论文部分内容阅读
研究了存储环境湿度对碳包覆纳米铝粉活性的影响,并对其变化机理进行了较深入的探讨。通过DSC-TG分析及热学参数(Ton,Tpeak,△H,△m)的提取,表明随着环境湿度的增加,碳包覆纳米铝粉的活性降低。通过XRD,TEM,HRTEM等仪器分析,表明造成铝粉活性降低的原因主要是包覆在纳米铝粒子表面的碳膜存在缺陷,导致内核铝被水解和氧化。但是对比钝化纳米铝粉在高湿度条件下的表现可知,在高湿度条件下防止纳米铝粉老化方面,碳包覆的确优于钝化包覆。
The effect of storage environment humidity on the activity of carbon-coated aluminum nanopowders was studied, and the changing mechanism was discussed in depth. The results of DSC-TG analysis and thermal parameters (Ton, Tpeak, △ H, △ m) showed that the activity of carbon-coated aluminum nanopowders decreased with the increase of ambient humidity. By XRD, TEM, HRTEM and other instrumental analysis, it is indicated that the reason for the decrease of the activity of the aluminum powder is that the carbon film coated on the surface of the nanoaluminum particles is deficient, resulting in hydrolysis and oxidation of the core aluminum. However, comparing the performance of passivated nano-aluminum powder under high humidity conditions, it can be seen that carbon coating is better than passivation coating in preventing nano-aluminum powder from aging under high humidity conditions.