technology that is relatively popular at present. Many domestic and foreign research institutions and enterprises have participated in the research and development and innovation of this technology. Ceramic 3D printing technology, as a combination of ceramic materials and 3D printing technology, makes it possible to manufacture ceramic products with complex shapes, and has ...

Claims

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Application Information

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IPC IPC(8): C04B35/46C04B35/48C04B35/10C04B35/565C04B35/622C04B35/638C04B35/634B33Y70/10B33Y10/00
CPCB33Y10/00B33Y70/10C04B35/10C04B35/46C04B35/48C04B35/565C04B35/622C04B35/63416C04B35/63488C04B35/638C04B2235/606C04B2235/6562C04B2235/96
Inventor 段帅帅罗丽荣田晓聪靳洪允侯书恩
Owner CHINA UNIV OF GEOSCIENCES (WUHAN)
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