粒度和形貌及粒度分布对RDX安全和热分解性能的影响  

Influence of particle size,morphology and size distribution on the safety and thermal decomposition properties of RDX

作　　者：宋小兰[1] 李凤生[1] 张景林[2] 郭效德[1] 安崇伟[1] 王毅[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]中北大学化工与环境学院,太原030051

出　　处：《固体火箭技术》2008年第2期168-172,共5页Journal of Solid Rocket Technology

基　　金：国家自然科学基金项目(50602024);总装备部预研项目(62301070203)

摘　　要：采用溶剂/非溶剂法和筛分法,通过控制搅拌速度及溶剂与非溶剂温度差,制备了不同粒度、形貌和粒度分布的RDX粉末。利用激光粒度仪、扫描电子显微镜(SEM)和X射线衍射(XRD)对其进行了相应表征;利用撞击和摩擦感度试验、慢烤试验及DSC测试分别研究了不同粒度、形貌及粒度分布的RDX样品的安全性能和热分解特性。研究结果表明,粒度、形貌及粒度分布是影响RDX安全和热分解性能的重要因素。随着粒度的减小,RDX的机械和热感度显著降低。另外,窄粒度分布的RDX样品普遍具有更低的机械感度,而宽粒度分布的RDX样品通常具有更好的热稳定性。Through controlling the mixing speed and the temperature difference between solvent and non-solvent, the RDX sampies with different particle size, morphology and size distribution were prepared by means of solvent/non-solvent and sieving methods, The RDX samples were characterized by laser granularity measurement device, scanning electron microscope （SEM） and Xray diffraction （XRD）. The safety and thermal decomposition properties of RDX samples with different particle size, morphology and size distribution were investigated by means of impact and friction sensitivity test, slow cook-off test and DSC methods. The resuits show that particle size, morphology and size distribution are the important factors affecting the safety and thermal decomposi- tion properties of RDX samples. With the decrease of particle size, the mechanical property and thermal sensitivities of RDX reduce remarkably, In addition, the RDX samples with narrow size distribution possess lower mechanical sensitivity, whereas the RDX samples with broad size distribution have better thermal stability.

关 键 词：RDX 推进剂 粒度及粒度分布 形貌 安全性能 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]