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arXiv 0806.1126cond-mat.mtrl-sci
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超透明微晶玻璃的结构因子与瑞利散射猝灭

Ultratransparent glass-ceramics: the structure factor and the quenching of the Rayleigh scattering

M. Mattarelli, M. Montagna, P. Verrocchio

摘要:

具有纳米晶体的玻璃-陶瓷呈现出比根据瑞利散射理论预期的更高的透明度。这种超透明性归因于纳米颗粒的空间相关性。计算了一个简单的模型系统的结构因子,在不同的体积填充因子,随机顺序添加的相等的球体。由颗粒不能重叠的约束给出的空间相关性产生在其低$q$尾部具有低$S(q)$的衍射峰,这与光散射有关。玻璃陶瓷中产生高透明度的物理机制被证明是散射体数量的低密度波动。

英文摘要:

Glass-ceramics with nanocrystals present a transparency higher than that expected from the theory of Rayleigh scattering. This ultra-transparency is attributed to the spatial correlation of the nanoparticles. The structure factor is calculated for a simple model system, the random sequential addition of equal spheres, at different volume filling factor. The spatial correlation given by the constraint that particles cannot superimpose produces a diffraction peak with a low $S(q)$ in its low-$q$ tail, which is relevant for light scattering. The physical mechanism producing high transparency in glass-ceramics is demonstrated to be the low density fluctuation in the number of scatterers.

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