Behaviour of Grüneisen Parameter at High Pressure and Temperature Inferred from Shock Compression Data

作     者：吴强 经福谦 等 

作者机构：LaboratoryforShockWaveandDetonationPhysicsResearchInstituteofFluidPhysicsChinaAcademyofEngineeringPhysicsP.O.Box919Mianyang621900 LaboratoryforShockWaveandDetonationPhysicsResearchInstituteofFlui 

出 版 物：《Chinese Physics Letters》 (中国物理快报（英文版）)

年 卷 期：2002年第19卷第4期

页      面：528-530页

核心收录：

学科分类：07[理学] 0809[工学-电子科学与技术（可授工学、理学学位）] 070205[理学-凝聚态物理] 08[工学] 0805[工学-材料科学与工程（可授工学、理学学位）] 080502[工学-材料学] 0704[理学-天文学] 0702[理学-物理学] 

基　　金：国家自然科学基金 

主　　题：Data compression 

摘      要：A new method is proposed to calculate the Grüneisen parameter directly from the experimental Hugoniot data, without any assumption on the lattice vibrational mode of the material being studied. Compared with the results calculated by the methods proposed previously, the values of the Grüneisen parameter calculated have three distinguishable features that support the rationality of the method. A new phenomenon that the lattice vibrational mode changes with the thermodynamic state of the solid has been first observed from the calculated results, which implies that the material parameter g, characterizing the lattice vibrational mode, is material dependent rather than a material constant.