【作者】 徐金江； 程克梅； 刘渝； 郝晓飞； 王慧；

【Author】 XU Jin-jiang;CHENG Ke-mei;LIU Yu;HAO Xiao-fei;WANG Hui;Institute of Chemical Materials,CAEP;

【机构】 中国工程物理研究院化工材料研究所；

【摘要】 金属离子作为炸药结晶过程中常见的杂质,对炸药晶体品质及性能有重要影响。研究获得了Fe3+、Zn2+、Ca2+和Na+离子对HMX结晶特性及热性能的影响,分析了金属离子掺杂后炸药晶体的缺陷分布及形成过程;利用ICP、XPS及刻蚀方法表征了获得了残留金属离子在炸药晶体中的含量及分布,基于DSC-TG及原位XRD技术表征获得了金属离子对HMX热分解和热晶变规律的影响,并初步探索了金属离子对HMX结晶的作用机制,结果表明,金属离子会改变HMX的成核生长方式使其呈现分散结晶HMX;残余的金属离子主要吸附在晶体表面及包藏在晶体内部;掺杂的HMX为层状堆积生长机理,并且金属离子通过阻碍炸药晶体的生长台阶来改变晶体的结晶品质,而晶体品质与热性能密切相关,进而影响炸药的安全性。更多还原

【Abstract】 Metal ions as the common impurity in the crystallization of energetic materials, which can impact its crystal quality and properties. The crystallization characteristics and thermal properties of doped-HMX effected by the four metal ions of Fe3+、Zn2+、Ca2+ and Na+ were studied. The morphology change of doped-HMX were investigated under the effect of different species and concentration of metal ions. The defect distribution and forming of ion doped-HMX were analyzed. And also the residual content of metal ions were measured by ICP and XPS. With the DSC-TG and in situ-XRD methods the influence of metal ion on thermal properties and heat-induced phase transition were obtained. Moreover, the mechanism of metal ion effected on the crystal growth and thermal properties were investigated. Results show that the nuclear way of HMX was changed and appeared disperse crystallization. The residual ions mainly deposit on the surface and interior of HMX crystals. The doped-HMX growth on the basis of layer-by-layer mechanism, and the crystal quality of HMX was altered through the hindered of crystal growth step by metal ions. Due to the intimate connection of crystal quality and thermal properties, the safety of HMX would be altered.更多还原