This paper describes the experimental setup for determination of mass concentration and mass extinction coefficient for four pyrotechnic smoke compositions using IR spectro-radiometer, and mixed cellulose ester filters (MCE). The smoke compositions are based on hexachloroethane. The morphology of aerosols generated from some pyrotechnic smoke compositions was studied using scanning electron microscope (SEM). Results obtained indicates that smoke compositions capable of producing carbon particles produce higher mass extinction coefficient and are more effective in attenuating radiation, as compared to smoke compositions producing large amount of inorganic particles. The mechanism of action of IR (10.6 #mu#m) attenuation by carbon generation pyrotechnic smoke composition has been explained in the light of information reported in the literature and results of the present study.
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