RDX/硬脂酸铅复合粒子的制备及其性能表征  

Preparation and characterization of RDX/lead stearate composite particles

作　　者：安崇伟[1] 郭效德[1] 宋小兰[1] 王毅[1] 阎斌 李凤生[1] 

机构地区：[1]南京理工大学国家特种超细粉体工程技术研究中心,南京210094 [2]山西北方兴安化学工业有限公司,太原030008

出　　处：《固体火箭技术》2008年第5期504-507,共4页Journal of Solid Rocket Technology

基　　金：总装“十一五”预研项目(62301070203);国家自然科学基金资助项目(5060202450306008)

摘　　要：为改善RDX-CMDB推进剂的燃烧性能和安全性能,以硬脂酸铅为包覆剂,采用化学沉淀法对RDX填料进行了表面包覆,制备了RDX/硬脂酸铅复合粒子。用SEM、XPS对包覆效果进行了表征;对包覆前后样品的机械感度进行了测试和对比;采用DSC对分别由包覆前后RDX制成的推进剂进行了热分解催化性能测试。结果表明,经过硬脂酸铅包覆,RDX的机械感度得到明显降低,撞击感度特性落高(H50)升高了17.6 cm,摩擦爆炸概率(P)降低了60%。与加有纯RDX的推进剂样品相比,添加RDX/硬脂酸铅复合粒子推进剂样品的硝化棉/硝化甘油放热峰峰温降低了约3.7℃,总放热量也得到了提高。In order to improve safety and combustion properties of RDX-CMDB propellant, lead stearate was used to coat RDX by means of chemical precipitation method, then the RDX/lead stearate composite particles were prepared. The samples were characterized by using SEM （scanning electron microscope） and XPS （X-ray photoelectron spectrometry）. The mechanical sensitivity of RDX samples before and after coating was measured and contrasted. Meanwhile, thermal decomposition catalytic properties of RDX-CMDB propellant before and after coating were investigated respectively by DSC. The results show that the mechanical sensitivity of RDX coated by lead stearate decreases significantly ; the impact sensitivity characteristic height （ H50 ） increases by 17.6 cm, and the friction explosion probability decreases by 60%. Compared with the propellant containing uncoated RDX, the exothermic peak temperature of NC/NG with RDX/lead stearate composite particles decreases by about 3.7℃, and the total exothermic quantity of the propellant increases.

关 键 词：RDX 硬脂酸铅 复合粒子 CMDB推进剂 机械感度 热分解 

分 类 号：V512[航空宇航科学与技术—航空宇航推进理论与工程]