The Preparation and Properties of AP-Based Nano-Limit Growth Energetic Materials

AP-based nanolimit growth energetic materials (NLGEM) were prepared by using SiO2 gel as nanolimit growth skeleton materials and using sol-gel method combining solution crystallization to make AP recrystallized in the nanopores of SiO2 gel skeleton to form AP/SiO2 NLGEM. The chemical and physical structure and properties of AP/SiO2 NLGEM were studied in detail. AP with nanoscale particles size range from 69nm to108nm was recrystallized in the pore of SiO2 gel skeleton and the particle size of AP increased with the amount of AP in NLGEM increasing. Moreover, the preparation method didnt change the crystal form of AP and bring impurities to NLGEM. The decomposition of AP/SiO2 NLGEM was a one-step process, which was indicated its decomposition was more concentrate than pure AP and AP/SiO2 simple physical mixture (AP/SiO2 SPM), whose decomposition was a two-step process. At the time, the decomposition heat of AP/SiO2 NLGEM was higher than that of pure AP and AP/SiO2 SPM. The sensitivity of AP/SiO2 NLGEM was lower than those of the pure energetic components and physical mixtures according to the impact sensitivity test.