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Method for preparing boron carbide porous ceramic based on photocuring 3D printing process
The invention belongs to the technical field of preparation of boron carbide porous ceramics, and particularly relates to a method for preparing boron carbide porous ceramics based on a photocuring 3D printing process, the boron carbide porous ceramics are prepared by utilizing the photocuring 3D printing process and high-temperature carbon thermal reduction, in the preparation process, on one hand, added boric acid is decomposed into B2O3 in the vacuum glue discharging process, and on the other hand, the boron carbide porous ceramics are decomposed into B2O3; the effect of a sintering aid is further achieved in the pressureless sintering process, sintering of a boron carbide ceramic body is effectively promoted, and therefore the boron carbide porous ceramic is endowed with the excellent mechanical property; on the other hand, the added polymer dispersing agent and pore-forming agent are decomposed and carbonized in the vacuum glue discharging process to form holes; furthermore, the pore structure of the boron carbide porous ceramic can be regulated and controlled by a control process, so that the ultralightness of the boron carbide porous ceramic is realized. Besides, the formed carbon element can be used as a reducing agent to reduce boron oxide into B4C at a sintering high temperature, so that the purity of the boron carbide porous ceramic is improved.
本发明属于碳化硼多孔陶瓷制备技术领域，具体涉及基于光固化3D打印工艺制备碳化硼多孔陶瓷的方法，利用光固化3D打印工艺和高温碳热还原制备碳化硼多孔陶瓷，在制备过程中，一方面，所添加的硼酸在真空排胶过程中分解为B2O3，进一步在无压烧结过程中起到烧结助剂的作用，有效促进碳化硼陶瓷坯体的烧结，从而赋予碳化硼多孔陶瓷优异的力学性能；另一方面，所添加的聚合物类分散剂及造孔剂在真空排胶过程中分解、碳化，形成孔洞；进而可通过控制工艺调控碳化硼多孔陶瓷的孔结构，实现碳化硼多孔陶瓷的超轻化。此外，所形成的碳元素可作为还原剂，在烧结高温下将氧化硼还原成B4C，以利于提高碳化硼多孔陶瓷的纯度。
Method for preparing boron carbide porous ceramic based on photocuring 3D printing process
The invention belongs to the technical field of preparation of boron carbide porous ceramics, and particularly relates to a method for preparing boron carbide porous ceramics based on a photocuring 3D printing process, the boron carbide porous ceramics are prepared by utilizing the photocuring 3D printing process and high-temperature carbon thermal reduction, in the preparation process, on one hand, added boric acid is decomposed into B2O3 in the vacuum glue discharging process, and on the other hand, the boron carbide porous ceramics are decomposed into B2O3; the effect of a sintering aid is further achieved in the pressureless sintering process, sintering of a boron carbide ceramic body is effectively promoted, and therefore the boron carbide porous ceramic is endowed with the excellent mechanical property; on the other hand, the added polymer dispersing agent and pore-forming agent are decomposed and carbonized in the vacuum glue discharging process to form holes; furthermore, the pore structure of the boron carbide porous ceramic can be regulated and controlled by a control process, so that the ultralightness of the boron carbide porous ceramic is realized. Besides, the formed carbon element can be used as a reducing agent to reduce boron oxide into B4C at a sintering high temperature, so that the purity of the boron carbide porous ceramic is improved.
本发明属于碳化硼多孔陶瓷制备技术领域，具体涉及基于光固化3D打印工艺制备碳化硼多孔陶瓷的方法，利用光固化3D打印工艺和高温碳热还原制备碳化硼多孔陶瓷，在制备过程中，一方面，所添加的硼酸在真空排胶过程中分解为B2O3，进一步在无压烧结过程中起到烧结助剂的作用，有效促进碳化硼陶瓷坯体的烧结，从而赋予碳化硼多孔陶瓷优异的力学性能；另一方面，所添加的聚合物类分散剂及造孔剂在真空排胶过程中分解、碳化，形成孔洞；进而可通过控制工艺调控碳化硼多孔陶瓷的孔结构，实现碳化硼多孔陶瓷的超轻化。此外，所形成的碳元素可作为还原剂，在烧结高温下将氧化硼还原成B4C，以利于提高碳化硼多孔陶瓷的纯度。
Method for preparing boron carbide porous ceramic based on photocuring 3D printing process
基于光固化3D打印工艺制备碳化硼多孔陶瓷的方法
LI XIANGMING (author) / YU WANJUN (author) / LIU JUNTING (author) / LENG HUIWEN (author) / ZHU XIAOTAO (author)
2024-11-29
Patent
Electronic Resource
Chinese
IPC:
C04B
Kalk
,
LIME
/
B33Y
ADDITIVE MANUFACTURING, i.e. MANUFACTURING OF THREE-DIMENSIONAL [3D] OBJECTS BY ADDITIVE DEPOSITION, ADDITIVE AGGLOMERATION OR ADDITIVE LAYERING, e.g. BY 3D PRINTING, STEREOLITHOGRAPHY OR SELECTIVE LASER SINTERING
,
Additive (generative) Fertigung, d. h. die Herstellung von dreidimensionalen [3D] Bauteilen durch additive Abscheidung, additive Agglomeration oder additive Schichtung, z. B. durch 3D- Drucken, Stereolithografie oder selektives Lasersintern
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