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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 >Physical aging effect on the boson peak and heterogeneous nanostructure of a silicate glass
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Physical aging effect on the boson peak and heterogeneous nanostructure of a silicate glass

机译：物理老化对硅酸盐玻璃的玻色子峰和异质纳米结构的影响

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摘要

The effect of physical aging on a silicate glass has been investigated by low-frequency Raman scattering. It was observed that the low-frequency side of the excess of Raman scattering, or boson peak, due to harmonic vibration modes decreases in intensity with the thermal annealing (aging) at a temperature lower than the glass transition temperature (T-g), after quenching (rejuvenation) from a temperature higher than T-g. Moreover, it was found that the lowering of the very low-frequency scattering mainly due to anharmonic modes becomes more pronounced when the aging temperature is decreased. These observations are interpreted in the frame of the energy landscape, and by considering the model of the glass heterogeneous cohesion at the nanometric scale. (c) 2006 Elsevier B.V. All rights reserved.
机译：已经通过低频拉曼散射研究了物理老化对硅酸盐玻璃的影响。观察到，淬火后，在低于玻璃化转变温度（Tg）的温度下，通过热退火（时效），由于谐波振动模式，过量的拉曼散射或玻色子峰的低频侧强度降低。 （回春）温度高于Tg。此外，已经发现，当降低时效温度时，主要由于非谐模式引起的非常低频散射的降低变得更加明显。这些观察结果在能量格局的框架中进行解释，并考虑了纳米尺度下玻璃异质凝聚的模型。 （c）2006 Elsevier B.V.保留所有权利。

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