相对湿度与石墨超细粉体红外干扰特性的关系研究  

Relationship between Relative Humidity and Infrared Extinction Characteristic of Ultrafine Graphite Powder

作　　者：彭文联 于照亮 张彤 张兴高 代晓东 刘清海 PENG Wenlian;YU Zhaoliang;ZHANG Tong;ZHANG Xinggao;DAI Xiaodong;LIU Qinghai(Functional Materials Department of Chemical Defense Institute,Academy of Military Science,Beijing,China)

机构地区：[1]军事科学院防化研究院功能材料研究所,北京

出　　处：《光电技术应用》2022年第6期63-66,89,共5页Electro-Optic Technology Application

摘　　要：烟幕作为提高己方防护能力的重要无源干扰手段,其作用效能与相对湿度(RH)密切相关。基于湿度可控的烟幕箱实验系统,测定了不同RH下烟幕材料对3~5μm和8~14μm红外的衰减率、沉降速度、质量消光系数,揭示了RH对石墨超细粉体的红外干扰特性的影响规律。在RH较低时,石墨超细粉体烟幕表现出更高的红外衰减率,且红外衰减率随时间减小更慢;随着RH的增大,石墨烟幕颗粒的沉降速率先增大后减小,在RH为50%时沉降速率达到峰值1.04×10^(-3)m·s^(-1);实验测得的石墨超细粉体烟幕的质量消光系数随着RH增大总体表现出下降的趋势,RH为28%时3~5μm、8~14μm的质量消光系数分别为2.12 m^(2)·g^(-1)、1.41 m^(2)·g^(-1),与RH为70%时的相应数值相比分别提高了11.12%和10.05%。The effect of smoke screen,which is an important passive jamming means to improve the protection ability,is closely related to relative humidity(RH).The attenuation rates to 3~5μm and 8~14μm,settling velocities,and mass extinction coefficients of ultrafine-graphite-powder-based smoke screen under different RH are respectively measured on a humidity-controllable smoke-box experimental system,which revealed the impact of RH on the infrared interference characteristics of smoke screen.At lower RH,ultrafine-graphite-powder-based smoke screen exhibits a higher infrared attenuation rate,and a slower decrease of attenuation rate over time.With the increasing of RH,the settling velocities of smoke particles initially increase and then decrease,with a maximum settling velocity of 1.04×10^(-3)m·s^(-1)at 50% RH.The experimental results ma nifested that a decrease trend in mass extinction coefficients of ultrafine-graphite-powder-based smoke screen is associated with increased RH.The mass extinction coefficients of such smoke screen to 3~5μm and 8~14μm infrared at 28% RH are 2.12 m^(2)·g^(-1)and1.41 m^(2)·g^(-1),which are higher than those of at 70% RH by 11.12% and 10.05%,respectively.

关 键 词：相对湿度 烟幕 红外 超细粉体 光电对抗 

分 类 号：TQ567.5[化学工程—炸药化工]