Higher refractive index and lower wavelength dispersion of SiO2 glass by structural ordering evolution via densification at a higher temperature
Higher refractive index and lower wavelength dispersion of SiO2 glass by structural ordering evolution via densification at a higher temperature
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通过在较高温度下致密化进行结构有序演化，SiO2 玻璃具有更高的折射率和更低的波长色散
DOI：
10.1039/c5ra25106k
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发表时间：
2016
期刊：
影响因子：
3.9
通讯作者：
H. Inoue
中科院分区：
文献类型：
--
作者：
A. Masuno;N. Nishiyama;F. Sato;N. Kitamura;T. Taniguchi;H. Inoue
在7.7GPa的高压和高温下制备了大尺寸致密化二氧化硅玻璃。随着合成温度从室温增加到1200 °C，致密化增加到23%。在可见光区的折射率的波长色散表明，不仅折射率，而且阿贝数上升的结晶二氧化硅的合成温度升高。在真空紫外区的反射光谱显示，玻璃致密化在较高的温度下进行均匀的演变，其结构有序的中间范围。结果表明，玻璃结构随机性的降低导致折射率和阿贝数的增加。玻璃在较高温度下的致密化控制了相同方向上的折射率和阿贝数等竞争性质，是提取材料潜力的一种有前途的方法。
Large-sized densified silica glasses were fabricated at a high pressure of 7.7 GPa and high temperatures. As the synthesis temperature was increased from room temperature to 1200 °C, the densification increased to 23%. The wavelength dispersion of the refractive index in the visible region showed that not only the refractive index but also the Abbe number rose as high as those of crystalline silica as the synthesis temperature increased. The reflectance spectra in the vacuum ultraviolet region revealed that glasses densified at a higher temperature underwent homogeneous evolution of their structural ordering in an intermediate range. It was suggested that the decrease in randomness of the glass structure resulted in the increase in the refractive index and the Abbe number. The densification of glass at higher temperatures, which controls competing properties such as the refractive index and the Abbe number in the same direction, is a promising way to extract the latent potential of materials.