Refractive index calculation using the structural properties of La4Ti9O24 glass
Refractive index calculation using the structural properties of La4Ti9O24 glass
复制标题
DOI：
10.1063/1.2903544
复制
发表时间：
2008-05-01
影响因子：
3.2
通讯作者：
Yu, Jianding
中科院分区：
文献类型：
--
作者：
Arai, Yasutomo;Itoh, Keiji;Yu, Jianding
利用空气动力悬浮炉制备了无色透明球形La4Ti9O24玻璃，在1313nm处获得了2.231+/-0.001的高折射率。基于Lines理论，我们还研究了高折射率的起源。理论计算所需的物理参数是由中子和同步辐射X射线衍射测量得出的平均最近邻的Ti-O和La-O距离，以及玻璃中的TiO2LaO1.5的偏摩尔体积。计算得到的二氧化钛和氧化镧的磁化率之和得到的La4Ti9O24玻璃的折射率为2.244。这与玻璃的实验折射率非常接近。此外，理论计算结果表明，玻璃中氧的5倍Ti(TiO5)团簇比6倍的Ti(TiO6)团簇产生更大的磁化率。(C)2008年美国物理研究所。
A high refractive index of 2.231 +/- 0.001 at 1313 nm is achieved in a colorless, transparent spherical La4Ti9O24 glass that was prepared by using an aerodynamic levitation furnace. We also investigate the origin of the high refractive index based on the Lines theory. The physical parameters necessary for the theoretical calculations are the averaged nearest-neighbor Ti-O and La-O distances that are deduced by neutron and synchrotron x-ray diffraction measurement and the partial molar volumes of TiO2 and LaO1.5 in the glass. The sum of the calculated TiO2 and LaO1.5 susceptibilities provides a La4Ti9O24 glass refractive index of 2.244. This is very close to the experimental refractive index of the glass. In addition, the theoretical calculation results suggest that the oxygen fivefold Ti (TiO5) cluster produces greater susceptibilities than the sixfold Ti (TiO6) cluster in the glass. (C) 2008 American Institute of Physics.