摘要
以共价N─N单键结合的三维网状聚合氮(cg-N)是一种理想的高能量密度材料。在室温下将分子态氮加压至135.6GPa,观测到了氮的一系列"固体分子态-固体分子态"转变(β-δ-ε-ζ-η);且在不引入任何激光吸收材料的情况下,直接对红色的非晶η氮进行双面金刚石压砧激光加热,在133.9GPa、2 000K的条件下成功地合成出透明cg-N,并测量得到cg-N在134GPa附近拉曼A模频率对压力的变化率为1.56cm^(-1)/GPa。
Three-dimensional polymetric cubic gauche nitrogen(cg-N)combined with covalent N─N single bonds is an ideal high energy density material(HEDM).A series of solid molecular state-to-solid molecular state transitions(β-δ-ε-ζ-η)in nitrogen were observed in experiment upon pressurizing the molecular nitrogen up to 135.6 GPa in ambient condition.Under 133.9 GPa and at 2 000 K,the transparent cg-N was successfully synthesized using the double-side laser heating diamond-anvil cell(LHDAC)without any laser absorbing material.In addition,the pressure coefficient of the Raman A mode for cg-N is 1.56 cm-1/GPa at about 134 GPa.
出处
《高压物理学报》
EI
CAS
CSCD
北大核心
2018年第2期13-17,共5页
Chinese Journal of High Pressure Physics
基金
四川大学优秀青年学者自然科学基金(2015SCU04A04)
国家自然科学基金(11774247
21301122)
关键词
聚合氮
高能量密度材料(HEDM)
高温高压
拉曼散射
激光加热金刚石压砧
polymeric nitrogen
high energy density material(HEDM)
high pressure and high temperature
Raman scattering
laser heating diamond-anvil cell(LHDAC)