回流蒸馏溶胶凝胶法制备PbZr_(0.90)Ti_(0.10)O_3-Fe_(0.003)纳米粉体  

Preparation of PbZr_(0.90)Ti_(0.10)O_3-Fe_(0.003) Nano Powder by Reflux Distillation Sol-Gel Method

作　　者：谢湘华[1] 陈建华[2] 董亚明[3] 林琳[1] 叶汝强[1] 

机构地区：[1]华东理工大学化学系 [2]华东理工大学物理系,上海200237 [3]上海师范大学生命与环境学院,上海200234

出　　处：《华东理工大学学报（自然科学版）》2006年第5期576-578,628,共4页Journal of East China University of Science and Technology

基　　金：上海市科委光科技资助项目(015261048);上海市科委纳米科技资助项目(0214nm098)

摘　　要：用回流蒸馏溶胶凝胶法(RDSG)制备了掺杂铁PbZr0.90T i0.10O3纳米粉体,粉体平均粒径约30 nm.原子力显微镜(AFM)分析表明溶胶、凝胶中各组分得到了充分而均匀的分散。对凝胶反应机理的研究表明:回流蒸馏过程加速了聚合物活性单体的生成速度和聚合速度,通过缓慢提高活性单体浓度的方法,克服了固相颗粒溶解度随温度升高而增大的不利因素,促进了凝胶化进程,使得凝胶化时间缩短在30 m in之内。RDSG中凝胶干燥采用蒸馏法,大部分溶剂被回收,缩短了合成周期,减小了环境污染。A modified sol-gel process of reflux distillation （RDSG） is introduced. Studies of mechanism show that the formation of monomers is speeded up and the concentration of monomers is increased gradually by reflux distillation process. Gelation time is shortened to less than 30 min. And most of the solvent can be recycled with the following distillation drying process. Using RDSG method, PbZr0.90Ti0 10O3-Fe0.003 nano powder was synthesized. Atomic force microscopy （AFM） tests show that ingredients in both sol and gel are well dispersed. The mean particle size of calcined powder is about 30 nm.

关 键 词：回流蒸馏法 溶胶-凝胶法 锆钛酸铅 分散 

分 类 号：O611.4[理学—无机化学] TQ174.6[理学—化学]