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In this study, CoFe 2 O 4 is selected for the first time to synthesize CoFe 2 O 4 /Al nanothermite films via an integration of nano-Al with CoFe 2 O 4 nanowires (NWs), which can be prepared through a facile hydrothermal-annealing route. The resulting nanothermite film demonstrates a homogeneous structure and an intense contact between the Al and CoFe 2 O 4 NWs at the nanoscale. In addition, both thermal analysis and laser ignition test reveal the superb energetic performances of the prepared CoFe 2 O 4 /Al NWs nanothermite film. Within different thicknesses of nano-Al for the CoFe 2 O 4 /Al NWs nanothermite films investigated here, the maximum heat output has reached as great as 2100 J·g -1 at the optimal thickness of 400 nm for deposited Al. Moreover, the fabrication strategy for CoFe 2 O 4 /Al NWs is also easy and suitable for diverse thermite systems based upon other composite metal oxides, such as MnCo 2 O 4 and NiCo 2 O 4 . Importantly, this method has the featured advantages of simple operation and compatibility with microsystems, both of which may further facilitate potential applications for functional energetic chips.

A Facile Preparation and Energetic Characteristics of the Core/Shell CoFe2O4/Al Nanowires Thermite Film