(1-x)SiO₂·xGeO₂玻璃的原位高压高温拉曼研究
In situ high pressure and high temperature Raman studies of (1-x)SiO(2)xGeO(2) glasses.
作者信息
Le Parc R, Ranieri V, Haines J, Cambon M, Cambon O, Levelut C, Clément S
机构信息
Laboratoire des Colloides Verres et Nanomatériaux, UMR CNRS-UM2 5587, Université Montpellier 2, Place Eugène Bataillon, 34095 Montpellier Cedex 5, France.
出版信息
J Phys Condens Matter. 2009 Sep 16;21(37):375109. doi: 10.1088/0953-8984/21/37/375109. Epub 2009 Aug 21.
The structure of glasses in the binary system SiO(2)-GeO(2) has been studied by Raman spectroscopy. Our results are consistent with mixing of SiO(2) and GeO(2) tetrahedra. The changes induced by temperature and by pressure on the structure are monitored by in situ measurements on the same mixed glasses. Anomalous temperature dependences are observed not only for SiO(2) glass and GeO(2) glass but also for mixed glasses. Particular attention is focused on the pressure densification mechanism in mixed glasses. Via the pressure dependence of the width of the main Raman band, we show that the compression mechanism in mixed glasses is intermediate between that of the end members.
通过拉曼光谱研究了二元体系SiO₂-GeO₂中玻璃的结构。我们的结果与SiO₂和GeO₂四面体的混合情况一致。通过对相同混合玻璃进行原位测量来监测温度和压力对结构的影响。不仅在SiO₂玻璃和GeO₂玻璃中，而且在混合玻璃中都观察到了异常的温度依赖性。特别关注混合玻璃中的压力致密化机制。通过主拉曼带宽度的压力依赖性，我们表明混合玻璃中的压缩机制介于端元玻璃之间。
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