Quasi-hydrostatic Limit of LiF as a Pressure Transmitting Medium and Its Equation of States
Quasi-hydrostatic Limit of LiF as a Pressure Transmitting Medium and Its Equation of States
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LiF作为传压介质的准静水极限及其状态方程
DOI：
10.1088/0256-307x/31/5/056201
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发表时间：
2014-04
影响因子：
3.5
通讯作者：
Qin Shan
中科院分区：
文献类型：
--
作者：
Zhu Feng;Wu Xiang;Yang Ke;Qin Shan
用同步辐射X射线衍射法结合金刚石顶压室技术，研究了室温下LiF作为传压介质的准流体静力学极限。在硅油环境下，LiF的物态方程参数为：V-0=65.7(2)埃(3)，B-0=58(3)Gpa，B‘(0)=4.9(2)，无传压介质时，V-0=67.4(3)埃，B-0=51(3)Gpa，B’(0)=4.7(2)。在两个独立的实验中，LiF(111)峰的半峰宽都随着压力的增加而增大。通过对样品室中心的线扫描X射线衍射测量，估计了样品室内的压力分布，其P-max-P-min在40 Gpa以下呈现出约1 Gpa的均匀分布。
Quasihydrostatic limit of LiF as a pressure transmitting medium is investigated by synchrotron radiation x-ray diffraction combined with the diamond anvil cells technique up to 60 GPa at room temperature. The equation-of-state parameters of LiF are determined to be V-0 = 65.7(2) angstrom(3), B-0 = 58(3) GPa and B'(0) = 4.9(2) in the silicon oil environment; V-0 = 67.4(3) angstrom(3), B-0 = 51(3) GPa and B'(0) = 4.7(2) without pressure transmitting medium. The full width at half maximum of LiF (111) peak increases with the increase of pressure in two independent experiments. The pressure distribution in the sample chamber is estimated by line-scanning x-ray diffraction measurements across the chamber's center, which presents as homogeneous with P-max - P-min of about 1 GPa below 40 GPa.
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