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首页> 外文期刊>Journal of Non-Crystalline Solids: A Journal Devoted to Oxide, Halide, Chalcogenide and Metallic Glasses, Amorphous Semiconductors, Non-Crystalline Films, Glass-Ceramics and Glassy Composites >Effect of silver doping on the structure and phase separation of sulfur-rich As-S glasses: Raman and SEM studies
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Effect of silver doping on the structure and phase separation of sulfur-rich As-S glasses: Raman and SEM studies

机译：银掺杂对富硫As-S玻璃结构和相分离的影响：拉曼和SEM研究

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摘要

We report on the structural details and microphase separation of the bulk glasses Ag-x center dot (AS(33)S(67))(100-x) for 0 <= x <= 25. Class-glass phase separation occurs over a wide range of Ag content, i.e. 4 <= x <= 20. An off-resonant polarized Raman spectroscopic study has been carried out to elucidate structural aspects at the short- and medium-range structural order of the glasses. Analysis of Raman spectra revealed quantitative changes of the sulfur-rich microenvironments that reduce upon adding Ag. Scanning electron microscopy combined with X-rays microanalysis have been utilized to examine the type and extent of phase separation, and to provide quantitative details on the atomic concentrations in the Ag-poor and Ag-rich phases. It has been shown that at similar to 7 at.% Ag the Ag-rich phase percolates through the structure; this effect can be associated with an ionic-to-superionic behavior of these glasses in accordance with similar studies on the stoichiometric arsenic sulfide glass: although the phase separation observed in the present glasses is qualitatively different.
机译：我们报告了散装玻璃Ag-x中心点（AS（33）S（67））（100-x）的结构细节和微相分离，其中0 <= x <= 25。宽范围的银含量，即4 <= x <=20。已经进行了非共振偏振拉曼光谱研究，以阐明玻璃的中短范围结构级的结构方面。拉曼光谱分析表明，富硫微环境的定量变化随添加银而降低。扫描电子显微镜与X射线显微分析相结合已用于检查相分离的类型和程度，并提供有关贫银相和富银相中原子浓度的定量细节。已经表明，富集到Ag的相以接近7 at。％的Ag渗入整个结构。根据对化学计量的硫化砷玻璃的类似研究，这种影响可能与这些玻璃的离子至超离子行为有关：尽管在本玻璃中观察到的相分离在质量上有所不同。

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