Effect of Fe2O3 Addition and Sintering Temperature on mechanical Properties and Translucence of Zirconia Dental Ceramics with Different Y2O3 Content

The influence of Fe2O3 additions on the microstructure, mechanical properties and translucence zirconia with 3 mol-% or 5 Y2O3 was evaluated. Samples were pressed different thickness sintered at 1475, 1500, 1550 1600°C for 2 h. Density, phases, roughness, strength translucency analyzed. All samples showed densification greater than 99%. After sintering 1600°C, phase analysis revealed only tetragonal ZrO2 in 3% Y2O3, while 5% cubic identified. Significant increase grain size noted, when increasing content from to 0.8 µm 2.3 1600°C. affected no relevant density, microstructure properties. Visible reflectance spectroscopy analyses, related CIELab scale, indicate variation contrast ratio as function coloring agent content.