Oxidation of tantalum metal by lead chromate

Differential thermal analysis and gravimetry techniques have been used in the investigation of the tantalum/lead chromate pyrotechnic composition for a range of fuel/oxidant mixtures. Studies include investigation of tantalum and lead chromate individually as well as co-precipitated mixtures, when heated up to approximately 900°C in air and in nitrogen. The kinetics of oxidation of metallic fuels by metal oxides is one of the most important parameters in determining the utility of any metal oxide system in pyrotechnic applications. Infrared spectroscopy has been utilised in an attempt to characterise the reaction products in air and in nitrogen atmosphere.