纳米LaF3块体材料的制备及表征  

SYNTHESIS AND CHARACTERIZATION OF Nano-LaF_3 BULK MATERIAL

作　　者：吴大雄[1] 吴希俊[2] 吕燕飞[2] 

机构地区：[1]青岛科技大学材料科学与工程学院,青岛266042 [2]浙江大学材料科学与化学工程学院,杭州310027

出　　处：《中国陶瓷》2008年第6期23-25,共3页China Ceramics

基　　金：国家自然科学基金资助项目,编号:59872031

摘　　要：采用水溶液直接沉淀法制备了平均粒径为16.7nm,粒度均匀,近似球形的LaF3纳米粉体。采用真空高压固结法在真空度10-4Pa条件下常温加压至1GPa制备了纳米LaF3块体材料,相对密度达到92.3%。成型过程中纳米LaF3的晶粒尺寸没有发生变化。退火处理可以使块体的相对密度有一定提高,但是同时也使晶粒尺寸明显增大。Spherical nanocrystalline of LaF3 was synthesized with a method of direct precipitation from aqueous solutions with average grain size of 16.7nm. Nano-LaF3 bulk material was prepared by compacting the powder to 1GPa at room temperature and a vacuum of 10^-4Pa. The relative density of the bulk material was 92.3%. Grain size of nano-LaF3 did not change during the forming process. The relative density of the bulk material can be increased with annealing process. But the grain size of nano-LaF3 will also increase after annealing process.

关 键 词：LAF3 纳米晶块体材料 真空 高压 固结 

分 类 号：TQ174.1[化学工程—陶瓷工业] TB383[化学工程—硅酸盐工业]