Role of Bi and Ga additives in the physical properties and structure of GeSe 4 -GeTe 4 glasses
Role of Bi and Ga additives in the physical properties and structure of GeSe 4 -GeTe 4 glasses
复制标题
Bi和Ga添加剂对GeSe 4 -GeTe 4 玻璃物理性能和结构的影响
DOI：
10.1016/j.matchar.2018.05.030
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发表时间：
2018
影响因子：
4.7
通讯作者：
Golovchak, R.
中科院分区：
文献类型：
--
作者：
Szlęzak, J.;Kelly, J.;Ingram, A.;Shpotyuk, Ya.;Adamiak, S.;Dziedzic, A.;Cebulski, J.;Golovchak, R.
研究了Bi对含Ga混合Ge-Se和Ge-Te玻璃结构和物理性能的影响。将使用高分辨率透射电子显微镜观察到的部分有序纳米级区域与通过中子和 X 射线散射研究确定的第一锐衍射峰参数进行比较。纳米压痕测量显示，Bi 含量为 1 和 5at.% 的玻璃的纳米硬度 (H) 和杨氏模量 (E) 值偏差非常小，而 Bi 含量为 10at.% 的样品则观察到两个具有不同机械性能的区域。 Bi 浓度从 1at.% 增加到 5at.% 导致在整个红外光谱范围内形成约 2mm 厚的玻璃的完全不透明性，而通过 SEM、TEM、XRD 和中子散射方法观察到这两个样品之间没有显着差异。分别使用 EXAFS/XANES 和 PAL 光谱评估短程有序特征和可能的电子缺陷结构。
The influence of Bi on a structure and physical properties of mixed Ga-containing Ge-Se and Ge-Te glasses is studied. Partially ordered nanoscale regions observed with high-resolution transmission electron microscopy are compared with first sharp diffraction peak parameters determined through neutron and X-ray scattering studies. Nanoindentation measurements show quite small deviations in nanohardness (H) and Young's modulus (E) values for glasses with 1 and 5 at.% of Bi, while two regions with different mechanical properties are observed for sample with 10 at.% of Bi. Increase in Bi concentration from 1 at.% to 5 at.% leads to a complete opacity of ~2 mm thick glass in a whole IR range of spectrum, while no drastic difference between these two samples is observed by SEM, TEM, XRD and neutron scattering methods. Short-range order features and possible electron defect structure are evaluated using EXAFS/XANES and PAL spectroscopies, respectively.