着色剂对口腔修复用钇稳定氧化锆 陶瓷粉体制备的影响

目的 探讨着色剂氧化铁（Fe2O3）、氧化铈（CeO2）对口腔修复用钇稳定氧化锆陶瓷（Y-TZP）制备粉体的影响。方法 按照一定比例将口腔修复用Y-TZP粉体和着色剂（Fe2O3 0.15%或CeO2 4%）分别混合，配置成具有一定固含量的Y-TZP喷雾干燥浆料。通过喷雾造粒的方法进行着色和未着色Y-TZP粉体造粒。粉体分成3组，分别为未着色Y-TZP组、0.15%Fe2O3着色Y-TZP组、4%CeO2着色Y-TZP组，分别利用激光粒度分析仪和光学显微镜进行3组粉体粒径和形貌的测量和分析。结果 3组口腔修复用Y-TZP造粒粉体的颗粒D50总体均数差异有统计学意义（P<0.05）。均数两两比较时，0.15%Fe2O3着色Y-TZP粉体D50与未着色Y-TZP粉体、4%CeO2着色Y-TZP粉体D50均数差异有统计学意义（P<0.05）；未着色Y-TZP粉体与4%CeO2着色Y-TZP粉体D50均数差异无统计学意义（P>0.05）。Fe2O3、CeO2作为Y-TZP的内着色剂，粉体大多成球形。结论 CeO2作为口腔修复用Y-TZP的着色剂，对造粒粉料的粒径分布以及成球性能影响不大；Fe2O3作为着色剂进行内着色对颗粒的粒径产生一定的影响。

Effects of colorants on yttria stabilized tetragonal zirconia polycrystals powder

Objective To evaluate the effect of Fe2O3 and CeO2 as colorants on yttria stabilized tetragonal zirconia polycrystals (Y-TZP) powder. Methods The spray granulation slurry of colored zirconia was prepared with different concentrations of Fe2O3 (0.15%) and CeO2 (4%), which were added in Y-TZP. Zirconia powder was made by spray granulation. The powder specimens were divided into three groups: uncolored zirconia, Fe2O3 (0.15%) zirconia, and CeO2 (4%) zirconia. The particle morphologies of the powder specimens were measured with a laser particle size analyzer and an optical microscope. Results The differences in D50 among the three groups were statistically significant (P<0.05). Group Fe2O3 showed a significant difference from groups CeO2 and uncolored zirconia (P<0.05). Group uncolored zirconia showed no significant difference from group CeO2 (P>0.05). Mostly spherical powder was observed in the three groups. Conclusion Fe2O3 as a colorant can affect particles, whereas CeO2 has no effect.