主 办：bt365官网亚洲版
安全与防护协同创新中心
报告题目：Development of 100 GPa Shock Chemistry
报告人：Prof. Toshimori Sekine
Center for High Pressure Science and Technology Advanced Research (Shanghai)
报告时间：2017年6月13日上午10:00
报告地点：bt365官网亚洲版二层会议室
个人简介：
Toshimori Sekine is a visiting scholar of Center for High Pressure Science and Technology Advanced Research (HPSTAR) and a retired professor of the Department of Earth and Planetary Systems Science, Hiroshima University. He is currently interested in the interactions between shock wave and materials for versatile applications to Earth and planetary science and materials science, as well as impact-origin of life-related biomolecules. He is a Fellow of the American Physical Society. He worked at two US Universities and two Australian Universities, and National Institute for Materials Science (former NIRIM) where he established an excellent shock wave lab in Tsukuba. He has advised post-docs and PhD students, and will continue to be adviser in a wide range of high pressure science and technology for versatile applications including Earth and Planetary Science and Materials Science using dynamic high pressures.
报告摘要：
The shock compression generates very unique circumstances in materials that are not available by the other methods. It is important to control and utilize them for material synthesis, but there is currently a technical limit for sample recovery from shock pressures over several tens GPa. We will try to develop sample recovery techniques by reducing sample space and using multiple ring supports and back-up plates in order to increase shock pressures for recoverable samples. By developing 100 GPa shock chemistry, we aim at shock synthesis and modification of various materials including AX2, ABX3,A2B2X7 and AB2X4where A and B are cations and X is anions respectively. These compounds display a series of high pressure phase transitions and some new materials are expected to form at high shock pressures. In general, high-pressure phases have stronger bonds than those at low pressures and we will have a chance to explore novel hard materials. Considering the stability field based on the crystallographic requirements for each structure, we can select proper starting materials for100 GPa shock chemistry. At the same time, we pay attention to shock chemistry for powders which has been known to enhance heterogeneous shock energy deposition. In that case it is important to analyze post shock samples by micro-analysis methods such as analytical transmission electron microscopy and micro Raman spectroscopy as well as bulk analysis such as powder x-ray diffraction method. It is also necessary to optimize the shock conditions for high yield of such high-pressure phases. When we obtain enough amounts of new phases, we investigate their properties for potential applications.
This seminar will introduce our proposal of a new research project “Development of100 GPa Shock Chemistry” and draw your attention to participate in it.
