Cosolvent assisting degreasing method of light-cured 3D printed aluminum oxide ceramic biscuits

A technology of alumina ceramics and 3D printing, applied in the field of additive manufacturing, can solve problems such as insufficient research, achieve the effects of reducing degreasing time, shortening degreasing time, improving degreasing efficiency and production efficiency

Inactive Publication Date: 2019-09-27
NORTHWESTERN POLYTECHNICAL UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Using solvent-assisted degreasing can improve the degreasing efficiency and degreasing quality. However, the research on solvent degreasing is not enough. It is very important to adjust the solvent type, concentration, temperature and immersion time when impregnating the green body.

Method used

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  • Cosolvent assisting degreasing method of light-cured 3D printed aluminum oxide ceramic biscuits
  • Cosolvent assisting degreasing method of light-cured 3D printed aluminum oxide ceramic biscuits

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0032] Step 1: Submerge the light-cured 3D printed alumina ceramic green body in an ethyl acetate solution with a mass percentage of 40%, and soak for 12 hours at 25°C.

[0033] Step 2: Transfer the impregnated alumina ceramic green body to a watch glass with a flat bottom, wipe off the solution on its surface with a dust-free paper, and let it dry naturally.

[0034] Step 3: Transfer the naturally dried alumina ceramic green body to a muffle furnace, raise the temperature to 500° C. at a rate of 3° C. / min under air atmosphere, and keep it warm for 2 hours. That is, the cosolvent-assisted degreasing process of the photocured 3D printed alumina biscuit is completed. Samples after degreasing figure 2 shown.

Embodiment 2

[0036] Step 1: Submerge the light-cured 3D printed alumina ceramic green body in an ethyl acetate solution with a mass percent content of 10%, and soak for 12 hours at 20°C.

[0037] Step 2: Transfer the impregnated alumina ceramic green body to a watch glass with a flat bottom, wipe off the solution on its surface with a dust-free paper, and let it dry naturally.

[0038] Step 3: transfer the naturally dried alumina ceramic green body to a muffle furnace, and raise the temperature to between 400° C. at a rate of 5° C. / min under air atmosphere conditions, and keep the temperature for 2 hours. That is, the cosolvent-assisted degreasing process of the photocured 3D printed alumina biscuit is completed. Samples after degreasing figure 2 shown.

Embodiment 3

[0040] Step 1: immerse the light-cured 3D printed alumina ceramic green body in an ethyl acetate solution with a mass percentage of 70%, and soak for 5 hours at 50°C.

[0041] Step 2: Transfer the impregnated alumina ceramic green body to a watch glass with a flat bottom, wipe off the solution on its surface with a dust-free paper, and let it dry naturally.

[0042] Step 3: transfer the naturally dried alumina ceramic green body to a muffle furnace, and raise the temperature to 500° C. at a rate of 8° C. / min under air atmosphere conditions, and keep it warm for 5 hours. That is, the cosolvent-assisted degreasing process of the photocured 3D printed alumina biscuit is completed. Samples after degreasing figure 2 shown.

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Abstract

The invention relates to a cosolvent assisting degreasing method of light-cured 3D printed aluminum oxide ceramic biscuits. The cosolvent assisting degreasing method of light-cured 3D printed aluminum oxide ceramic biscuits comprises following steps: 1, aluminum oxide ceramic biscuits are immersed in a degreasing solution; 2, after immersion, the aluminum oxide ceramic biscuits are introduced into watch glasses with flat bottoms, the surface solution is removed using dust-free paper, and natural air drying is carried out; 3, after natural air drying, the aluminum oxide ceramic biscuits are introduced into a muffle furnace, are heated to 350 to 650 DEG C at a heating rate of 0.1 to 8 DEG C/min in air atmosphere, and then thermal insulation treatment is carried out for 0.5 to 5h. According to the method, cosolvent assisting degreasing is adopted, so that aluminum oxide ceramic biscuit degreasing time is shortened, aluminum oxide ceramic biscuit internal stress generated in heating process is reduced, the product structure after degreasing is more uniform, no surface crack is caused, and no deformation is caused. The cosolvent assisting degreasing method of light-cured 3D printed aluminum oxide ceramic biscuits is capable of shortening degreasing time, increasing degreasing efficiency and production efficiency, and can be used in the field of aluminum oxide ceramic production.

Description

technical field [0001] The invention belongs to the technical field of additive manufacturing, and relates to a solvent-assisted degreasing method for photocuring 3D printed alumina ceramic blanks. Background technique [0002] Alumina ceramics have excellent properties such as good conductivity, high mechanical strength and good high temperature resistance, and are the most widely used ceramics in modern society. However, due to its difficulty in processing and other reasons, its application in the field of precision and complex structural parts is limited. Michelle L.Griffith first proposed the possibility of producing ceramic parts by photocuring 3D printing technology in 1995 (Griffith M L, Halloran J W. Freeform fabrication of ceramics viastereolithography[J]. Journal of the American Ceramic Society, 1996, 79( 10): 2601-2608.). Due to the characteristics of high production efficiency and short production cycle, light-curing 3D printing technology is suitable for the f...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C04B35/638C04B35/10
CPCC04B35/10C04B35/638C04B2235/6562C04B2235/6567
Inventor 刘永胜李鹤王晶曾庆丰刘岩松
Owner NORTHWESTERN POLYTECHNICAL UNIV
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