Song Jiaxing, Guo Tao, Yao Miao, Ding Wen, Zhang Xiaonan, Bei Fengli, Tang Jian, Huang Junyi, Yu Zhongshen
College of Field Engineering, Army Engineering University of PLA Nanjing 210007 China
School of Chemical, Nanjing University of Science and Technology Nanjing 210094 China.
RSC Adv. 2019 Dec 13;9(70):41319-41325. doi: 10.1039/c9ra08663c. eCollection 2019 Dec 9.
To explore the effect of potassium perchlorate (KClO) on Al nanoparticles/MnO-nanorods nanothermite systems, in this paper, Al/MnO nanothermites with different mass fraction of KClO were prepared by electrospray. The samples were characterized by XRD, SEM, TG-DSC analysis. According to the results of TG-DSC, the addition of KClO seemed to cause no direct improvement on their exothermic reactions. But the results of activation energy calculations showed that KClO could remarkably reduce the activation energy of nanothermite systems by up to 48.8%. The XRD results indicated that residues consisted mainly of MnO. The reasons why KClO has little effect on thermal properties but makes a great difference on kinetics were analyzed and discussed. Finally, onset combustion tests were carried out. The results and findings provide a useful approach to decrease the activation energy and combustion rate of nanothermites, which may facilitate practical and combustible applications.
为探究高氯酸钾（KClO）对铝纳米颗粒/二氧化锰纳米棒纳米铝热剂体系的影响，本文采用电喷雾法制备了具有不同KClO质量分数的Al/MnO纳米铝热剂。通过X射线衍射（XRD）、扫描电子显微镜（SEM）、热重-差示扫描量热法（TG-DSC）分析对样品进行了表征。根据TG-DSC结果，添加KClO似乎并未直接改善其放热反应。但活化能计算结果表明，KClO可使纳米铝热剂体系的活化能显著降低，降幅高达48.8%。XRD结果表明，残余物主要由MnO组成。分析并讨论了KClO对热性能影响较小但对动力学有显著影响的原因。最后进行了燃烧起始测试。研究结果为降低纳米铝热剂的活化能和燃烧速率提供了一种有效方法，这可能有助于实际的可燃应用。
