遥感FTIR测定固体推进剂燃烧的红外光谱特性

应用高分辨率的Bruker EQUINOX55型遥感FTIR，对含有大量高氯酸铵和聚四氟乙烯的高红外活性的固体推进剂燃烧火焰的红外光谱特性进行了研究。设定遥感FTIR光谱仪的光谱分辨率为4 cm-1，连续实时地收集燃烧进行到0，9，18，27和36 s时火焰的红外发射光谱图。采用分子转振光谱测温法，实时测定了固体推进剂的燃烧温度，测得的温度分别为1 992.5，2 610.9，2 294.4，2 361.1和1 916.9 K，校正了仪器的响应函数，得到了固体推进剂燃烧火焰的绝对光谱能量分布图，以及在不同时刻燃烧产物HCl，HF，CO₂和CO的实时浓度。研究结果表明，遥感FTIR可以用于研究特种红外源的红外光谱特性，特别是用于军事上红外目标识辨和制导与反制导，以及研究和改进固体推进剂的配方，是一种很有潜力的技术。

Studies on Spectral Characteristics of Solid Propellant by Remote Sensing FTIR

The infrared spectral characteristics of high-intensity IR solid propellant were measured in this paper using a Bruker EQUINOX55 remote sensing FTIR spectrometer. The emission spectra of the combustion flame were recorded in the range of 4 700-1 800 cm~-1 with a spectral resolution of 4 cm~-1 . The combustion temperatures of solid propellant at the burning time of 0, 9, 18, 27 and ~36 s calculated from the molecular rotation-vibration spectra were 1 992.5, 1 610.9, 2 294.4, 2 361.1 and 1 916.9 K, respectively. Moreover, the spectral radiance distributions of the high IR flare material at different times were given, and the combustion product concentrations of HCl, HF, CO_2 and CO were determined quantitatively. Results showed that remote sensing FTIR is a potential technology that can be applied to the measurement of IR spectral characteristics, especially to the identification of the IR objects, guidance and anti-guidance in the military, and the modification of the make-up of solid propellant.