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Synthesis of γ-alumina via precipitation in ethanol

机译：乙醇沉淀法合成γ-氧化铝

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Nanosized γ-alumina powder was prepared via sol-gel precipitation in ethanol followed by a washing-drying treatment and caldnation. The reactant concentration, the molar ratio of reactants and the calcination temperature were inspected by homogenous design. BET, TEM, XRD and IR were used to characterize the products. The experimental results showed that ethanol can avoid hard agglomerate during precipitation and that calcination temperature was the major factor to determine the surface area, the diameter and the phase composition of the final product. When the calcination temperatures were controlled between 686-1029 ℃, the agglomerate-free nano-sized γ-alumina particles with a size range of 5-9 nm were obtained.
机译：通过在乙醇中的溶胶-凝胶沉淀，然后进行洗涤干燥处理和煅烧来制备纳米级γ-氧化铝粉末。通过均匀设计检查反应物浓度，反应物的摩尔比和煅烧温度。用BET，TEM，XRD和IR表征产物。实验结果表明，乙醇可以避免沉淀过程中的硬团聚，而煅烧温度是决定最终产品的表面积，直径和相组成的主要因素。当将煅烧温度控制在686-1029℃之间时，获得了尺寸范围为5-9nm的无团聚的纳米γ-氧化铝颗粒。

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