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Hydroxyl groups in high-purity silica glass

机译:高纯度石英玻璃中的羟基

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IR absorption spectra of high-purity silica glass (SiO2) of different types containing from 0.1 to 10(3) ppm of hydroxyl (OH) groups were studied and quantum-chemical calculations of different OH structures in the silica glass network were performed. On their basis a new approach to the problem of OH groups embedded in the glass network was proposed. It was shown that OH groups in high-purity SiO2 occur mainly singly rather than as paired groups. Some of them are linked by hydrogen bonds to bridging oxygen atoms and not to each other, as is considered now. A new decomposition of the fundamental OH-stretching vibrational band into components was proposed. (C) 2000 Published by Elsevier Science B.V. All rights reserved. [References: 13]
机译:研究了含有0.1至10(3)ppm羟基(OH)基团的不同类型的高纯度石英玻璃(SiO2)的红外吸收光谱,并进行了石英玻璃网络中不同OH结构的量子化学计算。在此基础上,提出了一种解决嵌入玻璃网络中的OH基的新方法。结果表明,高纯度SiO2中的OH基团主要单独出现,而不是成对出现。正如现在所考虑的那样,它们中的一些通过氢键与桥连的氧原子相连,而不是彼此相连。提出了将基本的拉伸OH振动带分解为组分的新方法。 (C)2000,Elsevier Science B.V.保留所有权利。 [参考:13]

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