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为探索纳米催化剂的分散技术,设计并制备了由惰性组分和纳米颗粒铜铬氧化物(CC)组成的一种纳米结构催化剂(ns-CC)。研究了铜铬氧化物前驱体铬酸铜铵(CAC)的热解条件对纳米结构催化剂中CC晶粒尺寸的影响。XRD分析结合TEM观察表明升温速率增大,粒径变小,但保温时间在一定范围内对晶粒的影响不明显。ns-CC对AP催化热分解结果显示加入少量的ns-CC使AP的高温分解峰温提前95℃,且大幅增加AP的表观放热量。在RDX/AP/A l/HTPB推进剂中,添加0.5%的ns-CC和普通CC时,6MPa下燃速由基础配方的6.31mm/s分别提高到8.82和8.69mm/s,4~10MPa范围内压力指数由基础配方的0.35分别升高到0.38和0.49。初步研究表明,ns-CC是一种具有较大潜力的值得深入研究的推进剂燃烧催化剂。
In order to explore the dispersion technology of nano-catalysts, a nanostructured catalyst (ns-CC) composed of inert components and nanoparticulate copper-chromium oxide (CC) was designed and prepared. The effects of the pyrolysis conditions of cupric chromium oxide precursors, copper citrate (CAC), on the CC grain size in nanostructured catalysts were investigated. The results of XRD and TEM show that the heating rate increases and the particle size decreases. However, the effect of holding time on the grain is insignificant. The results of ns-CC pyrolysis of AP showed that the addition of a small amount of ns-CC advanced the pyrolysis peak temperature of AP by 95 ℃, and significantly increased the AP exothermic. In the RDX / AP / Al / HTPB propellant, the addition of 0.5% ns-CC and ordinary CC, the burning rate of 6MPa increased from 6.31mm / s of the basic formula to 8.82 and 8.69mm / s respectively, Within the range of pressure index from the basic formula of 0.35 were increased to 0.38 and 0.49. Preliminary studies have shown that ns-CC is a promising propellants combustion catalyst with great potential.