超临界流体增强溶液扩散法制备RDX/SiO_2复合粒子

Preparation of RDX/SiO_2 Composite Particles by Using Supercritical Fluids Enhanced Solution Dispersion

利用溶胶一凝胶法及超临界流体增强溶液扩散法（SEDS），制备了RDX／SiO2复合粒子（RDX占90％），获得了最佳工艺条件。利用电子显微镜和场扫描电镜（SEM）对RDX／SiO2微粒进行了表征，并根据GJB772A-1997测试了其撞击感度。结果表明：得到的RDX／SiO2为形貌和粒径均匀的气凝胶球，气凝胶球由粒径约为50-100nm的微粒堆积而成；RDX／Si02微粒的特性落高（H50）为86．7cm，与原料RDX相比，特『生落高远远提高。

Using sol-gel and SEDS method, RDX/SiO2 composite particles were prepared, in which RDX accounted for 90%.It was characterized by electron microscope and SEM. The impact sensitivity was tested according to GJB 772A-1997. The results show that the aerogel balls with tmiform morphology and particle size has been gotten. The aerogel balls are piled up with micro particles, which diameters are about 50-100nm. The characteristic drop height （H50） of RDX/SiO2 particles is 86.7cm. Compared with the raw material RDX, the characteristic drop height has been improved mostly.