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以山梨糖醇酐三油酸酯(Span-85)作为过程控制剂,通过氢化铝锂还原无水氯化铝,采用高能机械球磨法制备了纳米铝粉(n-Al)。利用扫描电镜(SEM)、高分辨率透射电镜(TEM)、X射线衍射(XRD)仪、傅里叶变换红外光谱(FTIR)仪及X射线光电子能谱(XPS)仪对其形貌和结构进行了表征。用差示扫描量热仪(DSC)对ADN(二硝酰胺铵)、n-Al/ADN的热分解反应特性进行了研究。结果表明:纳米铝粉属立方晶系,表面包覆有无定型Al2O3氧化物及部分表面活性剂Span-85,同时制备的纳米铝粉试样中含少量Al Cl3·6H2O杂质;此方法制备的n-Al粒子对ADN液化温度几乎没有影响,但放热分解温度明显增大,且ADN分解由多重峰变为单一的尖峰。
Nano aluminum powder (n-Al) was prepared by high-energy mechanical ball milling using sorbitan trioleate (Span-85) as the process control agent and lithium aluminum hydride reduction of anhydrous aluminum chloride. The morphology and structure of the samples were characterized by scanning electron microscopy (SEM), high resolution transmission electron microscopy (TEM), X-ray diffraction (XRD), Fourier transform infrared spectroscopy (FTIR) and X-ray photoelectron spectroscopy Characterized. The thermal decomposition reaction of ADN (ammonium dinitramide) and n-Al / ADN was investigated by differential scanning calorimetry (DSC). The results show that: nano-aluminum powder is a cubic system, the surface is coated with amorphous Al2O3 oxide and some surfactant Span-85, while the preparation of nano-aluminum powder sample containing a small amount of Al Cl3 · 6H2O impurities prepared by this method The n-Al particles had little effect on the ADN liquefaction temperature, but the exothermic decomposition temperature increased significantly, and the ADN decomposition changed from multiple peak to single peak.