报导了前驱体溶液的ｐＨ值对Ｂｉ－Ｔｉ溶液的水解特性的影响，并探讨了乙醇胺的催化作用机理。研究表明，乙醇胺可调节溶液的ｐＨ值，其机理是与ＨＡｃ反应，并与Ｂｉ＋离子生成稳定的络合物．前驱体溶液的ｐＨ值是决定溶胶、凝胶质量的主要因素．ｐＨ值较小时，溶液容易产生沉淀；ｐＨ值较大时，溶液中有大量的浑浊物；只有ｐＨ值在２．５～４之间的溶液才能形成均匀稳定的溶胶和凝胶 The effect of pH value of precursor solution on the hydrolysis of Bi-Ti solution was reported. The catalytic mechanism of ethanolamine was also discussed. Studies have shown that ethanolamine can adjust the pH of the solution by reacting with HAc and generating a stable complex with Bi + ions. The pH value of the precursor solution is the main factor that determines the sol and gel quality. When the pH value is low, the solution tends to precipitate; when the pH value is high, there is a lot of turbidity in the solution; only a solution with a pH between 2.5 and 4 can form a uniformly stable sol and gel