Energy-dispersive x-ray diffraction equipment for fluids at extreme conditions of high temperatures and high pressures
Energy-dispersive x-ray diffraction equipment for fluids at extreme conditions of high temperatures and high pressures
复制标题
适用于高温高压极端条件下流体的能量色散 X 射线衍射设备
DOI：
10.1063/1.1149556
复制
发表时间：
1999
影响因子：
1.6
通讯作者：
S. Hosokawa
中科院分区：
文献类型：
--
作者：
K. Tamura;M. Inui;S. Hosokawa
使用能量高达 70 keV 的高能 X 射线源、带有氦气加压铍窗的高压容器以及由单晶蓝宝石制成的新型样品池，开发了一种适用于高压（高达 2000 巴）和高温（高达 1650°C）下流体材料的能量色散 X 射线衍射技术。使用这一技术可以克服流体 X 射线衍射测量固有的几个困难，例如样品的高蒸气压和高 X 射线吸收常数、样品池的 X 射线散射和吸收以及高压容器的 X 射线吸收。为了展示该设备的卓越潜力，报告了液-汽亚临界流体Hg和Se的实验实例。
An energy-dispersive x-ray diffraction technique for fluid materials under high pressure, up to 2000 bar, and high temperature, up to 1650 °C, has been developed using an x-ray source with high energy up to 70 keV, a high-pressure vessel with Be windows pressurized with He gas, and a new sample cell made of single crystal sapphire. Using this technique one can overcome several difficulties intrinsic with x-ray diffraction measurements of fluids, such as high vapor pressure and high x-ray absorption constant of samples, x-ray scattering and absorption by sample cells, and x-ray absorption by high-pressure vessels. In order to show an excellent potential of the equipment, examples of the experiments for the liquid-vapor subcritical fluid Hg and Se are reported.