德拜温度不为常数时晶体的热力学函数

确定了晶体的德拜温度随温度变化的普适关系,导出了在此关系下晶体热力学函数的表达式.在此基础上,研究了铟的德拜温度和定压热容量随温度变化的规律.结果表明:理论计算与实验值基本一致.其中,在低温段和高温段理论值与实验值符合得较好,而中间段符合得稍差.

The Crystal's Thermodynamic Function on Condition that Debye Temperature Isn't Constant

That the crystal's Debye temperature varies with the thange of the temperature;under such relation the forms of the crystal's thermodynamic function are obtained; and on the basis of that the Debye temperature of In and the rule of thermal capasity under a certain fixed pressure which changes with the change of the temperature have been studied. The result shows that the theoretical value is nearly the same with that obtained from the experiment. They are nearly consistent with those in low and high temperatures but not so consistent with that in the middle.