球磨法制备Fe2O3掺杂纳米铝热剂及其燃烧性能

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.