【摘要】 通过共沉淀法制备了钛酸 超细粉体，并研究了其前驱体的晶化过程和粉体的烧结行为．研究结果表明该方法能够明显降低钛酸 的合成温度，在 ６００℃已能得到比表面积为 １２ｍ２／ｇ（粒度约为 １００ｎｍ）无团聚的高纯超细钛酸 粉体．该粉体具有较高的烧结活性，在９５０℃烧结即可致密化．更多还原

【Abstract】 Ultrafine Bi4 Ti3O12 powder was prepared by a coprecipitation method and its phase evolution process and sintering behavior were investigated. The results show that the synthetic temperature of Bi4 Ti3O12 is lowered significantly due to homogeneous mixing of Ti and Bi com- ponents in the precursor mixture, and phase pure Bi4Ti3O12 powder can be produced after aging at 600 ℃ . The powder obtained consists of irregular-shaped particles of about 100nm and is nearly aggregate free. Dense Bi4Ti3O12 ceramics can be prepared at a considerably low temperature of 950 ℃ , indicating the high sinterability of the powder.更多还原