氢气气氛下两步法无压烧结制备Al_2O_3半透明陶瓷  

Translucent Alumina Ceranmic Prepared by Two-Step Pressureless Sintering in a Hydrogen Gas Atmosphere

作　　者：朱渊[1] 张晓娟[1,2] 刘桂武[1] 乔冠军[1] 

机构地区：[1]西安交通大学金属材料强度国家重点实验室,西安710049 [2]西安工程大学理学院,西安710048

出　　处：《机械工程材料》2013年第1期68-70,76,共4页Materials For Mechanical Engineering

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。The translucent alumina ceramic with high density and fine grain size was fabricated by a two-step pressureless sintering process in a bydrogenolysis 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.

关 键 词：Al2O3半透明陶瓷 两步法无压烧结 力学性能 

分 类 号：TB303[一般工业技术—材料科学与工程] TQ174.75[化学工程—陶瓷工业]