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In this paper, we investigated the potential use of a new organic-inorganic hybrid crystal structure based on KNO3 in ignition compositions. H2dabco[K(NO3)3] (DAN-2) with organic-inorganic hybrid crystal structure is synthesized through intermolecular assembly technology. Scanning electron microscopy (SEM), X-ray diffraction (XRD) and Fourier transform infrared spectroscopy (FT-IR) were used to detect the crystal morphology, structure and molecular structure of DAN-2, which has a regular cubic structure. Experimental data were obtained using thermogravimetric/differential scanning calorimetry (TG-DSC), closed bomb test and high-speed photography, which were then used to study and analyze the thermal decomposition properties and combustion properties of DAN-2. The initial thermal decomposition temperature of DAN-2 was low (194 °C) and the activation energy of the thermal decomposition was 154 kJ/mol. Possible thermal decomposition mechanisms are further discussed and proposed. This research pushed forward the application of organic-inorganic hybrid crystal structure oxidant DAN-2 in ignition system.

Fe/N-based biomass porous carbon composite (Fe/N-pCarbon) was prepared by a facile high-temperature carbonization method from biomass, and the effect of Fe/N-pCarbon on the thermal decomposition of energetic molecular perovskite-based material DAP-4 was studied. Biomass porous carbonaceous materials was considered as the micro/nano support layers for in situ deposition of Fe/N precursors. Fe/N-pCarbon was prepared simply by the high-temperature carbonization method. It was found that it showed the inherent catalysis properties for thermal decomposition of DAP-4. The heat release of DAP-4/Fe/N-pCarbon by DSC curves tested had increased slightly, compared from DAP-4/Fe/N-pCarbon-0. The decomposition temperature peak of DAP-4 at the presence of Fe/N-pCarbon had reduced by 79°C from 384.4°C (pure DAP-4) to 305.4°C (DAP-4/Fe/N-pCarbon-3). The apparent activation energy of DAP-4 thermal decomposition also had decreased by 29.1 J/mol. The possible catalytic decomposition mechanism of DAP-4 with Fe/N-pCarbon was proposed.

Energetic molecular perovskites have attracted widespread attention in the fields of energy materials due to their high detonation performance. In this work, we reported the effect of MgCo2O4 nanosheets on the thermal decomposition of ammonium perchlorate (NH4ClO4, AP)-based energetic molecular perovskites (AP-based energetic molecular perovskites). The morphology and structure of the MgCo2O4 nanosheets were characterized. And their catalytic effect on the thermal decomposition of AP-based energetic molecular perovskites (H2pz)[NH4(ClO4)3] (PAP-4), (H2dabco)[NH4(ClO4)3] (DAP-4), (H2mpz)[NH4(ClO4)3] (PAP-M4), and (H2hpz)[NH4(ClO4)3] (PAP-H4) was analyzed. The results showed that MgCo2O4 nanosheets had excellent intrinsically catalytic performance towards enhancing the thermal decomposition of AP-based energetic molecular perovskites. After adding MgCo2O4 nanosheets, the thermal decomposition peak temperatures of PAP-4, DAP-4, PAP-M4, and PAP-H4 had been reduced by 35.7 °C, 48.4 °C, 37.9 °C, and 43.6 °C, respectively. And the activation energy (Ea) of the thermal decomposition of AP-based energetic molecular perovskites had been reduced, the Ea of PAP-H4 decreased by 46.4 kJ/mol at most among them. The catalytic mechanism of MgCo2O4 nanosheets for AP-based energetic molecular perovskites is analyzed. This work provides a reference for the future application of AP-based energetic molecular perovskites.

Energetic molecular perovskites have attracted widespread attention in the fields of energy materials due to their high detonation performance. In this work, we reported the effect of MgCo2O4 nanosheets on the thermal decomposition of ammonium perchlorate (NH4ClO4, AP)-based energetic molecular perovskites (AP-based energetic molecular perovskites). The morphology and structure of the MgCo2O4 nanosheets were characterized. And their catalytic effect on the thermal decomposition of AP-based energetic molecular perovskites (H2pz)[NH4(ClO4)3] (PAP-4), (H2dabco)[NH4(ClO4)3] (DAP-4), (H2mpz) [NH4(ClO4)3] (PAP-M4), and (H2hpz)[NH4(ClO4)3] (PAP-H4) was analyzed. The results showed that MgCo2O4 nanosheets had excellent intrinsically catalytic performance towards enhancing the thermal decomposition of AP-based energetic molecular perovskites. After adding MgCo2O4 nanosheets, the thermal decomposition peak temperatures of PAP-4, DAP-4, PAP-M4, and PAP-H4 had been reduced by 35.7 °C, 48.4 °C, 37.9 °C, and 43.6 °C, respectively. And the activation energy (Ea) of the thermal decomposition of AP-based energetic molecular perovskites had been reduced, the Ea of PAP-H4 decreased by 46.4 kJ/mol at most among them. The catalytic mechanism of MgCo2O4 nanosheets for AP-based energetic molecular perovskites is analyzed. This work provides a reference for the future application of AP-based energetic molecular perovskites. [ABSTRACT FROM AUTHOR]