以氯化铁为前驱物,采用溶胶-凝胶法制备了 Al/Fe2O3纳米铝热剂.用XRD、TGA/DSC研究了煅烧温度和煅烧时间对Al/Fe2O3纳米铝热剂晶型结构和热性能的影响.结果表明,在相同煅烧时间内,Al晶粒尺寸随煅烧温度的增加而减小,铝热剂固固反应的放热量先增加后减小；在相同煅烧温度下,Al/Fe2O3热失重随煅烧时间的增加而减小,铝热剂固固反应放热量增加,热失重控制在2.2％以内,铝热剂固-固反应的放热量提高30％.Al/Fe2O3的最佳燃烧温度和燃烧时间为300℃下煅烧5h.%The Al/Fe2O3 nano-thermites were prepared by sol-gel method using FeCl3·6H2O as precursor. The effects of calcination temperature and calcination time on the crystal structure and thermal performance of Al/Fe2O3 nano-thermites were investigated by XRD and TGA/DSC. The results show that, in the same calcination time, the crystal grain size of Al decreases with increasing the calcination temperature, and the heat releases of the nano-thermites solid-solid reaction first increases and then decreases. At the same calcination temperature, the mass loss decreases to 2. 2% with the calcination time increasing, while there is a 30% increase in heat releases of the nano-thermites. The optimal calcinaion temperature and time were 300℃ and 5h, respectively.
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