引用本文:
刘庚冉, 黄顺祥, 胡非, 陈海平, 曹保榆, 王玄玉. 红磷烟幕的红外消光作用[J]. 应用化学,
2005, 22(7): 709-714.
Citation: LIU Geng-Ran, HUANG Shun-Xiang, HU Fei, CHEN Hai-Ping, CAO Bao-Yu, WANG Xuan-Yu. IR Extinction Effect of Red Phosphorous Smoke Screen[J]. Chinese Journal of Applied Chemistry, 2005, 22(7): 709-714.
Citation: LIU Geng-Ran, HUANG Shun-Xiang, HU Fei, CHEN Hai-Ping, CAO Bao-Yu, WANG Xuan-Yu. IR Extinction Effect of Red Phosphorous Smoke Screen[J]. Chinese Journal of Applied Chemistry, 2005, 22(7): 709-714.
红磷烟幕的红外消光作用
摘要:
使用中等烟箱、热像仪和FTIR光谱仪等测定了红磷烟幕的遮蔽质量和消光系数。当目标被完全遮蔽时,遮蔽质量为3.58 g/m2。在温度23℃,相对湿度为60%时,3~5 μm范围消光系数为0.14 m2/g,8~14 μm范围消光系数为0.078 m2/g。根据Mie理论精确计算了红磷烟幕的消光效率因子,实验值和理论值在8~12 μm波段有较好的一致性。分析了影响烟幕消光作用的主要因素:烟幕持续时间、粒子大小及磷烟的电导率等。烟幕释放前期的消光系数有增加的趋势。随着时间的增加,由于小颗粒的沉降和凝聚,其消光效率明显下降。通过综合比较得出,红磷烟幕的最佳消光粒径为2.5 μm。磷酸的电导率较小,辐射对其穿透深度很大,而反射很小,消光能力主要以吸收作用为主。
English
IR Extinction Effect of Red Phosphorous Smoke Screen
Abstract:
A medium-scale smoke chamber,a thermal image formation analyzer and a Fourier transform infrared spectrometer etc.were used to measure the camouflaging mass and extinction coefficient of red phosphorous smoke screen.When the target was covered completely,the camouflaging mass was 3.58 g/m2.The extinction coefficient was 0.14 m2/g in the range of 3~5 μm or 0.078 m2/g in the range of 8~12 μm at 23℃ and relative humidity 60%.According to the Mie scattering theory,the extinction efficiency of red phosphorous smoke screen was calculated.By comparing the result of the theoretical data with the result of the experiment,it is shown that the two kinds of results are rather analogical in the wave band form 8 to 12 μm.The extinction of particle (2.5 μm) is worked out via analyzing key extinction factors,such as time,particle size and conductance.At the beginning of smoke screen is released,the extinction coefficient is increased.With the time going on,it falls down fast because of the sedimentation and cohesion of the small grains.The conductance of RP is little.The deepness of radiation is great while the reflection of radiation is small.So,the main extinction ability of RP is absorption.
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Key words:
- Infrared
- / smoke screen
- / extinction coefficient
- / red phosphorous
- / absorption
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