光谱法研究膨胀石墨红外波段复折射率  

Complex Refraction Indices of Expanded Graphite Deduced from Its Reflection Spectra in Infrared Band

作　　者：豆正伟[1] 李晓霞[1] 赵纪金[1] 

机构地区：[1]解放军电子工程学院脉冲功率激光技术国家重点实验室,安徽省红外与低温等离子体重点实验室,安徽合肥230037

出　　处：《兵工学报》2011年第4期498-502,共5页Acta Armamentarii

摘　　要：具有良好消光性能的膨胀石墨可用作红外/毫米波复合无源干扰材料,复折射率是研究其消光性能的重要参数。采用压片法分别对膨胀石墨压片在0.24～2.6μm和2.5～25μm波段的反射光谱进行了测试。结合所测光谱数据,利用Kramers-Kronig(K-K)关系和Bruggemen有效介质理论对膨胀石墨5～10μm波段的复折射率进行了计算,并作了误差分析。结果表明,利用反射光谱数据计算复折射率的方法是可行的。The expanded graphite（EG） with good extinction performance can be used as electro-optical passive jamming materials,and its complex refractive index is an important parameter for study on its extinction property.The reflection spectra of EG pellet in the 0.24~2.6 μm and 2.5~25 μm waveband were measured respectively.Based on the measured data,the complex refractive index of EG in the wavelength band 5 to 10 μm were calculated by Kramers-Kronig（K-K） relation and Bruggeman effective medium theory,and calculation errors were analyzed.The results indicate that it is practicable to calculate the complex refractive index of EG based on its reflection spectra data.

关 键 词：无机非金属材料 膨胀石墨 复折射率 Kramers-Kronig关系 有效介质理论 

分 类 号：O433.1[机械工程—光学工程]