Abstract
In order to explore the thermal kinetics of nano Al-micro MnO2 thermite system, the Al/MnO2 thermite sample was mixed by the ultrasonic dispersion method. On the basis of the study of thermal decomposition of MnO2 powder, the thermal performance of the sample was study by simultaneous thermal analysis technique at the temperature range from room temperature to 1000°C, which could found the thermite reaction occurred in 650-660°C before the melting of Al, which belongs to solid state reactions with the 350 J/g heat releasing. Besides, the microstructure changes of the thermite during reaction were observed by field emission scanning electron microscope (FE-SEM). Based on the TG-DSC test with multiple heating rates and using of the activation energy calculated by Kissniger method, it could be proved the sample had good stability and safety performance.
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