Abstract
Carbonates have been used as only pyrotechnic colorants with other oxidisers. But it was considered that the using carbonates which did not contained chloride, nitrogen oxides, and sulfur as oxidiser in pyrotechnics composition is one of the solution methods for reducing of toxic and harmful ingredients and smoke. Calcium carbonate (CaCO3), which produces an orange flame in fireworks and not typically used as the main component in pyrotechnic compositions, was tested to be used as oxidiser in combination with Ti in this study for developments of carbonates-based pyrotechnics composition. And the substitution of commercial CaCO3 powder with eggshell, with calcium carbonate as their major component, was tested for making effective use of a food waste product. The mixture between CaCO3 and Ti was ignited under argon atmosphere as traditional pyrotechnics composition. The reaction products of the mixture which were TiC and CaTiO3 were determined, and the equation of combustion reaction was summarised. The mixture exhibited continuous combustion and low sensitivity, demonstrating the potential to be used in pyrotechnics. The spark generation was found to be enhanced on substituting CaCO3 with eggshell powder.
