大壁厚3D打印SiO2陶瓷快速制备技术研究

选用复合分散剂制备低粘度陶瓷料浆,采用自主研发的陶瓷3D打印机,以DLP(digital light processing)工艺制备出了大壁厚(>3 mm)SiO2空心内六角陶瓷部件,坯体精度均在50μm内.分析了3D打印陶瓷素坯在空气气氛和氩气气氛下的热分解过程,研究了气氛对大壁厚(>3 mm)SiO2陶瓷部件脱脂与...

Rapid Preparation of Thick-Walled 3D Printing Silica Ceramics

A composite dispersant was selected to prepare low-viscosity ceramic slurry, and the thick-walled (>3 mm) SiO₂ hollow hexagonal ceramic part was prepared by the self-developed ceramic 3D printer and DLP (digital light processing) process. The accuracy of the green body was all within 50 μm in three dimensional directions. The thermal decomposition process of 3D printing ceramic green bodies in air atmosphere or argon atmosphere was analyzed, and the influence of atmosphere on the degreasing and sintering of thick-walled (>3 mm) SiO₂ ceramic parts was analyzed. The process of rapid degreasing and sintering of thick-walled (>3 mm) 3D printing SiO₂ ceramic body was analyzed by SEM. The argon atmosphere is conducive to the rapid degreasing and sintering of the thick-walled SiO₂ ceramics. The thick-walled (>3 mm) SiO₂ ceramic part was prepared rapidly by controlling the gas flow in argon atmosphere. The period of degreasing and sintering is greatly shortened to 21.8 h. Compared with the preparation period of the slurry and its process imported from a foreign company (The preparation period of the company’s slurry and process to prepare the same product is 283 h), it is shortened by 92.3%. And it is more than 82% shorter than the preparation period of the SiO₂ ceramic hollow blade prepared by the same process in public reports, which reflects the advantages of 3D printing formless rapid prototyping technology, and has great significance for the practical application of SiO₂ ceramic 3D printing technology.