A conformal drying method for 3D printing direct-writing shaped ceramic bodies

Abstract

A shape-conserving drying method for 3D printing direct-writing formed ceramic bodies. First, 3D print ceramic blanks on a printing base plate with a layer of hydrophobic film, and then put the ceramic blanks and printing base plate into constant temperature and humidity. Drying is carried out in the environment, and the drying temperature and humidity are set according to the warpage relationship fitted by MATLAB. hour; separate the ceramic blank from the hydrophobic film, and continue to dry the ceramic blank at a constant temperature and humidity for 12 to 15 hours; then select the constant temperature as 25°C and the relative humidity as 40%, and continue drying for 3 hours; The ceramic blank after constant temperature and humidity drying is placed in an oven, the temperature is set at 100°C, and dried for 10 to 20 minutes; the invention can realize the controllable deformation and micro deformation of 3D printed ceramics, and greatly improve the mechanical properties of 3D printed ceramics and specific surface area.

Description

technical field [0001] The invention belongs to the technical field of ceramic preparation, and in particular relates to a shape-conserving drying method for 3D printing direct-writing formed ceramic blanks. Background technique [0002] Porous ceramics have the advantages of large specific surface area, high adsorption capacity, and stable chemical properties. They can be widely used in ion exchange, adsorption, filtration and separation, catalysts, sensors, and lightweight design. 3D printing technology allows the precise manufacture of ceramic devices with complex structures and optimized properties, and simplification, personalized manufacturing, and low production costs are the significant advantages of this method. Direct writing technology (DIW) is a kind of 3D printing technology. The water-based ceramic slurry used in DIW printing has a wide range of applications, but the ceramic parts printed by DIW are prone to cracks and deformation during post-processing, and it...

AI Technical Summary

Problems solved by technology

Direct writing technology (DIW) is a kind of 3D printing technology. The water-based ceramic slurry used in DIW printing has a wide range of applications, but the ceramic parts printed by DIW are prone to cracks and deformation during post-processing, and it is difficult to pass Therefore, the post-processing technology of DIW printed ceramics is an important difficulty in the preparation process, which directly affects the final performance of DIW printed ceramic parts.

[0003] At present, there are many drying methods for ceramic biscuits prepared by traditional techniques, including freeze-drying, multi-step drying, natural drying, etc. After a large number of experiments on 3D printed ceramic parts, it was found that although freeze-drying can reduce deformation, the dried The strength of ceramic parts is too low, the freeze-drying process is complicated and the cost is high; multi-step drying has high requirements for drying equipment, the process is complicated and the cost is high; the ceramic green body after natural drying method is warped and deformed, and the cracking is serious, which seriously affects the product Dimension accuracy and yield

[0004] The Chinese patent (Application No. 200710103657.0, titled: a drying method for a long rod-shaped ceramic body) is only applicable to the drying of a long rod-shaped ceramic body, and the rod-shaped ceramics need to be bundled, the process is complicated and the output is low

In the Chinese patent (Application No. 201910497733.3, titled: Micro-deformation rapid drying method for ceramic green body), the drying process of ceramic green body is complicated.

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