Several properties of hot-pressing low-temperature firing silica-based core and two general hot-pressing silica-based cores, involving bend strength, hot deformation of core at double-supporting points,collapsibility of potassium hydroxide solution at boiling point 200 ℃, the retained strength of the core under 1600℃ of were tested, and the comparison and analysis of them was made.

The present investigation is focus on the preparation process of silica-based ceramic mold using silica sol as binder.

Al2O3-based ceramic core materials were prepared by sintering in ordinary pressure.