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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 >Structural, optical and thermal properties of nickel doped bismuth borate glasses
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Structural, optical and thermal properties of nickel doped bismuth borate glasses

机译：镍掺杂硼酸铋玻璃的结构，光学和热性能

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摘要

Nickel doped Bismuth Borate glasses with composition (70B(2)O(3)-(30-x)Bi2O3-xNiO) where x = 0,0.5,1.0,1.5,2.0 (wt%) have been synthesized by conventional melt quenching technique. X-Ray Diffractograms have confirmed the amorphous nature of the prepared glasses. The calculated physical parameters such as density, molar volume, average boron-boron separation, ion concentration and inter ionic distance provided the information about the structural stability of glass samples. DTA and OPD confirmed the decrease in glass transition temperature (T-g) with increase in Ni content. The FTIR and Raman studies clearly revealed that the glass network mainly comprises of [BiO3], [BiO6], [BO3] and [BO4] units. It is also observed that the introduction of dopant (Ni) and modifier (Bi) leads to the conversion of [BO3] trigonal units into the (BO4) tetragonal units due to the increase in non-bridging oxygen atoms which results in the increase of degree of disorder in the glass network. The optical absorption measurements (UV) carried out for well polished glass samples show a decrease in optical band gap with the increase in Ni doping. This observation was further supported by the urbach energy calculations and metallization criterion of the prepared glass samples. The electronegativity and electronic polarizability values revealed the ionic character of glass samples.
机译：镍掺杂铋硼酸盐玻璃配合物（70b（2）o（3） - （30-x）Bi2O3-xIO），其中x = 0.0.5,1.0,1.5,2.0（wt％）通过常规熔体淬火技术合成。 X射线衍射图已经证实了制备玻璃的无定形性质。计算出的物理参数，例如密度，摩尔体积，平均硼 - 硼分离，离子浓度和离子间距离，提供了关于玻璃样品结构稳定性的信息。 DTA和OPD通过增加Ni含量证实了玻璃化转变温度（T-G）的降低。 FTIR和拉曼的研究清楚地表明，玻璃网络主要包括[Bio3]，[Bio6]，[Bo3]和[Bo4]单位。还观察到，由于非桥接氧原子的增加，引入掺杂剂（Ni）和改性剂（BA）和改性剂（BA4）Tigonal单元的转化为（Bo4）四方单元，这导致增加玻璃网络中的无序程度。用于良好抛光的玻璃样品进行的光学吸收测量（UV）显示光带隙中的降低随NI掺杂的增加。通过预备的玻璃样品的URBACH能量计算和金属化标准进一步支持该观察结果。电信和电子极化性值显示玻璃样品的离子特性。

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