RT Journal Article A1 Wen ZHENG,Jia-Min WU,Shuang CHEN,Chang-Shun WANG,Chun-Lei LIU,Shuai-Bin HUA,Kang-Bo YU,Jie ZHANG,Jing-Xian ZHANG,Yu-Sheng SHI; AD State Key Laboratory of Materials Processing and Die & Mould Technology, School of Materials Science and Engineering, 中国 ; State Key Laboratory of Materials Processing and Die & Mould Technology, School of Materials Science and Engineering, 中国 ; State Key Laboratory of Materials Processing and Die & Mould Technology, School of Materials Science and Engineering, 中国 ; State Key Laboratory of Materials Processing and Die & Mould Technology, School of Materials Science and Engineering, 中国 ; State Key Laboratory of Materials Processing and Die & Mould Technology, School of Materials Science and Engineering, 中国 ; State Key Laboratory of Materials Processing and Die & Mould Technology, School of Materials Science and Engineering, 中国 ; State Key Laboratory of Materials Processing and Die & Mould Technology, School of Materials Science and Engineering, 中国 ; State Key Laboratory of Materials Processing and Die & Mould Technology, School of Materials Science and Engineering, 中国 ; State Key Laboratory of High Performance Ceramics and Superfine Microstructure, Shanghai Institute of Ceramics, 中国 ; State Key Laboratory of Materials Processing and Die & Mould Technology, School of Materials Science and Engineering, 中国 T1 Influence of Al2O3 content on mechanical properties of silica-based ceramic cores prepared by stereolithography YR 2021 IS 6 vo 10 OP 1381-OP 1388 K1 mechanical properties;Al2O3;silica;stereolithography;ceramic core;hollow blades AB Silica ceramic cores have played an important part in the manufacture of hollow blades due to their excellent chemical stability and moderate high-temperature mechanical properties. In this study, silica-based ceramics were prepared with Al2O3 addition by stereolithography, and the influence of Al2O3 content on mechanical properties of the silica-based ceramics was investigated. The Al2O3 in silica-based ceramics can improve the mechanical properties by playing a role as a seed for the crystallization of fused silica into cristobalite. As a result, with the increase of Al2O3 content, the linear shrinkage of the silica-based ceramics first decreased and then increased, while the room-temperature flexural strength and the high-temperature flexural strength first increased and then decreased. As the Al2O3 content increased to 1.0 vol%, the linear shrinkage was reduced to 1.64% because of the blocked viscous flow caused by Al2O3. Meanwhile, the room-temperature flexural strength and the high-temperature flexural strength were improved to 20.38 and 21.43 MPa with 1.0 vol% Al2O3, respectively, due to the increased α-cristobalite and β-cristobalite content. Therefore, using the optimal content of Al2O3 in silica-based ceramics can provide excellent mechanical properties, which are suitable for the application of ceramic cores in the manufacturing of hollow blades. SN 2226-4108 LA EN