金和铂的室温等温物态方程及其压标的意义

金柯; 吴强; 李欣竹; 蔡灵仓; 经福谦

doi:10.11858/gywlxb.2009.03.004

金和铂的室温等温物态方程及其压标的意义

doi: 10.11858/gywlxb.2009.03.004

中国工程物理研究院流体物理研究所，冲击波物理与爆轰物理国防科技重点实验室，四川绵阳 621900

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金柯

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出版历程
- 收稿日期: 2008-07-02
- 修回日期: 2008-10-21
- 发布日期: 2009-06-15

Isothermal Equations of State of Au and Pt at Room Temperature: Implication for Pressure Scales

National Key Laboratory of Shock Wave and Detonation Physics, Institute of Fluid Physics, CAEP, Mianyang 621900, China

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Corresponding author: JIN Ke

摘要

摘要: 在对Grneisen系数高温高压特性不作任何假设的前提下，由冲击雨贡纽数据直接确定了材料零温零压体积、等温体模量及其对压力的一阶偏导。基于上述参数，计算了两种常用压标材料金和铂压缩比至0.5~0.6的0 K物态方程，并通过相应的热压修正得到了金和铂的室温等温物态方程。计算结果与准静水压条件下静高压实验结果具有非常好的吻合性，缩小了早期不同金和铂压标之间的差异。独立来源实验数据和理论计算结果的交叉检验表明，金和铂的室温等温物态方程计算结果可以用于今后静高压实验的压标。
- 等温物态方程 /
- 金 /
- 铂 /
- 压标
Abstract: Isothermal equations of state at room temperature of Au, Pt were investigated to the relative volume change of 0.5~0.6. The isothermal bulk modulus B0 K, its first pressure derivative B0 K, and the specific volume v0 K at zero pressure and temperature were derived directly from the experimental shock wave data with a simple method, independent of any assumption on the behavior of Grneisen parameter at high pressures and temperatures. Based on the derived parameters, the isothermal equations of state for the four pressure standard materials were calculated, which show excellent agreements with the available quasi hydrostatic measurements in diamond-anvil-cell experiment. Comparison of the calculated results with the previous theoretical investigations was also performed. The crosscheck on independent data and the excellent agreements with experimental data confirm that the present isothermal equations of state for Au and Pt can be used as high-pressure scales for future static DAC experiments.
- isothermal equation of state /
- Au /
- Pt /
- pressure scales

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参考文献(41)

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