摘要
利用多通道光学高温计测量了溴仿在３７ＧＰａ到８５ＧＰａ压力范围内的温度，并观察了溴仿／单晶氯化钠界面的热驰豫过程。结果发现，当冲击波压力升高到４６ＧＰａ时，溴仿的光辐射强度随时间的变化呈现出“双阶梯”或“双台阶”形状的剖面结构，且台阶之间的时间间隔随冲击压力的增高而减小。当压力达到８５ＧＰａ时，上述“双台阶”结构消失，呈现为普通的单台阶剖面结构。冲击波温度测量表明，当压力低于５０ＧＰａ时，实测温度与Ｇｏｋｕｌｙａ报道的数据一致；当压力增至７６ＧＰａ以上时，冲击波温度出现突跃性增加。结合对溴仿／氯化钠界面上的热驰豫过程的分析，文中提出。
Multi channel optic pyrometer was used to observe shock temperatures of bromoform in the pressure range from 37 to 85 GPa and thermal relaxation behavior at bromoform/sodium chloride crystal interface.The radiation time histories from shocked bromoform exhibit a “two step” structure as the pressure reaches 46 GPa or higher,which return to the usual “one step” profile as the pressure goes up to 85 GPa.The observed shock temperatures agree well with the reported data at pressures less than 50 GPa;at pressures higher than 76 GPa,it increases abruptly.Based on the above results and the thermal relaxation behavior at CHBr 3/NaCl interface,we proposed a time delayed exothermal chemical reaction model to describe the shock compression process occuring in bromoform under shock pressure from 46 to 85 GPa.
出处
《高压物理学报》
EI
CAS
CSCD
北大核心
1996年第3期220-226,共7页
Chinese Journal of High Pressure Physics
基金
中国工程物理研究院科学技术基金
关键词
冲击波温度
界面热驰豫
光分析器
溴仿
shock temperature,thermal relaxation at the material interface,optic analyzer,bromoform,optic pyrometer.
