The Structural Transition Of Water At Quartz/Water Interfaces Under Shock Compression In Phase Region Of Liquid

Water is always caused much attention of scientists because it is one of substances common in nature. And water plays a important role in a wide range of physical, chemical, biological in nature. Although people has been studied water over the past decades, but so far, many related knowledge of the water has not been master by human. Such as the solidification of water. In recent years, the exploring the structure of water under normal conditions at the interface is a new research. The study helps to reveal the mechanism of water participation in the interface action. But there are small people to study the structure changes of water in the interface, which is due to quite difficult to obtain true information in the shock experiment. So the experimental equipment with high sensitivity diagnostic and highly accurate synchronization techniques are needed. In this thesis, we studied the water freezing under shock compression with a novel technique using light transmission measurements and obtained the following conclusions:(1) Fused quartz can be used as a transparent window in the experiments. We study the fused quartz state under shock compression, in which the velocity of projectile is350meters per second. Fused quartz remains is transparent in the state of shock compression, and it is confirmed in the uninstall process.(2) The phase transition is dependent on the characteristics of quartz in the interface. Water’s structure phase transition is explored in various pH environments in water/quartz interface under shock compression. We demonstrate that phase transition is closely related to the electric field of the quartz interface which induced the solidification of water.(3) It found the complete process of water’s phase transition. The phase transition process was divided into four stages in the interface under single shock compression which is consistent with the theoretical results.(4) The experiments confirmed that high-density water was induced into ice under shock compression. At very low pH, the quartz surface is nearly neutral, but water in the interface can still occur to the phase transition. Because high-density water is a metastable liquid in which phase transition occurs more easily.