Structural and optical absorption studies on Cr2O3 doped SrO-P2O5 glasses.,Spectrochimica Acta Part A: Molecular and Biomolecular Spectroscopy

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Structural and optical absorption studies on Cr2O3 doped SrO-P2O5 glasses.
Spectrochimica Acta Part A: Molecular and Biomolecular Spectroscopy ( IF 4.3 ) Pub Date : 2019-11-20 , DOI: 10.1016/j.saa.2019.117840
G El-Damrawi ₁ , A M Abdelghany ₂ , A H Oraby ₁ , M A Madshal ₃

Affiliation

Cr2O3 doped glasses in the system xCr2O3-(60-x) P2O5-40SrO, where x = 0.0, 0.025, 0.05, 0.1, 0.2, 0.4 & 0.6 mol% were prepared and investigated by X-ray, UV-Vis, and FT infrared spectroscopy. According to the X-ray data, no sharp peaks can be observed, but only abroad halo which points the amorphous nature of the glass samples. Optical absorptions have shown that Cr ions are present in two possible oxidation states (trivalent & hexavalent). Increasing Cr2O3 concentrations in the glass network cause a reduction in the indirect and direct optical energy gap of prepared samples from 3.94-3.5 eV and 4.92-4.4 eV, respectively. This behavior is related to the network forming ability of Cr2O3. FTIR spectra of Cr2O3 containing glass showed some differences compared to base glass samples. In addition, calculated physical and optical parameters reveals a close similarity to base glass that can be correlated to the minor addition of Cr2O3.

中文翻译：

Cr2O3掺杂SrO-P2O5玻璃的结构和光吸收研究。

制备了xCr2O3-（60-x）P2O5-40SrO系统中的Cr2O3掺杂玻璃，其中x = 0.0、0.025、0.05、0.1、0.2、0.4和0.6 mol％，并通过X射线，UV-Vis和FT进行了研究红外光谱。根据X射线数据，没有观察到尖锐的峰，而只有国外的光晕表明了玻璃样品的无定形性质。光学吸收表明，Cr离子以两种可能的氧化态（三价和六价）存在。玻璃网络中Cr2O3浓度的增加导致所制备样品的间接和直接光能隙分别从3.94-3.5 eV和4.92-4.4 eV减小。此行为与Cr2O3的网络形成能力有关。与基础玻璃样品相比，含Cr2O3的玻璃的FTIR光谱显示出一些差异。此外，

更新日期：2019-11-21

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