Hollow flower-like nickel particles as the promoter of ammonium perchlorate-based solid propellant
Hollow flower-like nickel particles as the promoter of ammonium perchlorate-based solid propellant
复制标题
DOI：
10.1016/j.apsusc.2021.149506
复制
发表时间：
2021-06
影响因子：
6.7
通讯作者：
Teng Zhang;Hongbing Shi;Yabing Zhang;Qing Liu;W. Fei;Tao Wang
中科院分区：
文献类型：
--
作者：
Teng Zhang;Hongbing Shi;Yabing Zhang;Qing Liu;W. Fei;Tao Wang
采用多元醇法制备了空心花状镍粉，并将其应用于固体推进剂中作为助燃剂。采用Ni[C2 H4（NH 2）2]3（COOH）2配合物在乙二醇（EG）中制备空心花状中间体，然后将中间体煅烧并在氮气中自还原，得到空心花状镍颗粒。空心粒子的壳层厚度约为120 nm，花状结构的花瓣厚度约为10 nm。通过调节配合物Ni[C2 H4（NH 2）2]3（COOH）2在反应液中的浓度，可以在200 nm ~ 2 μm范围内精确控制空心球的直径。通过对反应过程中中间产物形貌的分析，表明空心花状颗粒的生长是一个特殊的生长-收缩-塌陷过程，一定量（通常为5wt%）的镍粉对固体推进剂主要组分高氯酸铵的放热分解有很好的促进作用。AP的分解温度降低了约140 °C，高温放热峰向低温区移动，分解放热增加了约150%。
Hollow flower-like nickel particles were prepared by a facile polyol method, and applied to solid propellant as combustion promoter. Ni[C2H4(NH2)2]3(COOH)2complex was used to fabricate hollow flower-like intermediate in ethylene glycol (EG), and then the intermediate was calcined and auto-reduced in nitrogen to obtain the hollow flower-like nickel particles. The hollow particles' shell thickness is about 120 nm, and the petals' thickness of the flower structure is about 10 nm. Importantly, the hollow spheres' diameter can be accurately controlled from 200 nm to 2 μm by adjusting the concentration of complex Ni[C2H4(NH2)2]3(COOH)2in the reaction solution. The growth of the hollow flower-like particles was illustrated as an extraordinary growth-shrink-collapse process by analyzing the intermediate's morphologies as reaction going on. By adding a certain amount (typically 5 wt%) of the prepared nickel powders, the exothermic decomposition of ammonium perchlorate, which is the main component of solid propellant, was well promoted. The decomposition temperature was decreased by about 140 °C, and the exothermic peak at higher temperature shifted to the lower temperature range, heat released of AP's decomposition also increased by about 150%.