Insight into the thermal decomposition properties of potassium perchlorate (KClO4)-based molecular perovskite

Abstract

Studying thermal decomposition properties of the perchlorate-based molecular perovskite energetic materials is essential to facilitate the potential applications. In this work, thermal decomposition properties of potassium perchlorate (KClO4)-based molecular perovskite were investigated. Potassium perchlorate -based molecular perovskite (H2dabco)[K(ClO4)3] were prepared by the one-pot reaction of KClO4, HClO4 and triethylenediamine (dabco). The samples were characterized. The results show that (H2dabco)[K(ClO4)3] has ternary organic-inorganic perovskite crystal structures. The thermal decomposition results demonstrated that molecular perovskite (H2dabco)[K(ClO4)3] has a lower decomposition temperature (383.6 °C) and a higher heat release (2815 J g−1) than 607.7 °C and 313 J g−1 of the monocomponent KClO4, respectively. The activation energy of thermal decomposition of (H2dabco)[K(ClO4)3] had been reduced appreciably from 191.2 kJ mol−1 to 177.7 kJ mol−1. A synergistic catalysis thermal decomposition mechanism based on unique molecular perovskite structure was proposed. This work offers a novel understanding for thermal decomposition of the molecular perovskite energetic materials.