The temperature-pressure-volume equation of state of platinum
The temperature-pressure-volume equation of state of platinum
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DOI：
10.1063/1.3054331
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发表时间：
2008-12
影响因子：
3.2
通讯作者：
M. Matsui;E. Ito;T. Katsura;D. Yamazaki;T. Yoshino;A. Yokoyama;K. Funakoshi
中科院分区：
文献类型：
--
作者：
M. Matsui;E. Ito;T. Katsura;D. Yamazaki;T. Yoshino;A. Yokoyama;K. Funakoshi
高温高压状态方程（EOSs）的Pt已开发使用测量的冲击压缩数据高达290 GPa和体积热膨胀数据之间的100和近2000 K和0 GPa。基于Mie-Gruneisen关系，结合Debye热模型和Vinet等温状态方程，估算了高温下的晶格热压力。在高温下的电子热压力的贡献也包括在这里。Pt的最佳状态方程参数为：K 0 T =273 GPa，K 0 T ′=5.20，γ0=2.70，q=1.10，Θ0=230 K，其中下标0为环境条件。利用同步辐射粉末X射线衍射实验，结合Kawai型多砧高压装置和烧结金刚石砧，测量了Pt在1600 K和42 GPa下的温度-压力-体积（T-P-V）数据。我们发现，新发展的Pt的T-P-V状态方程不仅与290 GPa以下的冲击压缩数据和体热数据完全一致，而且与其它实验数据也完全一致。
High-temperature and high-pressure equations of state (EOSs) of Pt have been developed using measured shock compression data up to 290 GPa and volume thermal expansion data between 100 and nearly 2000 K and 0 GPa. The lattice thermal pressures at high temperatures have been estimated based on the Mie–Gruneisen relation with the Debye thermal model and the Vinet isothermal EOS. The contribution of electronic thermal pressure at high temperatures has also been included here. The optimized EOS parameters of Pt are K0T=273 GPa, K0T′=5.20, γ0=2.70, and q=1.10 with Θ0=230 K, where the subscript 0 refers to the ambient conditions. The temperature-pressure-volume (T-P-V) data of Pt have also been measured up to 1600 K and 42 GPa, using synchrotron powder x-ray diffraction experiments combined with a Kawai-type multianvil high pressure apparatus and sintered diamond anvils. We find that the newly developed T-P-V EOS of Pt is fully consistent with not only the shock compression data up to 290 GPa and volume thermal...