含能材料2016，Vol.24Issue(12)：1136-1144,9.DOI:10.11943/j.issn.1006-9941.2016.12.001
静电喷射纳米铝热剂的微推进性能
Micropropulsion Characteristics of Nanothermites Prepared by Electrospray
汝承博 1王飞 1许建兵 1代骥 1沈云 1叶迎华 1朱朋 1沈瑞琪1
作者信息
- 1. 南京理工大学化工学院, 江苏 南京 210094
- 折叠
摘要
Abstract
Nanothermites can be used as the propellant of MEMS-based microthrusters.Addition of energetic binder can enhance the propulsion performance of nanothermite.In this work, nitrocellulose(NC) and polyvinylidene fluoride(PVDF) were chosen as the binder, and the mixtures were prepared by electrospray mixing process.Based on both Chemical Equilibrium and Application(CEA) software calculation and experiments, the influences of fuel/oxide equilibrium ratio (Φ) and the content of binding agents on propulsion performance were systematically studied, while the results were compared with propulsion performance of the mechanically mixed nanothermites.Results show that nanoparticles were more uniformly dispersed in the electrospray mixed nanothermite than the mechanically mixing case.The calculated optimum Φ of Al/CuO was 0.9, while the optimal tested Φ was 1.8.Specific impulse of the mixture reaches 250.2 m·s-1, by increase of 8.0% for 2.5% NC in comparison with the binder-free Al/CuO.The addition of PVDF reduces the tested specific impulse.The decomposition products of binder separate nanoparticles and increase the characteristic m·ss transport length of the condensed phase reaction, leading to a distinctly increase in combustion duration, from 2.9 ms to 87.8 ms.关键词
纳米铝热剂/固体化学微推进器/比冲/静电喷射/含能粘结剂Key words
nanothermites/solid propellant microthrusters/specific impulse/electrospray/energetic binder分类
军事科技引用本文复制引用
汝承博,王飞,许建兵,代骥,沈云,叶迎华,朱朋,沈瑞琪..静电喷射纳米铝热剂的微推进性能[J].含能材料,2016,24(12):1136-1144,9.
