2种纳米粉体对牙科ZrO_2陶瓷掺杂增强效果的比较  

Comparison of the enhancement effect of two different nanopowders doping on dental ZrO_2 ceramics

作　　者：许力强[1] 宋文植[2] 孙宏晨[3] 

机构地区：[1]深圳市人民医院口腔中心,深圳518020 [2]吉林大学中日联合医院口腔系,长春130031 [3]吉林大学口腔医院,长春130021

出　　处：《口腔材料器械杂志》2014年第3期141-146,共6页Chinese Journal of Dental Materials and Devices

摘　　要：目的观察不同纳米粉体填充到微米尺度的ZrO2造粒粉中对陶瓷ZrO2纳米复合材料性能的影响。方法利用超声波-共沉淀法制备纳米α-Al2O3粉体;利用反向沉淀法制备氧化钇稳定的纳米锆粉体;作为第二相,以不同的量(体积百分比,vol%)填充到基质微米ZrO2造粒粉中,高温煅烧后,测试了纳米粉体掺杂ZrO2陶瓷复合材料的弯曲强度、断裂韧性和维氏硬度等力学性能。结果纳米α-Al2O3的最佳填充量为5 vol%,此时ZrO2复相陶瓷的弯曲强度和断裂韧性分别为(659.17±46.54)MPa和(8.55±0.89)MPam1/2;纳米ZrO2的最佳填充量为10 vol%,此时ZrO2复相陶瓷的弯曲强度和断裂韧性分别为(673.17±47.19)MPa和(9.01±0.82)MPam1/2。结论当填充纳米ZrO2和纳米α-Al2O3的量>5 vol%(如10 vol%)时,前者增强效果优于后者;但当填充量≤5 vol%时,后者的增强效果优于前者。Objective To observe the influences of doping different nanopowders into ZrO2 micrometer granulated powder on the properties of ZrO2 nanocomposite ceramic. Methods The α -Al2O3 nanopowders were prepared by the ultrasonic-assisted precipitation method, and the Y2O3 stabilized ZrO2 nanopowders were prepared by the reverse-precipitation method. The different amounts （vol %） of the α -Al2O3 or ZrO2 nanopowders were added to the micrometer-sized ZrO2 matrix, and then sintered at a high temperature. Further, the nanopowders doped ZrO2 ceramic were characterized by the mechanical properties including flexural strength, fracture toughness and Vickers-hardness. Results There was an optimum amount of doped α -Al2O3 or ZrO2 nanopowders. In the case of α -Al2O3 nanopowder, 5 vol % was the optimum amount. When doped with 5 vol %α -Al2O3 nanopowder, the flexural strength of ZrO2 nanocomposite ceramic was （659.17±46.54） MPa and the fracture toughness was （8.55 ±0.89） MPam^1/2, respectively. In the case of ZrO2 nanopowder, 10 vol % was the optimum amount. When doped with 10 vol% Zr02 nanopowder, the flexural strength of ZrO2 nanocomposite ceramic was （673.17±47.19） MPa and the fracture toughness was （9.0±0.82） MPam^1/2, respectively. When the doped amount was less or equal to 5 vol%, the enhancement effect of α -Al2O3 nanopowder doping was better than that of ZrO2 nanopowders doping. Conelusion When the doped amount of ZrO2 nanopowder or α -Al2O3 nanopowder was greater than 5 vol%, the enhancement effect of the former was better than that of the latter. However, when the doped amount of ZrO2 or α -Al2O3 nanopowder was less than or equal to 5 vol%, the enhancement effect of the latter was better than that of the former.

关 键 词：微米ZrO2 纳米Α-AL2O3 纳米ZRO2 ZrO2复相陶瓷 力学性能 

分 类 号：R783.1[医药卫生—口腔医学]