FTIR spectra of pseudo-binary sodium borate glasses containing TeO₂

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• 作者：E. Mansour ; ^{emansour68@gmail.com}
• 关键词：Sodium borate glasses ; FTIR spectra ; IR analysis ; Tellurite glasses ; Glass structure
• 刊名：Journal of Molecular Structure
• 出版年：2012
• 期刊代码：62_00222860
• 类别：ch
• 出版时间：25 April, 2012
• 卷：1014
• 期：Complete
• 页码：1-6
• 文件大小：1455 K

摘要

The glass system xTeO₂路(100 鈭?#xA0;x)[0.5Na₂O路0.5B₂O₃] was prepared and measured for Fourier transform infrared spectroscopy. The results show that [BO₃] and [BO₄] were among the main structural units in the investigated glasses as well as [TeO₃] and [TeO₄] groups. Evidence was observed for the presence of boroxol rings in these glasses. By introducing TeO₂ into the glass network, the concentration of Na₂O which is connected with B₂O₃ network is changed and hence trigonal to tetrahedral boron ratio. When 50%of the total Na₂O content was associated with TeO₂ minimum number of [TeO₃] units was observed in the glass network. With higher than 40 mol%TeO₂, there is a constancy of the concentration of [TeO₄] units. Bonds of the type B-O-Te are common at high concentrations of TeO₂ (>40 mol%) which is associated with an increase in the polymerization of the glass network. Introducing TeO₂ into Na₂O路B₂O₃ glasses (1:1) may delay the expected disappearance of non-bridging oxygens (NBOs) in the whole glass network with the decrease in the content of sodium oxide.