【摘要】 用锶、钡的有机酸盐和钛酸丁酯为原料,以溶胶-凝胶法制备了钛酸锶钡溶皎。考察了有机酸分子量、溶胶的水解方法对溶胶亲润性、湿敏性、二氧化碳敏感性、成膜均匀性、热解性等的影响。实验得出:先将钛酸丁酯的乙酸乙酯溶液部分水解,然后与锶、钡的正辛酸盐、2-乙基己酸盐或壬酸盐的乙酸乙酯溶液充分混合,所得的溶胶具有较好的综合性能。更多还原

【Abstract】 Using organic salts of strontium and barium with titanium butoxide as precursors, the solution of Sr -modified BaTiO3 were prepared successfully. The effect of organic acid and the preparing procedures on the properties (such as stickiness, moist - sensitivity, CO2 - sensitivity) of solutions was detected. The results show that the qualified solutions could be prepared by hydrolyzing titanium butoxide in ethyl acetate partially and then mixing the former with the Ba and Sr organic salts (CxH2xCOO-, x = 7 - 8) in the same solvent sufficiently. Using the solutions, Pt/BST/Al capacitor and Si/BST/Al capacitor were prepared. The dielectric constant of BST is about 280 on Pt and 96 on Si. The leakage current of capacitors is lower than 10-8A/cm2 for 0.56 μm BST film.更多还原