【摘要】 柠檬酸盐溶胶-凝胶法制备钛酸钡粉体具有操作简单、粉体粒度细小、生产成本低的特点,但是制备过程中胶体的稳定性很难控制,限制了其方法的发展。根据胶体的形成机理和条件,对目前的研究工艺进行优化,制备过程中不引入H+和NO3-,在提高胶体稳定性的基础上,于700℃左右煅烧获得了各向同性、粒径约20nm的四方相Ba-TiO3粉体,解决了普遍存在的BaTiO3粉体粒径细小与四方相的矛盾,煅烧温度也较常规方法明显降低。更多还原

【Abstract】 The method of preparing barium titanate powder by citrate Sol-Gel is simple and the powder got by this way is finer and cheaper than the other ways,but the characteristic of sol-gel system is not steady,so the method can’t be developed rapidly.We raised the technique by without introducing H+ and NO3-ions in the preparation process in this paper.The quality of the sol-gel system was enhanced,and the square crystalloid nanometer barium titanate powder was gained after being calcined at 700℃ by the improved citrate Sol-Gel method.The temperature is far lower than the routine method.The powder’s average size is about 20nm.更多还原