Thermal behavior and combustion of Al nanoparticles/ MnO2-nanorods nanothermites with addition of potassium perchlorate

Jiaxing Song; Tao Guo; Miao Yao; Wen Ding; Xiaonan Zhang; Fengli Bei; Jian Tang; Junyi Huang; Zhongshen Yu

doi:10.1039/c9ra08663c

Thermal behavior and combustion of Al nanoparticles/ MnO₂-nanorods nanothermites with addition of potassium perchlorate

RSC Adv. 2019 Dec 13;9(70):41319-41325. doi: 10.1039/c9ra08663c. eCollection 2019 Dec 9.

Authors

Jiaxing Song^{1

2}, Tao Guo¹, Miao Yao¹, Wen Ding¹, Xiaonan Zhang¹, Fengli Bei², Jian Tang³, Junyi Huang¹, Zhongshen Yu¹

Affiliations

¹ College of Field Engineering, Army Engineering University of PLA Nanjing 210007 China guotao3579@126.com.
² School of Chemical, Nanjing University of Science and Technology Nanjing 210094 China.
³ School of Materials Science and Engineering, Northwestern Polytechnical University Xi'an 710072 China.

Abstract

To explore the effect of potassium perchlorate (KClO₄) on Al nanoparticles/MnO₂-nanorods nanothermite systems, in this paper, Al/MnO₂ nanothermites with different mass fraction of KClO₄ were prepared by electrospray. The samples were characterized by XRD, SEM, TG-DSC analysis. According to the results of TG-DSC, the addition of KClO₄ seemed to cause no direct improvement on their exothermic reactions. But the results of activation energy calculations showed that KClO₄ could remarkably reduce the activation energy of nanothermite systems by up to 48.8%. The XRD results indicated that residues consisted mainly of Mn₃O₄. The reasons why KClO₄ 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.