Abstract -Nano-sized sulphar and oxidizers were synthesized by the ball mill method and the size was determined using a particle size analyzer. Pyrotechnic mixtures of compositions using five different oxidizers -potassium nitrate, postassium perchorate, barium nitrate, strontium nitrate and bismuth oxide, in different particle sizes, mixed with sulphar, aluminium and boric acid were used to produce sound producing cake-bomb firecrackers for analysis. A bulk density of 0.24-0.68 gm per cubic cm was maintained for homogeneity of the mixture. The sound level from newly formulated sound producing firecracker (cake bombs) showed a linear relationship with the weight of the mixture taken. Decreasing the particle size from micro to nano improves the efficiency of firecrackers using the oxidizes, potassium nitrate, potassium per chlorate but not for barium nitrate, stransium ntirate or bismath nitrate. The analysis of safety characteristic data of thermal and mechanical sensitiveness indicates that the pyrotechnic mixture using the oxidizer potassium perchlorate is highly sensitive to friction and impact. The limiting impact energy (LIE) of pyrotechnic compositions falls in the rate of 2.55-4.55 Jule. LIE of nano materials was less compared to micro materials indicating tht as the particle size decreases, the mixture is prone to hazards from impact. Thermal analysis indicates a high temperature for self propagating decomposition making the mixture thermally stable at room temperature.
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