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以斯蒂芬酸铅作为推进剂的主要组分,硝化棉为粘接剂,通过添加高氯酸铵、细铝粉,得到了可用于MEMS-SPMT的推进剂。采用DSC研究了高氯酸铵、铝粉、硝化棉对斯蒂芬酸铅热稳定性的影响,研究了4种推进剂配方的热解特性,并利用CEA软件进行热力计算,研究了2种喷管扩张比(面积比)下4种推进剂配方的能量特性。结果表明,高氯酸铵和铝对斯蒂芬酸铅的热稳定性无明显影响,硝化棉能降低斯蒂芬酸铅的热稳定性。硝化棉与高氯酸铵质量比大的推进剂热稳定性较低。增加硝化棉、高氯酸铵的质量含量和增大喷管扩张比均能提高推进剂比冲。
Using lead acid as the main component of propellant and nitrocellulose as binder, propellants for MEMS-SPMT were obtained by adding ammonium perchlorate and fine aluminum powder. The effects of ammonium perchlorate, aluminum powder and nitrocellulose on the thermal stability of Stephenic acid lead were studied by DSC. The pyrolysis characteristics of four propellant formulations were studied. The thermal calculation was carried out by using CEA software. The effects of two kinds of nozzles Energy Properties of Four Propellant Formulas at Expansion Ratio (Area Ratio). The results show that ammonium perchlorate and aluminum have no significant effect on the thermal stability of lead stannate. Nitrocellulose can reduce the thermal stability of lead stannate. The propellants with high mass ratio of nitrocellulose to ammonium perchlorate have lower thermal stability. Increase nitrocellulose, ammonium perchlorate content and increase the nozzle expansion ratio can improve the specific impulse propellant.