CHINESE JOURNAL OF ENERGETIC MATERIALS
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高燃烧效率含卤氧化剂包覆硼粉的制备及性能
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西北工业大学 固体推进全国重点实验室

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国家自然科学基金(U2030202)


Preparation and Properties of Halogenated Oxidant Coated Modified Boron with High Combustion Efficiency
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National Key Laboratory of Solid Rocket Propulsion, Northwestern Polytechnical University, Xi′an 710072, China

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    摘要:

    为了提升硼粉的点火燃烧性能,采用高能球磨与喷雾干燥相结合的技术制备了4种微纳米B-Fe-Bi2O3@AP/PVDF复合物,根据其高热值和高燃烧效率的特点将四种复合物命名为μBHHc、μBHCe、nBHHc及nBHCe,并对其形貌结构、热反应性、点火延迟、质量燃速和凝聚相产物进行了表征分析。结果表明,μBHHc和μBHCe复合物在氩气中最大热值达9.7 kJ·g-1,最高燃烧效率达66.2%;在氧气中最大热值达14.6 kJ·g-1,最高燃烧效率达93.3%,空气中氧化峰温在750~760 ℃之间。nBHHc和nBHCe复合物在氩气中最大热值达9.9 kJ·g-1,最高燃烧效率达68.9%;在氧气中最大热值达14.8 kJ·g-1,最高燃烧效率达97.2%,空气中氧化峰温在595~600 ℃之间。各类复合物的最高燃烧温度达1954~2011 ℃,其中nBHHc复合物的点火延迟最短(26 ms),且质量燃速最高(1.84 g·s-1);μBHCe复合物的点火延迟最长(39 ms),质量燃速也最低(0.80 g·s-1)。各类复合物燃烧产物主要由B2O3、B4C及少量未完全燃烧的硼组成,形貌包含5~10 μm的球体及10~20 μm的片状物质。

    Abstract:

    In order to improve the ignition and combustion performance of boron powder, four kinds of micro- and nano B-Fe-Bi2O3@AP/PVDF composite were prepared by high-energy ball milling combined with spray drying method. According to their high calorific value and high combustion efficiency, four composite were named as μBHHc, μBHCe, nBHHc, and nBHCe. Their morphology, thermal reactivity, ignition delay time, mass burning rate and condensed phase combustion products were characterized and analyzed. The results show that the maximum calorific value of μBHHc and μBHCe composite in argon is 9.7 kJ·g-1, and the maximum combustion efficiency in argon is 66.2 %. The maximum calorific value in oxygen is 14.6 kJ·g-1, the maximum combustion efficiency is in oxygen 93.3%, and the oxidation peak temperature is between 750 ℃ and 760 ℃. The maximum calorific value of nBHHc and nBHCe composite in argon is 9.9 kJ·g-1, and the maximum combustion efficiency is in argon 68.9%. The maximum calorific value in oxygen is 14.8 kJ·g-1, the maximum combustion efficiency in oxygen is 97.2%, and the oxidation peak temperature is between 595 ℃ and 600 ℃. The highest combustion temperature of all kinds of composite is between 1954 ℃ and 2011 ℃. The ignition delay time of nBHHc composite is the shortest (26 ms), while the mass burning rate is the highest (1.84 g·s-1). The μBHCe composite has the longest ignition delay time (39 ms) and the lowest mass burning rate (0.80 g·s-1). The condensed phase combustion products of various composites are mainly composed of B2O3, B4C and a small amount of incompletely burned boron. The morphology of condensed phase combustion products includes 5-10 μm spheres and 10-20 μm flakes.

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刘睿,杨丹锋,张云龙,等. 高燃烧效率含卤氧化剂包覆硼粉的制备及性能[J]. 含能材料,DOI:10.11943/CJEM2024062.

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  • 收稿日期: 2024-02-08
  • 最后修改日期: 2024-06-23
  • 录用日期: 2024-05-31
  • 在线发布日期: 2024-06-04
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