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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 >Preparation and characterization of glasses in the Ag2S+B2S3+GeS2 system
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Preparation and characterization of glasses in the Ag2S+B2S3+GeS2 system

机译：Ag2S + B2S3 + GeS2系统中玻璃的制备和表征

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The glass forming range of the Ag2S + B2S3 + GeS2 ternary system was investigated for the first time and a wide range of ternary glasses were obtained. The Archimedes' method was used to determine the densities of the Ag-B-Ge glasses. The thermal properties of these thioborogermanate glasses were studied by DSC and TMA. The Raman, IR and NMR spectroscopy were used to explore the short-range order structure of the binary (Ag-B) and (Ag-Ge) and ternary (Ag-B-Ge) glasses. The results show the presence of bridging sulfur tetrahedral units, GeS4/2 and AgBS4/2, and trigonal units, BS3/2, in the ternary glasses. Non-bridging sulfur units, AgSGeS3/2 and Ag3B3S3S3/2 six membered rings, are also observed in these glasses at higher Ag2S modification levels because the further addition of Ag2S results in the degradation of the bridging structures to form non-bridging structures. The NMR studies show that Ag2S goes into the GeS2 subnetwork to form Ag3S3GeS1/2 groups before going to the B2S3 subnetwork. In doing so, it is suggested that B10S20 supertetrahedra exist in Ag2S + B2S3 and Ag2S + B2S3 + GeS2 glasses. Significantly B-S-Ge bonds form in the B2S3 + GeS2 glasses, whereas they appear to be absent in the ternary glasses. From these observations, a structural model for these glasses has been developed and proposed. (C) 2003 Elsevier B.V. All rights reserved. [References: 29]
机译：首次研究了Ag2S + B2S3 + GeS2三元体系的玻璃形成范围，并获得了广泛的三元玻璃。用阿基米德法测定Ag-B-Ge玻璃的密度。通过DSC和TMA研究了这些硫代硼锗酸盐玻璃的热性能。拉曼光谱，红外光谱和核磁共振光谱用于研究二元（Ag-B），（Ag-Ge）和三元（Ag-B-Ge）玻璃的短程结构。结果显示在三元玻璃中存在桥接的硫四面体单元GeS4 / 2和AgBS4 / 2，以及三角单元BS3 / 2。在这些玻璃中，在较高的Ag2S改性水平下，还观察到非桥接硫单元AgSGeS3 / 2和Ag3B3S3S3 / 2六元环，因为进一步添加Ag2S会导致桥接结构降解，从而形成非桥接结构。 NMR研究表明，Ag2S在进入B2S3子网络之前先进入GeS2子网络形成Ag3S3GeS1 / 2基团。因此，建议在Ag2S + B2S3和Ag2S + B2S3 + GeS2玻璃中存在B10S20超四面体。在B2S3 + GeS2玻璃中显着形成B-S-Ge键，而在三元玻璃中似乎不存在。基于这些观察，已经开发并提出了用于这些眼镜的结构模型。 （C）2003 Elsevier B.V.保留所有权利。 [参考：29]

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