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采用溶胶—凝胶法，分别研究了用三种起始物异丙醇铝［Ａｌ（ＯＣ３Ｈ７ｉ）３］、氯化铝（ＡｌＣｌ３·６Ｈ２Ｏ）、硝酸铝［Ａｌ（ＮＯ３）３·９Ｈ２Ｏ）］，制备碳纤维三维编织物增强复合材料用氧化铝基体及涂层的工艺，考察了三种体系反应物配比、水解温度、反应时间等因素对制得的三种溶胶体系性能的影响，获得了较佳的溶胶配制参数；还考察了三种溶胶体系在通常情况下和在编织物中的凝胶化情况，获得了较佳的凝胶化条件；同时还研究了不同条件下三种凝胶的裂解产物及其晶体类型。结果表明，不管经过何种途径，凝胶在经１２６０℃裂解后均可获得α－Ａｌ２Ｏ３。
Three kinds of aluminum isopropoxide [Al (OC3H7i) 3], aluminum chloride (AlCl3 · 6H2O), aluminum nitrate [Al (NO3) 3 · 9H2O)] were synthesized by sol-gel method. Preparation of three-dimensional carbon fiber braided composite reinforced with alumina matrix and coating process, investigated the three system reactant ratio, hydrolysis temperature, reaction time and other factors on the performance of the three sol system, obtained more Good sol formulation parameters; also studied the three sol systems in the normal circumstances and in the braid gelation conditions, to obtain a better gelation conditions; also studied under different conditions, three kinds of gel Pyrolysis products and their crystal types. The results showed that α-Al2O3 was obtained after the gel was cracked at 1260 ℃, no matter what route.