采用溶胶—凝胶法，用γ－ＡｌＯＯＨ溶胶涂在镍金属支撑层上，能够生成γ－Ａｌ２Ｏ３的复合分离膜。分离膜厚度随涂层次数和溶胶浓度不同为５～８μｍ，平均孔径约为３ｎｍ。分离膜的渗透值随涂层次数增加而下降，并趋于平缓，为（１～５）×１０－６ｍｏｌ／（ｓ·Ｐａ·ｍ２），而分离性能则上升，在压力为３０ｋＰａ时的分离系数达３。采用改善了的抽滤涂层方法使渗透值和分离性能又得到提高，并能使γ－Ａｌ２Ｏ３与金属支撑层较好地结合。 Using sol-gel method, γ-AlOOH sol coated on the nickel metal support layer, can generate γ-Al2O3 composite separation membrane. The thickness of the separation membrane varies with the number of coating and sol concentration of 5 ~ 8μm, the average pore size of about 3nm. The permeation value of the separation membrane decreased with the increase of the number of coating and tended to be flat (1 ~ 5) × 10-6mol / (s · Pa · m2), while the separation performance increased while the pressure was 30kPa The coefficient of 3. The improved suction-filtration coating method results in improved permeability and separation performance and better incorporation of [gamma] -Al2O3 into the metal support layer.