EVALUATION OF FIREWORKS RESIDUE OBTAINED FROM THE FLASH POWDER CONTAINING ALUMINIUM AND BORONA. AZHAGURAJAN, M.K. MARICHELVAM AND L. PRAKASHAbstract Herein, we report the characteristics of residues obtained after igniting the flash powder mixtureconsisting of varying amounts of Aluminium (Al) and Boron (B) with other energetic materials likepotassium nitrate (KNO3) and sulphur (S). The nature of particulate matter collected aftercombustion was characterized through FESEM-EDX, FTIR, STA (TGA/DSC) and ICP spectrometer.FTIR spectra analysis reveals about the presence of various metal oxides, K2S and K2SO4. Onreplacing aluminum by boron, more alkaline K2S present in the residue was converted into theneutral K2SO4. FESEM with EDX confirm the presence of the elements like Al, B, K, S, O, etc., andthe size of the particles formed after combustion is about 400 nm. The gradual replacement ofaluminum by boron is substantiated from the analysis of residue through ICP Spectrometer. Boronblended fireworks mixture on ignition produces excellent performances and the residuesgenerated do not have any hazardous nature. |