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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 >Structure and physical properties of Bi_2O_3-B _2O_3-Ga_2O_3 glasses
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Structure and physical properties of Bi_2O_3-B _2O_3-Ga_2O_3 glasses

机译：Bi_2O_3-B _2O_3-Ga_2O_3玻璃的结构和物理性质

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摘要

Glasses with compositions xBi_2O_3-35B _2O_3-(65 - x)Ga_2O_3 (x = 45, 50, 55, 60 mol%) were prepared by conventional melting method. The thermal properties were investigated by differential thermal analysis (DTA) and the structures of the glasses were probed by infrared, Raman and X-ray photoelectron spectroscopies (XPS). The results show that both density and refractive index increase with increase of Bi_2O_3. The glass transition temperature (T_g), onset crystallization temperature (T_x) and ΔT (T_x - T_g) decrease with the content of Bi_2O_3. The glass network is mainly constituted by the [BiO_6] octahedron, [BO_3] triangle, [BO_4] tetrahedron and steady [GaO_4] tetrahedron structural units. Borate oxide exists mainly in [BO_3] units in the glass. [BO_4] units are converted into [BO_3] with increasing Bi_2O _3 by producing more non-bridging oxygens. Raman and XPS investigation indicates that Bi~(5+) ions may be formed in the glass containing 60 mol% Bi_2O_3.
机译：通过常规熔融方法制备具有xBi_2O_3-35B_2O_3-（65-x）Ga_2O_3（x = 45、50、55、60 mol％）组成的玻璃。通过差热分析（​​DTA）研究了热性能，并通过红外，拉曼和X射线光电子能谱（XPS）探测了玻璃的结构。结果表明，随着Bi_2O_3的增加，密度和折射率均增加。玻璃化转变温度（T_g），起始结晶温度（T_x）和ΔT（Bi_O_3）随着Bi_2O_3的含量而降低。玻璃网络主要由[BiO_6]八面体，[BO_3]三角形，[BO_4]四面体和稳定的[GaO_4]四面体结构单元构成。硼酸盐氧化物主要以[BO_3]为单位存在于玻璃中。通过产生更多的不桥接氧，随着Bi_2O _3的增加，[BO_4]单位转化为[BO_3]。拉曼和XPS研究表明，在含60 mol％Bi_2O_3的玻璃中可能形成Bi〜（5+）离子。

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