Raman scattering is a powerful probe of local structure (LS) of glasses. In Sodium Phosphate Glasses (SPGs), we show that both LS composed of Qⁿ species and Extended Range Structures (ERS) composed of Long Chains (LCs), Large Rings (LRs), and Small Rings (SRs) can be decoded by Raman scattering. The trimodal distribution of P‐O_terminal stretch modes of Q² species and P‐O_bridging at x < 50% are manifestations of these ERS. These two pairs of triads of modes are uniquely identified with Q² units present in either LCs, or LRs, or SRs. The existence three phases of c‐NaPO₃ composed of 3‐membered rings, 6‐membered rings, and infinitely long chains has facilitated the identification. The Intermediate Phase (IP) in SPGs extends in the 37.5 < x < 46.0% range, the Stressed‐rigid Phase in the 46.0% < x < 50%, and the Flexible Phase in the 18% < x < 37.5% range of soda. We show the IP consists predominantly of LCs (82%), with a minority of LRs (15%) and SRs (3%). The LR‐ and SR‐fractions increase measurably in the non‐IP phases. The structural finding is in harmony with the high configurational entropy of the IP glasses that leads aging to be qualitatively suppressed.

中文翻译：

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局部和扩展分子结构对（Na2O）x（P2O5）100-x玻璃拓扑相功能的拉曼散射和调制DSC作用

拉曼散射是对眼镜局部结构（LS）的有力探测。在磷酸钠玻璃（SPG）中，我们显示了由Q ⁿ种组成的LS和由长链（LC），大环（LR）和小环（SR）组成的扩展范围结构（ERS）都可以被拉曼解码。散射。 这些ERS的表现是Q ²物种的P‐O_末端拉伸模式的三峰分布和P‐O_桥接在x <50％处。这两对模式的三联体以存在于LC或LR或SR中的Q ²单元唯一标识。c-NaPO的存在三个阶段₃ 3-元环构成的，6-元环，和无限长链促进了鉴定。SPG中的中间相（IP）的范围在37.5 <  x  <46.0％的范围内，应力-刚性相在46.0％<  x  <50％的范围内，而柔性相在18％<  x  <37.5％的苏打范围内。我们显示IP主要由LC（82％）组成，具有少数LR（15％）和SR（3％）。在非IP阶段，LR和SR分数显着增加。结构上的发现与IP玻璃的高配置熵相吻合，IP玻璃的定性导致了老化。