p-V relationship for BaCuO_2.5 at room temperature and in the pressure range up to 4.5 GPa was obtained using a piston-cylinder type device. Its equation of state, Grüneisen parameter γ₀, bulk modulus B₀, and the first order pressure derivative of B₀ were also acquired. The resistance versus pressure (R-p), and capacitance versus pressure (C-p) relationships up to 20 GPa were simultaneously studied using DAC at room temperature. The results showed that no phase transition occurred under pressure up to 20 GPa.

With the pre-determined density of specimen, the elastic velocity can be solved by the shape fitting of the predicted transmission wave with the measured transmission wave in the initial stage, and then the delay-time in SHPB data processing can be determined.

Using Pulse-Echo Overlap Method, the velocities of longitudinal and shear waves of Ceramic MgCNi₃ superconductor were measured up to hydrostatic pressure of 0.5 GPa. The bulk modulus B, shear modulus G, Debye temperature and specific heat under pressure were calculated. The values of Debye temperature Θ_D and specific heat c_V under ambient condition are 454.82 K and 111.30 J/(mol·K), respectively. The B-p curve was fitted linearly to obtain , the first order derivative of bulk modulus at zero pressure. The Murnaghan equation of state was established.

A novel method using four electrodes perpendicular to shock front was proposed to measure the electrical conductivity of metals under shock compression up to megabar pressures. Using the drilled sapphire disk as insulator can eliminate the shunting effect, which will result in a higher conductivity data. The electrical conductivities of iron under shock compression in the final equilibrium pressures ranging from 101 to 208 GPa were obtained by using the two-stage light gas gun techniques. The measured conductivity of iron varies from 1.45×10⁶ S/m at 101 GPa and 2010 K, to 7.65×10⁵ S/m at 208 GPa and 5220 K, which first extend the electrical conductivity measurements of iron to pressures beyond 200 GPa. The experimental results indicate that the Bloch-Grüneisen equation describing the high-pressure electrical conductivity of metals still holds true up to 200 GPa for ε-Fe (hcp structure).

The characteristics of the CH₄-CO₂-H₂O fluid at high temperature were studied by Raman spectroscopy. The results show that the Raman spectra of CH₄ and CO₂ do not influence each other, but they are both affected by H₂O at high temperature. The hydrogen bonding of water decreases linearly before it becomes homogenous under isochoric condition. As the fluid becomes a homogenous gas, the Raman spectroscopy has little change with temperature. The hydrogen bonding of water, however, still remains in the homogenous liquid, even at the highest temperature of 520 ℃ in experiment. For the homogenous fluid at the highest temperature of 580 ℃ during measurement, the hydrogen bonding of liquid water remains relatively stronger.

According to the assumption that porous iron sample has transformed to homogeneous medium under a given shock pressure, a Morse-type potential is used to simulate Hugoniot curve and shock temperatures of porous iron by MD method. The Morse potential has three adjustable parameters, which are determined from experimental data of iron's thermo-elastic properties by Matsui and Anderson. The simulation results are in good agreement with thermodynamic data for porous iron with a porosity of 12.1%, which implies that porous sample of a given porosity has a thermodynamic equilibrium temperature under a given shock pressure. However, whether the conclusion could be applicable to porous samples with larger porosities needs to be further verified by experiments.

We applied re-initialized level set method for enforcing level set function to preserve distancing character. Level set equation and fluid dynamic Euler equations were solved independently. Multi-fluid wave propagation method for fluid dynamic Euler equations and fifth order WENO scheme for re-initialization level set equation were used. Some comparable results for 2D compressible multi-fluid interface problems are given.

In this paper, the Young's modulus and Poisson ratio of an alumina ceramic were determined by quasi-static experiments. The relationship between shock wave and particle velocity was obtained by measuring the shock wave and flying plate velocities with refer to 1-D plate impact tests. The longitudinal and lateral manganin gauges were used to determine the principal stresses in the shocked specimens, the lateral stress and longitudinal stress were measured in the 3~11 GPa range of shock stresses. Moreover, the shear strengths of the ceramic were determined from the difference between the longitudinal and lateral stresses.

The equations of hydrodynamics including conduction of heat are solved numerically by using the finite element method. The heat flow is calculated according to the Fourier's heat conduction. The temperature on the contact side of elements is calculated by the continuity condition of heat flow. According to triangular partitions divided from a quadrangle side of body element, convection heat flow is calculated. Considering the isotropic-elastic-plastic-hydrodynamic material model, the equation of state with three contributions, and the correlation between thermal conductivity and temperature, some computational examples, including the Fourier's heat conduction, contact heat transfer, deformation effects of heat, and shock compression of mixture, are given by the finite element code. The numerical simulation of shock temperature of mixture indicates that the temperatures among minute grains fluctuate, and tend to reach a thermal equilibrium during the shock propagation.

The R-p relationship of ZnO nanocrystals and bulk materials were determined by diamond anvil cell (DAC). Research results show that a phase transformation begins at the 7.9 GPa when the particle is 20 nm nanocrystals, whereas the phase transition of ZnO bulk materials at 5 GPa. The smaller particle has larger phase transition pressure, and transformation pressure of bulk materials determined by DAC is lower than that previously reported. The structural properties of ZnO were discussed, and the domain fracture of nanocrystals under pressure was investigated.