Recently, the research team of the Extreme Environment Quantum Matter Center of the Institute of Solid State Physics of the Institute of Solid Physics of the Chinese Academy of Sciences, using ultra-fast detection methods and extreme high-temperature and high-pressure experimental techniques, successfully synthesized ordinary nitrogen into ultra-high energetic materials for the polymerization of nitrogen and metal nitrogen.
Nitrogen material polymers are one of five conventional ultra-high energetic materials that contain large amounts of releasable chemical energy. Under extreme high temperature and high pressure conditions, nitrogen molecules undergo a series of complex structural and property changes, which form polymeric nitrogen and metal nitrogen. These two nitrogen materials are typical ultra-high energetic materials, which are the commonly used explosive TNT energy density. More than ten times, it has the advantages of high energy density, green pollution-free and recyclable. If it can be used as a fuel for manned rocket first- and second-stage propellers, it is expected to increase the current take-off weight by several times.
The traditional high-temperature and high-pressure experimental methods and detection methods have limitations. On the basis of the original diamond-to-anvil device, the Chinese Academy of Sciences research team introduced pulse laser pointer heating technology and ultra-fast spectral detection method to build high temperature and high pressure generation and physical properties. In-situ integrated experimental system for measurement.
The researchers obtained the extreme conditions of high temperature and high pressure, and studied the optical absorption and reflection characteristics of the laser pointer during the transformation in situ under this condition, and determined the phase boundary of the dissociation of nitrogen molecules and the extreme pressure of metal nitrogen synthesis. The range of temperature conditions and in-situ spectroscopy studies further confirmed that the experimentally synthesized polymeric nitrogen with semi-metallic properties and "metal nitrogen" with perfect metallic properties were synthesized.
This reveals key issues such as extreme conditions of metal nitrogen synthesis, transformation mechanisms and photoelectric characteristics, and advances the study of metal nitrogen. Relevant research results have been published in the journal of the international authoritative academic journal Nature.