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RDX/Al/SiO2纳米复合含能材料的制备及性能
Preparation and Properties of RDX/Al/SiO2 Nano-composite Energetic Materials
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中文摘要:
      为了在降低黑索今(RDX)机械感度的同时提高其热分解性能,以四甲氧基硅烷为前驱物,氟硼酸为催化剂,用溶胶-凝胶法制备了RDX-Al质量分数分别为30%、50%、70%(RDX与Al质量比均为6∶1)的三种RDX/Al/SiO2纳米复合含能材料。用扫描电子显微镜(SEM)、能谱分析(EDS)及X-射线衍射(XRD)对其形貌及结构进行了表征; 用热重分析(TG)、差示扫描量热(DSC)研究了样品的热性能; 按GJB772A-1997的方法测试了样品的机械感度。结果表明: RDX/Al/SiO2是以SiO2为凝胶骨架,Al与RDX进入到凝胶骨架中形成的纳米复合含能材料; 该复合材料中RDX的最小平均粒径为65.09 nm,且其粒径随RDX-Al含量的增加而增大; 当RDX-Al的质量分数为30%时,与纯RDX相比,该复合材料中RDX的分解温度较纯RDX提前22.4 ℃,与原料RDX相比,样品的特性落高提高108.6 cm,爆炸百分数降低60%。
中文关键词: 溶胶-凝胶法  黑索今(RDX)  纳米复合含能材料  热分解  机械感度
英文摘要:
      To reduce the mechanical sensitivity of RDX and improve its thermal decomposition performance, three kinds of RDX/Al/SiO2 nano-composite energetic materials of RDX/Al mass fraction as 30%, 50% and 70% respectively (the mass ratio of RDX to Al is 6∶1) were prepared by sol-gel method using tetramethoxysilane as precursor and fluorine boric acid as catalyst. Their morphology and structurre were characterized by scanning electron microscopy(SEM), energy dispersive spectrometer(EDS) and X-ray diffraction(XRD). Thermal performances of the samples were investigated by thermogravimetric analysis(TG) and differential scanning calorimetry(DSC). The mechanical sensitivity of the samples was measured according to GJB772A-1997 method. The results show that the RDX/Al/SiO2 is the nano-composite energetic material formed by the Al and RDX into the skeletonn of gel as SiO2. The minimum particle size of RDX in composite material is 65.09 nm, with increasing the RDX-Al content, its average particle size increases.When the mass fraction of RDX-Al is 30%, compared with the pure RDX, the decomposition temperature of RDX in the composite material decreases by 22.4 ℃, compared with the raw material RDX, the characteristic drop height (H50) of the sample increases by 108.6 cm and the percentage of explosion decreases by 60%.
英文关键词: sol-gel method  RDX  nano-composite energetic material  thermal decomposition  mechanical sensitivity
DOI:10.11943/j.issn.1006-9941.2017.08.007
基金项目:
引用文献:张冬冬,黄寅生,李瑞,李猛,王俊杰,葛梦珠,张辉建,何亚丽.RDX/Al/SiO2纳米复合含能材料的制备及性能[J].含能材料,2017,25(8):656~660
作者单位E-mail
张冬冬 南京理工大学化工学院, 江苏 南京 210094 zhangdong_dong01@163.com,huangyinsheng@sina.com 
黄寅生 南京理工大学化工学院, 江苏 南京 210094 huangyinsheng@sina.com 
李瑞 南京理工大学智能弹药技术国防重点实验室, 江苏 南京 210094  
李猛 南京理工大学化工学院, 江苏 南京 210094  
王俊杰 南京理工大学化工学院, 江苏 南京 210094  
葛梦珠 南京理工大学化工学院, 江苏 南京 210094  
张辉建 南京理工大学化工学院, 江苏 南京 210094  
何亚丽 南京理工大学化工学院, 江苏 南京 210094  
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