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Reaction of Al Powder and Water Visa Electrochemistry Technology
Author(s): 
Pages: 262-267
Year: Issue:  2
Journal: Chinese Journal of Energetic Materials

Keyword:  材料科学铝水反应电化学热力学纳米铝微米铝;
Abstract: 为评价Al-H2O反应中铝粉的燃烧效率,从电化学角度对粒径为50 nm,2μm,13 μm和29 μm的铝粉进行水反应研究.通过测定不同温度下铝水反应极化曲线,初步建立起使用电化学参数(腐蚀电位,腐蚀电流密度,腐蚀电位温度系数)表征铝水反应的评价体系.拟合分析了实验数据,探讨了粒径和温度对铝水反应的影响.用法拉第定律和吉布斯-亥姆霍兹方程对反应进行了电化学热力学研究.结果表明,随着铝粉粒径的减小,反应的腐蚀电位减小,反应越容易进行.当粒径小于2 μ,m时,粒径的减小对腐蚀电位的影响更加明显.25℃下50 nm的Al粉在铝水体系中燃烧效率即可达90.6%,远高于2μm Al粉的66.7%.
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