P-V-T equation of state of platinum to 80GPa and 1900K from internal resistive heating/x-ray diffraction measurements
P-V-T equation of state of platinum to 80GPa and 1900K from internal resistive heating/x-ray diffraction measurements
复制标题
DOI：
10.1063/1.2844358
复制
发表时间：
2008-03
影响因子：
3.2
通讯作者：
C. Zha;K. Mibe;W. Bassett;O. Tschauner;H. Mao;R. Hemley
中科院分区：
文献类型：
--
作者：
C. Zha;K. Mibe;W. Bassett;O. Tschauner;H. Mao;R. Hemley
使用改进的内部电阻加热技术和金刚石砧池，通过对 Pt 和 MgO 混合物进行原位 X 射线衍射，将 Pt 的 P-V-T 状态方程 (EOS) 确定为 80GPa 和 1900K。室温下Pt的三阶Birch-Murnaghan EOS可拟合为K0=273.5±2.0GPa，K0′=4.70±0.06，V0=60.38A3。高温数据已使用热力学和 Mie-Gruneisen-Debye 方法进行热 EOS 反演。结果是自洽的，并且与数据重叠的多砧装置获得的结果非常一致。 MgO 被视为标准，因为它的热 EOS 已得到很好的建立并基于大量的实验和理论数据，并且因为室温下的 EOS 是通过完全独立于其他方法的任何假设或测量的主要方法确定的。通过使用 Re 垫圈取代原来的 G...，对以前的内部电阻加热方法进行了改进。
The P-V-T equation of state (EOS) of Pt has been determined to 80GPa and 1900K by in situ x-ray diffraction of a mixture of Pt and MgO using a modified internal resistive heating technique with a diamond anvil cell. The third-order Birch–Murnaghan EOS of Pt at room temperature can be fitted with K0=273.5±2.0GPa, K0′=4.70±0.06, with V0=60.38A3. High temperature data have been treated with both thermodynamic and Mie–Gruneisen-Debye methods for the thermal EOS inversion. The results are self-consistent and in excellent agreement with those obtained by the multianvil apparatus where the data overlap. MgO is taken as the standard because its thermal EOS is well established and based on a wealth of experimental and theoretical data, and because the EOS at room temperature has been determined by a primary method that is completely independent of any assumptions or measurements by other methods. Improvements to previous internal resistive heating methods were made by using a Re gasket that replaces the original g...