文章基本信息

标题：Quantification of the boron speciation in alkali borosilicate glasses by electron energy loss spectroscopy
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作者：Shaodong Cheng ; Guang Yang ; Yanqi Zhao 等
期刊名称：Scientific Reports
电子版ISSN：2045-2322
出版年度：2015
卷号：5
DOI：10.1038/srep17526
出版社：Springer Nature
摘要：Transmission electron microscopy and related analytical techniques have been widely used to study the microstructure of different materials. However, few research works have been performed in the field of glasses, possibly due to the electron-beam irradiation damage. In this paper, we have developed a method based on electron energy loss spectroscopy (EELS) data acquisition and analyses, which enables determination of the boron speciation in a series of ternary alkali borosilicate glasses with constant molar ratios. A script for the fast acquisition of EELS has been designed, from which the fraction of BO₄ tetrahedra can be obtained by fitting the experimental data with linear combinations of the reference spectra. The BO₄ fractions (N₄) obtained by EELS are consistent with those from ¹¹B MAS NMR spectra, suggesting that EELS can be an alternative and convenient way to determine the N₄ fraction in glasses. In addition, the boron speciation of a CeO₂ doped potassium borosilicate glass has been analyzed by using the time-resolved EELS spectra. The results clearly demonstrate that the BO₄ to BO₃ transformation induced by the electron beam irradiation can be efficiently suppressed by doping CeO₂ to the borosilicate glasses.