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BaF2–contained tellurite glasses: Quantitative analysis and prediction of elastic properties and ultrasonic attenuation–Part I
Journal of Fluorine Chemistry ( IF 1.9 ) Pub Date : 2018-03-12 , DOI: 10.1016/j.jfluchem.2018.03.005
Amin Abd El-Moneim

In this article, the semi-empirical formulas of Abd El-Moneim’s model were applied to predict the composition dependence of ultrasonic attenuation coefficient in BaF2-contained tellurite glasses, for the first time. In addition to this, the various experimental elastic moduli and Poisson’s ratio were analyzed quantitatively and predicted on the basis of the bond compression, ring deformation and Makishima-Mackenzie’s models. The results show that:

The molar volume, packing density, fractal bond connectivity, average cross-link density, number of network bonds per unit volume and average atomic ring size play a dominant role in predicting the modifier role of the alkaline earth fluoride BaF2 in binary fluorotellurite BaF2-TeO2 glasses.

The theoretically calculated values of Poisson’s ratio on the basis of the bond compression model are in a better agreement with the corresponding experimentally measured values, when compared with those theoretically calculated on the basis of Makishima-Mackenzie’s model.

The agreement between theoretical and experimental values is excellent for bulk, good for Young’s and longitudinal moduli and unsatisfactory for shear modulus. The divergence between theoretical and experimental values has been attributed to the anomalous behavior between elastic moduli and dissociation energy per unit volume of the glass.

The correlation between ultrasonic attenuation coefficient and the most significant compositional and structural parameters was achieved on the basis of Abd El-Moneim’s model.



中文翻译:

含BaF 2的碲酸盐玻璃:弹性和超声衰减的定量分析和预测–第一部分

本文首次利用Abd El-Moneim模型的半经验公式来预测含BaF 2的亚碲酸盐玻璃中超声衰减系数的成分依赖性。除此之外,还对各种实验弹性模量和泊松比进行了定量分析,并根据键压缩,环变形和Makishima-Mackenzie模型进行了预测。结果表明:

摩尔体积,堆积密度,分形键连接,平均交联密度,每单位体积和平均原子环的大小网络键的数量在预测的碱土氟化物的BaF改性剂的作用发挥主导作用2二进制fluorotellurite的BaF 2 -TeO 2杯。

与基于Makishima-Mackenzie模型的理论计算值相比,基于键压缩模型的泊松比的理论计算值与相应的实验测量值具有更好的一致性。

理论值和实验值之间的一致性对于体积而言是优异的,对于杨氏和纵向模量而言是良好的,而对于剪切模量而言则不令人满意。理论值与实验值之间的差异已归因于玻璃单位体积弹性模量与离解能之间的反常行为。

在Abd El-Moneim模型的基础上,获得了超声衰减系数与最重要的成分和结构参数之间的相关性。

更新日期:2018-03-12
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