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Thermal Treatment of gamma-Al2O3 for the Preparation of Stereolithography 3D Printing Ceramic Slurries
Li, He; Liu, Yongsheng; Liu, Yansong; Zeng, Qingfeng; Liang, Jingjing
2019-11-19
Source PublicationFRONTIERS IN MATERIALS
ISSN2296-8016
Volume6
AbstractAlumina (Al2O3) suspensions were prepared for the effective application in the stereolithography three-dimensional (3D) printing process. Thermal treatment of gamma-Al2O3 could optimize the ceramic slurries to meet the requirements of stereolithography 3D printing technique. In this study, alumina powders were modified by thermal treatment at different temperatures for the preparation of well-dispersed ceramic slurries. The influence of thermal treatment on the raw powder, printed green bodies, and sintered alumina parts was systematically studied. Thermogravimetric analysis indicated that the decomposition temperature of photosensitive resin was between 390 and 460 degrees C. The alumina powders became denser, the crystal grains changed from round sphere-shaped to long cylinder-shaped, and the pores disappeared with increasing thermal treatment temperature. After the 3D printing process, the microstructure of green bodies and sintered alumina ceramics exhibited significant variation. Decomposition and removal of photosensitive resin led to higher water absorption, higher porosity, and lower bulk density of alumina ceramics compared to the printed green bodies. The scattering phenomenon in ceramic slurries and layer-by-layer forming characteristic determined the different shrinkage in three directions. Experimental results suggested that 1,500 degrees C was considered as the optimal thermal treatment temperature, with the water absorption of 107%, open porosity of 91%, and bulk density of 0.67 g cm(-3). The higher thermal treatment temperatures would lead to clump and agglomerate of alumina powders.
Keywordstereolithography alumina temperature shrinkage three-dimensional
Indexed BySCI
Language英语
WOS IDWOS:000501280500001
PublisherFRONTIERS MEDIA SA
Citation statistics
Document Type期刊论文
Identifierhttp://ir.imr.ac.cn/handle/321006/80618
Collection中国科学院金属研究所
Recommended Citation
GB/T 7714
Li, He,Liu, Yongsheng,Liu, Yansong,et al. Thermal Treatment of gamma-Al2O3 for the Preparation of Stereolithography 3D Printing Ceramic Slurries[J]. FRONTIERS IN MATERIALS,2019,6.
APA Li, He,Liu, Yongsheng,Liu, Yansong,Zeng, Qingfeng,&Liang, Jingjing.(2019).Thermal Treatment of gamma-Al2O3 for the Preparation of Stereolithography 3D Printing Ceramic Slurries.FRONTIERS IN MATERIALS,6.
MLA Li, He,et al."Thermal Treatment of gamma-Al2O3 for the Preparation of Stereolithography 3D Printing Ceramic Slurries".FRONTIERS IN MATERIALS 6(2019).
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