In order to study the application of bimetallic oxidants as combustion catalysts in propellants, a bimetallic oxidant FeCo2O4 was prepared using hydrothermal method. The physical and chemical properties of the catalyst were characterized using scanning electron microscopy (SEM), N2 adsorption and desorption testing (BET), X-ray diffraction analysis (XRD) and X-ray photoelectron spectroscopy (XPS). The catalytic decomposition characteristics and thermal decomposition reaction kinetics parameters of 5,5’-tetrazol-1,1’-dioxodihydroxylamine (TKX-50) were studied using a synchronous thermal analyzer (TG-DSC). The results showed that the addition of bimetallic oxidant FeCo2O4 significantly promotes the thermal decomposition behavior of TKX-50. With the increase of bimetallic oxidant content, at 10.0 ℃·min-1 of the heating rate, the peak temperatures of the two exothermic peaks of the composite material show a decreasing trend, with maximum reductions of 34.0 ℃ and 49.7 ℃, respectively.The addition of bimetallic oxidants also reduces the apparent activation energy and activation enthalpy of the composite system. The decrease in the thermodynamic characteristic parameters of TKX-50 confirms the potential of bimetallic oxidant combustion catalysts.
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