液氮冲击压缩特性及其分子离解相变研究  

Study for Shock-compression Properties and Dissociative Phase Transition of Liquid Nitrogen

作　　者：施尚春[1] 董石[1] 孟川民[1] 焦荣珍[2] 孙悦[2] 杨向东[2] 

机构地区：[1]中国工程物理研究院流体物理研究所冲击波物理与爆轰物理实验室,四川绵阳621900 [2]四川大学高温高压物理研究所,四川成都610065

出　　处：《爆炸与冲击》2002年第4期347-352,共6页Explosion and Shock Waves

摘　　要：利用液氮制冷技术制取液氮样品 ,以二级轻气炮为加载工具 ,对液氮样品进行平面冲击压缩 ,实验测量了液氮 10～ 6 0GPa一次冲击Hugoniot数据。实验结果显示 ,33GPa以上氮的冲击波速度 -粒子速度关系式与低压段有明显差别 ,表现为氮的压缩系数增大。经理论计算和分析 ,可以认为液氮在冲击压力 33GPa以上 ,液氮体系会发生分子离解相变。Shock compression properties were measured for liquid nitrogen compressed dynamically to pressure of 10～60GPa by employing the two stage light gas gun. The data show a continuous phase transition above 33GPa shock pressure, as indicated previously by shock wave experiments. A theoretical model has been derived to examine experimental data by inducing molecular dissociative fraction. According to theoretical and experimental results the phase transition was considered as molecular dissociative phase transition

关 键 词：液氮 冲击压缩 离解相变 实验原理 压缩系数 

分 类 号：O613.61[理学—无机化学] O347[理学—化学]