Crystal growth of LiF/LiYF4 eutectic crystals and their luminescent properties
Crystal growth of LiF/LiYF4 eutectic crystals and their luminescent properties
复制标题
LiF/LiYF4共晶晶体的晶体生长及其发光性能
DOI：
10.1016/j.jeurceramsoc.2014.02.029
复制
发表时间：
2014
影响因子：
5.7
通讯作者：
A. Yoshikawa
中科院分区：
文献类型：
--
作者：
K. Nishimoto;Y. Yokota;S. Kurosawa;Y. Fujimoto;N. Kawaguchi;K. Fukuda;A. Yoshikawa
采用微提拉法在不同的生长速率下生长了未掺杂和掺0.5mol%Ce的LiF-LiYF 4共晶晶体。扫描电子显微镜（SEM）分析表明，LiYF 4基体中存在棒状结构的LiF。随着生长速率的增加，棒状相的直径逐渐减小。在α射线激发下，Ce掺杂晶体的辐射发光光谱在325 nm处有一个发射峰，与Ce ~（3+）的5d-4f跃迁有关。阴极射线发光图像中的白色部分被认为是由于Ce 3+离子在LiYF 4相，根据扫描电子显微镜（SEM）图像在同一区域。
Undoped and 0.5 mol% Ce-doped LiF–LiYF4eutectic crystals were grown by the micro-pulling-down method at different growth rates. The SEM images of all the eutectic crystals showed LiF with rod-like structure in the LiYF4matrix. The diameter of the rod phase systematically decreased with the increase of the growth rate. The radioluminescence spectra of cerium doped crystal under alpha-ray excitation showed emission peak at 325 nm related to Ce3+5d-4f transition. The white part in the cathodoluminescence image is considered to be due to Ce3+ion in LiYF4phase, according to the scanning electron microscopy (SEM) image in the same region.