This investigation was devoted to exploring the application performance of nano-combustion catalyst CuCr₂O₄ in solid propellants. In this paper, raw CuCr₂O₄ and nano-CuCr₂O₄ prepared by the mechanical grinding method were applied in solid propellants containing ammonium perchlorate (AP), which are ammonium perchlorate/ hydroxy-terminated polybutadiene propellant (AP/HTPB) and ammonium perchlorate/composite modified double-base propellant (AP/CMDB). And the scanning electron microscope, displacement volume method, thermogravimetric analysis, differential scanning calorimetry, and strand burner method were employed to characterize the performance of AP-based solid propellants. The results show that the AP/HTPB propellant has fewer defects on the surface of it due to the presence of nano-CuCr₂O₄, but it has no significant effect on the AP/CMDB propellant. Nano-CuCr₂O₄ can also significantly increase the density of AP/HTPB propellant and AP/CMDB propellant to 1.736 g/cm³ and 1.633 g/cm³, respectively. Nano-CuCr₂O₄ obviously advances the decomposition temperature of AP/HTPB propellant and AP/CMDB propellant, which also increases the apparent heat of decomposition. In addition, the burning rate of nano-CuCr₂O₄-AP/HTPB propellant and nano-CuCr₂O₄-AP/CMDB propellant increased to 1.60 mm/s and 3.23 mm/s, with an increase of 28.3 % and 26.3 %, respectively. Therefore, nano-CuCr₂O₄ is expected to be widely used in solid propellants due to its excellent properties.

中文翻译：

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纳米铬铁矿对AP基固体推进剂热分解燃烧的影响

本研究致力于探索纳米燃烧催化剂CuCr ₂ O ₄在固体推进剂中的应用性能。在本文中，原料CuCr ₂ O ₄和纳米CuCr ₂ O ₄采用机械研磨法制备的高氯酸铵（AP）固体推进剂分别为高氯酸铵/端羟基聚丁二烯推进剂（AP/HTPB）和高氯酸铵/复合改性双基推进剂（AP/CMDB）。并采用扫描电镜、置换体积法、热重分析、差示扫描量热法和线束燃烧器法对AP基固体推进剂的性能进行了表征。结果表明，AP/HTPB推进剂由于纳米CuCr ₂ O ₄的存在，其表面缺陷较少，但对AP/CMDB推进剂的影响不显着。纳米CuCr ₂ O ₄还可以将AP/HTPB推进剂和AP/CMDB推进剂的密度分别显着提高到1.736 g/cm ³和1.633 g/cm ³。纳米CuCr ₂ O ₄明显提高了AP/HTPB推进剂和AP/CMDB推进剂的分解温度，也增加了表观分解热。此外，纳米CuCr ₂ O ₄ -AP/HTPB推进剂和纳米CuCr ₂ O ₄ -AP/CMDB推进剂的燃烧速率分别提高到1.60 mm/s和3.23 mm/s，分别提高了28.3%和26.3%。 ％， 分别。因此，纳米CuCr ₂ O ₄由于其优异的性能，有望广泛用于固体推进剂。