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含能材料  2008 

纳米铝粉在环氧丙烷快速反应中的热学行为研究

Keywords: 物理化学,纳米铝粉,点火,快速反应,光谱,温度

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Abstract:

研究了入射激波作用下平均粒径75nm左右纳米铝粉与环氧丙烷快速反应中的热学特征。用光谱技术测定入射激波作用下纳米铝粉在环氧丙烷快速反应的点火延迟时间约为8μs;利用标定的ICCD光学系统采集到的AlO(B2Σ+-X2Σ+)光谱数据,计算纳米铝粉反应温度约为3189K。对反应生成物的形貌特征进行了研究,测试结果表明:反应产物多为球状颗粒,部分为絮状和针状,其平均粒径约为70nm,小于反应前纳米铝粉的平均粒径,粒径明显减小是烧结塌陷致密所致;少部分产物粒径大于100nm,粒径增大是反应物凝聚所致。

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