Study on Shock Compression of Liquids Nitrogen and Carbon Monoxide

Dynamic equation-of-state for liquids N2 and CO were measured in the shock pressure range of 10～57 GPa, using a two-stage light-gas gun. The liquids were shocked from initial states near their saturation curves at 77.6 K that their densities are about 0.808 g/cm3 and 0.807 g/cm3 for N2 and CO, respectively. The Hugoniot data of liquid N2 and CO are obtained. These results show that nitrogen has been dissociated in shock pressure above 30 GPa. And, the carbon monoxide has a chemically non-reactive compressive process in shock pressure below 20 GPa, but it has a chemically reactive complicated process in up to pressure 20 GPa. In addition, both liquids N2 and CO have the similar shock compression characteristics below 20 GPa.