Catalytic Decomposition Characteristics and Thermodynamic Analysis of TKX-50 by FeCo2O4

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.