Conformal drying method for 3D printing direct writing forming ceramic body

Abstract

A conformal drying method for a 3D printing direct writing forming ceramic body is disclosed and comprises the steps that a ceramic primary blank is printed on a printing bottom plate flatly laid witha layer of hydrophobic film in a 3D mode, then the ceramic primary blank and the printing bottom plate are placed in a constant-temperature and constant-humidity environment together to be dried for6h, wherein the drying temperature and humidity are set according to a warping degree relational expression fitted by MATLAB, solid phase content is 18 to 22.29 percent, the constant temperature is 25-35 DEG C, and the relative humidity is 40-93%, the initial ceramic blank is separated from the hydrophobic film and is continuously dried at constant temperature and humidity for 12-15 hours, then the constant temperature is selected to be 25 DEG C, the relative humidity is selected to be 40%, drying is continued for 3 hours, the ceramic primary blank subjected to constant-temperature and constant-humidity drying is put into a drying oven, the temperature is set to be 100 DEG C and the blank is dried for 10-20 minutes, so that controllable deformation and micro-deformation of the 3D printingceramic can be achieved, and the mechanical property and the specific surface area of the 3D printing ceramic are greatly improved.

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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