[摘要] 目的：对纳米氧化锆TZ-3Y-E粉体的烧结及力学性能进行实验分析。方法：TZ-3Y-E粉体200 MPa等静压成型，于不同温度下烧结，测试烧结体密度并检测其线性收缩，弯曲强度和断裂韧性。结果：随着温度的升高，纳米氧化锆的烧结密度和线性收缩呈上升的趋势，在1 300 ℃时体积密度达到6.09 g/cm3，最大线性收缩率为21.41%。1 400 ℃时的机械性能最好，三点弯曲强度和断裂韧性分别为(1 536.37±85.49) MPa， (5.07±1.34) MPa·m1/2。结论：TZ-3Y-E粉体能在低温下烧结，力学性能优良，能够满足口腔全瓷修复材料的要求。

    [关键词] 氧化锆 烧结密度 线性收缩 机械性能

    Study on Sintering Property and Mechanical Property of Nano-powder TZ-3Y-E as Dental Materials.

    HUANG Hui, ZHANG Fu-qiang, SUN Lei, et al.

    Department of Prosthodontics, School of Stomatology, Ninth People’s Hospital, Shanghai Second Medical University, Shanghai 200011

    [Abstract]Objective: To study the sintering and mechanical properties of nano-powder TZ-3Y-E. Methods: TZ-3Y-E powder was isopressed at 200MPa and sintered at different temperatures. Then it was measured on sintered density, linear shrinkage, flexural strength and fracture toughness. Results: The result of the study indicated that with the rising of temperature, the sintered density and linear shrinkage increased. Sintered density of nano-powder zirconia was 6.09g/cm3 at 1300℃. The maximal linear shrinkage was 21.41%. The flexural strength and fracture toughness reached to the maximum value at 1536.37±85.49MPa and 5.07±1.34 MPa·m1/2 at 1400℃ respectively. Conclusion: TZ-3Y-E powder can acquire good mechanical property when it is sintered at low temperature. It is a promising aesthetic all-ceramic dental material. ......