非简谐振动对固体物态方程的影响

应用热力学理论建立了固体格林乃森物态方程 ,在对格林乃森参量进行热力学分析基础上 ,考虑到原子振动的非简谐效应 ,对金属、惰性元素晶体、离子晶体的格林乃森参量作定量计算 ,并与实验结果比较 ;最后应用索末菲自由电子理论 ,计算了自由电子对金属材料压强的修正 .结果表明 :只有考虑到原子振动的非简谐效应 ,才能得到与实验较为一致的结果 ;固体物态方程取决于固体的结构和原子相互作用势的具体形式 .

Effect of anharmonic vibration on the solid equation of state

The Grüneisen equation is derived by using the therodynamics. The Grüneisen parameters for metals, inert element crystals, and ionic crystals are calculated by considering the effects of anharmonic vibration of atoms, and the oblained results are compared with the experimental by applying Sommerfeld electric theory. The oblained results indicate that the anhamonic effects is a necessary integrient to obtain the agreeable results with the experimental results, and the solid equation of state is determined by the solid structure and the potential between atoms.