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以氨基乙酸和尿素为燃料,用溶液燃烧合成法制备了 MgAl2O4 纳米粉体,并研究了氨基乙酸和尿素的摩尔比(0:1,2:9 和 1:1)对粉体特性和烧结性能的影响。对粉体的扫描电子显微照片分析发现:用两种混合燃料制备的 MgAl2O4 粉体呈多孔状结构,且实验所用混合燃料有利于 MgAl2O4粉体的分散。结果表明:颗粒(团聚体)的平均粒径随所用燃料中氨基乙酸含量的增加而明显减小,粉体的比表面积随氨基乙酸含量的增加而显著增大,表明所用的混合燃料能显著降低 MgAl2O4粉体的团聚程度。此外,MgAl2O4粉体的烧结性能随所用燃料中氨基乙酸含量的增加而显著提高。
MgAl2O4 nano-powders were prepared by solution combustion synthesis using glycine and urea as fuel, and the effects of mole ratio of glycine and urea (0: 1, 2: 9 and 1: 1) Impact. Scanning electron micrographs of the powders revealed that the MgAl2O4 powder prepared by the two kinds of mixed fuels was porous, and the mixed fuels used in the experiment were favorable for the dispersion of MgAl2O4 powders. The results showed that the average particle size of aggregates decreased with the increase of glycine content in the fuel used, and the specific surface area of the powders increased significantly with the increase of glycine content, which indicated that the fuel mixture used could decrease significantly The degree of agglomeration of MgAl2O4 powder. In addition, the sintering properties of MgAl2O4 powders increase significantly with the increase of glycine content in the fuel used.