摘要
在乙二醇体系中,采用PVP(聚乙烯吡咯烷酮,K-30)分散沉淀法,制备了亚微米级的六硝基合钴酸钾K3Co(NO2)6,使用扫描电子显微镜(SEM)、X射线衍射分析仪(XRD)和差示扫描量热仪(DSC),对产物的粒径、形貌、组成及对AP热分解的影响等特性进行了表征和研究,并对K3Co(NO2)6机械感度进行了研究。结果表明,在一定范围内,随温度升高,产物粒径增大,粒子表面变得粗糙;随PVP含量增加,粒径也在变大,团聚现象严重;与水和丙三醇相比,用乙二醇作溶剂时得到的产物粒径小,分散性好;K3Co(NO2)6感度测试结果为撞击感度H50>60 cm,摩擦感度是0%;3%750 nm的K3Co(NO2)6使AP的高温分解温度降低124.4℃,DSC表观分解热由574.7 J/g提高到1 332.5 J/g。
The K3Co（ NO2）6submicron particles were prepared by co-precipitation method which is dispered by PVP in the ethylene glycol. The diameter,morphology,components and its influence on the thermal decomposition of AP were researched by Scanning Electronic Microscopy,X-ray Diffractometry and Differential Scanning Calorimeter. The mechanical sensitivity of K3Co（ NO2）6was studied also. The results show that the product particle size increases and its surface becomes rough as temperature rises. The particle dimension increases and the agglomeration of the particles become serious as PVP increases. Compared with glycerol and water,smaller size and good dispersity product can be obtained using ethylene glycol as solvent. The impact sensitivity of K3Co（ NO2）6is H5060 cm,and the friction sensitivity is 0%; 3% 750 nm K3Co（ NO2）6can decrease high-temperature thermal-decomposition peak temperatures of AP by 124. 4 ℃ respectively,and increase the DSC heat release of AP from 574. 7 J / g to 1 332 J / g.
出处
《固体火箭技术》
EI
CAS
CSCD
北大核心
2015年第4期537-540,共4页
Journal of Solid Rocket Technology
