摘要
提出一种能精确考虑固体结合能的通用状态方程,并且在高压和膨胀区域都具有正确的行为,不会出现物理上不正确的振荡现象.将新方程与文献中的典型方程应用于15种碱金属卤化物和一种碱土金属氧化物,结果表明新方程在给出正确结合能数据的同时,能够很好地拟合实验压缩数据.由Vinet方程和Morse方程定出的参数随数据范围变化很明显,新方程定出的参数随数据范围变化不明显.新方程的通用性优于Vinet方程和Morse方程.
A universal equation of state for solids is proposed. The equation exactly accounts for the cohesive energy; n physically incorrect oscillations exists,and its action is correct in both high pressure and expanded regions. The new equation and several typical equations in literature are applied to 15 alkali halide solids,and one alkaline earth oxide. Th results show that the new equation can well fit experimental data,and can give correct cohesive energy. The parameter determined from the Vinet and Morse equations are sensitive to the data range,whereas the new equation is not. Thi implies that the applicability of new equation is better than the Vinet and Morse equations.
出处
《物理学报》
SCIE
EI
CAS
CSCD
北大核心
2010年第5期3384-3393,共10页
Acta Physica Sinica
基金
国家自然科学基金与中国工程物理研究院联合基金(批准号:10876008)资助的课题~~
关键词
固体
通用状态方程
结合能
碱金属卤化物
solid
universal equation of state
cohesive energy
alkali halide
