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在勃姆石Ａ１ＯＯＨ溶胶中引入一定量的Ｈ２ＢＯ３溶液，经不同温度的热处理，制成不同硼掺杂含量的无支撑的γ－Ａｌ２Ｏ３催化膜．用ＸＲＤ、ＢＥＴ分别对膜的晶相和膜的微孔结构，包括比表面积、孔径和孔容进行了研究，结果发现：随着硼含量的增加，在低温下，膜的比表面积和孔容都不断增加，而对孔径的影响不大；经１２００℃处理后，未掺杂硼的膜的比表面积，孔径和孔容分别为 ５．４ｍ２／ｇ， ４９ｎｍ和 ０．０６３ｃｍ３／ｇ，而经掺杂 １６％摩尔硼的膜的比表面积，孔径和孔容分别为 ３５ｍ２／ｇ， １３ｎｍ和 ０．２２５ｃｍ２／ｇ，这说明硼的掺杂对 γ－Ａｌ２Ｏ３膜的热稳定性有很好的改善作用．
A certain amount of H2BO3 solution was introduced into the boehmite A1OOH sol, and the unsupported γ-Al2O3 catalyst films with different boron doping content were prepared by heat treatment at different temperatures. The crystal phase and the microporous structure of the membrane, including specific surface area, pore size and pore volume, were investigated by XRD and BET. The results showed that with the increase of boron content, the specific surface area and pore volume The pore diameter and pore volume were respectively 5.4m2 / g, 49nm and 0.063cm3 / g after treatment at 1200 ℃, and the specific surface area, The specific surface area, pore diameter and pore volume of the film doped with 16% by mole of boron were 35 m 2 / g, 13 nm and 0.225 cm 2 / g, respectively, indicating that boron doping had a good improvement on the thermal stability of the γ-Al 2 O 3 film effect.