纳米RDX的热性能及感度研究磁

采用激光粒度仪跟踪粒度分布，用扫描电子显微镜（SEM）和透射电子显微镜（TEM）观察颗粒大小和形貌；通过热重（TG）和差示扫描量热法（DSC）分析了使用HLGB-10型粉碎机批量制备纳米黑索今（RDX）的热分解特性，并测定了5s爆发点和感度。研究结果表明，制备的纳米RDX粒度分布窄；与原料RDX相比，活化能和5S爆发点稍有降低，热安定性基本不变，静电感度与火焰感度与原料RDX相当；摩擦、撞击和冲击波感度分别比原料RDX降低了37．5％、92．8％和51．0％。

Study on Thermal Properties and Sensitivities of Nano-RDX

The particle size distribution of nano-RDX was traced by the laser particle size analyzer. At the same time, the particle size and the morphology of nano-RDX were characterized through the SEM and the TEM. The thermal decomposition of nano-RDX which was prepared in batches by the pulverized machine HLGB-10 was examined by the TG/DSC simultaneous thermal analyzer. Furthermore, the explosion temperature in five seconds and the sensitivities were meas- ured. Results show that the nano-RDX gets a narrow particle size distribution. Compared with the coarse counterpart, the activation energy and the explosion temperature in five seconds decrease slightly, and the thermal stability remains unchanged. The electrostatic sensitivity and the flame sensitivity of nano-RDX are the same as that of the coarse counterpart, while friction, impact and shock wave sensitivity of nano-RDX respectively decrease by 37.5%, 92.8% and 51.0%.