Influence of Al2O3 content on mechanical properties of silica-based ceramic cores prepared by stereolithography

Abstract 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 Al 2 O 3 addition by stereolithography, influence content on properties was investigated. The can improve playing a role as seed for crystallization fused silica into cristobalite. As result, increase content, linear shrinkage first decreased then increased, while room-temperature flexural strength increased decreased. 1.0 vol%, reduced 1.64% because blocked viscous flow caused . Meanwhile, improved 20.38 21.43 MPa vol% , respectively, ?-cristobalite ?-cristobalite content. Therefore, using optimal provide properties, which are suitable application manufacturing blades.