Preparation of Cu_2Cr_2O_5/SiO_2 Composite Particles and Its Effect on Combustion Characteristic of AP Composite Propellant

Cu2Cr2O5/SiO2 was prepared by the improved coprecipitation method.The particles were characterized by scanning electron microscopy(SEM) and surface area analyzer(BET),and its catalytic effect on ammonium perchlorate was studied by differential thermal analysis(DTA).The results show that the particles is well-dispersed,and larger specific surface area in comparison with pure Cu2Cr2O5,and Cu2Cr2O5/SiO2 composite particles make the temperature of the higher-temperature exothermic peak of ammonium perchlorate decrease to 323.80 ℃.So the composite particles show good catalytic performance for the thermal decomposition of ammonium perchlorate.And test of the burning rate shows that the composite particles increase the propellant burning rate by 17%,and the relative activity of catalyst increases by 49%,and the pressure index declines.