氢气气氛下两步法无压烧结制备Al2O3半透明陶瓷
Translucent Alumina Ceranmic Prepared by Two-Step Pressureless Sintering in a Hydrogen Gas Atmosphere
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摘要: 在氢气气氛下, 尝试采用两步法无压烧结技术制备了致密且晶粒尺寸较小的Al2O3半透明陶瓷。结果表明: 第一步烧结温度T1和第二部烧结温度T2的范围分别为1 650~1 750 ℃和1 600~1 650 ℃; 在T1, T2分别为1 750, 1 650 ℃烧结试样的力学性能较一步烧结的有了大幅提高, 其光学性能达到了灯管的要求。Abstract: The translucent alumina ceramic with high density and fine grain size was fabricated by a two-step pressureless sintering process in a hydrogenolysis gas atmosphere. The results show that the first-step sintering temperature(T1) was 1 650-1 750 ℃ and the second-step sintering temperature(T2) was 1 600-1 650 ℃. The mechanical properties of the sample prepared by two-step pressureless sintering (T1=1 750 ℃, T2=1 650 ℃) were far more improvement than that of the sample prepared by one-step sintering, and its opitical properties met the general requirements of the lamp.