Green Fabrication of Nanoscale Energetic Molecular Perovskite (H<sub>2</sub>dabco)[Na(ClO<sub>4</sub>)<sub>3</sub>] with Reduced Mechanical Sensitivity

High-energy-density molecular perovskite energetic materials with high detonation performance have attracted much attention, but poor safety performance has limited their potential applications.In this paper, nano sodium perchlorate-based molecular perovskite (H2dabco)[Na(ClO4)3] (nano DAP-1) was fabricated by green ball-milling technology.The structure and morphology of the samples were characterized and the results showed that nano DAP-1 with nearly spherical morphology has a narrow particle size distribution, < 1 μm.The thermal decomposition properties were investigated by differential scanning calorimetry (DSC).The exothermic peak of nano DAP-1 thermal decomposition was 330.0 °C, a decrease of 51.7 °C compared with that of raw DAP (381.7 °C).The apparent activation energy (Ea) of nano DAP-1 was calculated to be 160.9kJ•mol -1 , which is lower than that of raw DAP-1 (168.6 kJ•mol -1 ).Mechanical sensitivity studies showed that nano DAP-1 (H50: 64 cm) exhibited a lower impact sensitivity than that of the raw DAP-1 (H50: 51 cm).This work provides a simple and effective way for improving the thermal decomposition properties and safety performance of molecular perovskite energetic materials.