冲击状态下仍透明材料的冲击温度测量

SHOCK TEMPERATURE MEASUREMENT OF TRANSPARENT MATERIALS

在对冲击作用下界面热传导特性进行分析的基础上 ,提出了一种在透明材料前加一高发射率特殊填层材料 ,通过其与透明材料的热平衡温度来确定透明材料的冲击温度的测量方法 ,并对氯化钠单晶在 4 1GPa压力下的冲击温度进行了测量。初步实验结果表明 ,用这种方法测量透明材料的冲击温度是可行的。

Under shock compressions,a few special crystal materials have very small absorptance.This means that although they stand in high temperature states on,temperatures can not be detected by using optical radiation techniques because of the low emissivity.In this paper,an optical radiation technique for measuring temperature of very low emissive material under shock compression is proposed based on the analysis of the thermal diffusion at the interface of sample and thin film.To test this technique,temperature of crystal NaCl at shock pressure 41 GPa was measured.The result agrees with the results of Kormer et al.This shows that this technique is feasible and can be used to measure shock temperatures of low emissive materials.