In this study, silica ceramics were fabricated using digital light processing technology. The effects of solid content (60–70 wt%), sintering temperature (1300–1600°C), and sintering additives (Al2O3, Y2O3, ZrO2) on the ceramic properties were investigated, providing optimization strategies for 3D printing of ceramic cores for aircraft turbine blades. After being fired at 1500°C, the 60 wt% solid phase content sample exhibited a uniform structure and the best porosity. The silica-based ceramics with 5 wt.% Al2O3 addition showed the highest flexural strength of 2.60 ± 0.13 MPa.
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