复合微球型气溶胶对红外的消光

摘要

The mass attenuation coefficient of the composite spheres of Cu-coated spheres covered with graphite is compared with that of the mixture of the Cu-coated spheres and graphite particles in infrared. The results show that the mass attenuation coefficient of the former is bigger than that of the latter in a range. It is also bigger than that of the Cu-coated spheres or graphite spheres. The optimal median diameter of the sphere is found to be about one third of the wave length to be interfered in infrared waveband.%对复合镀金属微球的红外消光特性进行了数值计算,结果表明,当壳层厚度小于某一值时,对数正态分布下的双层壳复合微球,在最佳中径附近范围内时的质量消光系数大于单层壳微球,也大于由单层壳微球与双层壳复合微球的外层壳材料混合的微球;随着内壳h或外壳H的增加,上述粒径范围变窄,而随着波长λ的增加该范围变宽.微球的最佳中径等于波长的三分之一左右.