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以无水氯化铝、无水氯化镁为前驱体和无水乙醇为氧供体,采用非水解溶胶-凝胶法合成镁铝尖晶石纳米粉体,利用XRD、SEM和激光粒度等表征了粉体晶相、颗粒粒径与形貌及烧结性能。结果表明,在900℃可合成单一镁铝尖晶石纳米粉体,一次粒子平均粒径为50nm左右,存在可通过球磨消除的软团聚,在1600℃烧结3h可以得到气孔少、颗粒结合紧密、相对致密的镁铝尖晶石烧结体。
Using anhydrous aluminum chloride, anhydrous magnesium chloride as precursor and anhydrous ethanol as oxygen donors, the non-hydrolytic sol-gel method was used to synthesize Mg-Al spinel nano-powders. The XRD, SEM and laser particle size Powder crystal phase, particle size and morphology and sintering properties. The results show that the single magnesium aluminate spinel nanopowder can be synthesized at 900 ℃. The average particle size of the primary particles is about 50 nm. There is soft agglomeration which can be eliminated by ball milling. Sintering at 1600 ℃ for 3h can result in fewer pores, Relatively dense magnesium aluminum spinel sintered body.