沉淀法制超细La_2O_3的粒径控制方法研究  

Control Method of Particle Size of Ultrafine La_2O_3 by Precipitation Method

作　　者：李茜[1] 衣守志[1] 吴燕[1] 吴家全[1] 

机构地区：[1]天津科技大学材料科学与化学工程学院,天津300457

出　　处：《天津科技大学学报》2009年第6期42-44,共3页Journal of Tianjin University of Science & Technology

摘　　要：以草酸和LaCl3为原料,通过沉淀法制备出超细La2O3粉体,研究加料方式、实验用水、升温速率、焙烧温度和分散剂的加入对La2O3粒径的影响.利用激光粒度分布仪和扫描电镜分析超细La2O3粉体的粒径和形貌.实验结果表明:采用逆加法的加料方式,加入复配非离子表面活性剂ZH-08,控制焙烧过程升温速率为28.℃/min,在850.℃下焙烧3.h,可使La2O3的中值粒径(D50)降至1.μm.Ultrafine La2O3 was prepared by precipitation method using oxalic acid and LaCl3,the effect of feeding method, different water for experiment,heating rate,calcination time and dispersant were investigated. The particle size and shape of the product were analysised by granulometer and scanning electron microscope （SEM）.The results indicate that the median diameter （D50） of La2O3 can be decreased to 1 μm by conversed feeding method,additoion of ZH-08 which is compound nonionic surfactant,heating rate was 28 ℃/min,and calcined at 850 ℃ for 3 h.

关 键 词：超细La2O3 分散剂 粒径 

分 类 号：TQ42[化学工程]