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为改善硼粉(B)的性能和纳米氧化铁(Fe_2O_3)在固体推进剂中的分散性,用静电喷雾法制备了B/Fe_2O_3/NC复合物,采用扫描电镜(SEM)表征了复合物的表面形貌,用TG-DSC分析了复合物的热性能及其对HTPB/AP推进剂热性能的影响,并用燃速测试和密闭爆发器实验研究了该复合物对HTPB/AP推进剂燃烧性能的影响。结果表明,所制备的B/Fe_2O_3/NC复合物均以团聚体的形式存在,复合物中B的活性提高,其氧化反应温度提前;团聚硼粉对HTPB/AP推进剂燃烧性能的改善效果明显优于原料硼粉;加入Fe_2O_3后,会进一步改善含硼推进剂的燃烧性能,而且随Fe_2O_3含量的增加,在密闭爆发器中HTPB/AP推进剂达到最高压力所需的时间逐渐减小。当Fe_2O_3的质量分数为8%时,推进剂在常压空气中的燃速最大,为不添加B/Fe_2O_3/NC复合物的HTPB/AP推进剂的2.77倍。B/Fe_2O_3/NC复合物对推进剂的热分解具有一定催化作用,且随Fe_2O_3含量的增加催化作用增强。
In order to improve the performance of boron powder (B) and the dispersibility of Fe2O3 in solid propellant, B / Fe2O3 / NC composites were prepared by electrostatic spray method and characterized by scanning electron microscopy (SEM) Surface morphology, the thermal properties of the composite and its effect on the thermal properties of the HTPB / AP propellants were analyzed by TG-DSC. The combustion performance of the HTPB / AP propellants Impact. The results show that the prepared B / Fe_2O_3 / NC composites are in the form of agglomerates, the activity of B in the composites is increased, and the oxidation reaction temperature is earlier; the effect of agglomeration boron powder on the combustion performance of HTPB / AP propellants is obvious Which is better than that of the raw material boron powder. The addition of Fe 2 O 3 will further improve the combustion performance of the boron-containing propellants. With the increase of Fe 2 O 3 content, the time required for the HTPB / AP propellant to reach the maximum pressure in the closed explosive decreases. When the mass fraction of Fe 2 O 3 is 8%, the maximum burning rate of propellant in atmospheric air is 2.77 times that of HTPB / AP without B / Fe 2 O 3 / NC composites. B / Fe 2 O 3 / NC composites have a certain catalytic effect on the thermal decomposition of propellants, and the catalytic effect increases with the increase of Fe 2 O 3 content.