Small- and wide-angle scattering measurement of suppression of Peielrs distortion in liquids

抑制液体中 Peielrs 畸变的小角和广角散射测量

• 批准号: 21740265
• 负责人: CHIBA Ayano
• 金额: $ 2.91万
• 依托单位: Keio University
• 依托单位国家: 日本
• 项目类别: Grant-in-Aid for Young Scientists (B)
• 财政年份: 2009
• 资助国家: 日本
• 起止时间: 2009 至 2010
• 项目状态: 已结题
• 来源: https://kaken.nii.ac.jp/grant/KAKENHI-PROJECT-21740265/
• 关键词: 液体; 金属; 圧力誘起相転移; パイエルス歪; 液体液体相転移; 静的構造; 圧力; 放射光

It is well-known that there are pressure-induced suppressions of distortions in crystalline systems. For liquids, same kinds of pressure-induced structural changes have been expected. To clarify the possibility of such structural changes and how pressure affect the structure in liquids, we performed x-ray diffraction measurements under high pressure and high temperature. We designed a new pressure cell to cover wide scale (i.e., low scattering angles) of fluctuations, and studied polymer melt and liquid GeTe mixtures. For the polymer melt, we found a pressure-induced second-order-like phase transition for the first time, and for the liquid GeTe, we clarified the phase diagram of this liquid system under pressure.

众所周知，晶体系统中存在压力诱导的扭曲抑制。对于液体，预计相同的压力引起的结构变化。为了阐明这种结构变化的可能性以及压力如何影响液体的结构，我们在高压和高温下进行了X射线衍射测量。我们设计了一个新的压力电池，以覆盖波动的大规模（即低散射角），并研究了聚合物熔体和液体Gete混合物。对于聚合物熔体，我们首次发现了压力诱导的二阶样相变，对于液体Gete，我们在压力下阐明了该液体系统的相图。

项目成果

日本語

日本人