Theoretical study of phonon density of states, thermodynamic properties and phase transitions for HMX

摘要: We develop a physical model to describe the phonon density of states for octahydro-1,3,5,7-tetranitro-1,3,5,7-tetrazocine (HMX) and use it calculate set thermodynamic properties, such as thermal expansion coefficient, bulk modulus, specific heat Hugoniot curve. The results are in good agreement with available experiments at low pressure provide reasonable prediction high lack experiments. Two types phase transitions compared: static transition shock-induced transition. determine that curves two mechanisms quite different. induce an HMX by shock loading is larger than under condition.