TZ-3Y-E粉体的烧结及力学性能实验分析

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

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。

Objective： To study the sintering and mechanical properties of nano - powder TZ - 3 Y - 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/ cm^3 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·ml/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 - ceram- ic dental material.