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含能材料  2005 

纳米Al粉的热脱附研究(英)

Keywords: 物理化学,Al,纳米尺寸,热作用,脱附,动力学

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Abstract:

纳米Al粉有独特热行为,能增强某些含能材料的性能。然而,纳米Al粉与水的反应性高,导致纳米Al粉“老化”,降低了它在含能复合材料中的作用。由于纳米Al粉的老化反应与吸附至其表面的水有关,因此应特别关注水的吸、脱附作用。本文用TG和TG-FTIR-MS研究了纳米Al粉吸附气体的热脱附。结果表明,所研究的纳米Al粉含12%(质量)的吸附气体。用FTIR和MS检测到水和CO2的脱附。用多重加热速率和等温研究,得到了吸附气体的脱附过程动力学参数。对不同方法得到的脱附活化能进行了比较。

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