Abstract
The effects of additives on the densification and color quality of TiN ceramics were studied. Some oxides (Al2O3, CaCO3, TiO2, Y2O3, ZrO2) as additives were prechecked by sintering, and we selected TiO2 as an addition. TiN was densified by pressureless sintering at 1550° to 1850°C in N2. Samples with addition of 8wt% TiO2 sintered at 1550°, 1700°, and 1850°C showed the relative densities of 97.7, 99.8, and 99.7%, respectively. The optical reflectivity of polished samples was similar to that of gold. Vicker's hardness of some sintered bodies reached about 16GPa. Therefore, polished sintered bodies can be used for ornament.
