火炸药学报2016，Vol.39Issue(5)：84-92,9.DOI:10.14077/j.issn.1007-7812.2016.05.014
超级铝热剂Al/Fe2O3对硝化棉热分解特性的影响
Effects of Superthermite Al/Fe2O3 on the Thermal Decomposition Characteristics of Nitrocellulose
摘要
Abstract
The nano-Fe2O3 was prepared by hydrothermal method, and then combined with Al nanoparticles using ultrasonic dispersion method to prepare superthermite Al/Fe2O3. The physical phase, composition, morphology and structure of the composite were characterized by X-ray powder diffraction (XRD), transmission electron microscopy (TEM) and scanning electron microscope-energy dispersive spectrometer (SEM-EDS). The differential scanning calorimetry (DSC) and the thermogravimetry with Fourier transform infrared analysis (TG-FTIR) were employed to investigate the effects of the superthermite Al/Fe2O3 on the thermal decomposition process of nitrocellulose (NC). The results show that the thermal decomposition reactions of Al/Fe2O3-NC composite and NC follow the same thermal decomposition mechanism with the Avrami-Erofeev equation of f(α)=1.5(1-α)[-ln(1-α)]1/3. The superthermite Al/Fe2O3 can reduce the activation energy of the decomposition reaction, the thermal ignition temperature and the critical temperature of thermal explosion of NC,and it plays a crucial role in promoting the O-NO2 bond cleavage of NC and secondary autocatalytic reactions in condensed phase.关键词
超级铝热剂/硝化棉/NC/超声分散法/热分解/TG-FTIR/纳米Fe2O3/水热法Key words
superthermite/nitrocellulose/NC/ultrasonic dispersion method/thermal decomposition/TG-FTIR/nano-Fe2O3/hydrothermal method分类
军事科技引用本文复制引用
赵宁宁,马海霞,安亭,赵凤起,胡荣祖..超级铝热剂Al/Fe2O3对硝化棉热分解特性的影响[J].火炸药学报,2016,39(5):84-92,9.基金项目
国家自然科学基金(No.21373161) （No.21373161）
国防科技重点实验室基金(9140C3501041001) （9140C3501041001）
