关键词: 固体推进剂;燃烧催化剂;纳米结构铜铬氧化物+

Abstract: A novel nano-structured Copper-Chromium oxide(ns-CC),which consisted of Copper-Chromium oxide(CC) nano particles and an inert component,was prepared to solve the aggregation problem of nano particles.It was studied that the effect of pyrolytic conditions of copper ammonium chromate precursor on the particle size of CC in ns-CC.Upon XRD analysis and TEM observation.The results show that particle size of CC decreases as heating rate increases and holding time at maximum pyrolytic temperature has no obvious influence on particle size of CC.The catalytic thermal decomposition of ammonium perchlorate(AP) with ns-CC showes that the apparent exothermic heat of AP is enhanced greatly and the decomposition temperature at high-temperature decomposition zone of AP is lowered from 446℃(pure AP) to 351℃ with addition of small amount of ns-CC.When 0.5% ns-CC and common CC(by weight) were added into RDX/AP/Al/HTPB composite propellant,the burning rates at 6MPa increased from 6.31 mm/s(without catalyst) to 8.82 and 8.69 mm/s respectively;and the pressure exponent in the range of 4~10 MPa increased from 0.35(without catalyst) to 0.38 and 0.49 respectively,implying the prosperous potential of using ns-CC as propellant catalyst.

Key words: Solid propellant;Combustion catalyst;Nano-structured copper-chromium oxide~+