氧化铁/聚四氟乙烯对铝水推进剂燃烧性能影响

doi:10.7527/S1000-6893.2025.33343

Abstract

Abstract:

Compared with conventional solid propellants， aluminum-water propellant offers advantages such as low cost and environmentally friendly combustion products， positioning it as a new-generation green propellant. However， in practical applications， aluminum-water propellant suffers from a series of issues including low combustion efficiency and excessive product residues. The raw aluminum powder was modified by introducing iron （Ⅲ） oxide （Fe₂O₃） and the fluoropolymer Polytetrafluoroethylene （PTFE） as additives. The effects of these additives on the thermal decomposition behavior， combustion characteristics， and aluminum particle agglomeration of aluminum-water propellant were systematically investigated. The results demonstrate that both Fe₂O₃ and PTFE significantly enhance the heating rate， combustion intensity， burning rate， and combustion efficiency of the propellant， while effectively inhibiting aluminum particle agglomeration. Specifically， Fe₂O₃ exhibits the most pronounced promoting effect on burning rate， achieving an increase of up to 82%， along with a maximum reduction of 53.2% in the average diameter of combustion products and a 9.6% improvement in combustion efficiency. PTFE increases the burning rate by up to 63% and reduces the average combustion product diameter by a maximum of 46%. This study provides new insights and experimental evidence for the formulation optimization of advanced aluminum-water propellants.

Key words: aluminum water propellant, combustion performance, aluminum agglomeration, combustion products, thermal oxidation characteristic

CLC Number:

V435

Yao SHU, Yiming ZHANG, Qiu WU, Peijin LIU, Wen AO. Effect of iron oxide/polytetrafluoroethylene on combustion performance of aluminum-water propellant[J]. Acta Aeronautica et Astronautica Sinica, 2026, 47(17): 633343.

Figures/Tables 23

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样品名称	铝粉质量分数/%	添加物	添加物质量分数/%	混合铝粉中添加物质量分数/%	水质量分数/%	AP质量分数/%
对照组	45.000 0	无	0	0	50	5
TFE 1.25	44.437 5	Fe₂O₃	0.562 5	1.25	50	5
TFE 2.5	43.875 0	Fe₂O₃	1.125 0	2.50	50	5
TFE 3.75	43.312 5	Fe₂O₃	1.687 5	3.75	50	5
TFE 5	42.750 0	Fe₂O₃	3.750 0	5.00	50	5
TPT 1.25	44.437 5	PTFE	0.562 5	1.25	50	5
TPT 2.5	43.875 0	PTFE	1.125 0	2.50	50	5
TPT 3.75	43.312 5	PTFE	1.687 5	3.75	50	5
TPT 5	42.750 0	PTFE	3.750 0	5.00	50	5

样品	第1阶段		第2阶段
样品	起始温度/℃	增重率/%	起始温度/℃	总增重率/%
对照组	500.00	32.56	712.92	80.44
TFE 1.25	432.08	28.53	698.40	72.28
TFE 2.5	430.51	26.77	697.57	68.08
TFE 3.75	418.69	26.44	696.97	67.67
TFE 5	429.16	27.79	697.69	70.87
TPT 0	500.00	32.56	712.92	80.44
TPT 1.25	500.00	38.46	706.87	72.34
TPT 2.5	419.59	40.70	713.89	68.68
TPT 3.75	489.62	43.45	774.28	67.33
TPT 5	479.58	40.58	753.40	63.98

Effect of iron oxide/polytetrafluoroethylene on combustion performance of aluminum-water propellant

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