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首页> 外文期刊>Journal of Non-Crystalline Solids: A Journal Devoted to Oxide, Halide, Chalcogenide and Metallic Glasses, Amorphous Semiconductors, Non-Crystalline Films, Glass-Ceramics and Glassy Composites >Mossbauer and IR investigations of iron ultraphosphate glasses
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Mossbauer and IR investigations of iron ultraphosphate glasses

机译：超磷酸铁玻璃的Mossbauer和IR研究

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摘要

The structures of xFeO (.) (1-x)P2O5 glasses (0 less than or equal to x less than or equal to 0.50) prepared in sealed silica ampoules have been investigated using Mossbauer and infrared (IR) spectroscopies. Mossbauer results indicate that the glasses contain 6-18% Fe(III). Both Fe(II) and Fe(III) ions occupy octahedral coordination environments in these glasses. Analysis of the IR spectra indicates that the structure of glass transforms systematically from a three-dimensional P2O5 network (dominated by Q(3) tetrahedra) to a two-dimensional network (dominated by Q(2) units) as the FeO content increases. This transformation is evidenced by the replacement of the IR band at 1380 cm(-1) attributed to P=O vibrations on isolated Q(3) sites with the band at 1260 cm(-1) band which is attributed to asymmetric vibrations of PO2 groups on the Q(2) tetrahedra. In addition, a new IR band at 1317 cm(-1) is created when FeO is added to P2O5 and this band is assigned to P=O bonds that participate in the coordination environments of the Fe-octahedra. At x similar to 0.35 FeO, the P=O bonds that remain are only those that coordinate with the Fe-octahedra. These structural changes are similar to those observed for other ultraphosphate glasses. (C) 2003 Elsevier B.V. All rights reserved. [References: 26]
机译：使用Mossbauer和红外（IR）光谱技术研究了在密封的二氧化硅安瓿瓶中制备的xFeO（。）（1-x）P2O5玻璃（0小于或等于x小于或等于0.50）的结构。 Mossbauer结果表明该玻璃含有6-18％的Fe（III）。 Fe（II）和Fe（III）离子在这些玻璃中均占据八面体配位环境。红外光谱分析表明，随着FeO含量的增加，玻璃的结构会从三维P2O5网络（由Q（3）四面体为主）转变为二维网络（由Q（2）单元为主）。通过将孤立的Q（3）站点上的P = O振动引起的1380 cm（-1）的IR波段替换为PO2的非对称振动引起的1260 cm（-1）的波段，可以证明这种转变。 Q（2）四面体上的基团。此外，当将FeO添加到P2O5中时，会在1317 cm（-1）处创建一个新的IR带，并将该带分配给参与Fe-八面体配位环境的P = O键。 x类似于0.35 FeO时，剩余的P = O键只是与八面体Fe配位的键。这些结构变化与其他超磷酸盐玻璃所观察到的相似。 （C）2003 Elsevier B.V.保留所有权利。 [参考：26]

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