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首页> 外文期刊>Physica, B. Condensed Matter >Raman spectra and density of Li2O-B2O3-GeO2 glasses with high Li2O content
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Raman spectra and density of Li2O-B2O3-GeO2 glasses with high Li2O content

机译：高Li2O含量的Li2O-B2O3-GeO2玻璃的拉曼光谱和密度

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摘要

One series of glass having the molar formula y[42.5Li(2)O center dot 57.5GeO(2)] center dot (1-y)[42.5Li(2)O center dot 57.5B(2)O(3)] where y ranged between 0 and 0.55 has been prepared and measured for density, molar volume and Raman spectra. No density anomaly was observed throughout the composition range of the studied glasses. The large difference in molecular mass between that of B2O3 and GeO2 is the reason for the density change. The linear change in density reveals that each oxide in the glass would contribute to the density by a specific factor. Alkali oxide is incorporated into the borate as well as the germanate networks. There are three essential Raman broad bands at similar to 525, similar to 775 and similar to 835 cm(-1). With increasing GeO2 content, the number of NBOs associated with Q(2) decreases in the germanate network while three-membered rings of GeO4 tetrahedra are formed. The number of borate groups containing four coordinated boron decreases with increasing GeO2 content at the expense of B2O3.
机译：一系列具有摩尔公式y [42.5Li（2）O中心点57.5GeO（2）]中心点（1-y）[42.5Li（2）O中心点57.5B（2）O（3）]的玻璃制备了y，其y在0至0.55之间，并测量了密度，摩尔体积和拉曼光谱。在所研究的玻璃的整个组成范围内均未观察到密度异常。 B 2 O 3和GeO 2的分子量之间的巨大差异是密度变化的原因。密度的线性变化表明，玻璃中的每种氧化物都会通过特定的因素对密度做出贡献。碱金属氧化物被掺入硼酸盐和锗酸盐网络中。存在三个基本的拉曼宽带，分别类似于525、775和835 cm（-1）。随着GeO2含量的增加，锗酸盐网络中与Q（2）相关的NBO数量减少，同时形成了GeO4四面体三元环。含有四个配位硼的硼酸盐基团的数量随着GeO2含量的增加而减少，但以B2O3为代价。

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