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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 >Electronic polarizability and its temperature dependence of Bi _2O_3-B_2O_3 glasses
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Electronic polarizability and its temperature dependence of Bi _2O_3-B_2O_3 glasses

机译：Bi _2O_3-B_2O_3玻璃的电子极化率及其温度依赖性

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摘要

The refractive index (n) and density (ρ) of xBi_2O _3-(100 - x)B_2O_3 glasses with x = 32.5-60 (mol%) are measured in the temperature range of 30-150 °C in order to clarify the temperature dependence of the electronic polarizability of oxide ions (α_(O2-)) and optical basicity (Λ). It is found that the values of n, α_(O2-), and Λ increase almost linearly with increasing temperature. The value of the temperature dependence of refractive index, dn/dT, increases with increasing Bi_2O_3 content. Contrary, the values of dα_(O2-)/dT, and dΛ/dT, tend to decrease with increasing Bi_2O_3 content. It is suggested that the temperature dependence of the electronic polarizability of oxide ions in xBi_2O_3-(100 - x)B_2O_3 glasses has a large contribution for the temperature dependence of the refractive index in comparison with the contribution of the volume thermal expansion coefficient. The features in the temperature dependence of α_(O2-) and Λ in the present glass system might be related to the extremely weak single bond strength of Bi_2O_3 compared with the strong single bond strength of B_2O_3.
机译：在30-150°C的温度范围内测量x = 32.5-60（mol％）的xBi_2O _3-（100-x）B_2O_3玻璃的折射率（n）和密度（ρ），以澄清温度取决于氧化物离子的电子极化率（α_（O2-））和光学碱度（Λ）。已经发现，n，α_（O2-）和Λ的值随着温度的升高几乎呈线性增加。折射率的温度依赖性值dn / dT随着Bi_2O_3含量的增加而增加。相反，随着Bi_2O_3含量的增加，dα_（O2-）/ dT和dΛ/ dT的值趋于降低。建议与体积热膨胀系数的贡献相比，xBi_2O_3-（100-x）B_2O_3玻璃中氧化物离子的电子极化率的温度依赖性对折射率的温度依赖性有很大的贡献。与B_2O_3的强单键强度相比，本玻璃系统中α_（O2-）和Λ的温度依赖性特征可能与Bi_2O_3的单键强度极弱有关。

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