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Development of empirical potentials for sodium borosilicate glass systems

机译:硼硅酸钠玻璃系统的经验势的发展

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摘要

New parameter values are proposed for the empirical potentials used to describe SiO_2-B_2O_3-Na_2O alkali borosilicate glass systems. They are based on Buckingham potentials, but include dependence between the fitting parameters and the glass chemical composition to improve the representation of the complex environment around the boron atoms. In particular, the boron anomaly (observed when the [Na_2O]/[B _2O_3] ratio varies) is correctly reproduced. The structural and mechanical properties of a wide range of glass compositions and of reedmergnerite crystals are correctly simulated: bond distances, mean angles, densities, elastic moduli. The deviations from the experimental values are small.
机译:针对用于描述SiO_2-B_2O_3-Na_2O碱金属硼硅酸盐玻璃体系的经验势,提出了新的参数值。它们基于白金汉势,但包括拟合参数与玻璃化学成分之间的依赖性,以改善硼原子周围复杂环境的表示。特别是,正确地再现了硼异常([Na_2O] / [B _2O_3]比变化时观察到)。正确模拟了各种玻璃成分和褐铁矿晶体的结构和机械性能:键距,平均角度,密度,弹性模量。与实验值的偏差很小。

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