Optical properties of novel oxyfluoride glasses on the systems of LaF3-LaO3/2-NbO5/2 and LaF3-LaO3/2-NbO5/2-AlO3/2
Optical properties of novel oxyfluoride glasses on the systems of LaF3-LaO3/2-NbO5/2 and LaF3-LaO3/2-NbO5/2-AlO3/2
复制标题
LaF3-LaO3/2-NbO5/2和LaF3-LaO3/2-NbO5/2-AlO3/2体系新型氟玻璃的光学性能
DOI：
10.1111/jace.17795
复制
发表时间：
2021
影响因子：
3.9
通讯作者：
Watanabe Yasuhiro
中科院分区：
文献类型：
--
作者：
Chung Jaeyeop;Inoue Hiroyuki;Yoshimoto Kohei;Masuno Atsunobu;Watanabe Yasuhiro
采用悬浮法制备了xLaF 3-（60 −x）LaO 3/2- 40 NbO 5/2（x= 0，5，10，35）和xLaF 3-（60 −x）LaO 3/2- 30 NbO 5/2- 10AlO 3/2（x= 0，10，20，30）氟氧化物玻璃。通过用氟取代玻璃中的一部分氧，玻璃化转变温度Tg和起始结晶温度Tc均降低。适量的氟使温度差ΔT（=Tc−Tg）最大化，表明玻璃形成能力的改善。玻璃的原子堆积密度约为60%，随着氟含量的增加而逐渐增加。玻璃的吸收边向紫外光谱中的短波长区域和红外光谱中的长区域移动，通过氟取代。此外，在一种氟氧化物玻璃中，实现了从307 nm到9.2 µm的宽透明度。此外，该玻璃表现出优良的上级光学性质，具有2.020的高折射率nd和30.1的低波长色散vd的组合。利用Lorentz-Lorenz色散公式分析了氟取代对光纤色散的影响。
Oxyfluoride glasses ofxLaF3–(60 −x)LaO3/2–40NbO5/2(x= 0, 5, 10, 35) andxLaF3–(60 −x)LaO3/2–30NbO5/2–10AlO3/2(x= 0, 10, 20, 30) were prepared using a levitation technique. Both the glass‐transition temperature,Tg, and onset crystallization temperature,Tc, were lowered by substituting a part of the oxygen with fluorine in the glasses. An appropriate amount of fluorine maximized the difference between the temperatures, ΔT(=Tc−Tg), indicating the improvement in the glass‐forming ability. The atomic packing densities of the glasses were approximately 60%, which gradually increased with the fluorine content. The absorption edge of the glasses shifted toward the shorter wavelength region in the ultraviolet spectra and toward the longer region in the infrared spectra by fluorine substitution. In addition, in one of the oxyfluoride glasses, a wide transparency from 307 nm to 9.2 µm was realized. Furthermore, the glass exhibited superior optical properties, with a combination of a high refractive index,nd, of 2.020 and low wavelength dispersion,vd, of 30.1. The effect of fluorine substitution on thendand itsvdwas analyzed using the Lorentz–Lorenz dispersion formula.