| 高压下碱卤晶体的三参量等温状态方程 |
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| 引用本文： | 严祖同.高压下碱卤晶体的三参量等温状态方程[J].高压物理学报,2006,20(1):51-55. |
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| 作者姓名： | 严祖同 |
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| 作者单位： | 安徽师范大学物理与电子信息学院,安徽芜湖,241000 |
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| 基金项目： | 安徽省省级重点学科基金项目(20022DXK)，安徽省教育厅自然科学基金(2001KJ110) |
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| 摘 要： | 由等温体积弹性模量的定义及其与压强关系的假设出发，导出了一个新的适用于高压下碱卤晶体的三参量等温状态方程。计算了室温下NaCl晶体在0～30 GPa压强范围内、CsCl晶体在0～40 GPa压强范围内的相对体积以及NaCl晶体在0～30 GPa压强范围内的等温体积弹性模量，计算结果与实验值一致。对等温体积弹性模量及其对压强的一阶、二阶导数与压强的关系进行了讨论，指出压强趋于无穷大时的等温体积弹性模量是常数。
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| 关 键 词： | 状态方程 等温体积弹性模量 NaCl晶体 CsCl晶体 高压 |
| 文章编号： | 1000-5773（2006）01-0051-05 |
| 收稿时间： | 2004-10-21 |
| 修稿时间： | 2004-11-19 |
An Isothermal Three-Parameter Equation of State Applied to Alkali Halide Crystals under High Pressures |
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| YAN Zu-Tong.An Isothermal Three-Parameter Equation of State Applied to Alkali Halide Crystals under High Pressures[J].Chinese Journal of High Pressure Physics,2006,20(1):51-55. |
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| Authors: | YAN Zu-Tong |
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| Institution: | College of Physics and Electronic Information ,Anhui Normal University ,Wuhu 241000,China |
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| Abstract: | From the definition of isothermal bulk modulus and an assumption of its relationship with the pressure, an isothermal three-parameter equation of state has been proposed, which is found to be applicable at high pressure. The proposed equation of state has been used to compute the pressure-volume behavior of NaCl crystal in the pressure range 0~30 GPa and CsCl crystal in the pressure range 0~40 GPa. The isothermal bulk modulus in the pressure range 0~30 GPa of NaCl crystal were also calculated. The results are in very good agreement with the experimental data. The pressure dependence of the isothermal bulk modulus BT and its first- and second-order pressure derivative are discussed, and the bulk modulus increases continuously with the increasing pressure and has a finite value as p→∞. |
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| Keywords: | isothermal equation of state isothermal bulk modulus NaCl crystal CsCl crystal high pressure |
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