论文部分内容阅读
采用热分析仪和可视化管式炉研究了添加KNO3对纳米铝粉在CO2气氛中的热反应特性和点火燃烧特性的影响.结果表明,随KNO3添加量增加,纳米铝粉着火点降低.添加1%和5%(?)KNO3可分别使着火点温度降低18.3和37.9℃,并使燃烧特性指数增加,但增加程度逐渐降低.添加KNO3可加速纳米铝粉在CO2气氛中的点火过程,使铝粉氧化反应更剧烈.添加KNO3后纳米铝粉的燃烧产物中除有大量?-Al2O3与少量单质Al外,还存在部分?-Al2O3.
The effects of adding KNO3 on thermal reaction and ignition and combustion characteristics of nano-aluminum powder in CO2 atmosphere were investigated by means of thermal analyzer and visualized tube furnace.The results showed that the ignition point of nano-aluminum powder decreased with the increase of KNO3 addition.The addition of 1% And KNO3 (5%) decreased the ignition temperature by 18.3 and 37.9 ℃, respectively, and increased the combustion index, but the degree of increase decreased gradually.Adding KNO3 accelerated the ignition process of aluminum nanopowder in CO2 atmosphere, Reaction more intense.After adding KNO3 nano aluminum powder combustion products in addition to a large number of -Al2O3 and a small amount of elemental Al, there are still some -Al2O3.