摘要硼具有燃烧热值高、燃烧产物清洁等优点,但其表面易被氧化,导致燃烧效率降低,硼作为含能材料的优势无法体现。采用了镁粉和铝粉作为包覆剂,运用湿法球磨对老化硼粉进行包覆以达到表面改性的目的。分别研究了利用乙醇、正己烷及油酸作为溶剂,以及镁铝总含量不同时通过湿法球磨制得的硼镁铝复合材料的改性效果。通过扫描电镜(SEM)对包覆后硼粉的颗粒表面形态的变化进行了表征,发现镁铝含量为15%时乙醇磨后制得的复合材料表面包覆效果最好,且粒度理想。通过TG-DSC对所制得的硼镁铝复合材料进行了热分析,配制了不同配比的硼镁铝/BaCrO4延期药,研究了其燃速变化,硼镁铝/BaCrO4延期药的燃速明显大于B/BaCrO4延期药。并采用Ozawa法计算了硼镁铝/BaCrO4延期药反应的动力学参量,对比发现其氧化反应需要活化能远低于B/BaCrO4延期药,可见改性处理过后的硼粉具有更优良的燃烧性能。63828
毕业论文关键词 硼 含能材料 镁粉 铝粉 包覆
毕业设计说明书外文摘要
Title Prepare Mg/Al/B Composite Materials and Study its Combustion Characteristics
Abstract Boron has advantage of a high heat of combustion, clean combustion products, etc., but its surface is easily oxidized, resulting in combustion efficiency, the advantage of boron to be energetic materials can not be reflected. In this paper, magnesium and aluminum powder are used as coating agent, use wet milling on the aged boron powder to coat it to modify the surface characteristics. We studied different results of each sample using ethanol, n-hexane, oleic acid as solvent, and the total content of Mg and Al is not the same. By scanning electron microscopy(SEM), we found that when the Mg/Al content is 15% and miliing with ethanol, the material get the best quality and the size is the smallest. Using Ozawa method calculate the kinetic parameters of obtained material/delay powder. It can be found that the activation energy the obtained material required is much lower than B/BaCrO4, it is visible that modified boron powder has better combustion performance.
Keywords Boron; Energetic matierials; Magnesium; Aluminum; Coat
1 绪论 1
1.1 硼的表面改性方法 1
1.2 硼的报复材料选择 2
1.2.1 表面包覆处理要求 2
1.2.2 包覆材料的选择 2
1.3 硼掺杂金属粉 3
1.3.1 金属粉在含能材料中的作用 3
1.3.2 金属粉的燃烧 3
1.3.3 铝粉在燃料中的应用 4
1.3.4 镁粉在燃料中的应用 4
1.4 本论文主要研究工作 4
2 硼基复合材料的制备 5
2.1 实验药品及仪器 5
2.2 球磨工艺选择 5
2.3 硼镁铝复合材料的形貌表征 7
3 硼镁铝复合材料的燃烧活性研究 8
3.1 热分析动力学简介 8
3.2 硼镁铝复合材料的动力学研究环境 9
3.3 硼粉的热分析