Abstract
This thesis investigated pure titanium casting using sintering molds to improve the reactive layer created by phosphate-bonded investment. It was observed that sintering began above l,100℃ temperature. The color of pure titanium crowns appeared close to the metallic color itself, as the burnout temperature increased. On element analysis of the surface layer, the more the burn out temperature increased, the more the depth of the reactive layer decreased. By observing under an electron microscope, a wheat gluten-like component was noted when the temperature rose above l,100℃. Al2TiO5 concerned with the sintering of molds. Therefore, it was suggested that the reactive layer is improved by sintering molds even when using a phosphate-bonded investment with a main component of SiO2.
