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 proper-ties 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 param-eters 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 pro-motes 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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