球磨法制备Fe_(2)O_(3)掺杂纳米铝热剂及其燃烧性能

Combustion Performance of Fe_(2)O_(3) containing Nanothermites Prepared by Ball Milling Method

近年来,广大学者已经研究了多种方法来制备纳米铝热剂和改善其燃烧性能。本研究分别采用原位球磨法和超声共混法成功制备了两种含Fe2O3纳米铝热剂。通过热重分析(TGA)、函数拟合、X射线衍射(XRD)、接触角测试、扫描电子显微镜测试(SEM)、高速摄像实验和红外温度测量充分表征了所制备产品的形貌和性能。结果表明,通过原位球磨法制备的Fe2O3掺杂的纳米铝热剂的性能要优于超声共混法制备的铝热剂。通过对Fe2O3掺杂量的筛选发现,原位球磨法制备的纳米铝热剂的Fe2O3最优掺杂量为17%,该产物每100℃最大增重百分比为13.1%。与超声共混法制备的纳米铝热剂相比,原位球磨法制备的纳米铝热剂的加热电压和初始燃烧温度分别降至12 V和600℃。此外,原位球磨法制备的纳米铝热剂的燃烧火焰更稳定和均匀。

Various preparation methods have been widely explored to improve the combustion performance of nanothermites in recent years.In this work,two kinds of Fe2O3?containing nanothermites were successfully prepared by in situ ball milling method and conventional ultrasonic blending method respectively.The morphologies and performance of as?prepared products have been fully characterized by thermogravimetric analysis(TGA),X?ray diffraction(XRD),contact angle tests,scanning electron microscopy(SEM),high?speed imaging experiments and infrared temperature measurement.The results show that the Fe2O3?doped nanothermites via in situ ball milling method exhibit better performance than that made by ultrasonic blending method.The optimal nanothermites with 17%Fe2O3 doped amount possess the maximum mass gain percentage of 13.1%per 100℃.Compared with the products made by ultrasonic blending method,the heating voltage and initial combustion temperature of in situ ball milled nanothermites decrease to 12 V and 600℃,respectively.In addition,the combustion flame of in situ ball milled nanothermites is more stable and homogeneous than the corresponding one.