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用高分子网络凝胶法制备Ａｌ２Ｏ３粉体，通过网络的阻碍作用，阻止Ａｌ２Ｏ３的团聚，获得颗粒大小在 １０ｎｍ左右的α－Ａｌ２Ｏ３粉体，其煅烧温度比通常低 １００℃．
Al 2 O 3 powders were prepared by polymer network gel method. The agglomeration of Al 2 O 3 was prevented by the obstruction of the network. The α-Al 2 O 3 powders with the particle size of 10 nm were obtained. The calcination temperature was lower than 100 ℃.