Abstract: The study of the behavior of oxides in particular calcium oxide un- der high pressures and temperatures is of great interest in various elds of condensed matter physics, including geophysics [1]. This research presents the results of modeling the shock wave loading of calcium oxide up to pressures of 100 GPa, taking into account phase transitions. The sample is considered as a mixture of low-pressure and high-pressure phase's in the eld of polymorphic phase transition. The model used for calculations assumes that the components of the material are in thermodynamic equilibrium during shock wave loading [2, 3]. An equation of state for the low-pressure phase B1 is obtained up to 50 GPa with an isothermal modulus of elasticity of K0 = 42.8 GPa and its derivative in pressure of K0' = 5.6. An equation of state for the high-pressure phase B2 is also obtained from 50 GPa, with K0 of 389.9 GPa and K0' of 3 These results are veri ed using experimental data obtained from dynamic experiments and the calculations of other researchers.

Cite: Maevskii K.
Modeling of shock wave loading of calcium oxide
XL Fortov International Conference on Interaction of Intense Energy Fluxes with Matter 01-06 Mar 2025