Compared with the preparation process of blade turbine using precision investment casting (PIC), additive manufacturing technology, especially binder jetting additive manufacturing (BJAM), possess many advantages such as the decreased cost, simplified process, easily preparation of complex porous materials, and diversified selectivity of binder types, therefore, it has been widely used to fabricate the core parts. Al2O3 ceramic owns better oxidation and corrosion resistance, highly serviced temperature and high hardness, is widely used as the core materials. However, the solid sintering method is hard to meet the mechanical requirement of Al2O3 ceramic cores. Therefore, a solid-liquid sintering additives, such as CuO and TiO2, was added to assist the sintering of Al2O3 ceramic. In this work, influence of sintering additives contents ranged from 0 to 10% (mass fraction) and layer thickness ranged from 60–100 μm on the porosity, microstructure, and mechanical properties of Al2O3 ceramic cores were investigated. the results could construct a theoretical foundation for the rapid and low-cost printing of high-performance ceramic cores,and further expand the application scope of Al2O3 ceramics.