Effects of LiF on the microstructure and optical properties of hot-pressed MgAl2O4 ceramics
Effects of LiF on the microstructure and optical properties of hot-pressed MgAl2O4 ceramics
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DOI：
10.1016/j.ceramint.2017.02.110
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发表时间：
2017-06
影响因子：
5.2
通讯作者：
W. Luo;R. Xie;M. Ivanov;Yu-bai Pan;H. Kou;Jiangxu Li
中科院分区：
文献类型：
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作者：
W. Luo;R. Xie;M. Ivanov;Yu-bai Pan;H. Kou;Jiangxu Li
以LiF为助烧剂，采用热压法制备了镁铝尖晶石(α-Al_2O_3)陶瓷。系统研究了LiF添加剂对MgAl2O4陶瓷致密化、显微结构和光学性能的影响。结果表明，LiF的加入能有效地消除陶瓷的气孔，提高陶瓷的光学透明性。对于添加1wt%LiF的尖晶石陶瓷，在1550℃下热压3h，平均晶粒度约为36um，在800 nm处的在线透过率超过60%。
Transparent magnesium aluminate spinel (MgAl2O4) ceramics were fabricated by hot-pressing of the MgO and α-Al2O3powder mixture using LiF as a sintering aid. Effects of the LiF additive on densification, microstructure and optical properties of MgAl2O4ceramics were systematically investigated. It has been found that the addition of LiF can effectively remove the porosity and increase the optical transparency of MgAl2O4ceramics. For the spinel ceramics HP-ed at 1550 °C for 3 h with 1 wt% LiF addition, the average grain size is about 36 µm and the in-line transmittance exceeds 60% at the wavelength of 800 nm.