Generic α relaxation in a strong GeO2 glass melt
Generic α relaxation in a strong GeO2 glass melt
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强 GeO2 玻璃熔体中的一般 α 弛豫
DOI：
10.1103/physreve.107.l012602
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发表时间：
2023
影响因子：
2.4
通讯作者：
Sidebottom, D. L.
中科院分区：
文献类型：
--
作者：
Sidebottom, D. L.
用光子相关光谱法测量了玻璃形成过程中的粘弹性弛豫。在这种“强”玻璃形成体中的弛豫表现出与在许多简单的有机“易碎”液体中发现的相同的非指数衰减。这一发现反驳了长期以来的猜想，即非指数的粘性弛豫附近的玻璃化转变相关的液体的脆弱性。相反，研究结果提供了支持最近的建议，非指数性参数的松弛在过冷液体显示一个普遍的valueear的玻璃化转变。
The viscoelasticrelaxation in glass-formingwas measured over a range of temperatures near the glass transition using photon correlation spectroscopy. The relaxation in this “strong” glass former exhibits a nonexponential decay identical to that found in a great many simple organic “fragile” liquids. This finding contradicts the longstanding conjecture that nonexponentiality of viscous relaxations near the glass transition are correlated to the liquid's fragility. Instead, the findings offer support for a recent proposal that the nonexponentiality parameter of the-relaxation in supercooled liquids displays a universal valuenear the glass transition.