Abstract: A polyaluminium chloride solution with high Al13 content self-prepared was used as material for preparing the spherical γ-Al2O3 by sol-gel method and oil-drop method. Polyethylene glycol with different molecular weight was used as surfactant to investigate the effect on property of γ-Al2O3. The physical property was characterized by 27Al NMR spectra, X-ray diffraction, FT-IR and TG-DTA. The results showed that surface area, pore volume and pore size of γ-Al2O3 all increased with the increase of polyethylene glycol molecular weight in the experimental research range, polyethylene glycol 10000 was the most suitable pore forming additive in experimental research range. γ-Al2O3 with surface area of 339 m2∙g-1, pore volume of 0.59 cm3•g-1 and pore diameter of 6.9nm were obtained at 450℃.

摘要： 本文中采用实验室自制的一种高Al13含量的聚合氯化铝作为原料，通过溶胶-凝胶法和油滴法相结合来制备球形γ-Al2O3。实验中研究了不同分子量的聚乙二醇作为表面活性剂对γ-Al2O3性质的影响。采用NMR、XRD、FT-IR和TG-DTA等分析手段对所制得的铝样品进行分析表征。结果表明，在实验所研究的范围内，样品的表面积，孔体积和孔径都随着聚乙二醇分子量的增加而增加，聚乙二醇10000是最好的表面活性剂，样品经450℃焙烧后所得的γ-Al2O3的表面积为339 m2∙g-1, 孔体积为 0.59 cm3•g-1，孔径为6.9nm。

关键词: γ-氧化铝, 聚合氯化铝, 制备, 聚乙二醇