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高压下碱卤晶体的三参量等温状态方程

DOI: 10.11858/gywlxb.2006.01.011, PP. 51-55

Keywords: 状态方程,等温体积弹性模量,NaCl晶体,CsCl晶体,高压

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Abstract:

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0~30GPa压强范围内、CsCl晶体在0~40GPa压强范围内的相对体积以及NaCl晶体在0~30GPa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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