关键词: 燃烧催化剂;高燃速推进剂;燃烧性能;热分解;改性双基推进剂

Abstract: The effects of different combination of organic lead salt,organic copper salt,copper-chromium oxide(C C) and iron compound on the combustion properties of a new high burning rate composite modified double base propellant were systematically investigated.The results showed that the combination of lead-iron complex and C C was an effective catalyst,and the burning rate of AP-CMDB with addition of 3% this composite catalyst increased from 48.78 mm/s(without catalyst) to 56.66 mm/s at 9.81 MPa,while the pressure exponent decreased from 0.676 to 0.576 in the range of 9.81~19.62 MPa.The effects of these combined catalysts on the decomposition of the double-based binding system(NC+NG+TEGDN) and AP were also studied via difference thermal analysis.The results revealed that the decomposition peak temperature of the double-based binding system with the combination of C C and lead-iron complex decreased by 4.94 ℃,and the second decomposition peak temperature of AP decreased by 119.08 ℃,and the apparent decomposition heat of AP increased from 144.97 J/g to 1 180 J/g.

Key words: Combustion catalyst;High burning rate propellant;Combustion performance;Thermal decomposition;Modified double base propellant