【摘要】 采用化学共沉淀法制备钛酸钡电子陶瓷粉体,在共沉淀产物的干燥过程采用恒温干燥和冷冻干燥两种方法,利用扫描电镜观察干燥后的共沉淀产物和煅烧后粉体形貌,以比较冷冻干燥对粉体颗料团聚的影响.结果表明,所制得的粉体颗粒平均尺寸约为200nm,采用冷冻干燥的共沉淀产物的团聚体比恒温干燥的小,说明在液相法制备超细粉体过程中采用冷冻干燥可以减轻颗粒之间的团聚.更多还原

【Abstract】 Barium titanate electronic ceramic powder was synthesized through chemical coprecipitation in this article,and constant temperature drying and freeze-drying were respectively adopted in the drying process of the coprecipitation product.Dried coprecipitation product and calcined powder were observed with scanning electron microscope(SEM) to study the influence of freeze drying on the particle agglomeration.The result indicates that the mean size of powder particles is about 200nm,the agglomerated particle after freeze-drying is smaller than that of after constant temperature drying,that is,freeze-drying can relieve particle’s agglomeration in the super fine powder synthesizing process through liquid phase method.更多还原