Development of density measurement for metals at high pressures and high temperatures uding X-ray absorption imaging combined with externally heated diamond anvil cell
Development of density measurement for metals at high pressures and high temperatures uding X-ray absorption imaging combined with externally heated diamond anvil cell
复制标题
利用 X 射线吸收成像结合外部加热金刚石砧池开发高压和高温下金属的密度测量
DOI：
10.1016/j.crte.2018.04.002
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发表时间：
2018
影响因子：
1.4
通讯作者：
Akihiko Machida
中科院分区：
文献类型：
--
作者：
Yusaku Takubo;Hidenori Terasaki;Tadashi Kondo;Shingo Mitai;Seiji Kamada;Takumi Kikegawa;Akihiko Machida
利用x射线吸收成像技术结合外部加热的金刚石砧细胞，开发了一种高压高温下的密度测量技术。在3.2 ~ 18.6 GPa和294 ~ 719 K的压力和温度范围内测量了固体和液体In的密度。x射线吸收成像法所得密度与x射线衍射法所得密度吻合较好（差值小于2.0%）。根据测量的密度，假设K′= 4 ~ 6，在500 K时，固体In的等温体积模量为48.0±1.1 ~ 40.9±0.8 GPa。在较高压力下，液态In的压缩曲线接近固体In的压缩曲线，在测量范围内不跨越固体In的压缩曲线。目前的技术使我们能够在很宽的压力和温度范围内精确地测定固体和液体的密度。
A technique for density measurement under high pressure and high temperature was developed using the X-ray absorption imaging method combined with an externally heated diamond anvil cell. The densities of solid and liquid In were measured in the pressure and temperature ranges of 3.2–18.6 GPa and 294–719 K. The densities obtained through the X-ray absorption imaging method were in good agreement (less than 2.0% difference) with those obtained through X-ray diffraction. Based on the measured density, the isothermal bulk modulus of solid In is determined as 48.0±1.1− 40.9±0.8 GPa at 500 K, assuming K′= 4 to 6. The compression curve of liquid In approaches that of solid In at higher pressures and does not cross over the solid compression curve in the measurement range. The present technique enables us to determine the densities of both solids and liquids precisely in a wide pressure and temperature range.