球形ε型CL-20的制备与性能研究  

Preparation and Characterization of Spherical ε CL-20

作　　者：荆肖凡[1] 徐文峥[1] 王晶禹[1] 安崇伟[1] 

机构地区：[1]中北大学化工与环境学院,太原山西030051

出　　处：《中北大学学报（自然科学版）》2014年第2期173-176,181,共5页Journal of North University of China(Natural Science Edition)

摘　　要：以乙酸乙酯为溶剂,正庚烷为非溶剂,采用自制的喷雾辅助结晶装置制备了球形CL-20,用扫描电镜和X射线衍射仪对制备样品的形貌和晶型进行了表征,并通过差示扫描量热法和撞击感度分析仪测试了样品的热稳定性能和撞击感度.结果表明:制备的样品呈球形,颗粒分布均匀,中值粒径为1.49μm,且CL-20晶型为ε型.和原料CL-20相比,结晶后CL-20的撞击感度明显降低,特性落高(H50)由21.98 cm升高到46.67 cm,摩擦爆炸概率由100%降至72%.经过该结晶工艺,CL-20的活化能和热爆炸临界温度略有降低.Recrystallization of spherical CL-20 was performed using anti- solvent technique aided by spray with the ethyl acetate as solvent while the heptane as anti-solvent. SEM （scanning electron microscopy） and XRD （X-ray diffraction） were employed to characterize the morphology and polymorph of the samples. The thermostability was analyzed by differential scanning calorimetry（DSC） and the impact sensitivity was measured by impact sensitivity analyzer. The results show that, compared to raw CL-20, recrystallized CL-20 samples are uniform in spherical shapes and have better dispersion, The mean particle size of CL-20 is 1.49μm and the type of spherical CL-20 is ε phase. Impact sensitivi- ty tests indicate that spherical CL-20 is less sensitive than raw CL-20. The drop height （H50） of CL-20 is increased from 21.98 cm of raw CL-20 to 46.67 cm of spherical CL-20. The probability of friction explosion is decreased from 100 % of raw CL-20 to 72 % of spherical CL-20. Through the recrystallization process, the activation energy and the critical temperature of thermal explosion of CL-20 are slightly reduced.

关 键 词：材料科学 球形化CL-20 撞击感度 热安定性 

分 类 号：TQ564[化学工程—炸药化工]