细粒度ε-CL-20的制备及钝化

Preparation and Passivation of Fine ε-CL-20

采用溶剂-非溶剂重结晶法制备了细粒度ε-CL-20,分析了加料方式、晶体生长控制剂种类等因素在结晶细化过程中对CL-20微晶形貌和粒度的影响。结果表明,上述几种因素对细粒度CL-20的形貌、粒径及聚集状态均有较大影响。采用超声波辅助技术可明显改善CL-20的晶体形貌和防止晶体团聚,显著降低产品的机械感度,所制备的ε-CL-20平均粒径为(16±1)μm、摩擦感度和撞击感度分别为84%和55.1J,明显优于原料。

The fine ε-CL-20 was prepared by recrystalization with solvent nonsolvent method. The feeding styles and categories of additives for controlling crystal growth on the crystal morphology and particle size were analyzed. The results show that they have great effect on the morphology, particle size and agglomeration in the crystallization process. Sonication process offers uniform crystalline morphology without any agglomeration and can decrease its mechanical properties. The particle size of fine CL 20 sample is around（16 ± 1）μm,and its friction and impact sensitivity were 84 % and 55.1J, respectively,which were much more insensitive than the original products.