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纳米MgAl_2O_4粉体的溶液燃烧合成及烧结性能(英文)

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Abstract:

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(01,29和11)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。

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