球形化HMX制备及性能研究

对溶剂侵蚀法进行了改进,获得了一种能够制备表面光滑球形HMX晶体颗粒的方法。用光学显微镜、扫描电镜和激光粒度仪表征了球形HMX的粒度和形貌,采用差示扫描量热法(DSC)比较了球形化前后HMX的热性能,用标准容器法和压缩刚度法分别测试了球形化前后HMX晶体的堆积密度和力学性能。研究结果表明,球形化后HMX呈球形度高,表面光滑,该方法不改变原有HMX的颗粒粒径分布,对热性能和机械感度未产生影响,但可将松装堆积密度提高13%以上,力学性能也得到了明显改善。

Preparation and Properties of Rounded HMX

HMX with round and smooth crystal particles was prepared by improving solvent etching,and was compared with raw HMX. Their particle sizes and morphologies were characterized with optical microscopy (OMS),scan electron microscope (SEM) and laser particle size analyzer,and packing densities were tested by standard vessel method,and thermal and mechanical properties were tested by differential scanning calorimeter (DSC) and the compressive stiffness test (CST). Results show that rounded HMX is round and smooth,the characteristics such as the powder size distributions,thermal properties and mechanical sensitivity do not change,while packing density is increased by 13% and mechanical properties are obviously improved.