Spin-coating preparation of micro-and nano-thermite films and their combustion performances

The micro-and nano-thermite films are prepared using spin-coating with fluorine rubber as a binder. Ensuring the integrity of films, the mass content of fluorine rubber is minimized by controlling the spin-coating process. The minimum mass content of fluorine rubber is observed to be 7% through scanning electron microscope. The thermophysical properties of thermite films are tested using heat flux method. The measured thermal conductivity of Al/MoO₃/FE film is 75 W/(m·K), and the burning rate is 30.6 m/s. Surprisingly, the thermal conductivity reaches to 126 W/(m·K), and the burning rate is increased to 867.9 m/s after appending reduced graphene oxide. The ignition test results of metal bridge show that micro-and nano-thermite films could improve the combustion performance of thermite and the ignition performance.