【摘要】 研究了 16种离子型固体在室温到熔点之间的体积热膨胀系数、体积模量和原子间距 .根据温度高于Debye温度时 ,Anderson -Gr櫣ｎｅｉｓｅｎ参量与温度无关的近似 ,得到α(T)、BT(T)和r(T)的函数式以及一个唯象态方程 .计算结果与实验数据一致 .更多还原

【Abstract】 The temperature dependence of the volume thermal expansion coefficient, bulk modulus B T(T) and interatomic separation r(T) are investigated from room temperature up to melting temperature for sixteen ionic solids. In present paper, the relations for B T(T) and r(T) are developed with the approximations that the Anderson-Grüneisen parameter(δ T) is independent of temperature(T) when T is higher than the Debye temperature(Θ D). A phenomenological equation of state is also obtained. These relations can be used to predict the values of B T(T) and r(T) at different temperatures. The results are compared with available experimental data and are discussed in view of recent research in the field of high temperature physics. A very good agreement between theory and experiment suggests the validity of the present work.更多还原