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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 >On the structure of molybdate-tellurite glasses
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On the structure of molybdate-tellurite glasses

机译：钼酸盐-碲玻璃的结构

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摘要

A model of continuous network of molybdate-tellurite (MoO_3-TeO_2) glasses is developed on the basis of quantum-chemical modeling. The model allows one to relate the glass structure and vibrational properties (in particular, the vibrational frequency, Raman band intensity, and polarization) with glass compo_sition. The continuous molybdate-tellurite glass network. is shown to be formed mainly by structural units of four types, TeO_4 trigonal bipyramids, 0=TeO_2 trigonal pyramids, 0=Mo0_5 single octahedra and 2[O=MoO_5] paired octahedra. No structural units of any other type are necessary to build the contin_uous network. Interpretation of the Raman spectra of molybdate-tellurite glasses in the 550-950cm~(-1) range is suggested. In particular, a strongly polarized Raman band with the maximum in the range of 920-940 cm~(-1) characteristic for these glasses turns out to be caused for the most part by stretching vibrations of Mo=O double bonds in single, 0=MoO_5, and paired, 2[O=-MoO_5], molybdate octahedra, the ratio of single and paired molybdate octahedra concentrations growing almost linearly from 0.4 to 0.5 with MoO_3 content increasing overall the glass formation region (from 10 up to 60 mol%). The model can be applied to analyze the vibrational spectra of molybdate-tellurite glasses of various compositions.
机译：在量子化学建模的基础上，建立了钼酸锂-碲（MoO_3-TeO_2）玻璃的连续网络模型。该模型允许将玻璃结构和振动特性（特别是振动频率，拉曼能带强度和极化）与玻璃成分相关联。连续的钼酸盐-碲玻璃网络。示出主要由四种类型的结构单元形成，即TeO_4三角双锥，0 = TeO_2三角锥，0 = Mo0_5单八面体和2 [O = MoO_5]对八面体。建立连续网络不需要任何其他类型的结构单元。建议对550-950cm〜（-1）范围内的钼酸盐-碲酸盐玻璃的拉曼光谱进行解释。特别是，这些眼镜的最大极化特性拉曼谱带的最大值在920-940 cm〜（-1）范围内，这主要是由于Mo = O双键的单次拉伸振动引起的，0 = MoO_5，和成对的2 [O = -MoO_5]，钼酸八面体，钼酸八面体的单一和成对浓度的比率几乎从0.4线性增长到0.5，MoO_3的含量增加了整个玻璃形成区域（从10到60 mol％ ）。该模型可用于分析各种成分的钼酸盐-碲酸盐玻璃的振动光谱。

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