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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 >Study of elastic moduli of lithium borobismuthate glasses using ultrasonic technique
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Study of elastic moduli of lithium borobismuthate glasses using ultrasonic technique

机译：超声波技术研究硼酸铋锂玻璃的弹性模量

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摘要

Ultrasonic studies on x B_2O_325 Li_2O(75 - x) Bi_2O_3, (0 ≤ x ≤ 75 mol%) glasses have been carried out. The elastic moduli of glasses have been investigated using ultrasonic velocity measurements at 4 MHz. The results revealed an increase of the ultrasonic velocity and Debye temperature with the increase of the B _2O_3 content which was attributed to the increase in the packing density, the local contraction of the network around the Bi and Li cations and the increase of the number of bonds per unit volume. Also, the increase of the elastic moduli with the increase in the B_2O _3 content is affected with the increase in the dissociation energy, the average cross-link density, the increase in the number of bridging oxygen atoms, and the substitution of high bond strength BO with low bond strength BiO. The optical properties such as the refractive index, the energy gap and the optical polarizability were evaluated from the values of the elastic moduli. It was observed that as the bulk modulus increases, the optical energy gap increases and both the refractive index and the optical basicity decrease.
机译：已对x B_2O_325 Li_2O（75-x）Bi_2O_3（0≤x≤75 mol％）玻璃进行了超声研究。已经使用4 MHz的超声波速度测量研究了玻璃的弹性模量。结果表明，随着B _2O_3含量的增加，超声波速度和德拜温度也随之增加，这归因于堆积密度的增加，Bi和Li阳离子周围网络的局部收缩以及B原子数量的增加。每单位体积的键数。另外，随着B_2O _3含量的增加，弹性模量的增加也受到解离能，平均交联密度，桥连氧原子数的增加以及高键强度的取代的影响。具有低键合强度BiO的BO。从弹性模量的值评估诸如折射率，能隙和光学极化率的光学性质。观察到，随着体积模量的增加，光能隙增加，并且折射率和光学碱度均降低。

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