| 초록 |
Yttria-stabilized zirconia(YSZ) has been widely used as a dental restorative material due to its excellent mechanical properties. However, YSZ, which is mainly used as a dental material, is optically opaque and has low temperature degradation(LTD). Recently, as interest in aesthetics increases, translucency similar to real teeth is being emphasized. As a result, there is an increasing demand for full-contour zirconia which improves translucency by introducing a higher content of cubic phase despite the deterioration of mechanical properties. In this study, we investigated optically transparent 8YSZ which is stabilized with cubic phase. Since it is necessary to complete densification for the transparency, Al2O3 is doped to improve the sinterability of 8YSZ and two step sintering was applied in order to compensate mechanical properties by inhibiting grain growth. And the consequent phase change, optical properties, mechanical properties and LTD were studied. |
