Combustion performance of nano Si powder with molecular perovskite energetic materials DAP-4 as oxidant

Nano Silicon (Si) powder has become a new type of solid fuel in recent years because of its high energy density , large gas production, and low agglomeration behavior. Optimizing and improving its energy release performance is an important challenge. In this paper, DAP-4, an energetic molecular perovskite material with high energy and strong oxidation , was introduced as the oxidant to prepare DAP-4/Si composites, and its combustion properties were studied. The thermal decomposition , combustion performance, as well as their combustion product properties, were studied. The results showed the thermal decomposition properties of DAP-4/Si composites still keep stable (>370 °C), and the combustion properties of DAP-4/Si composites first increase with Si content and then reduced. It was confirmed that DAP-4/Si with the ratio of 6.5:3.5–6:4 had a better burning intensity than the other ratios. The combustion mechanism of DAP-4/Si composites was proposed based on the ignition and combustion characteristics of DAP-4/Si composites. This work may provide a further reference for the application of DAP-4 into solid propellant formulation.