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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 >FTIR and UV–VIS spectroscopy investigations on the structure of the europium–lead–tellurate glasses
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FTIR and UV–VIS spectroscopy investigations on the structure of the europium–lead–tellurate glasses

机译：FTIR和UV-VIS光谱学研究-铅-碲玻璃的结构

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摘要

Glasses in the xEu_2O_3·(100-x)[4TeO_2·PbO_2] system where 0≤x≤50 mol% have been prepared using the melt quenching method. The influence of europium ions on the structure of lead–tellurate glasses has been investigated using density measurements, FTIR and UV–VIS spectroscopy. Structural changes produced by increasing the rare earth concentration were followed. The europium and lead ions show a preference towards [TeO_3] structural units causing a deformation of the TeOTe linkages. Structural changes inferred by analyzing the band shapes of IR spectra revealed that the increase of the Eu~(+3) content causes the intercalation of [EuO_n] entities in the [TeO_4] chain network. The excess of oxygen can be supported into the glass network by the formation of [PbO_n] and [EuO_n] structural units. The UV–VIS spectroscopy data show that europium ions enter the glass matrix in the Eu~(2+) and Eu~(3+) valence states, the last being predominant in the studied glasses. The Pb~(+2) ions produce strong absorption in the ultraviolet domain.
机译：采用熔融淬火法制备了xEu_2O_3·（100-x）[4TeO_2·PbO_2]体系中0≤x≤50mol％的玻璃。使用密度测量，FTIR和UV-VIS光谱研究了of离子对铅-碲酸盐玻璃结构的影响。跟随通过增加稀土浓度产生的结构变化。 and离子和铅离子显示出对[TeO_3]结构单元的偏爱，从而导致Te O Te键的变形。通过分析红外光谱的能带形状推断出的结构变化表明，Eu〜（+3）含量的增加引起了[TeO_4]链网络中[EuO_n]实体的嵌入。可以通过形成[PbO_n]和[EuO_n]结构单元将过量的氧气负载到玻璃网络中。 UV-VIS光谱数据表明，euro离子以Eu〜（2+）和Eu〜（3+）价态进入玻璃基质，最后一个在所研究的玻璃中占主导地位。 Pb〜（+2）离子在紫外线域产生强吸收。

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